US2181894A

US2181894A - Means for registering printing machine cylinders

Info

Publication number: US2181894A
Application number: US95505A
Authority: US
Inventors: William F Huck
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1936-08-12
Filing date: 1936-08-12
Publication date: 1939-12-05
Anticipated expiration: 1956-12-05

Description

' Dec. 5, 1939. w, P HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8 Sheets-Shee 1 INVENTDRJ.

Dec. 5, 1939', w; E HU K 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Fiied Aug. 12, 1936 a Sheets-Sheet 2 INVENTOR Dec. 5, 1939. w. F. HUCK 2,181,894

mums FOR REGISTERING PRINTiNG MACHINE CYLINDERS FiledAugQ 12, 1936 8 Sheets-Sheet 3 INVENTOR.

Dec. 5, 1939. w. F. HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8 Sheets-Sheet 4 Dec. 5, 1939. w. F. Huck 2,131,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8 Sheets-Sheet 5 INVENTOR.

W.' F HUCK Dec. 5, 1939.

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS 8 Sheets-Sheet 6 Filed Aug. 12, 1936 INVENTOR.

Dec. 5, 1939. 4 w. F HUCK 2,181,894 7 MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 4 8 Sheets-Sheet 7 INVENTOR.

7k figwmm Dec. 5, 1939. w HUCK 2,181,894

MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS Filed Aug. 12, 1936 8 Sheets-Sheet 8 lNvEN'roR Fireman. 5, 1939 UNITED STATES PATENT OFFICE MEANS FOR REGISTERING PRINTING MACHINE CYLINDERS William F. Huck, Richmond Hill, N. Y., assignor to R. Hoe & 00., Inc., New York, N. Y., a, corporation of New York This invention relates to printing machines and particularly to that type of printing machine wherein several impressions are made in sequence, as for instance, a multi-color printing machine.

More particularly, the invention relates to mechanism for adjusting a form cylinder rotatively and axially, to accurately register the printing, and which is operable if desired from a position remote from the cylinder, and while the ma chine is in operation.

The mechanism for adjusting the cylinder includes electrically operated devices, thus permitting the operation to be controlled from a position remote from the cylinder, preferably from a convenient position, such as at the delivery end of the machine, whereat an operator may readily observe the register of the printed matter. By the use of the principles and features of this invention, the form cylinder may be immediately adjusted to correct improper register of the printed matter, without interrupting the operation of the machine.

One object of this invention is to provide in a printing machine improved mechanism for rotatively adjusting a cylinder to compensate for irregularities in register of the printed matter.

Another object is to provide in a printing machine improved mechanism for axially adjusting a cylinder to compensate for irregularities in register of the printed matter.

Still another object is to provide a mechanism for axially adjusting a form cylinder of a printing machine without interfering with the ink roller drive associated therewith.

A further object is to provide mechanism for substantially simultaneously adjusting the form cylinder of a printing machine both rotatively and axial y and which is adapted for remote control and is operative during machine operation.

Still further objects include the provision of electrically operable means for actuating the cylinder adjusting mechanism and remote control devices for said electrically operable means.

It is also an object of this invention to provide improvements in printing machines of generally \improved construction, whereby the device will be simple, durable and inexpensive in construction, as well as convenient, practical, serviceable and efficient in its use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed.

The preferred embodiment of the invention is illustrated in the accompanying drawings, where- Figure 1 is an end view of an adjusting mechanism, embodying features of this invention, applied at one end of a cylinder and which is adapt- 5 ed to be operated remote therefrom, to rotatively adjust thecylinder in respect to its driving means;

Figure 2 is a section on line 2--2 of Figure 1;

Figure 3 is a section of an adjusting mechanism, embodying features of this invention, applied to the other end of a form cylinder, associated with which is the driving means for an ink roller and the means for vibrating the roller, and which is adapted to be operated remote therefrom, to axially adjust the cylinder in respect to 15 its associated parts;

Figure 4 is a section on line 4-4 of Figure 3;

Figure 5 is an end view of a somewhat modified form of cylinder rotatlve adjusting mechanism;

Figure 6 is a section on line 5-6 of Figure 5;

Figure 7 is a partial section on line I of Figure 5;

Figure 8 is a partial section on line 8 of Figure 6;

Figure 9 is a top View of a cylinder showing the disposition of the adjusting means of this invention in respect thereto;

Figured!) is a schematic diagram of the electric circuits involved in the use of the mechanism shown in these drawings; and 30 Figure 11 is a partial side view of another modified form of rotative adjusting mechanism.

Referring first to Figure 9, it will be understood that the cylinder It may represent a form cylinder of a printing machine having a shaft ll journaled in, and extending between, machine frame members 12. The shaft II is driven by a gear B3 in mesh with a gear l5, disposed in a casing l4 secured to the machine frame member I! at one end of the cylinder. The cylinder I0, 40

as is well understood, cooperates with an impression' cylinder (not shown) and between which a web of material to be printed upon passes. From here the web passes between similar pairs of cylinders and on through the printing machine to a position known as the delivery end of the machine, at which position the completely printed product is delivered from the machine. I

Referring to Figures 1 and 2, the shaft Ii is driven by the gear l3 through a composite gear I5, which although shown as being in two parts is to be considered for the purposes of this description as being a single part gear. The gear i5 is mounted for free rotation upon a sleeve l6 which is shown secured to shaft .H by a key chine. When it is desired to rotatively advance or shown formed as a part of, to a sleeve 48 which II. The gear I5 is connected to the sleeve [6 to drive the shaft II in the forward direction by means'of a bracket-like arm l6 formed on the sleeve l6 and having a bore 18 formed in a cylindrical member 2| thereof, in which is slidably mounted a nonrotatable stud shaft 22, which extends beyond the member 2l at each end thereof, being keyed to the arm l8 and having a nut 23 threaded upon end and engaging a shoe 24 at the other end, the shoe 24 in turn engaging a boss 25 formed on an end face of the gear [5.

The stud shaft 22 is provided with threads upon an intermediate portion thereof within the bore E8 of the member 2 I, which threaded portion is positioned within the bore of a rotatable wormwheel 26 carried by the arm 18. Threads formed in the bore of the worm-wheel 26 cooperate with the threads on the shaft 22 to rotatively move the gear 45 and the sleeve iirelatively to each other in either direction depending upon the direction of rotation of worm-wheel 26. The wormwheel 26 is rotatably disposed between

opposing shoulders

21 and 28 provided on the member 2|.

Another arm 3| is provided on the sleeve l6 and has a hollow member 32 thereon in which is mounted a cylindrical shell 33. A plunger 34 is slidably mounted in the shell 33 and is urged therefrom into engagement with a lug 35, formed on the gear l5, by a spring 36. The spring 36 acts between a shoulder 31 formed on the plunger 34 and a closed end 38 of the shell 33. The spring pressed plunger 34 constantly urges the gear IS in the rotative direction to insure positive contact of the lug 25 with the shoe 24 and to prevent loose motion between the same, the shaft 22 and the worm-wheel 26. The worm-wheel'26 is in mesh with a worm 4|, the shaft 42 of which is journaled in arm l8 and extends parallel with the cylinder shafe I I beyond one end of the sleeve [6. A gear 43 is secured to the extended end of a worm shaft 42by a key 44 and a nut 45 threaded on the end of the shaft 42. g

The above described mechanism is all enclosed in the casing l4 and revolves with the cylinder l8 about the axis of the shaft II in synchronism with the other moving parts of the printing mathat pinions 46, 4'! and 54 with their respective shafts all rotate with the bracket 5| and the sleeve l6 under normal conditions.

A brake drum herein in the form of a

sheave solenoids

68 and 69. A spring 10 is provided and disposed between the plunger 61 and the free end of the arm to take up lost motion and to maintainthe parts in operative position. Energization of either solenoid will actuate its plunger 61 to rock the lever 62 connected thereto and. press one of the brake shoes into braking engagement with one of the sheaves within the groove thereof. Herein the

solenoids

66 and 69 are arranged to actuate the cooperating parts2 to cause the

brake shoes

58 and 59 respectively to engage in the grooves of

sheaves

56 and 51 respectively.- The

solenoids

68 and 69 may be energized by the actuation of push button switches II and 72 respectively, as shown in Figure 10. The push button switches II and 12 may be conveniently located at any desired position about the printing machine, preferably at a point where the machine operator can readily observe the register of the printed matter, for instance, at the delivery end of the machine.

Energization of solenoid 68, by actuation of push button switch II will through the instrumentality of the plunger 61, the link 66, the spring 16, and the lever- 62 press the "brake shoe .4 58 into braking engagement within the groove of the sheave 56. This action prevents further revolution of pinion 46 about the axis of the cylinder shaft II with the bracket 5| and sleeve l6. and due to the continuation of the revolution of 'thegear 43 about the axis of the cylinder shaft II and of it being in mesh with the pinion 46; gear 43 will be rotated about its own axis and. thereby revolve the worm-wheel 26 about the stud shaft 22 to rotatively adjust the gear II! by advancing it relatively to the sleeve l6'and the cylinder I 8.

In like manner, energization of solenoid 69 by actuation of the push button switch 12 will actuate the brake shoe 59 to prevent revolution of 2

pinions

41 and 54 about the axis of shaft II with bracket 5| and ve l6, and revolve the wormwheel 26 in n ther direction about the stud shaft 22 to rotat vely adjust the gear l5 by receding it relatively to the cylinder Hi. In the above manextends axially with respect to the cylinder shaft n r r tiv dj stm t of t d r l l ll outwardly through th casing ll, being j ur-jdv'ely to the machine parts cooperating therenaled in a bearing 49 formed on abracketij w my be accomplished from a emote posisuitably secured to the sleeve l6 and rotatable and register of the Printed matter may be therewith about the axis of shaft II. The pinion 41 is supported upon a stud shaft 52"secured in and extending from a, boss 53 formed on the bracket 5|, and is also in mesh with a pinion 54. The pinion 54 is connected to, herein shown formed integral with, a shaft 55 which extends through and is journaled in the sleeve 48; At its outer end the shaft 55 is provided with suitable wrench or other tool engaging faces whereby it may be manually actuated if desired to cause rotation of the gear 43. It will be understood recede the cylinder I 8 in respect to-a cylinder cooperatingtherewith in order to correct the register of the printed matter, the gear l5 and the cylinder shaft I I must be rotated relatively to each other in the proper direction. This may be accomplished by rotation of the gear 43 whereby the worm-wheel 26 will be rotated upon the threaded portion of the stud shaft 22 toswin the gear l5 rotatively about the sleeve 16. Gear 43 is herein adapted to be rotated with the worm 4! by being in mesh with a pinion 46 and an idler pinion 41. Pinion 46 is connected, herein with the machine operation.

The mechanism for axially adjusting the cylinder l8, shown in Figures 3' and 4, comprises a' spindle 14, one end of which is secured by means edthereon to an end plate Tl of a closed bearing supporting sleeve 18 in which the shaft H is iournaled. The sleeve fl! is mounted in the machine frame-member II for axial movement relfl 56 is keyed to the sleeve 48 and a brake drum 5 secured to the plunger 61 of one or the other of 15 continuously maintained without interfering 435 v of a collar 15 formed thereon and a nut 16 threadtively thereto and the'shaft .II is rotatively fixed to the sleeve for axial movement therewith, one portion 18 of the roller bearing being secured to the end of shaft II by an end clamping member 8I and the other portion 82 of the roller bearing being. secured to, and in the sleeve, by the end plate 11 which clamps it against an internal shoulder 83 formed in the sleeve.

A cover plate 84 secured to the frame member I2 is provided and has a sleeve portion 85 extending axially therefrom through which the spindle 14 extends and is secured thereto by a key 88 to prevent it rotating relatively to the shaft v II or the sleeve 18 but axially slidable with the shaft and sleeve relatively to the cover plate 84. A spring 81 is provided which is disposed about the spindle 14 and has one end in abutment with the collar and the other end in abutment with a shoulder 88 formed on the sleeve portion 85, whereby due to the tension of the spring 81, the

shaft II through its connection with the spindle,

as above described, is constantly urged axially in one direction.

The spindle 14 extends beyond the outer end of the sleeve portion 85, whereat it is reduced in diameter and threaded to receive an internally threaded worm-wheel 89 which abuts the outer end of the sleeve portion 85. Rotation of the worm-wheel 89 in one direction, due to it abutting the end of the sleeve portion 85, will pull the spindle 14 and with it the shaft II,through the connecting parts, end plate 11, hearing sleeve 18,

roller bearing portions

82 and 18, and the end clamping member 8i, against the tension of the spring 81 in one direction to adjust the cylinder I8 axially in one direction to correct improper register or alignment of the printed matter in the machine. Rotation of the worm-wheel in the other direction will release the shaft II and permit its movement axially in the other'direction by the spring 81 to adjust the cylinder i8 axially in the other direction. A collar Qi is se-' cured to the outer end of the threaded portion of the spindle M to limit the movement of the same, and shaft II in the direction of the movement thereof given them by the spring 81 during to the shaft 95 and in mesh with the worm-wheel 89. The motor 92, referring to Figure 10, may be energized from a remote position, preferably one from which register of the printed matter may be readily observed, such as at the delivery end of the machine by push button switches 81 and 88, one acting through a suitable electric control 88 to cause the motor 92 to rotate in one direction and the other to cause rotation of the motor in the other direction.

In this instance, the sleeve portion 85 forms a bearing support for a separately driven gear I from which an ink roller (not shown) is driven. The driven gear I has a hollow hub extension I42, upon which is formed helical gear teeth I43, which are yin mesh with the teeth of a helical gear I44 connected by a shaft I45 to the ink roller reciprocating mechanism (not shown)- A casing I48 secured to frame member I2 is provided to cover the above described parts and upon which the motor 82 is mounted.

By the use of the mechanism shown in Figures 1 and 2, the arcuate range of the rotative adjustment of the cylinder I8 is somewhat limited. Where a greater arcuate range of such adjustment is desired, the form of mechanism shown in Figures. 5-8 inclusive may be provided. In this form the cylinder shaft II, has mounted thereon and keyed thereto a sleeve I8I having a recessed extending portion I82 upon the periphery of which worm-wheel teeth I88 are formed. A plate I84 fastened to the end of the cylinder shaft II and to the sleeve I8I retains the sleeve on the end of the shaft. A hollow, generally cylindrical, bracket I85 is secured to the end face of the gear I5, which, in this instance, is rotatably mounted upon the sleeve I 8|. Mounted on the bracket I85 is a'worm I88, the shaft I81 of which is journaled at one end in a bearing lug I88 formed on the bracket I85 and at the other end in a bearing I89 pivoted'to an arm of a lever III in turn pivoted at I I2 to the bracket I85. The other arm of the lever III is arranged to be continuously urged away from the bracket I85 by a spring I I3 whereby the worm I88 is maintained in proper mesh and with no backlash with the worm-wheel teeth I83.

A worm-wheel H4 is secured to an end of the shaft I81 extending beyond the bearing lug I88, and is continuously-urged against the same by a spring I I5 acting between the worm-wheel H4 and a nut I I8 threaded in the shaft end. A worm III in mesh with the worm-wheel H4 is secured to one end of a shaft II8 which is journaled in a bearing H8 formed on the bracket I85, and extends therefrom to have a worm-wheel I2I secured upon its other end. The worm-wheel i2l meshes with a worm I22 formed on a shaft I28 which is journaled in the end face I24 of the bracket I85 and has a pinion I25 secured to its inner end.

The bracket I85 has a hollow hub I28 extending therefrom through the end wall I21 of a casing I28 provided to cover the above described parts and to support the solenoids 88 and 88 and the associated parts actuated thereby consisting of the plungers 81, the levers 82, links 85, and

brake shoes

58 and 58. The

brake shoes

58 and 58 as in the previous form are adapted to engage in the grooves of

sheaves

58 and 51 respectively. The

sheaves

58 and 51 are secured to the outer ends of the sleeve 48 and the shaft 55 respectively. The sleeve. in this instance is iournaled in the hollow hub I28 and the shaft 55, as before, is iournaled in the sleeve 48. As in the previously described form, a pinion 48 is secured upon the inner end of the sleeve 48 and a pinion 54 is secured uponthe inner end of the shaft 55. The idler gear 81 meshing with the pinion 58 in this instance is rotatively supported upon the bracket I85 at I28. The pinion I25 is in mesh with both

pinions

48 and 41.

In similarity with the operation of the previously described form shown .in Figures 1 and 2, selective energization of' solenoids 88 and 88 will apply a braking action upon either

sheaves

58 or 51, whereby either

pinion

48 or 41 will be restrained from revolving about the axis of the shaft II and, therefore, continued revolution of the gear I 5 and the bracket I85 about the toothed sleeve I8I and the axis of the shaft II, will rotate the pinion I25 with its shaft I23 and the worm I22. Rotation of the pinion I25 and the worm I22 through the instrumentality of the wormwheel I2I, the worm I I1, the worm-wheel H4, and the worm I88, will rotatively adjust the cylinder shaft I I and the gear I5 relatively to each other iii) in either direction depending upon which of the solenoids is energized. By the use of the mechanism shown in Figures 5- -8 inclusive such adjustment may be made over a range of- 360 should occasion demand'the same, thereby permitting, if required, the adjustment of the cylinder II one complete revolution in respect to a cooperating cylinder or other machine part.

In the form shown in Figure 11, a reversible electric motor I5I is directly connected to the shaft 55 of the form shown in Figure 6 by a suitable coupling I52. In this instance, the gear 46 is secured to the shaft 55 and may be rotated in either direction by the motor I5I when the same is actuated. The motor I5I has a sleeve like bracket I53 secured to the end of its casing. The bracket I53 fits over the end of the hollow hub I26 and is secured thereto by a screw I54. Contact rings I55, I56 and I51 aremounted upon an insulating ring I58 which is secured to the bracket I53. Brushes I59, IN and I62 connected to a motor control box (not shown) by suitable conductors are mounted on a bracket I63 secured to the casing I21 and respectively contact the rings I55, I56 and I5! to properly energize the motor I 5|. By this arrangement the gear I25 may be rotated in-either direction by the motor |5I to adjust the cylinder shaft II and the gear I5 relatively to each other in either direction. While the motor I5I is shown in Figure 11 as being connected to the shaft 55 and through gears 46 and I25 to actuate the parts shown in Figure 6, it is obvious that it could beassociated with the parts of the form shown in Figure 2 to rotate gear 43 through gear 46 and thereby obtain the results desired in the use of that form.

By the provision, in a printing machine, of the above described rotative andaxial adjusting means fora cylinder, an operator may adjust a cylinder either axially or rotatively or adjust it both ways substantially simultaneously, while the machine is in operation and continuallymaintain the printed matter in register longitudinally, laterally or diagonally in respect to the printed sheet. These operations can be accomplished by an' operator positioned remote from the cylinder at a position from which the printed sheet is clearly visible. I

It will be understood that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and'it is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, and it will be further understood tha each and every novel feature and combination present in or possessed by the mech-.

anism herein disclosed forms a part of the invention included in this application.

What I claim is:

1. In a printing machine, a rotatable cylinder, means to adjust said cylinder axially, said means including a spindle secured to and extending axially from said cylinder, said spindle having threads formed thereon, a worm-wheel on said spindle cooperating with said threads to axially move said spindle when rotated, means to rotate said worm-wheel in" either direction, and means to control said worm-wheel rotating means from a position remote'from said cylinder.

2. In mechanism to axially move a rotatably mounted cylinder, a spindle secured to and extending from saidv cylinder, and being relatively rotatable in respect thereto, said spindle having threads thereon, a member rotatably mounted on said spindle and having threads cooperating with the threads on the spindle to move the same, and with it the cylinder, axially in one direction when the member is rotated in one direction, and a spring arranged to urge said spindle and cylinder axially in the other directionwhen said member is rotated in the other direction.

3. In a printing machine, a cylindrical mem-' her, a driving gear member, mechanism operably interposed between said members to rotatively adjust one of said members relatively to the other member and including cooperating relatively rotatable elements, a yieldable member for biasing one element for operable engagement with another element to-prevent backlash, and means actuated by the rotation of the cylindrical member to rotate certain of said elements relatively to another, i

4. In a printing machine, a cylinder, a cylinder driving gear, mechanism for rotatively adjusting said gear relatively to said cylinder and including a pair of cooperating elements, a first of said elements engaging a part on said gear and being adapted to move axially to rotate the gear relatively to the cylinder, and the second of said elements beingrotatably mounted on the first element and adapted to move it axially, and yieldable means for biasing the axialw-movable first element into engagement with the said part of the gear.

5. In a printing machine, a cylinder, a cylinder driving gear, a sleeve secured for rotation with the said cylinder and upon which said gear is rotatably mounted, mechanism to rotatably adjust said gear relatively to said .cylinder and including gear teeth on the periphery of said sleeve, a bracket secured to said gear, a sleeve driving gear having teeth in mesh with the teeth on saidsleeve and being mounted on said bracket, said pinion having a shaft journaledin said bracket sleeve, means to rotate said pinion shaft, and

gearing carried by'said bracket and connecting said sleeve driving gear and said pinion, and

yieldable anti-backlash components interposed in the said mechanism for rotatively adjusting said gear relative to said cylinder.

6. In a printing machine, a cylinder, a cylinder driving gear, a sleeve secured for rotation with the said cylinder and upon which said gear is rotatably mounted,'mechanism to rotatably adjust said gearrelatively to said cylinder and including gear teeth on the periphery of said sleeve, a bracket secured to said gear, a sleeve driving gear having teeth yieldingly in mesh with the teeth on said sleeve and being mounted on said bracket, said bracket having a sleeve extending therefrom, a pinion having a shaft journaled in said bracket sleeve, an electric motor secured to, and carried by, said bracket sleeve and having its shaft connected to said pinion shaft, andgearing carried by said bracket and connecting said sleeve driving a gear and said pinion.

7 In a printing machine, a cylinder, a cylinder driving gear, a sleeve secured for rotation with the said cylinder and upon which said gear is rotatably mounted, mechanism to rotatably adjust said gear relativelyto said cylinder and including gear teeth on the periphery of said sleeve,

a bracket secured to said gear, a sleeve driving gear having teeth in mesh with the teeth on said sleeve and being mounted on said bracket, means for yieldably maintaining the sleeve driving gear in mesh with the teeth;on the sleeve, said bracket bracket sleeve, a second pinion having a shaft journaled in said hollow shaft, a brake drum connected to each shaft, and gearing carried by said bracket and connecting-said first and second pinions to said sleeve driving gear 8. In a printing machine, a cylinder member, a driven member, means operably interposed between the cylinder member and drlven'member to drivingly connect said driven member to said cylinder member and including separate relatively movable cooperating components, one of the components being supported by one member and axially movable to engage the other member to augularly move the members relative to each other, and yieldable means operably interposed between the said members to constantly bias the axially movable component into engagement with the said other member to permit the adjusting movement of the said members relative to each other to prevent backlash in the adjusting mechanism.

9. In a printing machine, a cylinder, a driven member, means operably interposed between the cylinder and driven member to drivingly connect said driven member to said cylinder and including a pair of elements, one of said elements being axially movable and engaging the driven member and the other element rotatably mounted upon the axially-movable element and cooperating therewith to axially move it, the axially-movable member being supported for movement with the cylinder and engaging the driven member so that axial movement of the axially-movable member rotatably adjusts said cylinder and said-driven member relative to each other, a gear connected to said rotatable element, a pair of pinions drivingly connected to said gear, the axis of said pinion being in alinement with the axis of said cylinder, a gear being mounted for rotation bodily about the axis of said pinion, separate brake means for selectively engaging said pinions, means to selectively actuate either of said brake means to prevent rotation of the pinion connected thereto, and yieldable means operably interposed between the cylinder and driven member to constantly bias the axially-movable member into engagement with the driven member.

10. In a printing machine, a cylinder, a driven member, means operably interposed between the cylinder and driven member to drivingly connect the cylinder and driven member and including an axially-movable member, a member rotatable relative to the axially-movable member and cooperating therewith to axially move the axiallymovable member, a terminal of the axially-movable member engaging the driven member to rotatably move the driven member relative to the cylinder, means engageable from a point exterior of the cylinder and operable by the movement of the cylinder to actuate the said rotatable member, and means interposed between the cylinder and rotatable member to constantly bias the axially-movable member to engagement with the driven member so that axial movement of the axially-movable member adjustably moves the cylinder in angular relation to the driven member.

11. In a printing machine, a cylinder, a driven member, means operably interposed between the cylinder and driven member to drivingly connect the cylinder and driven member and including an axially-movable member, a member rotatable relative to the axially-movable member and cooperating therewith to axially move the anallymovable member, a terminal oi the axially-movable member engaging the driven member to rotatably move the driven member relative to the cylinder, a gear operably connected with the said rotatable member, a pair of pinions drivingly connected to said gear, said gear being mounted for rotation bodily about the axis of said pinions, a brake drum connected to each pinion, a brake shoe cooperating with each of said drums, and means interposed between the cylinder and rotatable member to constantly bias the axially-movable member to engagement with the driven -member so that axial movement of the axiallymovable member adjustably moves the cylinder in angular relation to the driven member.

12. In a printing machine, a form cylinder rotatable in an axially movable bearing constructed and arranged to hold the cylinder against axial movement relative thereto, the bearing having a rotatable part and a non-rotatable part, an adjusting mechanism including an axially movable non-rotatable adjusting member operably connected to the non-rotatable part of the bearing, means to move the adjustable memher and thereby the bearing and cylinder axially in one direction, and resilient means engaging the said adjusting member to bias the adjusting member and thereby the bearing and cylinder in the opposite direction to prevent backlash in the adjusting mechanism.

13. In a printing machine, a cylinder, a cylinder driving gear supported with the cylinder and augularly adjustable relative thereto, a worm gear fixed relative to the cylinder and rotatable therewith, a worm rotatably supported by the said cylinder gear in mesh with the worm gear, and yieldable means for normally biasing the worm towards meshing relation with the worm gear.

WIIILIAM F. HUCK.