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Патент USA US2108767

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Feb. 15, 1938.
A. s.-F|Tz GERALD
‘
2,108,767
PAPER REGISTERING'SYSTEM
Filed Feb. 27, 1936
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3 Sheets-Sheet '1
5
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'152
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INVENTOI?
v
array/v55’
Feb. 15, 1938.
'
'
A. s. FITZ GERALD
’
2,103,767
PAPER REGISTERING SYSTEM
Filed Feb. 27, ‘1936
5 Sheets-Sheet 2
II
INV ENTOR
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‘
2,108,767
Patented Feb. '15, 1938
uuirao STATES P'ATENT OFFICE
2,108,767
PAPER REGISTERING. SYSTEM
Alan-S. Fits Gerald, Wynnewood, 1a., assignor of
oneshall to Frank H. Fleer Corporation, Phila
delphia, Pan, a corporation of Delaware
Application February 27, 1936, Serial No. 66,023
19 Claims.
(Cl. ail-2.6)
The present inventicn relates to packaging and
bag-making machines and more particularly to
a novel apparatus ‘for severing predetermined
‘cent out of registration at the end of ?ve seconds
and ?fty per cent out of register at theend of
twenty-?ve seconds, by which time the severing
mechanism would be cutting through the mid;
6 as paper, metalfoil', “Cellophane” or any other die of a design.' The problems incident to cor
rect synchronization of design position, speed of
severable material.
-In the preferred form of the invention which material and severing mechanism have not here
is taken as illustrating ‘one application of the tofore been successfully solved.
‘
Some of the objects of the present invention
invention the mechanism is shown assembled in
10 conjunction with a machine for wrapping apiece are to provide an improved feed ‘control-for a _
or pieces of chewing gum,‘ candy, or other con
web of material; to provide a speed control for
fections. In this type ‘of machine it is now the ' afed web of material wherein synchronization
lengths of a web or strip of sheet material such
more general custom to provide a strip of wrap
.ping material of considerable length having suc
15 ces'sive legends, advertising or decorative designs
thereon, each of which when severed becomes an
whole area of each individual wrapper for the de
of the travel of the web with respect to a, point
or station is maintained substantially constant;
to provide a device for increasing and decreasing
the rate of travel of a web of material wherein
provision is made for" preventing the amplitude of rate change on the web from increasing cumu
latively; to provide a mechanism responsive to
Qo sign it at once/becomes obvious that the con
Tindicia on.a web of material which automatically ,
individual wrapper for the particular product.
Since it is desirable to utilize substantially the
_ tinuous strip of wrapping material must be
severed at predetermined positions'intervening
between each pair of complete designs.
It has heretofore been proposed in machines
25 employing a device for severing lengths of ma- .
.01
selects a change of web speed to compensate for
a variation of operating conditionaand to pro
vide‘ other improvements as will hereinafter ap
pear.
-
In the accompanying drawings Fig. 1 repre
terial to. use some form of differential gearing to sents a schematic arrangement of a paper feed 25
‘bring about phase or position‘ control plus a ing and registering mechanism embodying one
‘suitable speed control since most such‘ machines form of the present invention; Fig. 2 represents
operate at a ‘relatively high speed. Such‘ con a side elevation of one form of limit switch in
eluded as a part of the present invention; Fig. 3
30 structions have many disadvantages because elab
orate and expensive equipment is required which represents a front elevation of the switch show 0
ing the parts in inoperative position; Fig. .4 rep
is delicate and sensitive to variations of mate
rial feed and other changes of adjustment so that resents a detail elevation of Fig. 3 showing the
the resulting severance soon takes place at other‘ parts in position to arrest control of the paper
' 35 than the correct place. Another prior type of .' for one operating condition; Fig. 5 represents
machine employs‘means, such as electrical relays a detail elevation'of Fig». 3 showing the parts in
and controls, for checking the material when position to bring the paper control into operation
“over-fed’! to'restore it to its original severing in response to manual actuation; Fig. 6 repreposition as nearly as possible. These devices, sents a detail in'section of a device for varying
40 having ‘a complete control cycle including the ac- ._, the period of operation of the paper feed;-- Fig. 7}
tion of relay contacts and positioning devices ' represents enlarged details of the two multiple
at a frequency of several hundred times a minute limit switches; Fig. 8 represents diagrammatically
cause rapid‘ deterioratiomof relay contacts and. a modi?cation of one of the controls shown in
1 to include means for more rapidly bringing '
45 wear of operating
Attention. is here directed to the ' fact that -the paper into registering position; and Fig. 9
apparatus of the‘ type to which this invention - repr'esentsa modified form of indicia control.
relates commonly operates several hundred times _
Referring to ‘the drawings one- form of the
a minute or even more rapidly. , From this it is‘,
presentinvention is shown as applied to'anarticle
clearly evident that a-regulatorcontroliing with
wrapping machine utilizing a paper web i which
is arranged to be fed/with an intermittent motion
to the wrapping apparatus. The paper webs I
are received for use in roll form and, one of them,
50 in an accuracy ‘of one per (cent, if applied to
paper registration, would be of little use,‘ because
the one percent istcumulative.
If sucha ma
chine operates only a hundred and twenty times
here called‘ the supply roll 2, is shown mounted
I a‘ minute (a somewhat low rate of. speed for' for free rotation upon a ?xed shaft 3, so that the
wrapping machinery) the paper would be ten ‘per web can‘ be readily withdrawn therefrom. _ A
.
2,108,767
guide roller I9 is mounted in a position to vsiipport and direct the web I in a'plane to enter the
.
wrapping apparatus.
.
_
_
_
therein which serves as a means for ?ltering
outv the intermittent ‘movement of the paper and
‘ cause its withdrawal from the supply roll 2 at a
,
For‘ the purpose of withdrawing the web I
from the roll 2- and feeding it in an intermittent
uniform speed.
'
In order to maintain suitable tension upon
manner, the‘ web I» is passed between two opposed the paper a friction device is applied to the pe
feed rollers 4 and 5, one of‘ which, preferably 5, friphery of the roll 2 consisting of a rubber roller
> is of deformable material such as rubber.
The
feed roller 4 is fast to a rotatable‘ shaft 6 mount
-10' ed' in suitable bearings, (not shown) and driven
by a slotted star wheel 1 of a conventional type
36 mounted on a spindle 31 journalled in bear
ings 36 carried by an arm 36 which is pivoted
to a fixed support. 40. The arm 39 is maintained 10
under tension by a spring 4I secured to hold
of Geneva movement. As the other part'of this .the roller 36 against the roll 2. A controllable
. movement there is the cooperating‘pin or driv- ‘frictional drag is applied to the spindle 31 by
,_ ing wheel 6 which is fast on ya shaft v3 driven means of a split block 42 mounted on the arm 39
15 by the gearing II). ‘In accordance with the pres-. and held in gripping relation on'the spindle 31
ent invention it has been found desirable to
have the Geneva movement so designed that
during the cycle of operation the paper remains
stationary during approximately Ythree-quarters
20 of each cycle of action and during the remain
ing quarter of the cycle is in motion. The feed
‘roller 5 is arranged to be driven at the same
speed as the feed roller 4 by. means of a gear I_I
fast on the shaft 6 and in mesh with ya like
gear I2 fast on a shaft I3 to which the feed roller
' 5 is'keyed' The-shaft I3 is mounted at one end
in a
pins
?xed
30 I3 vis
rocker bearing I4 »pivotally supportedby
I5 traversing the bifurcated ‘end, I6 of a
bracket I1. The opposite end of the shaft
journalled in a bearing block I6'which is
“ mounted to have a‘ sliding motionin a direction
by ‘wing nutsf43. Coil springs '“S” are inter-,
posed between the wing nuts 43 and the upper
face of ‘the \split block 42. Adjustment of the
nuts 43 regulates the pressure of the split block
42 as will be understood. -.
I As ameans ‘for severing the paper a shear blade _
43, preferably of the reciprocating type is pro
vided in opposed re‘iation to a fixed blade 44 at
the'opposite sideof the web I. The shear blade _
43 is suspended from one end of a rock lever 45 25
pivotally mounted at 46 upon a support 41, the
other end of which‘carrie's a‘ roller 46 arranged
to ride upon the face of _a wiper‘cam 50. This
cam 56 is'made fast to the shaft '9 in such'posi7
tion that its actuating dwell rocks the lever 45 at 31)
the proper time in the cycle of operations
-at right angles to the plane of'the web I. Ac-- . For controlling the operation of the shaft 25,
cordingly a bifurcated yoke 26 forms a guide that is to cause it to turn in'one direction to m- ’
“ for'the block I6‘ and is provided with alined slots crease the pressure of roller 5 so that the web has
35 2I in which ride the-respective ends ofv the guide a forward creep, and to turn it in the opposite
pins‘ 22 of the block I 8. Motion is transmitted direction to vdecrease the pressure of roller 5
to the block I6 by a feed plunger. 23 passing r so that the web has a backward creep, an. elec
through the end of the yoke 26 and threading tric motor 5| is provided which is directly con
into a bushing'24 keyed to a shaft 25. Thus the - nected to the aforesaid shaft 25. This motor 5I
is of the reversing type developing a fractional 40
40 block I8 will ride either upwardly or downwardly.
horse-power and is preferably of the split-series
.. in the yoke 20 according to the direction of ro
tation of- the shaft 25, and in consequence the ?eld construction. j One of these field windings
pressure of the feed roller 5 on the web will-be 52 when energized increases the pressure of the
varied according to operating conditions. 'As to
45 the diameter of the'i’eeding rolls 4 and 5 it should
be noted that this is chosen so that at each action
of the Geneva movement the length of paper
required to be severed from the web will be ad
vanced. In other words where-the paper carries .
feed roller 5'so that the paper is advanced, and
the'other of these ?eld windings 53 when ener
gized rotates the motor 5| in the reverse direc
tion to decrease’ the pressure of the feed roller
'5 so that a/backward creep is'imparted to the
paper web
I.
-
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‘
>
.In order to automatically make
50 a succession of designs, "one for each: wrapper, - ‘the’proper field winding, either
each rotation of the pin wheel 3. will cause a
length of paper to be fed‘ corresponding with the
distance between corresponding portions of suc
'cessive designs.
“ _In accordancewith theaction'oi the Geneva
movement the paper is not fed forward smoothly '
Y but is withdrawn intermittently, the paper re
a selection of
52 or 53, the
winding 52 is connected to a conductor 54 leading
to a fixed contact 55, while the winding 53 is.
, connected to a conductor 56 leading to a ?xed
. contact 51: These fixed contacts 55 and 5.1 are
disposedat opposite sides of a movable contactor
56, which, in the present instance,.is the armature
maining stationary for a period between‘ each' 1 of a control'relay 60. The contactor '56 is- con
intermittent movement of the feed rollers 4' and nected by a‘conductor 5| to one side of the source '
5. In orderfthat the paper may be smoothly .of current 62. " The returncircuit to the motor so
withdrawn from the supply roll‘ 2, so. that. the‘ e5I from the source 62 is by way of conductor 63. '
so
For breaking the ‘energized ?eld winding 62
latter may rotate-uniformly and not in a series
‘of jerks, and in‘ order to a‘voidbre ing of the‘ when the motor 5I has operated to the desired
paper due to intermittent feed acti n,_ a plu-p extent a' limit switch at is'interposed m the con-'
and consists of four spring blades 65,
08 rality" of‘spring biased‘ rollersv 26, 2/1. and. 26 are ‘doctor-54
66, 61' and 66 of conducting material. These
: provided about which the .paper' is caused to
5 “travel in its path to the feed rollers 4 and 5. - blades are arranged in spaced apartrelation, in
I The "roller 26 is rotatably'carriedv by a 'rock lever sulatedv one from another by blocks of insula
llcontrolledby a tension spring 3I. The roller tion 66, and-carried‘by a rockable body". The
.70 21' is rotatably! carried by a rock lever 32. con
trolled by a tension‘spring 33. The roller 26 ‘is
rotatably carried by a‘ rock lever 34"-controlled
blade 65 carries a contactor 1I arranged'in op
posed relation to a contact 12 carried‘ by‘. the blade,
61 andvtraversing an aperture 13 in the blade 66w
- by a tension spring 35,. The operating positions - without contacting with that blade'66. "The blade
is
of the several levers 36, 32 and 34 are such that
the web I travels in ‘a path having a reverse loop
66 carries‘a contactor 14 in opposed relation to
a- contact "on the blade 61. The blade 66 pro- 75.
3
2,108,767 '
jectsbeyond the blade 61 to locate a contact 16
when the paper is at -rest._ If the paper comes
to rest “dark” the photo-cell will receive in
68 which is likewise longer than ‘the blade 61. termittent light ?ashes. .Conversely, if the paper
Thus when the circuit including the conductor 54 comes to rest “light” there will be transient dark
is closed at contact 55, the current travels from periods while the paper is being fed forward.
winding 52, conductor 54 to blade 65, contactor The expression "dark” is used to designate the
1|, contact 12, blade 61, contact 15, contactor ‘14, ' condition when the paper comes to rest so that
blade 66, to the continuation of conductor 54 to the light source upon the black index mark and‘
- contact 55, armature 58, conductor 6| , source oi.’
the photocell is not substantially illuminated.
in opposed relation to a ‘contactor 11 on the blade '
10
“Or
current,.conductor 63, motor 5|, and back to
.
_
’
Forbreaking the energized ?eldrwindi'ng 53
Similarly, the expression “light” is "intended to 10
blade 81 and traversing an aperture‘ 03 in the
frequency variations due to the rectifying action
winding 52.
convey that the paper comes to rest so that light
falls upon a white portion, the photocell being
when thelmotor 5| has operated to the desired 7 thereby-illuminated. Due to these conditions it is
' v\extent, a limit switch 04 is interposed in the con
desirable to connect a condenser H0 in parallel,
15 ductor 56 and consists of four spring blades 65,
', with the relay 60 and having a suitable value in
86, 81 and 80 of conducting material. ‘These relation to the frequency of intermittency. The
blades are arranged in spaced apart relation, in
value of this condenser will be substantially
sulated one from another by blocks of insulation greater than ‘the customary value in such ap
09, and carried by the‘ rockable liody 10. The plication, when the ampli?er is operated from al
20 blade 05 carries a contactor 9| arranged in op
ternating current energy, which condenser has
posed relation to a; contact 92 carried by the‘ then only ,the function of smoothing out power
' blade 86 without‘contacting with that blade 06. of the ampli?er. The‘ value of the condenser IIO
The blade 86 carries a contactor 64 in opposed _ also depends on the relay resistance. If the re
25 relation to a contact 95 on the blade 61. The
‘blade 66 projects beyond the blade 61 to locate
a contact 96 in opposed relation ‘to a contactor
1 01 on the blade 08‘ which is likewise longer than
sistance is from ?ve thousand to ten thousand
ohms it has been found a condenser capacity of
from five to ten micro-farads is satisfactory.
With this value ‘of capacity, the relay remains
the blade 61. Thus when the circuit including» ?rmly on either contact 55 or 51 so long as the
30 the conductor 56 is closed at contact 51, the cur
rent travels from winding 53,v conductor 56 to
blade 85, contactorv 9|, contacts”, blade 61, con
tact 95, contactor .04, blade 66, to the continuation
of conductor 56 to contact 51, armature", con
paper always comes to rest at a similar position.
The relay does not follow the intermittent action
of the paper. Action of the relay is only caused
when a change takes place‘from a condition in
which the paper comes to rest “light” to that in
35 ductor 6|, source of 'current 62, conductor 63, ,
which it comes to rest “dark”, or vice versa. 35
motor 5|, and back to winding 53.
.
For controlling the’ operation of the relay 60, it
is connected to the output of an ampli?er I00
which is preferably of the vacuum tube type re
40 ceiving current by way of the conductors I 0| and
I02 from‘the source of current62. The input of
Thus, the relay 60 gives a steady indication of
whether the paper comes to rest with the index.‘
mark in'the spot of light, or'with the spot of
light falling on a portion of the paper other than
the index mark.
‘
“
'
In order to automatically control the opera»,
the ampli?er I00 is in a circuit including con ‘tion' of the limit switches 64 and 84, a rocker MI
ductors I03, I04, and a phot0~electric cell I05, is provided and pivoted at its middle on a stud
which latter is mounted to receive rays of light II 2 which is carried‘by an arm II3 integral with
from a lens I06. The lens I06 is located to re
the body 10. The ends of the rocker III termi
ceive light rays re?ected from -a face of the paper.
web I, and in this instance a narrow concentrated
‘ band of light is projected upon the web at the
40
nate respectively'in laterally disposed pins I HI
and II 5 which serve respectively as bearings ,for
rollers H6 and “1 of ?ber or other insulating
material. The length of the rocker III and its
position relative tothe body 10 is such that the direct the required beam of lightupon the web I. ' roller I I6 is located in close proximity to the free
This beam of light and photo-electric cell I05 end of the blade 66 of limit switch 64, while the
proper place for-such action.‘ A light source I01
and/lens I09. properly mounted for the purpose
operate ‘in association with index marks I06 in
the form of black printed dots or sections on the
55 web, these marks ‘I08 being respectively located
so that when the paper is at rest the leading
edge of one‘ mark will be entering the light ?eld.
The relation of the marks I00-to the light area
- and to the shearing means 43 is such that the lat
ter is exactly between two successive designs when
a dark index mark I00 comes to rest so that its
' leading edge is lust entering the illuminated area,
roller H1 is located in close proximity to the free , ‘
end of the blade 08. ‘As a consequence of this
arrangement the arc of travel of each roller will r
intercept the adjacent switch blade to thereby;
control a particular circuit. '
. As a means for moving the rocker III accord
ing to. requirements two segment shaped tappets
I20 and I2I are carried by a‘ block I22 mounted
on an L-shaped arm I23 formed as an extension
of a hub I24 which has a worm gear I25 ?xed
-= and as-a result when thel'cut is made one com- - thereto. .Both the hub I24 and the body 10 are»
plete- design is severed from the length ‘of web.
65
It will thus be evident by the foregoing- arrange
rotatably carried by a ?xed spindle‘ I26, though‘
each is movable relative to the other. The radial
ment that; if the paper be threaded up so that a distance’ of the taDDets I20 and I2I from the.
portion of a dark index mark I00 comes to rest spindle I26 is such that swinging movementv
in the spot of light during the stationary period, thereof in either direction will engage one or
the light. falling upon the photo-electric cell I05 the other of the rollers H6 and H1 to cause
70 will 'be‘such that the relay contact 51 will be operation of a limit switch. The sides of each
' closed. ,It is impbrtant to'note that due to the tappet I20 and |2I are grooved as indicated at 70
_ intermittent motion of the paper, the photo-cell ' -I21 to‘ form an undercut head I28 which rides
I05v will receive, transiently, during the quarter
of the“ cycle 'while the paper is in motion, re
‘?ected light other than that which is'received
in a slot I30 of the block I22. Spring ?ngers I3I
and I32 are provided respectively at opposite
ends of the block I22 to act as retainers for the 75
2,108,767
4
ward and backward "creep’? respectively that re
tappets I20 and I2I so that each will be held in sults. This is because ‘the, greater‘ the' amount
place and abutting a tapered/ head I33 which is of angular travel of the ta
t block I22 which
formed as a part of an adjusting screw I34. This
-the corresponding
_is
permitted,
the
greater
screw I34 is threaded into the block I22 ‘and has motion of the gear I25 and accordinglythe more
a knurled head-I35 projecting conveniently for widely separated are the maximum and minimum »
hand manipulation. Turning this screw I34 in limits between which the pressure upon the roller
‘one direction will separate the tappets I20 ‘and 5 ‘is permitted to vary. Thus, if conditions are
I2I so that the limit switches are actuated earlier
uniform and there are no\extraneous inter-'
in the cycle, and turning the screw I34 in’ the very
fering
factors, the oscillation of the tappet block
I’ 10, opposite direction will bring the aforesaid tappets I22 may be held to very close limits and the reg
together so that the limit switches are actuated ' ulation of the paper will be correspondingly lim
later in the cycle.
~
'
ited to a small amplitude of “hunt”. If, on the
In order to have the limit switch properly re
other hand, a change in condition takes place,
sponsive to the control of the paper web feed, such as a variation in the printing-or some change 15
the
spindle
I26
is
so
mounted
that
the
worm
gear
v15
in'friction in the, paper feed, the limitsv of move
- I25 is in mesh with a worm I38 on shaft 25.
of the tappet block I22 will be insufficient
From the foregoing it will be evident that if mentv
to cause enough change inv the pressure applied
the paper be initially. set so that upon starting
the machine the leading‘ edge of a dark index to the feed roll 5 to give rise to a reversal ofc the
direction of “creep”. In other words, the ampli 20
mark I08 is just entering the light spot, then‘ tude of movement of the block I22 must-be suffi
relay 60 will be energized to close contact 55.
Therefore the motor, 5I will turn the shaft 25 in cient, taking into consideration all variable fac
#20
to cause a reversal of direction.
a direction to rotate the tappet block I22 in a tors,
For general operating conditions and with such
clockwise direction. -The kinematic image of variable factors in mind it has been found that 25
25 the design will then slowly advance so that short , further automatic controlling features capable of _
ly the light spot is eclipsed by the entrance of
the dark index mark I38. This will cause the re
automatically correcting for such variations, may
and close contact ‘ advantageously be furnished.
'lay 60 to open ' the contact 55
51 so that the.motor 5I~ is reversed and the tap
30
pet block I22 caused to travel counter-clockwise
to initiate a backward creep of the paper. As
soon as this occurs the white portion of the paper
-
For this purpose a motor I31, preferablyof ‘the
reversing type developing a fractional. horse 30
power and of split-series ?eld construction, is
provided and arranged to drive a shaft I38 having »
will again enter the light spot thereby causing ‘ 8. worm I40 thereon in mesh with a worm gear
“I which is fast to or integral with the body 10.
the relay to again close the contact'55 so that Thus while the worm wheel I25" and tappet body‘ 35
the motor 5I reverses the direction of the shaft ' parts are rotatable on the same spindle I28 as are
25 and again causes the tappet block I22 to ro
the worm gear “I and-body", the ‘two sets of
» tate in a clockwise direction until it is stopped
‘ parts are also capable of relative'rotation. Pref_
by the limit switch due to the tappet block I22 erably it is desirable to maintain a rather close,
to break
causing the contact blades 66 and 61 therefore
‘ regulation and to that end the adjusting screw 40
40 contact as shown in Fig. 4. The paper
is again given. a forward creep. Thus the ‘paper
“hunts” between an advanced position determined
head I33 is set .to provide a relatively small am
plitude of travel of the tappet block I22. If
by the leading edge of the dark spot when 10- _ under some. changed operating condition this
cated so that the light spot is completely eclipsed, small travel does not produce reversal of direction (45
of "creep”, rotation of the worm I40 in an ap
and a position such that the leading edge of the, propriate
direction, re-locates the two. limit
dark spot is just about to enter the illuminated _ switches carried
by the body ‘III, thereby causing
area.v This “hunting” action takesplace at’a the pressure applied
to roller 5 to vary, so that
speed substantially slower than the speed of op
position is found which furnishes reversal
eraticn‘of'the machine. Thegear I25 operates aofnew
direction. In other words, if before adjust
r ‘back and forth at" a relatively slow speed of
ment
of worm gear I4I the pressure applied to
several times a minute, as compared with a speed
5 varies between two pro-‘determined limits
of several hundred operations of the wrapping roller
ering bya given amount,'it will,'after're-ad—
The amplitude of oscillation of the tappet block justment of gear “I, vary between two other
I22, adjustable by means of the screw head I33 limiting pressures differing by an" equal amount,
,both limits ‘displaced either in one direction
in practice, corresponds to the uniformity of the '7 but
the other as may be required.
paper and operating conditions. It will readily or In
order that this readjustment can be made
machine.
I
'
"
,
.
be appreciated that there are a number of cir
-cumstances which
may possibly affect the uni
automatically the limit' switch blade at is pro- ‘
_
form operation of apparatus of the- general type vided ‘with the contact 18 located in opposed rela
to referred to. For example, the wrapping ‘paper tion to the contactor 11 on the blade 58. Like
is usually waxed, and in accordance with chmatic wise the limit switch blade 85 is provided with the '
contact “located in opposed relation to the con-.
conditions, the waxed paper tends to adhere to -taotor_
.31 on the blade 88. Conductors I48 and
itself on the roll to a greater or less degree, thus _
I4‘! are respectively connected to the switch
paper
as
it
is
with-.
(35 affecting the tension of the
drawn from the roll; Likewise, the paper is liable blades 58 and 88. The conductor I45 leads. to the
winding of a transformer I50, the ‘sec
to shrinkage during storage'and in accordance primary
ondary ‘winding of which is of relatively large
Further; .
with the humidity and temperature.
cross section suitable for supplying current of
more, due to similarvariations during~the process high amperage and relatively low voltage. The 70
of printing the spacing of the printed legend is conductorjI4‘I leads to the primary winding of a ,
likewise subject to small variations. The amount ' second transformer _I5I, the secondary winding
of travel of‘the tappet block must be ,su?lcient -of which is also of relatively large cross-section
,to produce reversal of the direction of “creep” suitable for supplying current of high amperage
of the paper. .The wider the amplitude of oscil- _
lation permitted, the greater is the speed of for ‘and relatively low voltage; The-two aforesaid
2,108,767
primary windings are suitable for energization at
the voltage of the source 62. The secondary
windings are respectively connected directly to
two bimetallic strips I52 and I56, each of which
is of .elongated U-shape and coiled into helical
,
a
_
I
5
heated by the transformer secondary currents
when energized, and to cool when the transform
ers are deenergized accordingly, at the frequency .‘
at which the “hunting" .action takes place, the
contacts I55 and I56 do not visibly oscillate.
Undervall normal conditions, the contacts of the
direction from‘ the other so as to operate di?er
thermostatic device remain open. The effect,
entially. The free or closed ends of the strips . however, of the thermostatic‘ device is to give a
form, one-however, beingcoiled in the opposite
_ I52 and I53’ are connected to an insulating block
10 I54 (shown diagrammatically as an elongated
strip) having contactors I55 and I56 for engage
ment respectively with the contacts I51 and I56.
The contactors I55 and._I56 are respectively con
preresponsive action in respect to a tendency to-v
wards change in the operating condition.
10
Before a condition is ‘reached such that the
limits of travel of the tappet block I22, and ac
cordingly the pressure limits between which the
nected to the conductors I46 and I41 by ?exible ’ _ roller 5 varies do not permit reversal of the di
15 connectors I66 and I6I. The contact I51 is con
nected by .a conductor I62 leading to the ?eld
rection of “creep” to be produced, the thermo
15
static device anticipatesthe changed conditions .
winding I63 of the motor I 31, ‘and a normally
and automatically repositions the limit switches
64 and 64 .by rotating the member 16 slightly in
ductor I62. The contact I58 is connected by a one‘ direction or the other, as may be required.
20 conductor I65 to the other ?eld winding I66 of
When the position of the'member 16, which 20
the motor I31, and a normally closed'switch I61 carries the switches 64 and 64, is precisely correct
is included in the circuit of conductor I65. The ' for the operating conditions, paper quality, etc.,
two switches I64 and I61 are ?xedly mounted the movement of the tappet block I22 under for
adjacent to the gear I25 and are designed to be ward creep action is approximately equal to its
opened by trip rollers I68 and I16 here shown as movement under backward creep action, the two 25
mounted on an arm I" integral with the body ~ switches 64 and 64 limiting the respective move
closed switch'l 64 is included in the circuit of con
16, both serving as a safety means ,to prevent
over-running of the motor 5I,'when the mechani
cal ‘limits of the tappet control have been reached.
30
From the foregoing it will be observed that un
der normal conditions when the forward and rear
ward “creep” of the paper are substantially equal,
bi-metallic strips I52 and I53 will be energized
ments. Under these conditions, the duration of .
energization of the transformers I56 and I5I
respectively, which is initiated when I22 is ar
rested in either position by one or other of the
limit switches and which‘ is terminated when the
relay 66 operates in response to the reversal of
the paper which results from the change in the
for approximately equal periods, and will accord
pressure applied to the roller 5, is equal. when,
35 ingly apply equal and opposing torsional forces however, conditions so that the. position of 64 and
to the contact block I54. '' The contacts I51 and - 64 is no longer correct, the forward “creep” which
I58 are normally open under this condition and occurs when I22v is arrested in the clockwise posi
no energization of motor I31 results.
'
' Assuming that due to some change in operating
conditions, such as those heretofore explained,
the paper is fed forward insu?iciently, this, re‘
sults in inequality of duration of energization of
the conductors I46 and I41, and the conductor
I46 will be energized to a greater extent than the
conductor I41. This will cause unequal heat
ing of the bi-metallic strips I52 and I53 which,'
no longer exerting balanced forces upon the block
I54, will move the/movablecontacts in a direc-_
tion by 64 may no longer be‘ equal to the back
ward “creep” which results when I 22 is arrested
by 64 in the counter-clockwise position. when
this occurs, reversal of direction of “creep" will'
be brought about more readily in the direction
in which the “creep” is least and will takelonger ,
to affect in ‘the direction in which the "creep”
, is greater. Accordingly, energization of I56 and
I5I will not longer beequal. For example, suppose
the conditions are such that the forward “creep" '
, is somewhat greater. than the backward “creep”.
tion tending to close contacts I55 and I51.
,
50 - It is especially to be noticed that energization
Under this condition when the index mark moves
into the light spot and relay 66 drops out closing
I56 and I5I' can only be affected so long as one
or the other of the relay contacts 55 and 51, and
contact 51, the pressure on 5 will be automatically
slightly reduced and in due course, if the condi-tions of inequality are slight, the “creep” will
commence to take place in the backward direc
of either of the primary windings of transformers
the corresponding "make” contacts 14 and 64 of
55 the limit switches are closed.
Energization of the ' tion until the'index mark move backwards out of
transformer windings therefore, cannot take
place except while gear I25 is in one or the other
of its stationary positions or extremities. '
the light spot. This will cause relay, 66 to‘pick.
up, closingcontact 55 andthe presure upon the
'
roller‘ 5 will again be augmented. Because of
the greater tendency in favor'of the forward
60 the paper has, for a few moments, been exposed‘ “creep”, the response to this action of the relay
For example, suppose that a white portion’ of
to the’ light spot and, as a result, relay contact
55 has been closed. The gear I25 will have ro
tated to vits extreme clockwise position and trans- _
will be 'moreprompt than was the case in- the
other direction.‘ Accordingly under these condi
tions,‘the [tappet block I 22 will be stationary for
former I56 will be energized. Suppose now the
paper “creeps” forwardslightly so that a dark
portion of the registering index mark moves into
more prolonged periods in the counter-clockwise '
the light spot. This will ‘cause the relay to open
contact 55v and close contact 51. Immediately
when this happens, transformer I56 is de-ener
gizcd. Only after. the gear I25 has rotated to
its extreme counter-clockwise position, operating
the opposite limit switch is transformer I_5I ener
energization of I5I will exceed'the energizatlon. .
gized.
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direction than will be the case in the clockwise
direction. Accordingly the integrated period of
of I56. Thus I53 will attain ahigher temper
ature than 'I52. This will result in closing con
tacts I56, I56, which will cause motor I31 to 70
reposition 64 and 64 in the counter-clockwise di- -
rection which will bring about equality of back- .
ward and forward “creep" and accordingly equal
The bi-metallic strips I52 and I53 being of sub
durations of heating of I56 and I5I.
'
stantial thickness take a few seconds to become " For'facilitating supervision and putting the ap- '
6
2,108,767
paratus into action at the commencement of a contact 51 and the gear I25 rotates in a coun
run of the wrapping machine, two electric signal ter-clockwise direction, coming to rest with the
‘lamps I12 and I13 are provided and connected, limit switch 54 in-the position shown in Fig. 4.
This gives the normal, slow, backward "creep”
respectively in parallel with the primary wind
ings of the two transformers I50 and I5I. A third and the paper is thereafter automatically reg
‘ signal lamp I14 is located in a circuit arranged
'_to be energized whenever current is supplied to
the motor I31. Under normal operating condi
tions the lamps I12 and I13 are illuminated in
10 termittently and alternately , for ‘equal periods.
Should a change in the uniformity of operating
istered in the normal manner as hereinbefore
described. Similar'action is, of course, provided
in the opposite direction by means of the push
button
I18.
.
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'
While the apparatus just described serves to 10
manually frame the design under starting con
ditions there isoften necessary a further adjust#
conditions such as explained take place an in
equality of the duration of the illumination of. ment of the worm gear I25 to correct for initial
‘the lamps I12 and I13 will at oncebe observable. conditions, or di?erent quality of paper, or vari
"15
This is because lamps I12 and I13 are energized
concurrently with transformers ‘I50 and I5I. If
this condition persists a momentary illumination
of the lamp I14 will occur which indicates that
the motor I31 is now in operation to reposition
the gear “I and associated parts. _In practice
ations in the printing. - To take care of such
contingencies two additional push buttons I80
and I8I are provided and connected respectively
in parallel with thecontacts I51 and I58. 'I‘here- - v
fore by closing one of the push ‘buttons I80 and
I8I according to the direction to be given the 20
it has been found that usually the lamps I12 and paper, the motor I31 can be immediately oper
I13 are lighted at intervals of several seconds, ‘ ated to reduce the rate of “creep" to a substan
while the lamp I14 is lighted several times in an tially stationary effect. Thereafter one of the
push-buttons-I15 or I16 can be closed and the
hour or more.
'
In order to initially operate the control mech- ; framing of the paper done accurately. 'Ihus in
:anism sothat the design on' the paper can be normal practice ‘when a machine is stopped, for
‘example at the'end of a working period, or for
- manually "Iram‘ed”, two normally open push but
tons I15 and I18 are provided, the former being ‘threading a new roll oi.’ paper, ‘the position of
in the circuit of a conductor, I11 leading from the gear, “I will be correct for proper registra
30 conductor 5| to'the blade ,51 of limit switch 54,
' and the latter- being in the circuit of a conductor
tion. Therefore in resuming operation of the
machine it is only necessary to thread the paper
when the machine is at rest so that the paper is
I18 leading from the conductor" to the blade ‘properly registered, or after starting the machine
i
‘
81 of limit switch 34. '
.If the paper he threaded, with the machine at.
rest,v so that when it is started the design is con
siderably out of register, the automatic action of
the relay 80 will in due course tend to bring it into
the proper position. However, the normal move-_
‘ ment' of the gear I25is very small and the posi
to frame it by one ,or the other of the push but
tons I14 and 115. When, however, a machine is
started-for the ?rst time it is generally neces
sary to make an adjustment of the-position of the
gear I“. Also ;this adjustment may be made
necessary by other varying conditions such as
tions' in which the gear I25 is arrested by the those heretofore referred to. The operator can
, limit switches 54 and 84 are such as to give‘ very visually tell ‘whether the gear “I is properly
' slow rates of forward and rearward “cr pill It. positioned by ‘watching the action of the web.
is, therefore, convenient to provide the a oresaid .Thus, if the position‘; of the gear “I is correct,
push button control for obtaining a substantially ' (whether or not the position of the design on
greater rate of forward or rearward t‘creepi’ when \ the paper is in register -or' not) ' when the ma
it is desired manually to control the position ,of " chine is started the kinematic image of the de- .
the paper, so that .a more rapid response may be sign will ‘be substantially stationary, and the
'normal “creep" will be very slow. ' If the posi
obtained.
tion of thegear I“ is not quite correct the
‘.By reference to the diagram of Fig. 1 it will be
seen that if the design is rearward of .the proper
position so that the gear I25 has come to rest’in
the' clockwise direction, the limit switch<64 op
“creep’_' will be more noticeable.
Then by de-v
pressing one ‘or the other of the push ‘buttons
I80 and I8I, accordingjto whether advance or '
If,
now, push button I15 be depressed this will have
retard is necessary, the motor I31 can'be im
mediately operated-so that the rate of “creep"
is,reduced to a substantially stationary effect. 55
With this accomplished, operation of the re
and thence to the ?eld winding 52 of the motor
shown wherein two relays I82 and I83, having
erated, the motor 5I will have beenistopped by
the opening of contacts 14 and 15.
This will
55 give ajvery slow' rate of forward "creep”.
the effect of short circuiting the break between - quired button I15 or I15 will make correct fram
.
1
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.
'I and 15..by ‘establishing a circuit from switch. ing possible.
In Fig. 8 a modi?ed form of the invention is
' blade 61,. contact 12, contact 1I to the blade 55
5I. -Motor 5| may, therefore‘, again operate. operating coils I84 and I85 included in ‘a circuit
to turn the gear I25 in‘ a‘. clockwise direction comprising conductors I85, I81 and I88 are so
and‘still further increase the pressure upon roll 1connected to the circuit of the thermostatic
‘ 5. The construction .of the rocker III permits control as tobe in parallel relation with the
circuits» operated by the contacts‘ I51 and I58. 65
65 of further movement of the tappet block I22 ' The relay I82 is arranged to operate a contactor
without deformation of the spring blades 58, 56,
because the‘ tappet passes over the roller H5 I90 for closing contacts I9i in the conductor
and, with additional rotation of the gear I25 I18, while the relay I83 has a contactor I32 ar
vdirectly. engages the‘ switch ‘blade 55, thereby ranged‘ to close contacts I93 in the conductor 4
I11. These two sets of contacts I8I and ‘I83
70 opening the motor circuit and~arresting the gear are respectively in parallel relation to the push
I25 at-a new position shown in Fig.5 which gives
is
a rapid forward “creep”. The button I15 being button controls I15 and.I15 'and perform the
now released, the paper ‘is quickly drawn for - same function as do these push buttons, but
ward until the trailing edge of the mark I58 do it automatically. It will therefore be obvious
enters the light'spot. The relay 50 'now closes that whenever one of ‘the contacts I51 or I58 75
2,108,767
is‘ closed the corresponding relay I82 or I03
7.
may affect the response of the photo-electric ap
1 will be energized to thereby operate its contactor
and cause the motor 5| to rotate in the required
paratus.
V
I
.
I
Exact tracking of the paper‘ is of- like impor
direction to vary the rate of feed of the paper
web. This serves as a relatively rapid restoring
'of normal operating conditions and is useful in
tance since a slight change in the angle of the
correcting a suddenly manifested displacement
from register of the web, such ,‘as might be
When metal foil or other material which has
a surface giving specular ‘re?ection is used it is
preferred to employ as an index mark on the web;
surface of the paper would similarly affect the
angle of incidence.
, caused by the breakage _of the paper during print
10 ing, and the‘ paper having been rejoined with
'
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I
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pigmented indicia having two adjacent ?elds, one
light and one dark. The pigment should be
out proper continuity in respect to‘ the design‘
10'
and registering indicia I08. ‘Also in the event opaque and may have a matt surface. ' In this
that the printing mechanism should become manner, either paper or metal foil may inter
temporarily defective so that a length of paper - changeably be used without modifying the ad
justm'ents of the machine.
_
having no registering indicia thereon is fed to
the machine, there would be a periodv when the
automatic control heretofore described would
be out of action, and the paper completely out
of ‘register when the printing and indicia again
420 reappears- on the paper. While the automatic
mechanism heretofore described will eventually
allowthe paper to creep through a distance equal
to the 'extent'of the discrepancy, the apparatus
of the modified form will make such correction
.15
Fig. 9 shows a portion of a web 2.!!! wherein
each index mark consists of two ?elds 200 and
204 for the purpose. indicated above.
From the foregoing description of the appara? ‘
tus of the present invention it will be apparent
that a web control has been devisedwherein the .
travel of the web is always maintained syn
chronized with respect to a point; such as that
where the severing knives 43 and 44 are located.
The function of the apparatus is not only- to
bring about an acceleration and deceleration of
the web according to conditions but also to pre
farmore rapidly.
In connection with the operation‘v of the shaft
- v25 by its motor‘il, while it is desirable that the
motor be of the quick startingtype, it is equally
undesirable that the same should have any tend~
30 ency to overrun by reason of its momentum,
after the motor circuit is opened by one or the
other of the limit switches. To remedy this con
vent the amplitude of rate change of the web from
increasing cumulatively.
'
,
,1 In this connection it should be noted that the 30
relay 60 and the motor 5| alone will not give the ‘
desired type of control and would only cause a
condition of instability. This is because the cor
recting action would be cumulative and the ma
terial would oscillate back and forth with a
dition an automatic braking device2 may be em
ployed consisting of a brake shoe vI94 arranged to.
be" operated by a solenoid I951 included in» the
. motor circuit.
‘ .
steadily-increasing amplitude until it fell out of
A spring actuated armature I95
synchroni-sm entirely. .In other words a condi
normally holds the shoe I94‘ against a drum I91
fast to the shaft 25 as long as the motor is not ‘tion would be reached ‘where the paper would
energizedfbut is immediately retracted when the either-be having a constant backward creep or
a constant forward creep and there would be no‘ 40
motor isenergized by reason of the series con
possibility of\ automatically shifting from one
. ne‘cted solenoid I95.
For manual control of the respective (circuits - kind of creep‘to the other. '
a conventional main switch I98 is located in the ‘ ‘By the use of the described limit switches this
source line, while double pole switches 200 and amplitude is maintained constant and as a re
2M are connected respectively in the circuit of . sult the relation between the indicia of the web
.' relay i0 and in the circuit which includes the - and the point of severance is maintained con
' transformers I 50 and Iii.
stant.- Furthermore
.
In Fig. 1 the index mark of the web is shown as
a similar-dark spot;v When the index mark does
notcome to rest in the illuminated area, the light
'is re?ected by the normal material of the web;
For instance,as is often the case, the web is of
paper, under the latter condition the light is re.
creased or decreased to re-establish more cor- .
rectly the proper phase‘relation or for they pur its
dinary paper the manner in which the. ‘light is
photocell I05 through the lens I06 tends to-_be
supplemental
manually or automatically. In doing this auto
matically a ‘novel energy storing selecting means
is provided wherein the rate change‘ can be in
?ected from the surface of the paper. .. With or
re?ected from the surface of the paper on to the
ingenious
mechanism are provided whereby the action of
the‘limit‘ switches can be altered .at will to suit
different existing conditions and this may be done
pose of either initially or at‘any other time fram
-
ing the web.‘
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,.
.
\
,
.
While only a single form .is shown inwhich
‘diffused rather than specular. That is to say,
the angle oi’ incidence between the rays of light this invention may be embodied, it is‘ to be un
approaching and leaving th'epaper are .not critI-_ derstood that the invention is not limited to? any 00
cal.
‘
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i
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speci?c ~construction, out might be applied to-'
various forms without departing from the 'pirit
Where highly glazed paper, metal foil, or the =of
the invention or the scope of the ap " ded .
like is employed: specular re?ection ‘may take
place to a large extent and under this condition
Having thus described my invention, I claim:-'
the intensity of the light falling upon the photo;
1. A material feed control comprising the com
cell I05, and thereforejt'he magnitude of the
bination of a device for feeding a web» of mate
photoelectric current‘ ‘received by the ampli?er - rial
past iii-predetermined point, said web having
IOI,‘ maybe subject to variations of substantial
claims.
_\
.
I
.
i
.
indicia inspaced relation thereon, a mechanism
extent should there be any slight variation in the - for
increasing and decreasing the rate of web
angles of incidence. .Should this-be the case,
more_;adjustment of the positions of the light
feed, means responsive tov a change of phase re-.
lation of said indicia to said point to actuate said
to
source, photocell and lenses, is necessary, and if
mechanism 'to both ‘increase and decrease the
this adjustment. should not be accurately main - rate
of web feed according to said change of
tained due to vibration of the machine, etc., this phase relation, and means ‘associated with said 75
‘2,108,767 '
of web feed, means associated with said respon- I
responsive means to prevent ‘the amplitude " of rate
sive means .to prevent the amplitude of rate
_' change on said web from‘increasiug cumulatively,
whereby substantially constant phasev relation
between said indicia and said point is maintained.
2. A material feed control comprising the com
change on said web, from increasing cumulative- ‘
1y, said preventing means including circuit con
trolling limit switches for respectively stopping
- rate changes after a predetermined interval, and '
bination of a device for feeding a web of mate
-means including an assembly for selectively vary
rial, a mechanism for increasing and ~decreasing
the rate of web feed, means for actuating said ' ing ‘the positibn of said limit switches relative
a mechanism automatically to both increase the to said responsive means while maintaining a‘
constant relation between said switches, where. 10
10 rate of feed when the feed is too slow, and de
by a diiferent limit control can be established
crease the rate of feed when‘ the feed is too fast,
and means associated with said actuating. means
to prevent the amplitude of rate change in" said ,
web from increasing cumulatively.v
‘at
will.
i
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i
,
'
1
"I. A materialfeed control comprising the com
~' bination of a device‘for feeding a web of mate
»
rialpast a predetermined point, said web having
3. A material feed control comprising the com-y
bination of a- device forfeeding a web of mate
15
indicia in-spaced relation thereon,‘ a mechanism '
for‘ increasing and decreasing the rate-of web
rial past a. predetermined point, said web having
feed, means responsive to a change of phase rela
tion of ‘said indicia to said point to actuate said
mechanism to increase and decrease the rate of 20
indicia in spaced relation thereon, a mechanism
for increasing and decreasing the rate of web
feed, means responsive tof~a change of phase
relation of said indicia to said pointrto actuate,
web feed, means associated with said responsive
said mechanism, to increase and, decreasethe " means to prevent the amplitude of rate change
I rate of web feed, and means vassociated with said on_said .web from increasing cumulatively, said
responsive means to prevent the amplitude of‘ preventing meansincluding'circuit controlling limit switches for, respectively stopping rate
f rate change on said web from increasing cumu
, latively, said preventing means including circuit “ changes after va predetermined interval, and
means for varying the limit points of'operation '
controlling limit switches for respectively, stop
ping rate changes after a predéte'miinedinterval.‘ of said limit switches, whereby the time of oper
, 4. A material ‘feed control comprising the com- 4 ation of each rate change is fixed.’
'
_8. YA material feed control comprising the coni
bination of a device for feeding a'web of mate
rial past a predetermined point, said web having
indicia in spaced relation thereon, a mechanism
biiiation of a device for feeding a web ofv mate»
rial, a mechanism for'increasing and decreasing
for increasing and decreasing the rate of web , ‘the rate of web feed, means for automaticallyv I
actuating said mechanism according to feed vari
ations, and means associated with said actuating.
feed, means responsive to a change of phase re
lation of said indicia to-said point to actuate
40
said mechanism to increase and decrease the ‘ means to prevent the amplitude of rate change in
rate of web' feed, means associatedwith said said web from increasing cumulatively, said pre-'
responsive means to prevent the amplitude of venting means including circuit controlling limit
switches for respectively stopping rate changes
‘rate change on said web from increasing cumu
latively, said preventing means including‘ circuit ' after a predetermined interval, an oscillatable
control‘ member operated by said actuating
controlling limit switches for respectively stop
' ping ratechangesaafter a predetermined inter- ‘ means and arrangedto operate said switches re
val, and means for varying they,-position ‘of said ' spectivelyat the ends of its stroke, and'means'
to vary the amplitude of oscillation of said con
' while maintaining aconstant relation between “ trol member, whereby the time of rate change is is
' limit switchesrelative to said responsive means
said switches, whereby a diiferent limit control
can be established at will.
varied.
i _
5. A material feed control comprising the com
bination of a device for feeding a web of mate‘
rial past a predetermined point, said web having
indicia in spaced relation thereon, a mechanism
for increasing and decreasing the rate of web
.
.
9. A' material feed control comprising the com
' bination of a device for feeding a web of mate-.
rial, a mechanism for increasing and decreasing
the rate of web feed, means for automatically
actuating said mechanism according to feed vari
atiohs, and means associated with said actuating
means to prevent the amplitude of rate change
feed, means responsive to a change of phase rela
tion of said indicia to said point to actuate said i in said web from increasing cumulatively, said
mechanism to increase and decrease the rate of preventing‘ means including circuit controlling,
web feed, means associated with said responsive limit switches for respectively stopping rate
' means to prevent the amplitude of rate change changes after' a predetermined interval, an os
cillatable control ‘member operated by said actu
preventing means including circuit controlling, ating' means and arranged. to operate said
switches respectively at the ends of its stroke,
(21) limit switches for respectively stopping rate
changes after a predetermined interval, and and means to adjust said witches bodily‘ with‘
means including an energy storage control for resmct to said control member.
_ on said web from increasing cumulatively, said
varying the position of said limit switches rela- '
tive to said responsive means while maintaining
a constant relation between said switches, where
by a different limit control can be established
at‘will.
I
6. A material feed control comprising the com
bination of a device for feeding a web of mate
rial past a predetermined point, said web hav
ing indicia in spaced relation thereon, a mecha
nism for increasing and decreasing the rate of
10.-A material feed control comprisingbthe
combination of- a 'devicefor feeding a web’ of
material, a mechanism for increasing and de'-"‘
creasing the rate of web feed, vmeans for auto
matically actuating said mechanism according to
feed variations, and means, associated with said
actuating means to prevent ‘the amplitude of
rate change in said ,web from increasing cumu
latively, said preventing means including circuit.
controlling limit switchesfor respectivelvstop?
web feed, means responsive to a change of phase I ping rate changes after a predetermined interval,
relation of said indicia to said point to actuate i, an oscillatable control‘ member operated by said
vsaid mechanism to increase anddecrease the rate actuating means ‘and arranged to operate said 75
2,108,787
switches respectively at the ends of its stroke,
and manually actuated means ‘to adjust said
switches bodily with respect to said control mem
ber.
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>
11. A material 'feed control comprising the
combination of a device for feeding a web of mate
rial, a mechanism for increasing and decreasing
the rate of web feed, means for automatically
actuating said mechanism according to feed-vari
- 9
increasing cumulatively, whereby a substantially
constant phase relation between said indicia and
said point is maintained.
15. VA material feed control comprising the
combination of a evice for intermittently feed
ing a continuous web of material past a pre
determined point, said web having indicia in
spaced relation thereon, said device including a
deformable member arranged to vary the rate
10 ations, and means associated with said actuating
of web feed, a control assembly for causing said 10
means to prevent the amplitude of rate change in
said web from increasing cumulatively, said pre
venting means including circuit controlling limit
member to function, a mechanism responsive to
a change of phase relation of said indicia to said
point for actuating said control ‘assembly to re
store said phase. relation, and means to prevent
the amplitude of rate change on said web from 15
switches for respectively stopping rate changes
15 after a. ‘predetermined interval,v an oscillatable
control member operated by said actuating means
and arranged to operate said ‘switches respec
tively at the ends of its stroke, and an automati
cally actuated means to adjust said switches
20 bodilywith respect to said control member.
increasing cumulatively‘, whereby a substantially
constant phase relation between said indicia and
said point is maintained. v
16. A material feed control- comprismg the
combination of a device for feeding a continuous 20
12. A material feed control comprising _ the
combination of a device. for feeding a web of
web of material pasta predetermined point, said
web having indicia in spaced relation thereon,
"material, a mechanism for increasing and de
creasing the rate of webv feed, means for auto
25 matically actuating said mechanism according to
feed variations, and means associated with said
actuating means to prevent the amplitude of rate
change in said web from increasing. cumulatively,
said preventing means including circuit control
30 ling limit switches for respectively stopping rate
changes after apredetermined interval, an os
cillatable control member operated by said actu
said device including a deformable member ar
ranged to vary the rate of web feed, a control
assembly for causing said member to function, 25
a mechanism responsive to a change of phase ‘
relation of said indicia to said point for actuating
said control assembly to restore said phase rela
tion, and means to prevent the amplitude of rate
change on said web from increasing cumulatively, 30
whereby a substantially constant phase relation
between said indicia and ‘said point is maintained.
ating means and arranged to operate said switch- 17. A material feed control comprising the
es respectively at the ends of its stroke, and means combination of a device for feeding 'a web of
35 including av reversible motor for bodily moving
material past a predetermined point, said web 35
said switches with respect to said control mem
having indicia in spaced relation thereon, a
ber. two circuits for said motor, and an energy mechanism for increasing and decreasing the
storage assembly for automatically selecting one rate of web feed, means responsive to. a change
or the other of said circuits according to oper
in phase relation of said indicia to said point to
actuate said mechanism to both increase and
40 ating conditions.
13. A material feed control comprising the decrease the rate of web feed, means associated
combination of a device for feeding a web of with said responsive means to prevent the ampli
material past a. predetermined point, said-web tude of rate change on said web from increasing
having indicia in spaced ,relation thereon, a cumulatively, and means controlled by said pre
venting means for automatically changing’the
- member arranged to vary the rate of web feed,
a dual control assembly for causing said member rate of web acceleration or deceleration accord
.
‘to increase or decrease the rate of web feed, a ing to conditions.
mechanism responsive to a change of phase rela
18. In a material feed control comprising the
tion of said indicia to said point for selectively combination of a device for feeding a web of
50 actuating said dual control to cause said member material past a predetermined point,‘said web
to vary the rate of web feed to restore said phase having indicia thereon arranged in spaced rela
relation, and means to prevent the amplitude of tion, each indicia consisting of two abutting
opaque ?elds of color contrasting with each other
rate change on said web from increasing cumula
tively, whereby a substantially constant phase and with the web, and means responsive to the
relation between said indicia and said point is ?elds of each indicia for respectively controlling
the rate of travel of said web.
19. A material feed control comprising means
14. A material feed control comprising the
combination of a device’tor intermittently feed- . for rotatably mounting a roll formed of a web of
maintained.
,_
-
-
'
ing a. continuous web or material 'past a prede'e'
material, a device for feeding said web past a .
predetermined. point, said device including a de 60
formable roller contacting with said web for in
able member arranged to vary the rate 0! web creasing and decreasing the rate of feed. accord
feed, a. dual control assembly for causing said ing to requirements, said web having indicia
member to increase or decrease the-rate of web. thereon for respectively registering with said
feed, a mechanism responsive to a change of point, and means coactingwith said indicia for
phase relation of said indicia to said point for automatically deforming said roller according to
selectively .actuating saidv dual controlv to cause feed variations whereby said indicia are main
60 termined point, said web having indicia in spaced
. relation thereon, said device including a deform
tained in registering relation.
said member to vary the rate of web feed to re
store said phase relation, and means to prevent ~
70 the amplitude of ‘rate change on said web from
_
ALAN b. FITZ GERALD.
‘‘
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