US1148469A

US1148469A - Printing-press attachment.

Info

Publication number: US1148469A
Application number: US70567712A
Authority: US
Inventors: Theodor Wensel
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-06-24
Filing date: 1912-06-24
Publication date: 1915-07-27
Anticipated expiration: 1932-07-27

Description

T- WENSEL.

PRINTING PRESS ATTACHMENT.

APPLICATION FILED JUNE 24. 1912.

Patented July 27, 1915.

8 SHEETS-SHEET I COLUMBIA PLANQG'RAPH 60.,WASHIN01'0N. I}. c.

T. WENSEL.

PRINTING PRESS ATTACHMENT. APPLICATION FILED JUNE 24. m2.

a SHEETS-SHEET 2.

Patented July 27, 19 15:

COLUMBI A'PLANQORAPH C0,,WASHINGTON. D. C.

T. WENSEL.

FatentedJuly 27, 1915.

8 SHEETS-SHEET 3.

COLUMBIA PLANOGRAPH 60.. WASHINGTON. D. c.

T. WENSEL.

. Patented July 27, 1915.

8 SHEETS-SHEET 4.

COLUMBIA PLANDCIRAPH CO-KWASHINOTON. D. C-

T. WENSEL.

PRINTING PRESS ATTACHMENT. APPLICATION FILED JUNE24, 1912.

Patented July 27, 1915.

8 SHEETS-SHEET 5- T. WENSEL.

PRINTING PRESS ATTACHMENT.

APPLICATION FILED JUNE24, I912.

' Patented July 27, 1915.

B SHEETS-SHEET 6- COLUMBIA PLANOCIRAPH ct).v WASHINGTON. D. c.

T; WENSEL.

' PRINTING PRESS ATTACHMENT.

APPLICATION FILED JUNE 24, I912.

Patented July 27, 1915.

9&90

8 SHEETS-SHEET 7.

COLUMBIA PLANDGRAPH CO-.WASHINGTON. D. C.

T. WENSEL. PRINTING PRESS ATTACHMENT.

APPLICATION FILED JUNE 24.1912.

Patented July 27, 1915.

8 SHEETS-SHEET 8.

Way.-

COLUMBIA PLANOCIRAPH co. WASHINGTON, D4 c.

THEODOR VTENSEL, OF JOLIET, ILLINOIS.

PRINTING-PRESS ATTACHMENT.

Application filed June 24, 1912.

To all 107mm it may concern:

Be it known that I, Ti-rnonon WENSEL, a citizen of the United States, and a resident of Joliet, Illinois, have invented certain new and useful Improvements in Printing-Press Attachments, of which the following is a specification.

My invention relates generally to improvements in printing presses and has particular reference to improvements in so-called flatbed printing presses.

There are a great number of printing presses now in use of the flat-bed class. Such presses have a reciprocating flat bed upon which the type or printing plates are mounted, and an impression cylinder mounted over the same. The type is inked by contacting inked rollers as the bed moves back and forth. The paper or other material is printed by being pressed against the inked type by the impression cylinder. The usual flat bed press has a two-revolution impression cylinder, that is, the impression cylinder revolves twice for every reciprocation of the type bed. During one revolution, the impression cylinder picks up the paper and moves down to contact the inked type while it moves thereunder in one direction, and during the other revolution it moves upward to permit the free return of the type thereunder in the other direction, and discharges the paper. Therefore in the usual flat-bed press a print is made for every other revolution of the cylinder, or, in other words, for every reciprocation of the type bed. The term flatbed, flat bed presses, etc., as here used, however, should be construed in the broad sense of a printing press having a flat reciprocating type bed and an impression cylinder of any desired size mounted over the type bed and making any desired number of revolutions per reciprocation of the type bed. In these presses considerable pressure is required to print, inasmuch as ink is not readily transferred from metal to paper. Certain kinds of paper are harder to print upon and require greater pressure than others. For instance, a very good print can be made upon smooth or calendered stock with comparatively little pressure, while upon rough or matted stock it is extremely diflicult and practically impossible to make a good print even with tremendous pressure. There is a great demand for printed matter, and es pecially pictures,- on rough stock. The rea-.

Specification of Letters Patent.

Patented July 27, 1915. Serial No. 705,677.

son for this is that a more artistic picture can be produced upon rough stock than upon smooth stock. Hence printing shops having only fiat-bed presses or other like presses are unable to print this class of work.

The object of my invention broadly is to adapt flat bed presses to print upon all kinds of stock.

A further object of my invention is to provide an auxiliary device which can be easily applied to printing presses now in use, wherewith such presses are adapted to print a greater variety of work than hitherto.

Another object is to provide an attachment for printing presses which can be applied to standard makes of flat bed presses adapting the same for special artistic printing upon all kinds of stock, and which can easily be disconnected to permit the regular normal operation of the printing press.

Still another object is to reduce the pressure necessary in printing for the purpose of increasing the life of the printing plates and for maintaining a more uniformly perfect product.

A further and particular object of my invention is to provide an automatic machine for carrying out improvements in the process of printing which is described and claimed in my companion application filed of even date herewith, Serial No. 705,678, entitled Process of producing illustrations.

y invention consists generally in an attachment for flat bed printing presses, comprising an auxiliary cylinder operatively interposed between the type bed and the impression cylinder.

My invention consists further in an attachment for reciprocating flat bed presses, comprising a transfer cylinder operatively interposed between the impression cylinder and the type bed, and means for contacting the transfer cylinder with the type and with the. impression cylinder.

My invention also comprises mechanism for interrupting the regular printing operation between the impression cylinder and the type bed and for establishing the printing operation between the impression cylinder and an interposed transfer cylinder.

My invention also consists in the arrangement, construction, and cooperation of the parts whereby the above named objects, and other objects which will hereinafter appear, are attained.

My invention will. be more readily under= stood by, reference to the accompanying drawings which illustrate the preferred embodiment of my invention and wherein:

equipped with mechanism embodying my invention, certain of the parts thereof being removed to disclose the invention more clearly; Fig. 2 is a side elevation of the printing cylinders, and operating mechanism, viewed from the side opposite to that shown in Fig. 1, certain of the outer gearing mechanism being removed to disclose the impression cylinder raising and lowering mechanism; Fig. 3 is a plan view ofsubstantially that portion of the press shown in Fig. 2 with the type bed practically under the cylinders; Fig. 4 is a vertical transverse section substantially on the line -fli ofFig. 2, but showing the type bed under the impression cylinder; Fig. 5 is a vertical transverse'section substantially on the line 5- 5 of Fig. 2; Fig. 6 is an enlarged transverse sectional detail of the transfer cylinder and-supporting standards viewed in direction of arrows in Figs. 1 and 2; Fig. 7 is a view substantially on the line 77 of Fig.1 showing the rock shaft for raising and lowering the transfer cylinder and its actuating mechanism; Fig. 8 is an enlarged side elevation of the transfer cylinder, journal box, standard, and operating mechanism; Fig. 9 is an enlargedside elevation of the rock shaft-actuating and cylinder cutout mechanism; Fig. 10 is a sectional detail substantially on the line 1010 of Fig. 9; Figs. 11 to 1 1, inclusive, are diagrammatic views illustrating diiferent'relative positions of the type bed, impression cylinder, and

transfer cylinder.

Referring particularly to Figs. 1 to 5, 3 is the frame of a standard flat bed press. The type bed 5 is mounted for reciprocation and is driven by means of driving and reversing mechanism, 90, which is operated from'the power shaft '91 through the medium of interposed gearing 92 and 93. The impression cylinder 41 is mounted over the bed '5 in boxes a which are slidably mounted in the portions 3 upstanding from the press frame 3. 6 is an ink plate which is integral with the type bed 5, and which is inked at the forward end by inking mechanism 7 As it moves toward and under the impression cylinder it transfers ink to the roll 8 from which it is applied to the type or printing plate 9. In the normal operation of the press,'z'. 6., the operation exclusive of my attachment, paper is taken from the feed board 11 by the impression cylinder and as the type 9 approaches the central position below the impression cylinder the impression cylinder is lowered to press the paper against the type. The impression cylinder 1 is held down substantially the length of the type bed and is then raised to permit the free return of the type. For depressing the impression cylinder a pair of draw rods 15 are provided oneaoh side of the press. They extend from the lower part of the frame to the top of the journal boxes. The upper portions 15", which enter the box, are reduced to provide shoulders 15. By means of the nuts 15"" the box parts are secured together. The lower ends of the rods are tied together by a strap 15 which is adjustably secured thereto by lock nuts 11. It is obvious that by depressing the strap 15 which is secured to the rods 15, the box carrying the impression cylinder will be lowered. For this purpose eccentrics 11 are provided which are mounted upon a cross shaft 15 Since it is necessary to lower the cylinder at a definite time, a suitably constructed cam 15 is provided for rocking the eccentric shaft 15. A latched connection 15 is provided whereby the rocking of the shaft and consequent depression of the impression cylinder can be interrupted. This is done by rocking the shaft 76 by means of the foot lever 77. The cylinder 1 is raised and held in upper position by strong springs 13. Thus the normal printing operation in this press is between the impression cylinder and type. As previ-.

ously stated, it is not possible to print upon all kinds of stock in this manner. It is my purpose to adapt the press for printing upon all kinds of paper and even upon cloth, canvas and the like. For this purpose I provide an auxiliary cylinder 2 and instead of printing between the impression cylinder 4: and the type 'I print between the impression cylinder and the auxiliary or transfer cylinder 2. For this reason it is necessary to prevent the impression cylinder from pressing the paper against the type. I do this by adjusting the strap 15 through the medium of adjusting nuts 11 so that when the eccentrics 11 operate to depress the cylinder to its lowest position it will be some distance above the type as shown in Fig. 4.. I mount the cylinder 2, in manner to be described in detail hereinafter, so that at the proper time it is brought down into contact with the inked type as the type bed moves from rear position toward the front.

The operation of the press with my attachment will best be understood by reference to the diagrammatic views (Figs. 11 to 14:). I arrange several layers of paper 16 on the impression cylinder 4:, rigidly fixing one of the ends of each at 17 and winding the other ends upon reels 18. Upon the outer of the sheets 16 I paste or otherwise secure undulator or relief plates 20, which are for the purpose of securing a selective pressure, as will be more fully explained. Over the plates 20 I stretch a sheet or blanket 15 of thin yielding and compressible material,

1,14.s,aco

such as a good grade of sheet rubber. This is done by securing it at one end 17 to the cylinder and winding the other end upon a reel 21. this means it can be very tightly stretched to conform to the undulations of the plates 20. The cylinder 4; is provided with papenfeeding mechanism 22 which operates to pick up paper as it passes the feed board 11. I equip the transfer cylinder 2 in manner similar to the impression cylinder 4, that is, I first arrange several layers of paper 25, by means of hooks 26 and reels 27. On the outer of the sheets 25 I mount one or more relief plates or undulators 28, and over these undulators I arrange a sheet rubber blanket 29., One end of the blanket 29 is rigidly fixed at 26 and the other end is attached to a reel 30, where by it can be tightly stretched over the relief plates 28. As shown in Fig. 11, the type bed 5 is in its forward position just starting to move toward the impression cylinder, as indicated by the arrows. At this instant both the impression cylinder 4 and the transfer cylinder 2 are above the type, as indicated by the type line 9'. Fig. 12 represents the type bed under the impression cylinder at which time the paper feeding mechanism 22 has operated to grasp a sheet of paper 31. It will be noticed that as yet neither of the cylinders has engaged the type. The transfer cylinder 2 is provided with a gear 82 for engagement with a rack 33 upon the type bed 5. As indicated in Figs. 11 and 12, the transfer cylinder is raised sufiiciently above the and the gear while they are moving in op posite directions. Fig. 13 illustrates the type bed just starting on its return trip, that is, from the rear to the front at which instant the transfer cylinder is brought down to contact the type. The gear 32 engages the rack 33 and serves accurately to register a predetermined point of the transfer cylinder with a predetermined point of the type bed. The transfer cylinder is at the same time brought into such intimate relation with the impression cylinder that as the paper approaches the same, as indicated in Fig. 1e, pressure is exerted to transfer the ink taken by the transfer from the type to the paper. The intermeshing gear 32 and the rack 33 not only register the cylinder and type bed but also insure same surface speed and thereby prevent blurring. The undulators or relief plates 28 are placed upon cylinder 2 in such position that they register with portions of the printing plates 9 from which it is desired to take the greatest amount of ink. This will obviously result, since at thes places greater pressure will be exerted. It is my purpose in pro-.*iding the plates 28 to select so much of the ink from the plates as is necessary to effect an artistic picture; in other words, I endeavor by providing type to prevent interference of the rack suitable relief plates or undulators to keep the high lights clear and to place the necessary amount of ink in the shadows. In theory it would seem that this could be done by one selection, but in practice, due to the inaccuracies of the mechanism, this cannot be done. IIence for the purpose of correcting this fault I provide undulators or relief plates 20 on the impression cylinder 4. These are arranged to exert or relieve pressure where required to transfer the desired amount of the ink from the transfer cylinder to the paper. Thus by two selections I am able to secure a much more artistic picture than is possible where the printing is accomplished directly between the impression cylinder and the printing plate. I am also able to print with less pressure since ink is more readily transferred from printing plate to rubber, and from rubber to paper, than from the printing plate directly to paper. Therefore I not only secure a better picture, but I do it with less wear and tear upon the printing plates. As before stated, good prints cannot be made on rough paper when using the printing press in regular manner. I am able to print upon very rough stock with as great ease and success as upon smooth stock. This is obvious since the rub ber blanket contacts the paper and readily conforms to the undulations of the rough paper.

Having thus described the general operation of the press, I shall describe the mechanism in detail.

The transfercylindcr 2 is provided with journals 2 which enter split journals 2 arranged on each side of the machine. Since the cylinder actuating and supporting mechanism is the same on each side of the machine, a description on one side will serve for both. The upper and lower parts of the journal box 2 are suitably secured together by tap bolts 2 The box 2 is arranged to slide longitudinally in an outer box 2, which is mounted for vertical move ment in a stanua rd 2 The standard 2 comprises a lower brsc portion 2 which rests upon the upper flange of the press frame, and has vertical side posts 2 which are spaced apart and which the outer box straddles. A l. ridge 2 is arranged at the upper end of posts 2 and long tapped rods 40 pass through the bridge member and into the press frame. Nuts are provided to bind the bridge member to the standard and the standard firmly to the frame. It will thus be seen that the cylinder 2 is held in a longitudinal sliding box within a vertical sliding box. vertical sliding box and the longitudinal sliding box simultaneously, so that the cylinder when in its outer or inoperative position can be moved into transferring engagemcnt with the type or printing plates,

It is desirable to move the able seats 63.

, vices r and into printing engagement with theimpression cylinder, as was described in reference to the

diagrammatic views

11 and 12. For this purpose I provide a toggle lever 43 which is connected to the outer or vertical sliding box 2 and toggle lever 45 which is connected to the longitudinal or inner box 2". The upper toggle 43 has a bell crank arm 47, which is connected to the link 4:4: of the lower toggle by a rod 52. The lever 47 is-moved downward by means hereinafterv described thereby straightening toggles and moving cylinder 2 into its lower or printing position as shown in Figs. 8, 13 and 14. As it is necessary to adjust the movement of the cylinder 2 very accurately to secure just the desired pressure, I provide adjustable stops and 56 for limiting the movement of the upper and lower'toggles respectively. I also provide adjustable stops 57 for limiting the downward movement of the outer box. By these means the extreme downward and longitudinal movements of the cylinder can be very accurately controlled. The toggles serve only to depress the cylinder and for the purpose of raising the cylinders, I provide strong compression springs 57 which act against the outer box 2 and serve to raise it after the upper toggle joint is broken. For the purpose of moving the inner box longitudinally or returning it to its inoperative position, I provide a toothed lever 58 pivoted in the outer box at 59 and having a spring engaging portion 59 and a tooth-shaped portion 59 which enters the inner'box, as is well shown in Figs. 1 and 8. A strong compression spring 60 acting against the end portion 59 serves to move the toothed lever 59 in the direction of the arrows in dicated in Fig. 8. The inner box is thereby'returned ,to the position shown in Fig. 1. The upward movement of the vertlcal sliding box is limited by an adjustable stop 61, and the tension of the

springs

57 and 57 maybe regulated by means of adjust- Tn order that any lost motion in the toggle joints may be taken up, I mount the pivot 44: of the upper toggle link as in an adjustable spring pressed sliding box or compensator 64c. I also mount the pivot 46 of the lower toggle link &5 in a sliding box 65. The movement of these may be limited by the adjusting screws (36 and 67 respectively and, as is well shown in Fig. 6, the boxes are opposed by compression springs 68. By this arrangement any lost motion in the toggle joints or connecting rods is taken up. These parts may therefore be called lost motion take-up de- The lowering of the transfer cylinder must be timed with the movement of the bed 5 and for this purposel provide a cam 50 having a suitably constructed cam groove 50. A pivoted lever 51 carrles a rocked on the hub e9 .ment of the lever 51 in one direction therefore forces the cylinder down through the medium of the toggle links and their respective boxes, and movement in the other direction breaks the toggle joints and permits the springs to return the cylinder to its inoperative position.

It is desirable at certain times to permit the movement of certain parts of the press and keep the transfer cylinder in inoperative position. The press regularly contains suitable mechanism which is operable through the medium of a foot lever 77, rock shaft 76 and connecting lever 77' to prevent depression of the impression cylinder, as before described. For the purpose of preventing depression of the transfer cylinder, I provide the unique mechanism l9. This comprises a lever 49 which is keyed to cross shaft 49. It has an extended hub 4 on which a plate lever T9 is mounted so that it may freely rotate. The lever 4-9 is'connected to the cam lever 51 by the connecting rod 70, and hence as the lever 51 moves back and forth the member 49 is The lever 49 is slotted in its upper position, as indicated at 4:9, and across this slot I arrange a cross bar 49. The member 4t9 is provided with an overhanging portion 49 the end 49 of which extends into the upper slotted portion 49 of the lever 49. Thus as the lever 49 moves in the direction of the arrow D, see Fig. 9, the end portion i9 engages the cross strap 49 and moves the lever 49". Since the lever 49 is keyed to the shaft it rocks therewith and thereby moves the lever e17 of the upper toggle, through the medium of the cranks e19" and the connecting rod 46. To move the lever 49 in the direction of the arrow E of Fig. 9 I pivot a latch 49 to the lever as) at 49 which operates in the slotted portion thereof. It has a hooked end portion L9 which is normally held in the path of the end portion l9 of the lever -19.

.Therefore as the lever -19 is returned the hook-end 49 of the lever 49 from the path of the lug 49 I providea rocking cam plate 80 which is mounted to rock loosely on the cross shaft 49. It contains a cam groove which comprises a portion 81 concentric with the shaft and a portion 82 which is substantially radially arranged with respect to the shaft. The end of the hookedlever 4-9 is provided witha stud 49 which extends through one side of the lever 49 and into the cam groove of the plate 80. On this stud. is arranged a cam roller 49. Normally as the lever 49 is rocked back and fOI'l/l'l through the medium of the lever 419, the cam roller travels in the concentric portion 81 of the cam groove and maintains the hooked end 49 in engagement with the lug 49 When I desire to remove the hook from engagement with the lug, I press the foot lever 77 which rocks the shaft 76 and by means of the crank arm 76 and connecting rod 76 moves the plate 80 so that the cam roller is forced into the radial portion 82 of the cam groove. Ihis withdraws the hook end 49 from the path of the lug 49 It is obvious therefore that the lever d9 will move idly back and forth. To return the hook-lever into working position, it is but necessary to release the foot-lever, whence the plate 80 will be rocked to return the roller i9 into the concentric portion of the cam. This mechanism shall be called the cylinder cut-out mechanism.

The impression cylinder at is provided with a large gear 94 which meshes with suitable gearing connected to the power shaft 91. The transfer cylinder 2 is driven from the impression cylinder by means of a gear 95 secured thereto which meshes with the gear 96 of the impression cylinder. While the transfer cylinder and the impression cylinder move to and from each other the

gears

95 and 96 are always in mesh and hence both cylinders rotate continually.

By means of the transfer cylinder, I am able to print on all kinds of material and to secure pictures of much greater beauty. The normal operation of the printing press may be reestablished by simply disconnecting the rod from the operating lever and readjusting the nuts 11 of the draw rods 15 to bring the impression cylinder when in its lowest position against the type. 'I he press may thus be quickly changed from normal to transfer printing and vice versa.

Since the objects of my invention may be attained in a variety of ways which will readily suggest themselves to one skilled in the art, I do not limit myself to the specific structure herein shown and described.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

1. In a printing press of the class described, the combination of a reciprocating type bed, an impression cylinder mounted over the type bed and formed and con nected to contact the type bed in normal operation, and an auxiliary transfer cylinder operatively interposed between the type bed and the impression cylinder for use in transfer printing.

2. In a printing press of the class described, the combination of a reciprocating type bed, an impression cylinder rotatably mounted over the type bed and formed and connected to contact the type bed in normal operation, an auxiliary transfer cylinder rotatably mounted over the type bed, means for contacting it with the type and for contacting it with the impression cylinder for transfer printing.

3. In a printing press attachment, the combination of a reciprocating type bed, an impression cylinder mounted over the type bed and formed and connected to contact the type bed in normal operation and to print therebetween an auxiliary transfer cylinder rotatably bed, means for interrupting the printing operation between the impression cylinder and the type bed, and means for establishing the transfer printing operation between the type bed, the auxiliary transfer cylinder, and the impression cylinder. 7

4. In an attachment for printing presses having a reciprocating type bed and an impression cylinder mounted over the type bed and adapted in normal operation to contact the type bed, the combination of an auxiliary cylinder rotatably mounted over the type bed, mechanism operable to depress the in'lpression cylinder, mechanism for moving the auxiliary cylinder into contact with the type, and mechanism for contacting the auxiliary cylinder with the impression cylinder after the auxiliary cylinder has contacted the type.

5. In an attachment for printing presses having a reciprocating type bed and an impression cylinder mounted over the type bed and adapted in normal operation to contact the type bed, the combination of an auxiliary cylinder rotatably mounted over the type bed, means operable to lower the impression cylinder into intimate spaced relation to the type, means operable to move the auxiliary cylinder into transferring engagement with the type, and means for moving it into printing engagement with the impression cylinder.

6. In an attachment for printing presses having a reciprocating type bed and an impression cylinder mounted over the type bed and adapted in normal operation to contact the type bed, the combination of an auxiliary cylinder mounted over the type bed, means operable to lower the impression cylinder into intimate but spaced remounted over the type e; e e-ere lation to the. type, means for locking the auxiliary cylinder into transferring engagement with the type, and means for locking the auxiliary cylinder in printing engagement with the impression cylinder during its paper-feeding revolution.

7. In a printing press of the class described, the combination of a reciprocating type bed,an impression cylinder mounted over the type bed and formed to contact the type bed in normal operation, an auxiliary transfer cylinder rotatably mounted over the type bed, means for interrupting the printing operation between the impression cylinder and the type bed, means for establishing the printing operation between the type bed, the auxiliary cylinder, and the impression cylinder.

8. In a device of the class described, the combination of a reciprocating type bed, an impression cylinder mounted over the type bed and formed and connected to contact the type bed in normal operation, an auxilviary transfer cylinder rotatably mounted over the type bed, means for interrupting the printing operation between the impression cylinder and the type bed and establishing the. printing operation between the type bed, the auxiliary cylinder, and the impression cylinder, and means for stopping the printing operation at desired intervals during the continued operation of the cylinders and type bed.

9. In an attachment for printing presses having a reciprocating type bed and an impression cylinder mounted over the type 'bed and adapted in normal operation to contact the type bed, the combination of an auxiliary cylinder rotatably mounted over thetype bed, means for interrupting the regular or normal printing operation between the impression cylinder and the type, .means for moving the auxiliary cylinder into ink-selecting relation to the type, and means forpressing the auxiliary cylinder into printing engagement with the impression cylinder. V

' 10. In a machine of the class described, a reciprocatingtype bed, an impression cyl inder mounted over the type bed and formed and connected to'contact the type bed in normal operation, in combination with an undulatory yielding surfaced auxiliary transfer cylinder mounted over the type bed, means for contacting the auxiliary cylinder and type bed, and means for contacting the auxiliary cylinder and the impression cylinder;

, 11. In an attachment for printing presses having a reciprocating flat bed, and an impression cylinder mounted thereover, the combinationof an auxiliary cylinder rotatably mounted over the type bed and having a yielding blanket arranged thereon adapted for the interposition of relief plates between it and the cylinder proper, means for locking the auxiliary cylinder into inktransferring engagement with the type, and means for looking it in printing engagement with the impression cylinder.

12. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted thereover, the combination of a compressible surfaced auxiliary cylinder mounted for rotation over the type bed, means for locking same in ink-transferring engagement with the type bed during movement of the bed in one direction, and means for locking the auxiliary cylinder in printing engagement with the impression cylinder.

13. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted thereover, the combination of an undulatory surfaced impression cylinder, an undulatory surfaced auxiliary cylinder rotatably mounted over the type bed, means for interrupting the normal printing operation between the impression cylinder and the type, and means for establishing the printing operation. between the auxiliary cylinder and the impression cylinder.

14:. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted thereover, the combination of an auxiliary cylinder geared to rotate with the impression cylinder, means for moving the auxiliary cylinder to and from the type bed, and means for moving it to and from the impression cylinder without interrupting the driving connection between the cylinders.

15. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted over the bed, the combination of an auxiliary cylinder operatively connected to the impression cylinder, means for moving the auxiliary cylinder into ink-transferring engagement with the type, and means for registering a predetermined point of the auxiliary cylinder with a predetermined point of the type bed. a

16. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted thereover, the combination of an auxiliary cylinder rotatably mounted over the type bed and operatively connected to the impression cylinder, a register rack on the type bed, a register gear on the auxiliary cylinder, means for moving the auxiliary cylinder toward the type bed to cause an intermeshing of the register rack and register gear as the bed passes under the cylinder in one direction, means for establishing printing operation between the auxiliary cylinder and the impression cylinder, and means for raisng the auxlhary cylinder to permit the l O O free passage of the type thereunder when moving in the opposite direction.

17. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted over the type bed, the combination of an auxiliary cylinder mounted over the type bed and geared to the impression cylinder, mechanism for simultaneously moving the auxiliary cylinder into ink-transferring engagement with the type bed and into printing engagement with the impression cylinder.

18. In an attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted over the type bed, the combination of an auxiliary cylinder mounted over the type bed and geared to the impression cylinder, mechanism for simultaneously moving the auxiliary cylinder into inletransferring engagement with the type bed and into printing engagement with the impression cylinder, and means for simultaneously removing the auxiliary cylinder from printing engagement with the impression cylinder and from ink-transferring engagement with the type bed.

19. In an attachment for printing presses having a reciprocating type bed and an im pression cylinder rotatably mounted thereover, the combination of an auxiliary trans fer cylinder rotatably mounted over the type bed and driven to rotate with the impression cylinder, positive means for moving the auxiliary cylinder simultaneously into position for inletransferring engagement with the type, and for printing engagement with the impression cylinder, and non-positive means operable after the printing period to return the auxiliary cylinder to non-printing position.

20. In an. attachment for printing presses having a reciprocating type bed and an impression cylinder rotatably mounted thereover, the combination of an auxiliary transfer cylinder rotatably mounted over the type bed and geared to the impression cylinder, compound lowering and forwarding mechanism operable to move the auxiliary cylinder into transferring engagement with the type and into printing engagement with the impression cylinder during the paper-feeding revolution thereof, and means operable to return the auxiliary cylinder to non-printing position.

21. In an attachment for printing presses having a reciprocating type bed and an im pression cylinder rotatably mounted thereover, the combination of an auxiliary trans fer cylinder rotatably mounted over the type bed and geared to the impression cylinder, compound lowering and forwarding mechanism operable to move the auxiliary cylinder into transferring engagement with the type and into printing engagement with the impression cylinder during the paper-feeding revolution thereof, compound spring actuating mechanism operable to return the auxiliary cylinder to non-printing position.

22. In an attachment for flat bed printing presses, the combination of a slidably mounted outer box, an inner cylinder-carry ing box slidably mounted within the outer box, toggle devices simultaneously operable to move one of said boxes downward and the other horizontally, mechanism operable to break said toggles, and spring actuated means for returning said boxes to initial position. p v

23. In an attachment for flat bed printing presses, the combination of an auxiliary cylinder supported in compound sliding boxes, simultaneously operable toggle devices for lowering one of said boxes and moving the other horizontally to move the cylinder into printing position, lifting springs 01 erable to raise the outer box, and a spring actuated lever for returning said inner box horizontally whereby the cylinder is returned to non-printing position.

24:- In an attachment for flat bed printing presses, the auxiliary cylinder and its operating mechanism in combination with cylinder actuating and cut out mechanism comprising a lever fixed to a rock shaft, a lever loosely mounted on the hub of said fixed lever, means for rocking said loose lever, and means engaging said fixed lever to rock same and the shaft therewith.

25. In an attachment for fiat bed printing presses, the combination of an auxiliary cylinder supported in compound journal boxes, of toggle devices for moving one of said boxes downward and the other horizontally, and other means for returning said boxes whereby the cylinder is moved respectively from non-printing position to printin g position and thence to nonprinting position.

26. In an attachment for fiat bed printing presses, the combination of an auxiliary cylinder supported in compound sliding boxes, toggle devices for moving one of said boxes downward and the other horizontally, and spring devices for returning the boxes to initial position, as and for the purpose specified.

27. In an attachment for flat bed printing presses, a standard, a box mounted for vertical movement in said standard, a cylinder-carrying box mounted for horizontal movement within said vertical sliding box, in combination with toggle devices for moving said inner box horizontally and the outer vertically, as and for the purpose specified.

28. In an attachment for flat bed printing presses, a cylindercarrying journal box mounted for horizontal movement within a vertical sliding outer box, toggle devices operable simultaneously to depress ing presses, the combination of an inner cylinder-carrying box and outer box, toggles for depressing the outer box and tog- --zgles for moving the inner box horizontally with stop devices for limiting the down-v ward movement of the outer box, and a stop device for limiting the movement of the horizontal toggle. V V V I 30. In an attachment for flat bed printing presses, the combination of a horizontally slidable inner cylinder carrying box, a vertically slidable outer box incasing the inner box, oftoggle devices for operating eachrbox, spring devices for returning the box, and spring-opposed pivot blocks carrying oneof the links of each toggle device.

31. In an attachment for flat bed print- 7 ing presses, a horizontally slidable inner cylinder carrying box, an outer vertically slidable box incasing said inner box, toggle devices secured at one end to the boxes and at the other end to spring-pressed blocks, adjustable stop devices for said toggles, and spring means for. returning the boxes to initial or non-printing position.

32. In an attachment for printing presses having'a reciprocating type bed and an impression cylinder mounted over the type bed and adapted in normal operation to contact'thetype bed, an auxiliary cylinder and its operating parts in combination with a cylinder throw-out device comprising means normally operable to move the auxiliary cylinder into engagement with the type and impression cylinder, and other means operable to prevent movement of the oylinderto engage the type and the impression cylinder. o .33. In an attachment for fiat bed presses, an auxiliary cylinder'and its operating parts, in combination with a rock shaft connected to the cylinder operating parts, means for rocking said shaft to dedepress said cylinder and move it horizontally, and means for interrupting the normal rocking of said shaft to leave the cylinder in its non-printing position.

34. In an attachment for printing presses havinga reciprocating type bed and an impression cylinder mounted over the typebed and adapted in normal operation to contactthe type bed, an auxiliary cylinder, its mechanism operable to move same into printing position engaging the type and impres'sion cylinder, and its springs for returning it to non-printing position, in combination with a rock shaft connected to the cylinder operating parts, a cam actuated lever secured to said shaft and operating to rock the same at proper time to move the cylinder into printing position, and to permit the spring devices to return the cylinder to non-printing position.

85. In an attachment for flat bed printing presses an auxiliary cylinder normally held in non-printing position, a rock shaft operatively connected to said cylinder, a latch-carrying lever fixed on said shaft, a cam-actuated lever mounted to swing freely on the hub thereof, a portion of said lever engaging the latch-carrying lever proper to move the same in one direction and engaging the latch to move the lever in the other direction and thereby rocking the said shaft, and means for withdrawing said latch from the path of said free lever to interrupt the rocking of the shaft, as and for the purpose specified.

36. A shaft-rocking device for printing presses comprising a slotted lever keyed to the shaft, a cross bar spanning said slot, a lever swingably mounted on the hub of said slotted lever, a portion thereof entering said slot and engaging the cross piece therein to move the lever in one direction and engaging a latch therein to move the lever in the opposite direction, and means for withdrawing said latch from the path of said lug to stop the rocking of the shaft.

37. A shaft-rocking device for moving printing cylinders, which comprises an intermediate slotted lever keyed to the shaft, a hooked pivoted latch arranged in the slot thereof, a cross bar spanning the slot and spaced from the hooked end of said lever, an outer lever swingably mounted on the hub, said intermediate lever having a lug entering the slot of the intermediate member between the cross bar and hooked end thereof whereby said intermediate leve' and outer lev ir are connected to rock together,

' and a calnifielle r'isely mounted on the rock shaft, a cam roller connected to the latch of said intermediate lever and entering the cam grooves of the cam lever and normally operating to hold the latched lever in the path of said lug on the outer member, and means for shifting said cam lever whereby said lever is carried out of the path of said slot traveling lug, and therebyinterrupting the rocking of the shaft.

In testimony whereof, I have hereunto set my hand, this 15th day of June, 1912, in'the presence of two subscribing witnesses.

THEODOR VVENSEL.

Witnesses APJIIUR W. NELsoN, J GEN R. Lnrnvnn.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents, 7 Washington, D. C.