US2124420A - Printing press - Google Patents

Description

y 1932 c. R. KADDEL ND 2 2,124,420

PRINTING' PRESS Original Filed May 20, 1955 3 s-Sheet 1 m T N E V m CHRISTEN R K/IDD L/WD WQ/ Q: v2 .1 gal...

July 19, 1938. c. R. KADDELAND PRINTING PRESS Original Filed May 20, 1933 5 Sheets-Sheet 2 INVENTOR CHE/575M RJOIDDEL/l/VO ATTORNEY July 19, 1938. c. R. KADDELAND PRINTING PRESS Original Filed May 20, 1933 3 Sheets-Sheet 3 NE m2 INVIIENTOR CHE/5 TEN I? K/IDDELHND ATTORNEY of Fig. 1;

Patented July 19, 1938 PATENT OFFICE PRINTING PRESS Christen Rfkaddeland, Shelton,

to Harris-Seybold-Potter Company,

Conn, assignor Cleveland,

Ohio, a corporation of Delaware Original application May 20, 1933, Serial No.

Divided and this application Janu ary 24, 1935, Serial N0. 3,238 I 35 Claims. (Cl. 101-247) My invention relates to certain improved devices used in conjunction with rotary printingpresses, and more particularly relates toweb printing-presses and especially to web gravure presses printing from intaglio cylinders.

f This application is a application for patent filed May 20, 1933 Serial No. 671,992, which has now matured into'Patent No. 2,064,168.

The objects of my invention are, among other things, to provide a novel and simplified type of rotary printing-press of the type that is particularly adapted for gravure printing, though my improvements may be embodied in rotary printingpresses of various types;

'A further feature of my invention is to provide a rotary printing-press with novel means for adjusting pressure on the cylinders constituting the printing unit at each side of the press independently of the other or simultaneously as desired, whereby a separate or unitary adjustment of the coacting cylinders may be reached, which mechanism is preferably coupled with separate fluid pressure indicators arranged on one side of the press so that the pressman may readily adjust the pressures applied at either end or at both ends of the cylinder to secure a uniform pressure throughout the width of the printing unit without changing his position relatively to the press.

A further feature of my invention is the provision of novel and improved mechanisms used in conjunction with the pressure adjusting devices hereinbefore described,-whereby the impression embodied in the printing cylinder or cylinders unit may be manually raised out of printing relation, such mechanisms being also used to reestablish the required pressure from both ends of the press either separately or simultaneously to secure the range of pressure adjustments especially needed for gravure printing where various sizes of cylinders are used. I

Further objects and advantages will appear hereinafter and be particularly pointed out'in the claims, and the drawings show a preferred embodiment of my invention as applied to a web gravure rotary printing-press, but my improvements are not necessarily restricted to any particular form or type of rotary printing-press constructions. Inthe drawings, Fig. 1 is a front elevation of a web gravure printing-press embodying-my improvements, certain parts being shownin vertical section;

Fig. 2 is a side elevation looking from the right division of my pending printing cylinder of the standards Fig. 3 is an enlarged side elevation of the upper part of the press, partly in section, and also showing a diagrammatic lay-out of the fluid pressure indicating mechanism;

Fig. 4 is a detail sectional view on the line 6-4 5 of Fig. 3;

Fig. 5 is a detail sectional view on the line 5-5 -of Fig.3;

Fig. 'l is a side view partly in section on the line 10 1-1 of Fig. 1;

Fig. 8 is an enlarged sectional view on the line 8-8 of Fig. 1;

Fig. 9 is a detail sectional view on the line 9-9 of Fig.2; andv h Fig. 10 is a sectional view on the line Ill-l0 of Fi 1.

, Similar numerals refer to similar parts throughout the several figures.

Referring to the figures and more particularly to Figs. 1 and 2, the press frames II and I2 are mounted on thebase it in spaced-apart relation with the lower part of the frames II and I2 having the reentrant spaces I4 and I5 formed respectively therein to allow space for the projecting ends of the cylinder shaft when the cylinder is. removed or installed. The standards it and I1 preferably integral with the frames II and I2; afford fixed bearing supports for this cylinder shaft as shown in Fig. 1.

The press proper, preferably a web avure press, comprises the printing cylinder It, the therewith coacting resiliently covered impression cylinder 1 9 and the pressure cylinder 20 which is adapted to exert pressure on the cylinder IS. The web W is shown in Figs. 1 and 2 in tripped relation with the cylinders l8 and I9, and the cylinders l9 and 20 are illustrated in their raised position with the web W out of contact withthe printing cylinder l8.

The printing cylinder shaft 2| is driven from its left end 22- (Fig. 1) by the clutch gear 23 fastened to the shaft end 22. The right end 24 carries the mechanism for laterally shifting the I8 relatively to the press frames I l and I2 to secure proper side registration of the cylinder. The shaft ends 22 and 24 each carry similar bushings 25 that are carried in the sleeves 26 which are supported in the socketed portions l6 and I! on which fixed bear- 2l is rotatably mounted ings the cylinder'shaft within the bushings 25. The means for driving the printing cylnder l8 through its shaft 2| in-either direction will now be described: On the left side of Fig. 1 is the housing 21 in which is journalled the main drive shaft 28 actuated from any suitable source of power (not shown). Slidably keyed at left end (Fig. 7) of the shaft 28 is the clutch gear 29 adapted to removably engage with the clutch 'gear 38 mounted on the sleeve 3| which encircles the shaft 28 and is freely rotatable thereon. The inner end of the sleeve 3l'carries the bevel pinion 32 that engages the large bevel gear 33 fast to the cross-shaft 34 journalled in the housing 21. Surrounding the sleeve 3| is the bearing collar 35 carried by the bracket plate 36 secured within the housing 21. The clutch gear 29 is exteriorly grooved at 31 in which groove 31 rides the nose 38 of the bracket 33- pinned to the slidable control rod 48 that is laterally shiftable in the bracket plate 36.

Onthe right side of Fig. 7 a similar construction is shown' comprising the clutch gear 4| slidably keyed to the shaft 28 which gear 4| is adapted to removably engage with the clutch gear 42 mounted on the sleeve 43 which also encircles the shaft 28 and is freely rotatable thereon. The inner end of the sleeve 43 carries the bevel pinion 44 that engages the bevel gear 33 opposite to the bevel pinion 32. Surrounding the sleeve 43 is the bearing collar 45 carried by the bracket plate 46 secured within the housing 21. The clutch gear 4| is exteriorly grooved at 41 in which grove 41 rides the nose 48 of the bracket 49 that is pinned to the end of the control rod 48 that also slides in the bracket'plate 46 as well as the plate 36.

By this mechanism the constantly rotating drive shaft 28 will impart a rotative' movement to be exchanged in the reentrant to the cross-shaft 34 in either. direction through the large bevel gear 33 depending on whether the clutch gears 28 and 38 are operatively engaged to drive the gear 33 in one direction through the bevel-pinion 32, or whether the clutch gears 4| and '42 are operatively engaged to drive the gear 33 in the opposite direction through the bevel pinion 44. The lateral shifting of the control rod 48 through the brackets 39 and 49 determines whether one set of. clutch gears 29 and 38 or the other set of clutch gears 4| and 42 are in engagement with one another. When one set is disengaged its particular bevel pinion (32 or 44) is free to rotate on the shaft 28 through the gear 33 and is not driven by its set of clutch gears (29 and 38 or 4| and 42) which happen to be disengaged so as not to interfere with the predetermined direction of rotation to be imparted to the cross shaft 34.

Fastened to the cross shaft 34 is the pinion 58 which through a pair of idler gears and 52 drives the pinion 53 fastened to the end of the shaft 54 journalled in the housing 21 and press frame II in either direction as shown in Figs. 1, 2 and '7.

Pivoted to the press frames II and I2 are the two swinging arms 55 and 56 which support the end brackets 51 and 58 respectively in which is mounted a novel type of ink fountain and ink distribution devices adapted to be located on either side of the printing cylinder l8 as shown in Fig. 2 depending upon the direction of rotation of the cylinder l8 and also permits this cylinder without interference with the ink fountains and doctor blades by mechanism hereinafter described.

The shaft 54 imparts 'a rotary movement by bevel gears (not shown) to the adjustable shaft 59 carrying mechanism to rotate the shaft 68 which carries the cam-operated devices for reciprocating the usual doctorblade for removing '19 as shown in Fig. 1.

press frames Since this ink distribution system is the subject matter of a co-pending application, it is not necessary to describe the structural details in this case. Such mechanism is a peculiar advantage in web gravure presses such as are shown herein.

Referring to Figs. 1 and 10, the inner end of the cross shaft 34 has fastened thereto the widetoothed gear 6| of similarsize and teeth to, and in transverse alinement with, the gear 23 on the cylinder shaft 2|. Surrounding both the gear 23 and the gear 6| is the interiorly tooth gear sleeve 62 which is slidable on the gears 23 and 6| and is fastened in any predetermined position on the gear 6| by the screw-pin 63. By sliding the sleeve 62 to the left in Fig. 1, the gears 23 and 6| are thereby disconnected and the cylinder l8 may be removed from the press. In Fig. 1, the gears 23 and 6| are operatively connected to rotate the cylinder l8 in either direction by the -mechanism within the housing 21 hereinbefore described. 8

Means are provided for laterally adjusting the printing cylinder I8 in the press frames H and I2 best shown in Figs, 1 and 8: Mounted on the bracket 64 fastened to the frame |2 is the interiorly threaded'standard 65 through which passes the screw-bolt 66 having thehandle 61 fastened to its outer end. The iner end of the bolt 66 passes through the hole 68 of circular plate 69 removably held to the outer reduced end of the coupling 18 for the cylinder shaft 2| by screwbolts 1|. I

Within a socket cut in the end 69, the screw bolt 12 portion of the screw-bolt 66 projects, this screw-bolt portion 12 being of smaller diameter than the screw-bolt 66 as shown in Fig. 8. The

sleeved collar 13 carried by the bolt 12 divides adouble'set of ball bearings 14 and 15 which are held in position by the outer washers .16 and 11 within the socketed opening of the coupling 18.

in any predetermined position by the locking bolt 18 tapped into the standard 65 and bearing on the plate 88 above the bolt 66. The handle 8| is removably secured to the head of the locking bolt The coupling 18 is fastened to the end 24 of the cylinder shaft 2| by the clamping nuts 8| as shown in Fig. 1.

By these devices I have provided a ball thrust bearing for this end 24 of the cylinder shaft 2| by which the cylinder l8 may .be laterally adjusted, and at the-same time have provided means for disengaging the end 24 of the cylinder shaft 2| within the space |5 so that the cylinder I8 may be readily removed and a different cylinder installed in the press when-required.

Means are provided for. removing and installing the printing cylinder l8 that are shown in Figs. 1 and 2: Such means are duplicated on either side of the press to be mounted in the standards l6 and", and a description of one set will sufiice for both.

Such standards l6 and I1 have vertical slots 82 cut therein through which project the arms 83 of the levers 84 pivoted on the stub shafts 85 secured in the standards I 6 and H such arms being adapted to bear on the under sides of the collars 26. The lower."arms 86 of levers 84 are forked either side of' the press to rotate the bars'B'I and thereby rock the levers 84 on the shafts 85 in eitherdirection. Pivoted to the press frames II and I2 in proximity to the stub shafts 85 (Fig. 2)

are the runwaybars 99 to afford a track upon which the cylinder shaft ends 22 and 24 may roll in removing or installing a cylinder in the press. By raising the arms 82 the cylinder l8 and its shaft ends 22 and 24 will be partly lifted from its operative position in the press, and such cylinder may then be rdlled out of the press frames II and I2 on the runway bars 90. 'In installing a cylinder the reverse operation takes place, and the cylinder shaft ends 22 and 24 are lowered into their bearings on the standards It and II when the arms 83 are lowered through the slots 82 as shown more particularly in Fig. 1 where such-arm 82 are no longer in contact with the collars 26 of the cylinder shaft ends 22 and 24.

The impression cylinder I9 is removably mounted in the press by devices that are best shown in Figs. 1-5 which are duplicated on either side of the press; hence a description of one set will suffice for both: The press frames II and I2 have the cut-out portions 9| (Fig. 2) inside which the bearings of the cylinders l9 and 29 which are located as shown in Fig. 2. Mounted inside the press frames II and I2 are the slidable heads 92 held to the frames by thegibs 93 to permit the heads 92 to be raised and lowered by mechanism hereinafter to be described. The shaft 9d of the cylinder I9. (Fig. 5) has a reduced outer end 95 around which are the ball bearings 99 enclosed between the inner casing 9'8 and outer casing 99. The inner casing'9'i is removably heldto the shaft 99 by the washer 99 and the screw-bolt we tapped into the shaft end 95. The outer casing 99 bears against the hollowed-out plate E99 that is slidably secured within the guides M52 and I99 to move vertically in the head '92 for floating the cylinder 59, which plate I98 is held in alinement by the keys Mid and 895 respectively, sliding in the head 92 and guides Hi2 and Hit respectively.

A pair of screw-bolts I99 (Figs. 3 and 5) hold in place the plate ilii on either side which plate bears on the outer casing 98; a pair of screw-bolts .iil'i passthrou gh the guides E92 and 693 and are tapped into the head 92 to hold these guides in position. To limit the floating of the cylinder shaft 99 (Fig. 3), the right-hand guide 692 has slotsitt through which the screw bolts 59? pass. A bottom plate I99 bears against the bottom of the plate Hit and right guide 892, and is held to the guide I92 by a pair of tapped-in screw-bolts H9. By these devices the cylinder shaft 99 may be adjusted relatively to cylinder 29 when wear on the cylinder I 9 occurs, and the cylinder it may be removed by detaching the plate H99.

Referring more particularly go Figs. 3 and t, the shaft iii of the pressure ylinder 29 has a reduced outer end II2 around which are the ball bearings H3 enclosed between the inner casing H4 and the outer casing H9. The inner casing H9 is removabiy' held to the shaft Hi by the washer H6 and the screw-bolt Ill tapped into the shaft end H2 (Fig. 4). The outer casing M9 bears against the head 92 slidable in the gibs 93, and is removably vent oil from the reduced end I28 surrounded by the the handles Idt and held in position against the inwardly projecting lugs H8 and H9 comprising a boss on the head 92 by the hollowed-out plate I2I fastened to this boss by the screws I22 (Fig. 4). The shaft III projects through the plate I2I as shown. Fastened to the outer side of the head 92 is the removable plate I29 to preball bearings II8 from being scattered on the press frames II and I2.

Means are provided for exerting pressure on the cylinders i9 and 20 according to printing requirements, which pressure is adjusting either separately at either side of the press or simultaneously at both ends of the cylinders, coupled with devices for raising these cylinders I9 and 29 out of con-, tact with the cylinder I8, all of which is best shown in Figs. 1-3, 6 and 9.

Such mechanisms are duplicated on either side of the press and a description of one set will sutlice for both. In the top of the heads 92 are sockets I24 covered by the inverted cup-shaped cover plate I25 that is'fastened to the head 92. Extending through the hole I29 in the plate I29 is the vertically extending bar I21 having the ball bearings I29 held between the inner casing I and outer casing I3I fitted within the plate I25 (Fig. 3). The screw-nut I32 threaded on the tip of the bar I21 bears against the inner casing I30 and holds the press-frames II and I2 is the cross-shaft it! which carries spiral gearitt adjacent the press frame it, which gear 638 meshes with the left spiral gear ltd as shown in Figs. 1 and 3. The right spiral gear G99 meshes with the spiral gear Mil (Figs. 1 and 9) that is fastened to the sleeve Mi through which passes the right end of the cross-shaft itl with the sleeve idi journalled in the bearing 992 secured in the press-frame i2. Adjacent the bearing M2 outside the frame 62 is the inner handle M3 keyed to the sleeve MI! by which the spiral gear 995 may be rotated in either direction. This inner handle M3 carries the interiorly geared collar ltd which is adapted to slide over and engage the exteriorly geared collar N9 of the outer handle itt that is slidably keyed to the cross-shaft it'i.

The spring idlcoiled about the outer end of the shaft 631] and held within the cylindrical socket M9 formed in the handle M9 by the cap M9 normally forces the geared collars M9 and M9 into engagement so that by turning either handle its or ltd the spiral gears E94 and itt may be rotated in unison an approximately equal number of degrees. to exert pressure at both ends of the cylinders i9 and 29.

However when the outer handle N9 is pulled outwardly (to the right in Figs. 1 and 9), the geared collars M9 and 695 are disengaged so that M9 may each be rotated separate adjustment of the respective pressures to be applied to either end of the cylinders 89 and 29 to secure delicate adjustments for proper printing. a

Means are provided for raising and lowering separately to make the pair of vertically movable bars I21 connected to the head 92' to lift or lower the cylinders I9 and 20, which mechanism is best shown in Figs.

1-3 and 6: Journalled in the press frames II and I2 is ;the cross-shaft I5I the left end of which (Fig. 1) carries the worm gear I52 that is actuated by the worm I53 mounted on'the shaft I54 journalled in the housing I55 fastened to the frame II, this shaft I54 being driven by a suitable motor (Figs. 1 and 6). The devices for actuating the bars I21 are duplicated on either side of. the press and a description of those attached to the press frame II will suflice. The shaft I5I is provided with eccentric journal I56 which actuates the toggle arm I51, andthe cap I58 held on the arm I51 by the screw-nut I 58 (Fig. 3). The lower end of the arm I51 is pivoted on the cross pin I59 extending across the slot I60 formed midway in the pivoted cross-head I6I that is formed with the forked end I64 which bears against the bracket I63 and slidably holds the rod I65-that carries the integral stop collar I66 normally located slightly above the bracket I61 fastened to the frame II through which bracket I61 the lower end of the rod I65 reciprocates.

Extending across the slot I60 and journalled to the sides of the cross-head I6I is the short stud I68 having a threaded aperture I69 that engages the threads on the bar I21. When the eccentric journal I56 is rotated substantially 180 limited by stops (not shown) the toggle arm I51 is raised which causes the cross-head I6 I to bear down on the collar I66 against the bracket I61 to lift the stud I68 and the therewith connected bar I21 to raise the cylinders I9 and 20 out of contact with the cylinder I 8.

By a reverse movement of. the eccentric journals I56, the parts would take the positions shown in Fig. 3 and the three cylinders I8, I9 and 20 will bebrought into printing relation.

The up and down movement of the bars I21 to exert the required pressure on the cylinders I9 and 20 is adjusted through either or both of the handles I43 and I41 relatively to. the printing cylinder I8 which has been hereinbefore described is coupled with separate fluid pressure indicators and connecting mechanism so that the pressman may readily ascertain and adjust the pressures applied at either end or at both ends of, the cylinders I9 and 20. Such devices are best shown in Figs. 2 and 3 and are dupli cated on either side of the press: The forked end I 64 of the cross-head I6I when raised bears against the collar I having the upwardly projecting sleeve "I that slides up and down on the rod I65. Coiled about the sleeve HI and rod I65 is the compression spring I12, the upper end of which bears against the piston I13 mounted on the end of the rod I65. The piston I13 is movable within the piston chamber I14 secured to the frame II, and a pair of screw-nuts I on the sleeve "I adjust the preloading of the spring I12 that is yieldingly interposed between the piston I13 and the sleeve "I with the collar I10 acting against the forked end I64 to yieldin'gly apply the pressure to the cylinders I9 and 20. The packing washer I16 is fastened to the piston I13 by the screw-nut I11 threaded to the end of the rod I16, to form a fluid seal within the piston chamber I14.

The fluid pressure indicating mechanism is shown in Figs. 2 and 3: The reservoir I18 is connected to atmosphere by the hole I19 in the cover I80 and is partly filled with any suitable liquid, such as oil I8I. The bottom of the reservoir I18 is connected by the pipe I82 to the crosspipe I83 having the ball check valves I84 and I85 seated by the springs I86 held by the screw plugs I81. The upper end of the cross-pipe I 83 is connected by the pipe I88 having the ball check valve I89 to the upper part of the piston chamber I 14 (Fig. 3) with the branch pipe I90 leading from the pipe I88 to the indicator gauge I9I.

In like manner the lower end of the cross-pipe I83 is connected by the pipe I9 I having the ball check valve I92 through the pipe 200 to the upper part of a piston chamber (not shown) that is similar to the piston chamber I14 and is located on the press-frame I2 on the opposite side of the press with the branch pipe I93 leading from the pipe I 9| to the indicator gauge I94 the check valves I84, I85, I89 and I92 automatically replenish any loss of liquid within the pressure system by permitting liquid to be drawn from the reservoir I18, when the pressure within the pressuresystem falls below the atmospheric pressure and prevents the liquid from returning from the pressure system to the reservoir. For convenience the two gauges I9I and I94 are preferably arranged adjacent each other (see Fig. 2) to enable the pressman to observe the pressures and make proper adjustments from one position. The variable pressure exerted against the two pistons I13 creates 2. corresponding liquid pressure .within the chamber I14 in the chambers I 14 and the respective pipe connections leading back to the gauges I9I and I94 accurately register the fluid pressures in either of the cylinders I9 and 20. A modified arrangement may be used whereby the pressures within the two piston chambers I14 are equalized and indicated on the gauges I9I and I 94. The pipe I 88 carries the T-union I 98 to which the pipe I96 is fastened; such pipe I96 carries the valve I91 and is connected to the T-union I 98 carrying the pipe 200 leading to the piston chamber I14 (not shown).

The T-union I98 is also connected to the fitting I99 on the pipe I9I. When the valve I91 is open the pressures on the cylinders ends become equalized through the pressure liquid. When the valve I91 is closed the pressure indicating mechanism operates as heretofore described.

The operations of the various different mechanisms and devices in my improved press have been described in conjunction with the separate descriptions of their structural details. However the general operations may be summarized as follows: When it is desired to install or remove a printing cylinder I8 in the press, the mechanism shown in Figs. 1 and 2 with the runway bars 98 coacting with the lever arms 84 is used either to install or remove the cylinder I8 in the press frames with the reentrant spaces I4 and I5 affording suflicient width for the shaft ends 22 and 24 and the cylinder travelling on the runway bars 90 and arms 84 to or from its bearings in the press.

Then the gear sleeve 62 is laterally shifted to engage both the gears 23 and 6|, and is fastened by the pin 63 to connect up the driving apparatus contained in the housing 21. The control rod 40 is then shifted to determine the direction of rotation of the cylinder I8, the whole constituting a reversible clutch drive that is detachably connected to the cylinder shaft end 22, such drive being laterally movable within the reentrant space I4 to free the shaft end 22 when required to remove a printing cylinder in the press. A lateral adjustment of the'cylinder I8 is secured by manipulating the handle 61 as before described.

/ To bring the cylinders I9 and 20 into printing relation with a newly installed cylinder I8, the cylinders I9 and 20 are lowered by depressing the heads 92 through the downward movement of the vertical bars I2] actuated by the eccentric journals I56 on the rock-shaft I5I driven from the motor shaft I54 shown in Fig. 6. Then the pressman adjusts the relation between cylinders I8 and 20 until the required pressure is I68 to assume their lowermost position by manipulating either or both of the handles I43 and I46 that actuate the spiral gears I34 and I95 'to' move the bars I21 in either direction, the

pressures applied are indicated in the gauges I 9| and I94 by the detailed mechanisms centered about the movements of the forked 'end I64 of the cross-head I6I as hereinbefore described.

It will be observed that the printing relation of cylinders I9 and 20 with cylinder I8 may be tripped by revolving the rock shaft I5I, substantially 180, until the eccentric journals I56 are in their uppermost position and the previous adjusted printing relation reestablishedby revolving rock shaft I5I to its predetermined impression position and that the printing pressure is always visible on gauges IM and IM.

My invention, in its broader aspects, is not limited to the particular construction and arrangement of the cylinders and associated mechanism as shown in the rotary. web gravure printing-press illustrated in the drawings, since many changes may be made without departing from the main principles of the invention and without sacrificing its chief advantages in use. Furthermore my improvements may be embodied in rotary printing-presses of various types where it is particularly desirable to secure delicate? pressure adjustments between the cylinders comprising the printing unit as well as to provide simquired.

plifled means for exchanging cylinders as re- I claim as my invention:

1. In a printing-press, a plurality of cylinders comprising the printing unit,means for exerting apreviously set pressure upon said cylinders and means for indicating the total amount of pressure between the cylinders applied by said pressure exertingmeans.

2. In a printing-press, a plurality of cylinders comprising the printing unit, means for exerting a previously set pressure upon one of said cylinders at each end thereof, including means for indicating thetotal amount of the pressure between said cylinders applied by said pressure exerting means.

3. In a printing-press, a-plurality of cylinders comprising the printing unit, means for exerting a previously set pressure upon one of said cylinders at each end thereof, and separate means for indicating the total amount of pressure besaid liquid, and means tween said cylinders applied by said pressure exerting means.

4. In a printing-press, a plurality of cylin- "ders comprising the printing unit, means for adjusting the pressure to be exerted. upon one of said cylinders at either end thereof, said means being adaptedto operate separately or simultaneously in applying such pressures to said cylinder, and separate fluid pressure means for indicating the total amount of pressure between said cylinders applied by said pressure exerting means.

5. In a rotary gravure printing-press, a printing cylinder and a therewith coacting impression cylinder, means for forcing said impression cylinder bodily into printing relation with said printing cylinder, including means separately or simultaneously operable to adjust the pressure at either end or both ends of said impression cylinder, and fluid pressure means for indicating the total amount of pressure between said cylinders applied by said pressure exerting means.

6. In a printing couple, a printing-cylinder, a pressure roller, an impression mechanism for said impression roller comprising an eccentric rockan adjustable connection between said the pressure roller, including an connection within a presshaft, rock-shaft and adjustable yielding surechamber, a piston movable therein, a prescylinder and a coacting pressure roller, means for moving said roller into printing relation with the cylinder including pressure member coacting with said rock-shaft and said pressure roller to y'eldingly maintain said printing relation, coacting means for tripping the roller from the cylinder, and means for adjusting said pressure roller relatively to said tripping means.

9. In a printing-press, a plurality of cylinders comprising the printing unit, means for exerting a previously set pressure upon the cylinders, said means being adapted to reapply said previously set pressure to said sure mechanism indicating the pressures so applied by said pressure exerting means to the ends of the cylinders, and means for automatically supplying liquid to the fluid pressure system in the event of losses therefrom.

10. In a printing-press, a plurality of cylinders comprising a printing unit, means for apcylinders, a fluid presa rock-shaft, a yielding plying a previously set pressure upon said cyl- 11. In a printing-press, a plurality of cylinders comprising a printing unit, means for exerting a previously set pressure upon said cylinders comprising a rock-shaft, an adjustable connection between the rock shaft and one of said cylinders, a preloaded yielding member cooperating with said rock shaft yielding connection to exert pressure on a liquid, gauges for registering the pressure of for automatically supplylosses therefrom.

12. In a printing-press, a plurality of cylinders to form a printing couple, means for bodily moving one of said cylinders into printing relation, means including an adjustable yielding member coacting with said cylinder moving means to apply a previously set pressure upon said cylinders at either end thereof and fluid means for indicating the amount of the pressure so applied to the ends of said cylinder.

13. In a printing-press, a plurality of cylinders to form a printing couple, means for moving one of said cylinders into printing relation, means including an adjustable yielding pressure member coacting with said cylinder moving means to apply a previously set pressure upon said cylinder, and fluid means for indicating the amount of the pressure so applied to either end of said cylinder.

14. In a printing couple, coacting cylinders, means for tripping and reestablishing printing relations between said cylinders including ashaft adapted to move a coacting member between two predetermined points and to lock said member at said points, and means operatively connected with said member and one of said cylinders including a preloaded yielding member to maintain printing relation between said cylinders.

15. In a printing couple, coacting cylinders, means for tripping and reestablishing printing relation between said cylinders including means for yieldingly maintaining said printing relation,

and a fluid pressure system including gauges for indicating the total amount of pressure between said cylinders.

16. In a printing, couple, coacting cylinders, separate means operatively connected to each other for simultaneous operation, said means being operatively connected to opposite journals of, one of said cylinders for tripping and reestablishing printing relation between said cylinders, means for yieldingly maintaining pressure against opposite journals of one of said cylinders, and

means for indicating the total amount of pressure applied to between said cylinder journals.

17. In a printing couple, coacting, cylinders, separate means operatively connected to each other for a simultaneous operation, said means being operatively connected to opposite journals of one of said cylinders for tripping and reestablishing printing relations between said cylinders, means for separately maintaining a yielding printing pressure against opposite journals of one of said cylinders, and connected fluid means for equalizing the pressure exerted on said journals and for indicating the total amount of said pressure.

18. An impression and tripping mechanism for a printing press, means including a toggle mechanism for imparting a definite amount of tripping and impression movement to one of the coacting members of the press and to lock said means in both tripped and impression positions. other means including a spring to yieldingly apply pressure to one of said members, and fluid means having coacting gauges for indicating the pressure so applied.

19. In a printing couple, coacting cylinders therein, an impression and tripping mechanism for one of the cylinders of said couple including a coacting member, means for moving said member between two points located in fixed relation to one of the other cylinders and to lock said member at one of these points, means for limiting the 2,124,420 ing liquid to the pressure system in the event of rocking movement of said member in its tripped position, and an adjustable connection between said tripped cylinder and said member.

20. An impression and tripping mechanism for aprinting couple comprising a rectilinearly and rockingly guided crosshead, means for eifecting the tripping and impression relation within said couple by moving a rocking point within said crosshead and to lock said point in the impression position, means for limiting the rocking motion of said member, and adjustable connections between said crosshead and one of the cylinders with the said printing couple.

21. An impression and tripping mechanism for a printing couple comprising a rectilinearly and rockingly guided crosshead, means for looking a rocking point within said cross head in a fixed impression position, means including a spring to limit the rocking motion of said crosshead to cooperate with said locking means to yieldingly maintain said crosshead in its impression position, and means for varying the pressure of the impression including adjustable connections between crosshead and one of the members of said couple.

22. An impression and tripping mechanism for a printing couple comprising a rectilinearly and rockingly movable crosshead, means for moving and looking a rocking point within said crosshead, means coacting with said moving and looking means'to limit the rocking movement of said crosshead in impression direction, and fluid means to indicate amount of pressure applied against one of the members in said printing couple.

23. An impression and tripping mechanism for a printing press including a rocking crosshead toggle having a plurality'of rocking points, means for. moving and locking one of the rocking points of said crosshead at extremes of said movement, means for limiting the rocking movement of said crosshead, and adjustable connections between said crosshead and one of the members in said printing press.

24. An impression and tripping mechanism for the cylindersoi a printing press including a rocking crosshead having a plurality of rocking points, means for moving one of the rocking points of said crosshead a predetermined amount in either direction and in fixed relation to one of the cylinders, said moving means adapted to lock said rocking point at the completion of its movement, means coacting with said moving and locking means to limit the rocking movement of the cross-head and to re-apply the previously adjusted pressure. to one of the other cylinders, and means for indicating the amount of pressure so applied. 7

25. In a printing press comprising a printing cylinder and a coacting pressure roller, an adjustable pressure applying means including a preloaded yielding pressure member for applying pressure on said roller, and means for indicating the pressure so applied to said roller.

26. In a printing press comprising a plurality of cylinders forming a printing couple, an impression and tripping mechanism including a yielding pressure member adapted to trip one. of the cylinders of 'said couple, said mechanism also being adapted to restore said cylinder to its impression relation within said couple.

27. In a printing press comprising a plurality of cylinders forming a printing couple, an impression and tripping mechanism including a yielding pressure member adapted to trip one 01'- the'cylinders of said couple, said mechanism also being adapted to restore said cylinder to. its im-,

pression relation within said couple, and means for indicating the amount of pressure exerted between the cylinders when in impression relation.

28. In a printing press comprising a plurality of cylinders forming a printing couple, an impression and tripping mechanism comprising an impression locking means coacting with a yielding pressure member and operatively connected to one of said cylinders to yieldingly apply pressure to said cylinders, and means for indicating the amount of pressure so applied.

29. In a printing press comprising a plurality of cylinders forming a printing couple, an impression and tripping mechanism comprising an impression locking member, a yielding pressure member adjustably connected to one of said cylinv ders to yieldingly apply pressure thereto, and means for moving said locking member to trip the pressure relation of said cylinder from its locked position, said means by its reverse movement automatically restoring said pressure relation when said member is in its locked position.

30. In a printing press comprising a plurality of cylinders forming a printing couple, an impression and tripping mechanism comprising a member coacting with a spring for sequentially applying pressure to one of said cylinders and yieldingly locking same in its pressure relation within said couple, and means for adjusting the relation between said locking member and said cylinder.

31. In a printing couple adaptable for cylinders of different diameters and pressure requirements, an impression and tripping mechanism comprising a pressure applying member and meansfor restoring and locking said member in a fixed impression position, and coacting means including a yielding pressure member and an adjust- I ing member whereby the relation between the pressure applying member and one of the cylinders may be varied to accommodate cylinders of different. diameters and pressure requirements.

32. In a printing press comprising a printing cylinder and a co-acting pressure roller, separate adjustable pressure applying means including a preloaded yielding pressure member for applying pressure on each end of said roller, means for adjusting the pressure applying means for one end of said roller independently of the other pressure applying means while the press is in operation, and means for separately indicating the pressure applied by said pressure applying means to each end of said roller.

33. In a printing press comprising a printing cylinder and a co-acting pressure roller, separate adjustable pressure applying means including a preloaded yielding pressure member for applying pressure on each end of said roller, means for adjusting the pressure applying means for one end of said roller independently of the other pressure applying means, said adjusting means being operable from substantially a single location and means for separately indicating the pressure applied by said pressure applying means to each end of said roller.

34. In a printing press comprising a printing cylinder and a co-acting pressure roller, separate adjustable pressure applying means including a preloaded yielding pressure member for applying pressure on each end of said roller, means for adjusting the pressure applying means for one end of said roller independently of the other pressure applying means while the press is in operation, said adjusting means being operable from substantially a single location, and means for separately indicating the pressure applied by said pressure applying means to each end of said roller.

'35. In a printing press, a printing couple including a printing cylinder and a co-acting pressure roller, mounting means for said printing couple arranged to accommodate printing cylinders and pressure rollers of different diameters, means for applying a previously-set pressure to said roller when in printing relation and for tripping said roller out of printing relation, said last means being adapted to separate said pressure roller from said printing cylinder a dis-' tance substantially independent of the printing position of said roller. I

CHRIS'I'EN R. KADDELAND.

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