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Патент USA US3022737

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3,022,727
P. ZERNOV
wEB FEED DEVICE FOR ROTARY PRINTING PRESS
3 Sheets-Sheet 1
Filed Julyv 11, 1960
Feb. 27,_ 1962
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BY
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Feb. 27, 1962
P. ZERNOV
3,022,727
WEB FEED DEVICE FOR ROTARY PRINTING PRESS
Filed July 11, 1960
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3,022,727
P. ZERNOV
WEB FEED DEVICE FOR ROTARY PRINTING PRESS
Filed July 11, 1960
s Sheets-Sheve’r. :s
INVENTOR.
per-s2 Zea/vb /
E?ZZEZ?
States
Patented Feb, 2?, i362
2
i
driven carrier rolls and the web so that the rolls regu
3,022,727
WEB FEED DEVICE FGR ROTARY
PRINTING PRESS
Peter Zernov, Milwaukee, Wis., assignor to Mercury En
gineering Corporation, Milwaukee, Wis., a corporation
late the speed of the web. By furnishing some drive assist
by means of the driven carrier rolls, and thereby relieving
the Web of carrying and driving these inertia and friction
loads of the machine, it is possible to be able to con
sistently print on low tensile strength material such as
extensible webs of the cellophane, mylar or polyethlene
Filed July 11, 1960, Ser. No. 41,936
type, and material as light as twenty pound paper.
3 Claims. (Cl. 101-181)
By means of the present invention, power driven carrier
The present invention relates to a line of printing presses 10 rolls provide web tension and the tension is more evenly
of Wisconsin
which employ a plurality of printing cylinders over which
the web to be printed passes.
In in-line presses of the type to which this invention re
distributed throughout the line of presses.
An important aspect of the present invention is to pro
vide a line of presses having power driven carrier rolls
of the above type, in which a slip clutch is provided in the
create or establish tension in the web which is moving 15 drive before the ?rst carrier roll, by means of which
through the machine is at the entry and discharge ends
clutch only enough torque is provided to overcome the
of the line of presses. That is to say, the amount of
drag or inertia effects of the machine.
lates, for example, rotogravure presses, the only places to
tension in the web must be established at the incoming
The present invention provides a line of printing presses
and outgoing sides of the line. Developing this tension
in which a series of power driven carrier rolls are spaced
may be done conventionally in several way. For example, 20 apart throughout the line, for example, preferably one
the supply roll may be braked and the rewinder at the
roll for each printing cylinder. in this manner the tension
discharge side may pull sufficiently to create the desired
of the web is maintained in separate sections of the web
tension. Alternatively, power driven feed rolls may be
length. Stated otherwise, the tension of the web is main- .
used at the entry and discharge sides of the line. In any
tained between each power driven carrier roll and its
event, Where several presses are used in line, the web in 25 adjacent printing cylinders. Thus the several lengths of
the presses is of considerable length, being as much as
Web, through which the tension is separately maintain
thirty feet long between each pair of adjacent presses.
able, are relatively short as compared to the entire length
of the web in the entire line of presses. As a result of the
shorter length of web which must be controlled as to
tension, it is possible to get a much faster response or
This length of web creates di?iculties in properly dis
tributing the tension throughout the length of the web,
particularly in the middle portion of the web, that is, in
the more centrally located presses. Stated otherwise, in
conventional press lines, 'very little tension may be left in
the more central portion of the web length.
in in-line presses, the entire line eventually can be ad
justed to operate at a fairly balanced condition and when 35
this equilibrium condition exists, the various printing cyl
correction for each individual printing cylinder. Regard
lessot the signalling or correcting devices used, they can
perform their correction more quickly because they only
need to vary the web length between two adjacent web
decks.
The arrangement provided by this invention thus.
‘
ermits a faster correcting response to reestablish balanced
conditions in the line because the tension changes can
inders are in good registry. This balanced condition,
be made more quickly in these shorter web lengths.
however, is easily upset due to many variables, such as,
inter alia, web shrinkage due to the action of the driers,
Furthermore, with the above arrangement, a much
variable tension of the incoming web, variable elasticity 40 more stable press is provided because when a variation
of the web along its length, and changes in humidity and
is introduced into the line, a balanced condition will be
temperature. It is then necessary to reestablish the op~
reestablished faster. This is possible because there has
crating equilibrium of the presses, and the length of time
been provided several key references, one between each
required to do this is re?ected in the amount of mis
printing station, to effect constant velocity throughout
registry and the length of time during which this mis 45 the web length and permit each printing unit to ?nd its
registry occurred.
balanced condition between each set of power driven car
Furthermore, due to even very slight dillerences in the
circumferential size of the various printing cylinders ar
the one adjacent to it.
rayed in an in-line press, there exists a difference in the
rier rolls. One printing unit will not materially effect
These and other objects and advantages of the present
elocity of the web at the different printing couples, that
is, at the different locations where the printing actually
takes place in the line. This difference in printing cyl
inders circumferential sizes exists notwithstanding the
painstaking efforts to produce cylinders of identical sizes.
For example, the dimensions of the best pairs of matched 55
ence being had to the accompanying drawings, in which
FIGURE 1 is an elevational side view, taken from
the operator’s side, of a portion of a printing press line,
certain parts shown as being broken away, in section or
removed, and the view being more orless a‘schematic
cylinders may vary as much as three thousandths on their
showing;
invention will appear as this disclosure progresses, refer
'
.
'
circumference. This variation in web velocity through
FIGURE 2 is a detailed elevational view of a portion
out its length is possible because of the variation in tension
of the machine shown in FIGURE 1, certain parts being
of the web coming into and leaving the point of printing.
broken away;
,
j
.
In accordance with the present invention, a plurality of 60
FIGURE 3 is a plan view of the machine shown in
printing presses have been provided in which the velocity
FIGURE 2, certain parts being in section or broken away;
of the web as it moves through the line of presses is main
FIGURE 4 is a fragmentary sectional view taken along
tained constant throughout its length.
line 4—4 in FIGURE 1, but on an enlarged scale;
FIGURE 5 is a detailed elevational view taken gen
More particularly, the line of presses provided by the
present invention has a series of power driven carrier rolls 65 erally from line 5~—5 in FIGURE 4;
FIGURE 6 is a view taken generally along the line
for supporting the web, which rolls are driven at an ideal
6—6 in FIGURE 7, and;
or average velocity that is desired to be maintained in the
FIGURE 7 is a sectional view taken along line 7-7
line. The driven carrier rolls provided by the present
in FIGURE 6.
invention furnish enough drive to the web to overcome
the inherent inertia in the moving parts of the presses, and 70
Referring in greater detail to the drawings, and par
the web does not drive these carrier rolls. In other words,
, ticularly to FIGURE 1, the main trame of the press line
a delicately balanced condition is provided between the
includes the horizontally disposed pair of beams or chan
‘ 3,022,727
nels I and 2 which are arranged in parallelism. The pairs
of vertical supports 3 hold the channels 1 and 2 above
the floor F and over the several printing units A, B and
C. The channels, vertical supports and presses are all
secured together as a, complete line.
>
Only three printing units have been shown, but as many
4
22 are similar and a description of one set of each is
deemed to be su?icient. These rolls are also mounted
between the channels 1 and 2 as will be more fully
described. It will be seen that a power driven roll is
located between each adjacent pair of printing cylinders
and one before the ?rst cylinder Ca and one after the
as eight are often used together in a single in-line rot0~
last cylinder Cc.
gravure operation, and the invention is not limited to use
As will be fully described, the ?rst roll R1 is driven
with any particular number of presses.
from the main power source, in the form of an electric
Each of the presses A, B and C are substantially 10 motor M, and all of the subsequent rolls are driven from
identical for purposes of this disclosure and each have,
a common line of power and right angle gear boxes. Thus
respectively, a printing cylinder Ca, Cb, and Cc which
all of the rolls R1 to R4 are driven together in unison.
are suitably journalled for rotation in the side walls of
Referring in greater detail to the ?rst roll R1, an air
their respective presses in the well known manner. ‘ Each
operated slip clutch 25 is mounted on the operator end
of the printing cylinders may be driven from a common 15 of the roll R1, as‘ clearly shown in FIGURE 4. More
drive shaft 5 and with which they each have an adjust
particularly, a stub shaft 26 is fastened by pin 27 to the
able running register 6. The cylinders are thereby each
shaft 28 of the roll R1 and forms an extension thereof.
adjustable relative to the drive shaft and to one another
Shaft 26 is journalled in the bearing block 29 secured
for registry purposes.
by bolt means St) to channel 1.
Each of the presses also has an ‘impression roll 7 adja 2-0
The clutch 25 is of conventional design and it is
cent to its printing cylinder and the actual printing is
believed sufficient to say that shaft 26 is secured to one
done on the Web W as it passes between the printing cyl
of its clutch elements, and a sleeve 31 is secured to the
inder and the impression roll. A nip printing couple
other of its clutch elements. i Thus the shaft 26 and
is formed at these printing locations by the impression
sleeve 31 are engageable and disengageable with one
roll which ?rmly presses the web against the cylinder.
25 another. , A clutch gear'32 is rigidly secured to sleeve
A conventional overhead drier 8 having various sup
31 and is in constant mesh with‘ gear: 31a supported on
shaft 31b and ?xed to the timing pulley Sic. An endless
press and the length of the web between adjacent print
timing belt 33 is trained over this pulley.
ing cylinders may be about thirty feet in length. Thus in
Power ‘is transmitted to the clutch from the power
a line having eight presses, a web length of 250 to 300 30 driven center roll 16 via a timing pulley and the belt 33
feet within the complete line or" presses is not uncommon.
trained thereover. Idler pulleys (not shown) to regulate
Other conventional idler rolls iii, 11 and 12 are pro
belt tension may be utilized in the conventional manner.
vided for supporting the web as it moves through the line.
In this manner the drive for the carrier rolls is taken
At the entry side of the ?rst press A, the web passes
directly from the feed unit.
from a supply roll and over various pre-feed rolls (not
The clutch 25 is set so that only a predetermined speed
.shown) and then over the guide roll 13, and into the
is imparted to the carrier rolls R1 to R4. By means
conventional infeed means if“. ' This feed means includes
of this clutch only enough torque is provided to the
- porting rollers for the web may also form part of each
a pair of idler rolls 14- and 15 between which is a center
carrier rolls to overcome mechanical losses in the line
driven roll 16 having a gear 16:; secured to its shaft that
due to inertia, friction and other causes. Depending on
is driven from the main drive of the machine through 40 the feed characteristics desired from the driven carrier
Worm 165 on shaft 5.
This feed means acts to pull the
rolls, and whether or not feed means are used at the
web from the supply roll (not shown) and feed it at a
entry and discharge sides of the line, the carrier rolls
precisely metered rate.
may or may not be of the positive nip type. Several
At the discharge end of the press line is located an
variations may be used. For example, a positive nip
outfeed means for the web in the form of nip rolls 17 45 may be provided for each carrier roll, no nip may be
and 18, between which is located the driven feed roll 19.
necessary for any of the carrier rolls, or a nip may be
The infeed means and the outfeed means act to create
provided for only some of the carrier rolls.
tension in the web located in the press line. However,
In the illustration of the invention shown here, a positive
as previously indicated, this general tension may also
nip is provided for each carrier roll, as will appear.
be created in different ways and speci?c feed means may 50
A rubber covered nip roll 4%‘ is provided for cooperation
not be necessary. For example, the supply roll (not
with roll R1 and is adjustably mounted between channels
shown) at the entry side of the press line may have means
1 and 2 for shifting between a nipping or closed position
for creating a braking action; the rewinder (‘not shown)
and a throw-out or open position.
at the discharge side of the press line may be controllably
As shown in‘FIGURES '2 and 3, the nip roll 40 is
driven suf?ciently to provide the desired tension. In any 55. urged to the nipping position by a pair of air operated
event it is necessary to provide means for creating, and
members 44, one at each end of roll 49, members are
maintaining tension at the entry and discharge sides of
securely mounted to the main frame by bracket 45 and
the press line.
.
each have a shiftable actuating rod 46 extending there
As the‘web leaves the feed‘ roll it passes through con
from. The nip roll 49 is swingably mounted on a pair
ventional dancer roll unit D which controls and main 60 of arms 47, one at each end of the roll (only one arm
tains a certain tension in the web. at this location.
is shown), which arms are pivoted at their upper end
It can be seen that in the abovelline ‘of presses there
on pins 48 to their respective channels. Actuating rods
are a considerable number of moving parts, many of
46 are pivoted to their respective arm '47 and when
which have not been described, which have considerable
extended act to swing the roll 4!) to the nipping position.
inertia and create friction losses, and'which are con 65. Member 44 has a spring 44a by means of which the
ventionally driven by the web. This imposes a heavy load
roll 40 is spring biased to the open position, the mem
on the web and variations in tension in the length of the
bers 44 being air operated in only one direction.
Web within the line of presses.
A manually operated handle 59 is used to actuate an
In accordance with the present invention, power driven
air valve 51,to thereby cause air to be admitted to or
carrier rolls are provided for the web, which rolls are 70 released from members 44 via conduit 52 and 53, a central
spaced apart within the line of presses. The ?rst of such
valve 54 regulated by the knob 55 is used to meter the
rolls R1 is located just after the dancer assembly and is
air from the supply line 56 to the control valve 51. The
rotatably mounted between the channels '1 and 2.
operator can readily adjust the nippingpressure on roll
The other power driven carrier rolls R2, R3. and R4,
R1 and also completely open the nip roll 46.
and their respective rubber covered nip rolls 20, 21 and 75
The; structure, drive and operation of the other carrier
3,022,727
6
5
entry and discharge sides of each printing cylinder is
rolls R2, R3, and R4 and their nip rolls will now be
more nearly equalized.
described, reference being made only to the second roll
The driving effect of the carrier rolls is su?icient to
R2 but it being understood that the other rolls are similar.
relieve the web of a considerable load otherwise imposed
Referring in particular to FIGURE 3, the shaft 60
upon it.
of R2 is journalled in the pillow blocks 61 and 62 se
The velocity of the web is maintained constant through
curely mounted on channels 1 and 2, respectively. A
its length and can be accurately controlled.
bevel gear 63 is secured to the outer end of shaft 60.
A much faster correcting response is possible and a
The drive between the carrier rolls is as follows. A
more stable operating press is provided.
right angle gear box 64 is located at the back end (as
Various modes of carrying out the invention are con
viewed in FIGURE 1) of the roll R1, that is, on the 10
templated as being within the scope of the following
side opposite to the operator’s side. A drive tube 65
claims particularly pointing out and distinctly claiming
extends from this box 64 to another right angle gear box
the subject matter which is regarded as the invention.
66 located at the rear end of roll R2. Another drive
What is claimed and desired to be secured by'Letters
tube 67 extends from box 66 to a third right angle gear
Patent is:
box 68 located at the end of roll R3. Suitable couplings
1. A printing press line having a plurality of printing
70 connect the drive tubes to the gear boxes.
cylinders and an impression roll for each cylinder which
Within each of the gear boxes is a bevel gear 71
forms a nip printing couple therewith and through which
which is in constant mesh with the bevel gear carried
a Web is adapted to pass, said lineralso having means
on the end of each of the adjacent carrier roll shafts.
The gear 71 is ?xed to a shaft 73 rotatably mounted in 20 adjacent its entry and discharge sides for creating ten
sion in the web in said line, a series of power driven
the box, which shaft is ?xed to the drive tubes extend
carrier rolls spaced apart in said line for at least par
ing from each end thereof, by key means 74. The vari
tially driving said web, means drivingly connecting said
ous drive tubes and the shafts 73 may be considered as
carrier rolls together so as to drive them in synchroniza
tion with one another, and a slip clutch for driving one
power driven carrier roll in the line whereby the maxi
mum velocity of said carrier rolls is limited to cause said
feed roll means 16.
rolls to deliver only a predetermined amount of torque
The rubber covered nip roll 20 is mounted by its dead
to said web.
shaft 20a supported on the channels 1 and 2. A han
2. In a printing press line having a plurality of print
dle means 20b is secured to the end of shaft 201: for 30
a single drive shaft.
The carrier rolls are thus all positively in synchroniza
tion with one another, deriving their power from the
ing cylinders through which a web is fed, an impression
roll for each of said cylinders and forming a nip print
ing couple therewith, infeed means for the web at the
entry side of said line, outfeed means for said web at
the discharge s‘de of said line, said infeed and outfeed
means establishing tension in the web therebetween, a
oscillating the latter between nipping and open positions.
Eccentric sleeves 20:: are ?xed to the ends of shaft 20a
and these sleeves are rotatably mounted in the anti-fric
tion bearing members 20d secured to channels 1 and 2.
By oscillating the handle means 20b, the entire shaft
20b and its roller 20 are shifted bodily toward and away
from the roll R2, and by simply throwing the handle
in one direction the roller 20 is thrown off of the nip po
series of power driven carrier rolls for said web and lo
cated in spaced apart relation in said line, and drive
transmitting means for drivingly connecting said carrier
sition. The handle and eccentric arrangement is of the
over-center type and the spring 20e loads the roller in 40 rolls to said web infeed means whereby said carrier rolls
are driven by said infeed means.
the over-center position and ?rmly against the roll R2.
3. A device as set out in claim 2 including a slip
The effective length of the moment arm through which
clutch in said drive transmitting means to limit the driv
the spring acts to load the roll is the amount of eccen~
ing effect of said carrier rolls on said web to a prede
tricity of the eccentrics.
termined value.
Résumé
45
By means of the power driven carrier rolls the actual
length of the web in the line of presses is, ?guratively
speaking, broken down into several separate lengths,
which lengths are easily controlled and adjusted as to ten
sion. Not only is a more uniform tension provided 50
throughout the length of the web but the tension at the
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,581,151
1,661,209
2,809,582
Yetter ______________ .._ Apr. 20, 1926
Wolf _______________ __ Mar. 6, 1928
Crawford ___________ .__ Oct. 15, 1957
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