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Патент USA US3099190

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July 30, 1963
F. E. MUNSCHAUER, JR., EI‘AL
3,099,180
FEED ROLL RELEASE MEANS FOR POWER PRESSES
Filed Aug. 29, 1957
3 Sheets-Sheet 1
ORNEYS. '
July 30, 1963
F. E. MUNSCHAUER, JR., ETAL
3,099,180
FEED ROLL RELEASE MEANS FOR POWER PRESSES
Filed Aug. 29, 1957
3Sheets-Sheet 2
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INVENTORS
f‘mderzcls??unschauon in
BY GeorgeE/‘fzmsc‘hauoh
ATTORNEYS
July 30, 1963
F. E. MUNSCHAUER, JR., ETAL
3,099,180
FEED ROLL RELEASE MEANS FOR POWER PRESSES
Filed Aug. 29, 1957
3 Sheets-Sheet 3
166.5.
65
67
66
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H6. 7
INVENTOR.
FREDERICK E. MUNSCHAUER,JR.,
GEORGE E. MUNSCHAUER
BY acu-nv s. PLATOU
ATTORNEVS.
sgaaaiso
Patented July 30, 1§63
2
pins of the die mechanism. Thus both the beginning and
3,099,180
FEED R011. RELEASE MEANS FUR
POWER PRESSES
Frederick E. Mnnschauer, In, and George E. Munschauer,
Eggertsville, and Leiv S. Platou, Snyder, N .Y., nssignors
to Niagara Machine 8: Tool Works, Bu?alo, N.Y.
Filed Aug. 29, 1957, Ser. No. 681,079
1.1 Claims. (Cl. 83-230)
the end of the roll release period depend upon the par
ticular die arrangement, design and operation and there
fore means for readily selecting the duration of the roll
release period and the exact time of its beginning and
termination is an important consideration and provides a
very important advantage in roll feed operation.
The release of the feed rolls during the actual stamping
operation has heretofore been proposed but has usually
This invention relates to the power press art and more 10 been eifected by a more or less makeshift arrangement
particularly to an arrangement for controlling roll feed
mechanisms which are commonly employed in conjunc
tion with such presses for feeding more or less continuous
comprising an abutment member carried by the vertically
movable slide of the press, either directly or through air
Valves operated by such an abutment member. A great
strips of sheet material to the die mechanism of the press,
deal of wear is involved in a roll release arrangement of
particularly in high speed press operation.
15 this type, ‘as well as in further types wherein movement
Power press roll feeds are well known and commonly
of the slide controls a microswitch or other device which
employed adjuncts to power presses when coils or rolls
of continuous strip metal are used for feeding the dies of
such presses. Automatic roll feed mechanism are par
actuates the roll releasing mechanism. Other feed roll
controls involve solenoid air valves operated by a cam on
a rotary limit switch but operation of controls of this type
ticularly advantageous in high speed automatic power 20 is difficult to control with the desired accuracy.
Furthermore, most roll releases of the prior art, both
press operation which has come into wide use at the pres
ent time. Conventional roll feeds are commercially avail
able and are adaptable for use with power presses of var
the foregoing types and others, are such that the duration
of roll release is not readily adjustable and is so arranged
that the release and re-engagement of the feed rolls
ious manufacture. The present invention is concerned
particularly with the manner in which the rolls of such a 25 necessarily occurs at corresponding points in the down
feed mechanism are correlated with the operation of a
and up strokes of the slide of the press.
power press and accordingly the details of the feed roll
The roll release arrangement of the present invention
mechanism itself need not be shown in detail.
is such that the releasing action is accomplished by a di
The feed roll mechanism illustrated generally herein
rect downward force on the roll release arms and without
and referred to by way of example is manufactured and 30 the abruptness inherent in prior art devices and by means
offered commercially by ‘F. J. Littell Machine Company
of a smooth eccentric action which is much safer and
subject to much less wear of the associated parts than in
of ‘Chicago, 'Illinois, and the general construction and op
the case of prior devices.
eration of the feed mechanism is illustrated in United
States Letters ‘Patent No. 1,858,403 to Littell, dated May
Furthermore, the arrangement of the present invention
17, 1932; No. 1,947,015 to Littell, dated February 13, 35 is such that the duration of the time cycle of roll release
may be adjusted from floor level and may be set to begin
1934; No. 2,315,446 to Miller et a, dated March ‘30,
and end at independently predetermined points in the
1943; No. 2,753,l83 to Wiig et 211., dated July 3, 1956;
time cycle. That is, the roll releasing cycle need not end
and No. 2,758,837 to Littell et 211., dated August 14, 1956.
at a point exactly corresponding to the beginning point
In most instances roll feed mechanisms are employed
which comprise feeding means at both sides of a power 40 but on the reverse stroke of the press, as in most arrange
press so that a. strip of work material is both fed into and
ments of the prior art. Still further, the present inven
tion provides means whereby identical roll release adjust
drawn from the die space of the press. Occasionally, as
ments may be produced at opposite sides of a press with
when the stamping operation is such that no continuous
out the usual “cut-and-try” adjustment and a given setup
strip of scrap material issues from the die space of the
may, by noting the calibration of the adjusting means, be
press, the feed maybe only by means of rolls at the side of
reproduced at a later time as required.
the press where the strip enters the die space. The prin
ciples of the present invention apply equally to either of
A single embodiment of the principles of the present
invention is illustrated in the drawing and described in
the foregoing conventional arrangements as well as in the
the following speci?cation but it is to be understood that
less usual case when a feed roll mechanism may be used
50
at only the scrap discharge side of the press.
the present invention is not limited to such embodiment
or otherwise than as de?ned in the appended claims.
It is highly desirable that the work strip, which is being
In the drawings:
:
fed to and/ or drawn from the die space by driven pres
FIG. 1 is a general front elevational view of a power
sure rolls, be released from such rolls for a predetermined
press having feed roll mechanisms at opposite sides there—
time in the cycle of press operation to permit the die
mechanism to perform its work upon the strip. More 55 of for feeding strip material through the die space of the
press and showing, in combination with the press and the
particularly, after the work strip is fed to a proper or an
roll feed mechanisms, one form of the roll lifter actuating
approximate point or position for a stamping operation,
means of the present invention;
and after the movable element of the die has begun its
FIG. 2 is a side elevational view of the apparatus of
approach to the stationary die member, it is desirable 60
FIG. 1;
that the work strip be released from the feed rolls so that
FIG. 3 is a fragmentary view taken in the same direc
the die mechanism itself may take over and perform
tion as FIG. 2 but on a substantially larger scale showing
the ?nal and accurate strip locating function which is
the eccentric mechanism of the roll lifter actuating means
commonly a part of the operation of the die mechanism,
of the present invention;
particularly in the case of progressive dies.
65
FIG. 4 is a cross-sectional view of the upper portion of
This release of the strip from the rolls need be only of
the structure of FIG. 3 taken on a vertical central plane;
su?icient duration to permit the strip locating pins of
and
the die mechanism to engage a work piece and accurately
FIG. 5 is a fragmentary side elevational view partly in
locate the same relative to the die mechanism. In gen
cross section showing one form of feed roll driving
eral, the rolls may be caused to again grip the work strip 70 means;
at some time prior to the complete release of the work
FIG. 6 is a similar view showing the timing arrange
piece by the punch or stripper elements or the locating
ment for the feed roll driving means; and
aoearso
3
FIG. 7 is a fragmentary vertical cross-sectional view
taken along a vertical plane extending through the axes of
the feed rolls of one of the roll feed units showing the
drive thereof.
Like characters of reference denote likeparts through
out the several ?gures of the drawings. The power press
illustrated in FIGS. 1 and 2 is of the conventional straight
side type having a bed 1t}, side columns 11 and 12 and a
ll
ployed.
Obviously the angular degree of such uni-di
rectional rotation of a feed roll for each cycle of press
operation depends upon the eccentricity of T-bolt 67,
which comprises the crank pin, as determined by the
setting of screw 68, which eccentricity in turn deter
mines the length of the working stroke of rack 72.
However, regardless of the amount of angular feed of
the feed roll or feed rolls, such feeding rotation always
occurs during exactly 180* degrees of rotation of the
crown or superstructure 13. A crankshaft 14 journaled
in the crown 13 is provided with the usual cranks 15 for 10 main shaft 14 of the press since the rack 72 moves
downwardly during 180 degrees of main shaft rotation
driving a vertical slide 16 by way of connections 17. Of
and upwardly during the other 180‘ degrees of main shaft
course the crankshaft may in some instance comprise an
rotation. In order to feed the strip with no possibility
eccentric or other shaft for reciprocating the slide 16 and
may be referred to more generically as a main shaft.
of interference with the actual pressing portion of the
sired lengths of stock for each cycle of press operation
templated herein, as illustrated in US. Patent No. 2,268,
0152 to Miller, dated December 30*, 1941
In FIG. 1 the roll feed mechanism at the feed side 15 cycle of operation the crank disc 65 is normally adjusted
so that feeding movement occurs during the last 90* de
of the press is designated generally by the numeral 2!)
grees of upward movement of the press slide or ram
and the roll feed mechanism at the scrap discharge side of
and the ?rst 901 degrees of downward movement.
the press is designated generally by the numeral 21. These
This timing of the feeding may be adjusted within
mechanisms are ‘interconnected by a cross shaft (not
certain limits by means of the slots '61 and screws 63
shown), at the rear of the power press for synchronous
shown in FIG. 6 but whatever this adjustment may be
rotation of their ‘feed rolls, this structure being convention
the total ‘feeding time will still occupy exactly 180 de
al and substantially as illustrated in Patents No. 1,858,403
grees of the press cycle. For instance, if the feeding
and 1,947,015, referred to above.
is adjusted to commence 110* degrees before top dead
In the present instance the rolls of the feed roll mechan
center of the main shaft rotation, then such feeding
isms 20 and 211 are driven by a crank connection shown
will continue until 70 degrees after top dead center. In
fragmentarily vat 2.3 in FIG. 1 which connects down
other words, the feeding period will always be exactly
wardly with the feed roll mechanism '21 at the discharge
one half of the angular extent of rotation of the main
side of the press, likewise in a conventional manner,
shaft 14.
generally as illustrated in Littell Patent No. 1,947,015,
The numeral 124 designates generally an actuator for
dated February 13, 1934, wherein the drive to the feed
a scrap cutter arrangement associated with the discharge
rolls is by way of a rack mechanism and an overrunnin-g
feed roll mechanism '31, this being likewise a conventional
clutch.
adjunct of feed roll mechanisms of the general type con
A representative mechanism for feeding various de
will now be described with particular reference to FIGS.
5, 6 and 7, although ‘it is to be understood that such
means for intermittently rotating the ‘feed rolls for this
purpose are well known in this art and the instrumentali
ties illustrated in FIGS. 5, 6 and 7 are substantially the
The feed roll mechanisms 2%‘ and 211 are conventionally
provided with rock arms designated 26 and 27, respec
tively, which, when pressed downwardly from the posi
tions illustrated in FIG. 1, separate the feed rolls to
The feed
rolls are normally resiliently biased into sheet gripping
engagement. The details of construction and operation
of the feed roll mechanism lifting devices which are
operated upon by the arms 26 and 27 are conventional
same as disclosed in Littell Patent 1,947,015 and are 40 release the sheet passing between the same.
illustrated and described herein merely to render the dis
closure complete.
Referring particularly to FIGS. 5 and 6, a disc 69 is
?xed to a reduced end of main drive shaft 14» and has
circumferentially extending arc-uate slots ‘61. Screws 63
pass through slots 61 and thread into a crank disc 65
whereby the latter is normally ?xed coaxially to mount
ing disc 60 but is angularly adjustable relative thereto by
loosening screws 63.
As shown in FIG. 5, crank disc 65 has a diametral
T-slot 66 which receives the head of a T-bolt 67 and
the latter is adjustable along slot 66 by means of a
and may be similar to those illustrated in the Letters
Patent referred to in the preamble hereto.
The present invention is concerned with the means
for imparting downward movements to the rock arms
26 and 27 from the drive mechanism of the power press
and for readily controlling and adjusting such movements
to secure roll separating movements of precisely regu
lated duration and which begin and end at independently
screw device 68 whereby the eccentricity of the axis of
T~bolt 67 is adjustable relative to the axis of crank disc
65, the latter being coaxial with respect to mounting disc
6% and the main drive shaft 14 of the press.
A rod member 70 has a bearing ?tting '71 at its upper
predetermined points in the cycle of press operation.
A pair of eccentric mounting shafts designated 38’ and
end which is pivoted on the shank of T~bolt 67 and the
other end of rod 70 comprises a rack 72 in mesh with
a pinion '73 which is mounted upon a cross shaft 74
tation with the crankshaft or main shaft 14 of the press
which extends transversely of the press rearwardly of
connect crankshaft 14 or main shaft with the eccentric
shafts 311 and 31 as shown in FIG. 1. This connection
may be e?ected by means of a gear train or other power
the feed roll unit or units, depending on whether one or
two such units are employed. The mounting of pinion
73 on cross shaft 74 is by way of an over-running or
one way clutch of any desired type, such as that shown 65
311 are mounted in the opposed side walls of the hollow
side columns 11 and 12, respectively, for free rotation.
The shafts 3t} and 31 are arranged for synchronous ro~
and 'with each other, in the present instance, by chain
and sprocket connections 32 and 33, respectively, which
transmission means.
The means operating between the eccentric shafts 3i}
and 311 and the roll separating arms 27 and 26, respec
in FIGS. 10 and 11 of Littell Patent 1,947,015, so that
tively, are the same at opposite sides of the press and
reciprocation of rack 72 in one direction causes rotation
a detailed illustration and description of one suffices for
of cross shaft 74 whereas reciprocation of the rack in
both. Referring particularly to FIG. 4, an eccentric
tion of pinion 73‘ does not rotate cross shaft 74.
Referring to FIG. 7, cross shaft 74» is connected to a 70 member 35- is mounted at the outer end of shaft Pill for
rotatable adjustment thereon and in the present instance
lower feed roll shaft 75 of each of the feed roll mecha
the eccentric member 35- abuts at its inner faces against
nisms 20 and 21, or of one such mechanism if only one
an enlargement 36 on the eccentric shaft 369. The outer
is used, by meshing helical gears 77 and 78, to impart
portion of the member 35 is provided with an annular
synchronous intermittent uni-directional rotation to both
feed roll shafts 75, if two such units are being em 75 enlargement 317 which has an internal beveled face 35.
3,099,180
5
An annular member 39 is keyed to the outer end of
each of the shafts 30 and 31 as at 40‘ and has a beveled
external periphery "42: which ?ts the internal bevel 33
of eccentric member 35.
When the parts are in oper
ating condition a nut 43 which engages a threaded outer
end of eccentric shaft 39 bears against annular member
39 to clamp the same .and the eccentric member 35
between shaft enlargement 36 and nut 43‘ to hold the
‘6
ably calibrated ‘as at 58 which makes it possible to dupli
cate settings of the eccentric members at opposite sides
of the press and facilitates reproducing a given setting
from time to time for a given manufacturing setup.
We claim:
1. In combination with a power press, feed rolls
adapted to feed sheet material thereto, a mechanical drive
connection between said power press drive means and
beveled surfaces 38 and 412 in secure engagement. Ec
said feed rolls for rotating the latter intermittently be
centric member 35 has an eccentric external peripheral 1O tween material pressing portions of operating cycles,
portion 45' which is thus secured‘ in a predetermined
means for adjusting said drive connection to vary said
angular position relative to eccentric shaft 39.
A radial anti-friction bearing 46 is mounted upon the
eccentric peripheral portion 45 of eccentric member 35
intermittent rotation to adjust the length of material
thus fed between each operating cycle, and means opera
ble to release the roll feed from sheet material engage
and an eccentric strap 47 is mounted upon the external 15 ment for predetermined independently adjustable time
periphery of the anti-friction bearing 46. If the angu
lar relationship of the eccentric member 35 relative to
shaft 30 is to be adjusted, nut 43‘ is loosened slightly and
periods between feeding cycles comprising a roll release
shaft driven from said power press in timed relation
with operating cycles thereof, an eccentric on said shaft,
eccentric member 35 is rotated relative to shaft 30‘ and
and means connecting the same with said release means
annular member 39, which may be accomplished conven 20 for opera-ting the latter, said eccentric including means for
iently by means of a wrench engaging in spanner holes 50
angularly adjusting the same on said shaft for varying the
of the annular enlargement 37 of the eccentric member.
timing of the release operating means with respect to the
The foregoing changes of the top dead center of the
press operating cycle, said connecting means including
eccentric member 35 relative to the top dead center of
means for adjusting the effective length thereof to vary
the drive shaft or crankshaft 14» of the press and thus, 25 the relative duration of the release period.
I
in conjunction with the adjustable connection mechanism
about to be described, determines the beginning and end
ing points of the separation of the feed rolls and thus
determines both the duration and the timing of such
separation.
If these two top ‘dead centers be set to occur simul
taneously, then the roll separation will begin and end
at equal angular distances from the bottom of the press
2. In combination with a power press, feed rolls
adapted to feed sheet material thereto, a mechanical drive
connection between said power press drive means andv
said feed rolls for rotating the latter intermittently be
30 tween material pressing portions of operating cycles,
means for adjusting said drive connection to vary said
intermittent rotation to adjust the length of material thus
fed between each operating cycle, and means operable
stroke, whereas by adjusting the angular position of the
to release the roll feed from sheet material engagement
eccentric member 35 the relative points of occurrence of 35 for predetermined independently adjustable time periods
the beginning and ending of the roll separation may be
between feeding cycles comprising a roll release shaft
varied at will. In effect, adjustment of the eccentric 35
driven from said power press in timed relation with
varies the location of the midpoint of the angle which
operating cycles thereof, an eccentric on said shaft, and
represents the roll separation period, while adjustment of
means connecting the same with said release means for
the following play connection mechanism varies the ampli 40 operating the latter, said eccentric including means for
tude of the angle by varying the effective length of the
angularly adjusting the same on said shaft for varying
play connection so that by joint adjustment of the two
the timing of the release operating means with respect
devices any beginning and ending points of roll separa~
to the press operating cycle, said connecting means in
tion may be selected.
cluding a play connection, and means for adjusting said
Referring particularly to FIG. 3, the eccentric strap 45 play connection to vary the duration of the release period.
47 has a downwardly extending internally threaded sleeve
3. In combination with a power press, independently
50 and the roll separating arm 27 is pivotally connected
selective roll feed mechanisms at opposite sides thereof
to an upwardly extending eye~bolt 51 which terminates
driven synchronously therefrom and adapted to feed
upwardly in a hollow sleeve portion 52. A screw 53
sheet material intermittently thereto between material
threads into sleeve portion 50‘ and has an enlargement 54 50 pressing portions of operating cycles, said roll feed
which is adapted to abut the upper end of hollow sleeve
mechanisms including means operable to release the roll
portion 52 in certain phases of operation, as will pres
feeds from sheet material engagement for predetermined
ently appear. Screw 53 has ‘a further lower stem por
adjustable time periods between feeding cycles, roll re
tion 55 which merely slides in the upper end of hollow
sleeve portion 52.
lease shafts at opposite sides of said press driven syn
55 chronously therefrom in timed relation with operating
By loosening a lock nut 54 screw 53 may be threaded
cycles thereof, eccentric on each of said shafts, and
into sleeve portion 50 a greater or lesser amount and as
means connecting the same with said release means for
screw 53 threads upwardly into ‘sleeve portion 50‘ the
operating the latter, said eccentrics including means for
enlargement 54' moves farther upwardly from the upper
angularly adjusting the same on said shafts for varying
end of enlarged sleeve portion 52. Thus more of the 60 the timing of ‘the release operating means with respect
to the press operating cycle.
downward movement of the eccentric strap 47 is used
up idly in the play connection before the enlargement
54 presses downwardly against the upper end of enlarged
sleeve portion 52.
4. In combination with a power press, independently
selective roll feed mechanisms at opposite sides thereof
driven synchronously therefrom and adapted to feed
Since downward movement of the arm 26 or 27, as the 65 sheet material intermittently thereto between material
case may be, releases or separates the rolls, the period
of roll release will be greater or less as the enlargement
54' is adjusted upwardly and downwardly. This adjust
ment is correlated with angular adjustment of the ec
pressing portions of operating cycles, said roll feed mecha
nisms including means operable to release the roll feeds
from sheet material engagement for predetermined ad—
justable time periods between feeding cycles, roll release
70 shafts at opposite sides of said press driven synchronous
centric member 35 as described above to establish any
independently selected beginning and ending points of
roll separation.
ly therefrom in timed relation with operating cycles
thereof, eccentrics on each of said shafts, and means
connecting the same with said release means for operat
As will be noted from FIG. 3, the face of each of the
ing the latter, said eccentrics including means for angu
enlargements 37 of the eccentric members 35 are prefer~ 75 larly adjusting the same on said shafts for varying the
3,099,1s0
.
8
‘I .
timing of the release operating means with respect to the
press operating cycle, said connecting means including
means for adjusting the effective length thereof to vary
the relative duration of the release period.
5. In combination with a power press, independently
selective roll feed mechanisms at opposite sides thereof
driven synchronously therefrom and adapted to feed
angularly adjusting the eccentric relative to said shaft
for varying the timing of the release operating means
with respect to the press operating cycle, said connecting
means including means for adjusting the effective length
thereof to vary the relative duration of the release period. _
9.111 combination with a power press, feed rolls
adapted to feed sheet material thereto, a mechanical drive
connection between said power press drive means and said
feed rolls for rotating the latter intermittently between
nisms including means operable to release the roll feeds 10 material pressing portions of operating cycles, means for
adjusting said drive connection to vary said intermittent
from sheet material engagement for predetermined ad
rotation to adjust the length of material thus fed be
justable time periods between feeding cycles, roll release
tween each operating cycle, ‘and means operable to re
shafts at opposite sides of said press driven synchronously
lease the roll feed from sheet material engagement for
therefrom in timed relation with operating cycles thereof,
sheet material intermittently thereto between material
pressing portions of operating cycles, said roll feed mecha—
eccentrics on each of said shafts, and means connecting 15 predetermined independently adjustable time periods be
tween feeding cycles comprising a roll release shaft driven
the same with said release means for operating the latter,
from said power press in timed relation with operating
said eccentrics including means for angularly adjusting
cycles thereof, an eccentric adapted to be driven by said
the same on said shafts for varying the timing of the
shaft, means connecting the eccentric with said release
release operating means with respect to the press operating
means for ‘operating the latter, selectively releasable fric
cycle, said connecting means including a play connection,
tion clutch means between said shaft and said eccentric
and means for adjusting said play connection to vary the
duration of the release period.
for angularly adjusting the eccentric relative to said shaft
for varying the timing of the release operating means
6. In combination with a power press, feed rolls
with respect to the press operating cycle, said connecting
adapted to feed sheet material thereto, a mechanical
drive connection between said power press drive means 25 means including a play connection, and means for ad
and said feed rolls for rotating the latter intermittently
justing said play connection to vary the duration of the
between material pressing portions of operating cycles,
release period.
means for adjusting said drive connection to vary said
intermittent rotation to adjust the length of material thus
fed between each operating cycle, and means operable
to release the roll feed from sheet material engagement
10. In combination, a power press having a pair of
side columns, a slide reciprocable therebetween, a main
for predetermined independently adjustable time periods
between feeding cycles comprising a roll release shaft
driven from said power press in timed relation with op
erating cycles thereof, an eccentric on said shaft, play
connection means between the eccentric and said release
means for operating the latter, and means for adjusting
the play connection means to vary the relative duration
of the release period, said eccentric including means for
angularly adjusting the same on said shaft for varying
the timing of the release operating means with respect
to the press operating cycle.
shaft journaled above said slide and rotatable to recipro
cate the same, independently selective roll feed mech
anisms disposed adjacent to said side columns at oppo
site sides of said press and driven intermittently syn
chronously from said main shaft for feeding sheet ma
35 terial to said power press between pressing operations,
said roll feed mechanisms including means movable to
release the same from sheet material engagement for pre
determined adjustable time periods between feeding op
erations, roll release shafts journaled in each of said
side columns and having portions within the same be
neath said main shaft, drive means connecting said main
shaft and said roll release shafts for synchronous rota
tion, an eccentric on each of said roll release shafts
7. In combination with a power press, independently
extcriorly of said side column, and means connecting
selective roll feed mechanisms at opposite sides thereof
driven synchronously therefrom and adapted to feed sheet 45 said eccentrics ‘and said roll feed releasing means for
operation of the latter in timed relation with respect to
material intermittently thereto between material pressing
said power press main shaft.
portions of operating cycles, said roll feed mechanisms in
11. In combination, a, power press having a pair of
cluding means operable to release the roll feeds from sheet
side columns, a slide reciprocable therebetween, a main
material engagement for predetermined adjustable time
periods between feeding cycles, roll release shafts at op 50 shaft journaled above said slide and rotatable to re
posite sides of said press driven synchronously therefrom
in timed relation with operating cycles thereof, eccentrics
on said shafts, play connection means between the ec
centrics and said release means for operating the latter,
and means for adjusting the play connection means to vary
the relative duration of the release period, said eccentrics
including means for angularly adjusting the same on said
shafts for varying the timing of the release operating
means with respect to depress operating cycle.
8; In combination with a power press, feed rolls
adapted to feed sheet material thereto, a mechanical drive
ciprocate the same, roll feed mechanism disposed ad
jacent to one of said side columns, a mechanical drive
connection between said main shaft and said roll feed
mechanism for driving the latter intermittently between
pressing portions of operating cycles of said press, means
for adjusting said drive connection to vary said inter
mittent drive to adjust the length of material thus fed
between operating cycles, said roll feed mechanism in
cluding means movable to release the same from sheet
material engagement for predetermined adjustable time
periods between ‘feeding operations, a roll release shaft
journaled in said side column and having a portion with
said feed rolls for rotating the latter intermittently between
in the same beneath said main shaft, drive means con
material pressing portions of operating cycles, means for
necting said main shaft and said roll release shaft ‘for
adjusting said drive connection to vary said intermittent 65 synchronous rotation, an eccentric on said roll release
rotation to adjust the length of material thus fed between
shaft exteriorly of said side column and means for angu
each operating cycle, and means operable to release the
larly adjusting the same relative to said roll release
roll feed from sheet material engagement for predeter
shaft for varying the timing of the roll feed release
mined independently adjustable time periods between
feeding cycles comprising a roll release shaft driven from 70 means relative to said main shaft, means connecting
said eccentric ‘and said roll ‘feed release means for opera
said power press in timed relation with operating cycles
tion of the latter from the former, and means for ad
thereof, an eccentric adapted to be driven by said shaft,
justing the effective length of said connecting means to
means connecting the eccentric with said release means
vary the duration of the release period.
for operating the latter, selectively releasable ‘friction
(llieferenccs on foiiowing page)
clutch means between said shaft and said eccentric for
connection between said power press drive means and
3,099,180
10
References Cited in the ?le of this patent
UNITED STATES PATENTS
402,240
831,765
854,706
960,464
1,075,535
1,113,699
Hayes ________________ __ Apr. 30, 1889
Beyer ________________ __ Sept. 25, 1906
Eden ________________ __ May 21, 1907
Wtiis _________________ _._ June 7, 1910
Baker ________________ __ Oct. 14, 1913
Simmons _____________ __ Oct. 13, 1914
1,719,195
1,858,403
Robertson ____________ __ July 2, 1929
Littell _______________ __ May 17, 1932
1,947,015
2,265,332
2,338,596
2,468,620
2,613,739
2,751,984
2,756,994
Littell ________________ __ Feb. 13, 1934
Woodington ___________ __ Dec. 9, 1941
Pit-t et a1. _____________ __ Jan. 4, 1944
Gilbert =et a1. __________ __ Apr. 26, 1949
Lefere _______________ __ Oct. 14, 1952
Kuhl ________________ __ June 26, 1956
Wiig ________________ __ July 31, 11956
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