US637598A - Mechanism for making printing-surfaces. - Google Patents

Description

No. 637,598. Patented Nov. 2|, I899. E. HETT. 1 MECHANISM FOR MAKING PRINTING SURFACES. (Application filed Jan. 3, 1899.)

(No Model.) 8 Sheets$heet I.

WITNESSES: INVENTOR v ATTORNEYd' m: uomus ravens camera-um wAswmomn. n. c.

No. 637,598. I Patented Nov. 2|, I899. E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1599. Model-3 8 Sheets8heet 2,

mu -mill 11 WITNESSES: INVENTQR ATTORNEYJ Patented Nov. 2i, I899. E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets8haet 3.

(No Model.)

INVENTOR WITNESSES:

- ATTORNE J Patented Nov. 2|, I899.

E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets-Sheet 4.

(No Model.)

INVENTOR WITNESSES:

. ATTURN EYJ TNC Noam: vmws 90.. PHOTO-LITNO wnsumwon. a c,

Patented Nov. 2|, I899. E. HETT. MECHANISM FOR MAKING PRINTING SURFAGES.

(Application filed Jan. 3, 1899;)

8 Sheets-Sheet 6.

(No Model.)

mm M

n" 1 7 u ml 1T Ill.

INVENTOR WITNESSES BY flaw/u W In: news mans ca. PHUTO-LI'YHOJWAI MNGTON D c.

(No Model.)

' Patented Nov. 2|, I899. E. HETT.

MECHANISM FOR MAKING PRINTING SURFACES.

(Applicaltion filed Jan. 3, 1899.)

8 Sheets-Sheet 7. 4

TNE mama mks co. wmTO-uTNO" WASHINGTON D4 No. 637,598. Patented Nov. 2|, I899.

E. HETT. MECHANISM FUR MAKING PRINTING SURFACES.

(Application filed Jan. 3, 1899.)

8 Sheets-Sheet 8.

(No Model.)

WITNESSES:

' ATTORNE d YHE NORRIS wzrns ca. uo'ro-ufm., WASHINGTON n. c.

PATENT EDWARD HETT, OF NEW YORK, N. Y.

MECHANISM FOR MAKING PRINTING-SURFACES.

SPECIFICATION forming part of Letters Patent No. 637,598, dated November 21, 1899.

Application filed January 3, 1899.

To all whom it may concern:

Be it known that I, EDWARD HETT, a citizen of the United States, and a resident of New York, (New Dorp,) in the county of Richmond, State of New York, have invented Mechanism for Making Printing-Surfaces, of which the following is a specification.

This invention relates to a machine adapted for use in making printing-surfaces, whether planographic, relief, intaglio, or other printing surface.

The object of the invention is to provide a machine whereby printing-surfaces may be accurately and economically made in accordance with my new process as set forth in an application filed by me on November 2, 1898, Serial No. 695, 281, and also in accordance with my new process set forth in an application filed by me October 4,1899, Serial No. 732,439.

The machine embodying the present inven- Serial No. 700.922. (No model.)

broken away. Figs. 9, 10, 11, and 12 illustrate diagrammatically the progressive steps in the cooperation of turning over the con veying-surface from its support upon the secondary surface. Fig. 13 is a sectional elevation of the primary surface seated on its support.

Referring now more particularly to the various features and combinations of features embodying the invention, as shown in the mechanism illustrated in the drawings, 1 and 2 are respectively the primary and secondary surfaces. They are cylindrical in form and are preferably continuous and removable from their respective supporting-cylinders 3 and 4. The primary surface 1 has an accurate preostablished seat in the machine, so that it and successive primary surfaces may be mounted therein in accurate predetermined position both longitudinallyand transtion is organized to bring 1nto cooperation a primary surfacei. (2., a surface developed and capable of printing--a conveying-surface adapted to receive an imprint of the design of the primary surface, and a secondary surface-4'. e., a surface adapted to be made into a printing-surface. These three surfaces are arranged and designed to cooperate in such a way that the primary surfaceprints its design upon the conveying-surface and the conveying-surface imparts the same design upon the secondary surface. The sec-. ondary surface is then developed and becomes a printing-surface, or the secondary printing-surface, as the secondary surface when developed will be herein called.

The invention consists of the features and combinations of features hereinafterset forth.

In the drawings forming part of this specification and in which like reference characters indicate corresponding parts throughout the various views, Figure l is a side elevation of a machine embodying this invention. Fig. 2 is a plan view. Fig. 3 isa vertical sectional elevation on the line 3 3 of Fig. 2. Fig. 4 is a vertical sectional elevation on the line at 4 of Fig. 2. Fig. 5 is an end elevation looking in the direction of the arrow 5 of Fig. 2. Fig. 6 is a vertical sectional elevation on the line 6 6 of Fig. 2. Fig. 7 is an enlarged end view of the support for the conveying-surface. Fig.

a side elevation of said support centrally versely. The seat of the primary surface is on the supporting-cylinder 3. The ribs 5, formed on the inner side of a primary surface, and the corresponding longitudinal grooves formed on the supporting-cylinder 3, in which the ribs fita marked rib in a marked groove-determine the transverse or circumferential location. of the primary surface in its seat. The longitudinal position of the primary surface on its cylinder is determined by the collar or stop 3, formed on one end of the support 3, (see Fig. 13,) against which the primary surface accurately fits when mounted in its seat on the support. The arrangement of the primary surface and its support, as shown in Fig. 13, is substantially the same as that of the printing-form shown and described in my pending application, Serial No. 537,582, filed February 7, 1895. Thus prestablished guides for quickly and accurately seating the primary surface are provided. Of course Various other forms of prestablishedguid es for this purpose may be employed. The secondary surface 2 has an accurate preostablished seat on the supporting-cylinder4, in which it and successive secondary surfaces may be mounted in accurate predetermined position both longitudinally and transversely and with reference to prestablished guides, these guides being the same as those shown and described for the primary surface. 6 designates the ribs of the secondary surface, which fit in the corresponding grooves of the supporting-cylinder. The cylinders 3 and 4 are fixed on the shafts 7 and 8, supported-in boxes 9 and 9 adapted to slide in the oblique recesses 10 and 11 formed in the main frame. The primary surface is provided with an inking-frame 12, carrying inking-rollers supplied from the ink distributing cylinder 13, loosely mounted on the shaft 14, on which the frame 12 is fixed. 15 is a damping-frame carrying damping rollers designed to supply the primary surface with water when required. This damp: ing-frame 15 is pivotally mounted on the shaft. 14. The inking-frame has a segmental gear 17 in mesh with the worm 18, turned by the handwheel19. Thus the inking-frame,with

its inking-rollers, may be moved toand from the primary surface 1. The dampingframe 15 has a segmental gear 20 meshing with a worm 21, turned by the gear 22, which is'actuated by the gear 23, fixed on the hand-shaft 24. Thus the damping-frame,with its damping-rollers, may be moved to and from the printing-surface.

Thesecondary surface 2 is provided with an inking-frame and damping-frame 26,

carrying inking and damping rollers and mounted on the shaft 27 of the main ink-distributing cylinder 28,.the construction andarrangement of these parts being similar to that of the inking and damping frames 12 veying-surface on the support 37.

and 15. The inking-frame 25 has the segmental gear 29' in mesh with the worm 30, turned by the hand-wheel 31. The dampingfra-me 26 has the segmental gear 32 inmesh with the worm 33, turned by the gear 34, which is actuated by the gear 35, fixed on the hand-shaft 36. These devices for moving the inking and dampening frames 25 and 26' are similar to the corresponding devices already described for the inking and dampening frames 12 and 15.

- The support 37 for the conveying-surface 38 is preferably cylindrical in formand is mounted loosely on a rotating shaft 39, supported in the frame of the machine. The support 37 is so arranged that the primary surface and secondary surface may be easily moved to and from it, so as to efiect the desired contact of these surfaces with the-con- I g The support 37" may vary considerablyin shape and arrangement; but it'is preferably constructed, arranged,and equipped as shownin the drawings and as will now be described.

Loosely mounted on the shaft 39 are=two bosses40, having'arms 41, in which slidetlie extensible arms42, carrying a shaft 43, on which is a roll of transfer-paper 44. The bosses 40'have gear-teeth meshingwith the gearsz46 and 47, fixedon the shaft48, carried by the support 37 and turned by thehandwhen moved'out,-so as to bring the roll 44 out ment of the" invention there is shown a haddof its recess 50 in the cylinder 37.- When the catch 54 is released and the roll 44 is moved out and the hand-Wheel 49 is turned, the arms 42 are turned around the shaft 39 and the roll 44 travels over the surface of the cylinder 37 to the grippers 55,which are fixed on a shaft 56. The shaft 56 is provided with a rigidarm 57, having a spring 58 acting upon the arm so as to hold the grippers yieldingly in gripping position. The end of the paper .38vis then brought into engagement with the grippers, and the roll 44 is carrie'd'back and brought to place in its recess 50 59 is arubber blanket stretched permanently over the cylinder 37 and lying beneath the paper 38. When the conveying-surface 38 is thus disposed upon the cylinder, the cylinder is brought into positivev contact with the primary surface and receives an imprint of the design of the primary surface,-the primary surface and the conveying-surface rotating together, the conveying-su rface beginning its contact at its end toward the grippers. After the conveying-surface has received its impressi'on the primary surface and the conveying-surface are separated andthe secondary surface andconveying-surface are brought into contact, beginning at the gripper end of the conveying-surface. Just as the cylinder 37 and the secondary surface begin to rotate in contact the arm 60,*fixed on the grippershaft 56, strikes the end of a lever 61 and opens the grippers to release the paper 38, so that it may be turned over upon the secondary surface. The lever 61 is pivoted on the main frame. It is turned by hand into the position shown in Figs. 10, 11, and 12, so as tobe' out of' the way of the arm when the cylinder 37.rotates in conjunction with the printing-surface. As the rotation continues the earns 62, pivoted on the arms 42 and constuds 64 projecting from the inner sides of the frame of the machine and drive the rod against the knife 64*, fixed on the cylinder 37. This severs' the paper near the roll 44, so that the conveying-surface is free to be turned over fully upon the secondary surface, which may then be separated from the sup-' porting-cylinder 37. The progressive steps of this operation are illustrated in Figs. 9, 1O, 11, and 12. In Fig. 9 the secondary surface is" ready to be brought into contact with the conveying-surface on its cylinder 37'. In Fig. 10 the conveying-surface has been released from thegrippersand has just begun to be turned over upon the secondary surface. In Fig. ll thecams 62 have just met the studs 64- and't'he' conveying-surface is aboutto be severed. I In Fig. 12 the con veying surface has been entirely turned over-upon the secthe cylinder 37 The cylinder 3, carrying the primary surface, is moved toand from the cylinder" 37 by any suitableimeans. In the presentiembgdiceases a lever 65, fixed on a shaft 66, to which are secured arms 67, having links 68 pivotally connected therewith and with toggles 69, which are connected each at one end to the frame and at the other end to the sliding box 9. By operating the lever the cylinder 3 may be moved to and from the cylinder 37 and the requisite pressure exerted between the primary surface and the conveying-surface 38. The secondary surface is similarly provided for the same purpose with a hand-lever 70 on the shaft 71, carryingarms 72, connected by links 73 to the toggles'74, which move the boxes 9.

For the purpose of enabling the primary and secondary surfaces to be removed from the supporting-cylinders hoisting-arms are provided. The hoisting-arms 75 for the primary surface are each provided with a fork 76 at its upper end, in which rests the shaft 7. These arms have also racks 77, which are in mesh with the gears 78 and 79 on the shaft 80. On the shaft 80 is a gear 81 in mesh with a worm 82 on the hand-shaft 83. By turning the hand-shaft 83 the shaft 80 is rotated and the hoisting-arms 75 are moved upward to lift the shaft 7, so that the cylinder 2 clears the frame of the machine, when the primary surface 1 may he slipped off and another primary surface substituted for it. In this operation one end of the shaft 7 is generally supported by an apparatus such as is shown in an application filed by me July 12, 1898, Serial No. 685,764, which permits the fork 76 of one of the hoisting-arms 75 to be turned down out of the Way. If desired, the entire shaft and cylinder 3, with the primary surface carried thereby, may be removed from the machine and another cylinder of like proportions with a new primary surface substituted therefor. The hoisting-arms are of course employed to lower the shaft again in place. For the secondary surface 2 there is a pair of hoisting-arms 84, operated and constructed similarly to the arms 75. These hoisting-arms 84 are operated by the handshaft 85 through worm 86, gear 87, and shaft 88, gears 89 and 90 meshing with the racks 91 on the arms 84. The supporting-cylinders 3 and 4 are located above the supporting-cylinder 37 and move to and from the same on lines coincident with their radii and with the radii of the cylinder 37.

The shaft 39 is the main drivingshaft whereby the cylinder 37 is driven conjointly with the primary surface or conjointly with the secondary surface and whereby the primary and secondary surfaces are driven separately and each in conjunction with its inking and damping rollers. For this purpose the gear-wheel 92 is fixed on the shaft 39 and meshes with a gear 93, fixed on a short shaft 94, which carries the gear 95, meshing with the gear 96, fixed on the shaft 7. The shaft 7 has fixed on it a gear 97, adapted to mesh with a gear 98 on the hub of the cylinder 37 whe/n the primary surface is in contact with the conveying-surface. The short shaft 94 is carried by the toggle-arms 99 and 100, sleeved thereon at their inner ends and at their outer ends sleeved on the shaft 39 and the shaft 7. When the shaft 7 is moved from the cylinder 37, so as to bring the cylinder 3 into position for its primarysurface to be inked or is moved toward the cylinder 37 to bring the gears 97 and 98 into mesh, the toggle-arms 99 and 100 carry around the shaft 94 with its gears 93 and 95, so as to keep them in mesh with the gears 92 and 96, respectively. The toggle-arms 99 and 100 are of such length as to permit the shaft 7 to be lifted by the hoisting-arms 75 high enough to enable the primary surface to he slipped from its cylinder 3. Idle gears 101 and 102, supported on studs projecting from the inner side of the main frame, mesh with each other, and the former meshes with the gear 92 and the latter with the gear 103, fixed on the long hub of the cylinder 13. Thus the shaft 39 operates to drive the main ink-distributing cylinder 13, which drives the other inking-rollers. By means of the gearing described it will be seen that when the shaft 7 is moved from the cylinder 37 the shaft 39 may drive the cylinder 3, carrying its primary surface and also the inking rollers. When the shaft 7, with the primary surface, is moved toward the cylinder 37, the primary surface moves out of contact with the inkingrollers and the damping-frame is moved back out of the way, so that the gears 97 and 98 mesh. Thus the gear 97 through the gear 98 drives the cylinder 37, the primary surface and conveying-surface rotating together in positive contact under suitable pressure for the purpose of printing or imparting the design of the primary surface upon or to the conveying-surface.

The gearing for the secondary surface and its supporting-cylinder and for the inkingrollers is constructed and arranged in the same way as that just described and need be only briefly referred to. The gear 92 meshes with the gear 104 on the short shaft 105, which carries the gear 106, meshing with the gear 107 on the shaft 8. The shaft 8 carries the cylinder 4 for the secondary surface and also a gear 109, adapted to mesh with the gear 98. The toggle-arms 110 and 111 are sleeved at their inner ends on the shaft 105 and at their outer ends on the shafts 39 and 8. The gear 92 meshes with the idle gear 112, which meshes with the idle gear 113, which meshes with the gear 114, fixed on the long hub of the cylinder 28. These idle gears are supported on studs projecting from the inner side of the main frame. The gear-wheels 97, 98, and 109 are so marked that the gear 98 may mesh with the other two always in identically the same way in order that the primary surface and the conveying-surface and the conveying-surface and secondary surface may be brought into accurate predetermined cooperating relation for the purpose of imparting the design from the primary surface IIO surface 38 by operating the lever 65. The" shaft 39 is then rotated and the primary and con veying sur'faces rotate together in positive rolling contact and the design of the primary surface is printed upon the conveying-surface. The primary surface is then separated from the conveying-surface and the secondary surface is brought into positive rolling contact with the conveying-surface and the design carried thereby is imparted tothe sec;

ondary surface, the conveying-surface for this purpose being turned over upon-the secondary' surface. The secondary surface is then separated from the supporting-cylinder 37 v and is suitably developed into the desired sec on dary printing-surfacatheinking and damping rollers in the frames 25 and 26 being prefera-bly usedin this developing operation. The secondary printing-surface is then removed from the machine and is mounted in a press and employed in printing. Of course, if de-' sired, the secondary surface may be removed from the machine and subsequently devel oped, the inking and damping frames, with their rollers, being dispensed with. The same primary surface may be used in making aplurality of identical secondary surfaces suc'ces- I si-vely supported in place in the machine in ondar-y printing-surfaces will be identical and identically placed thereon, and these secondary' printing-surfaces may be and preferably are interchangeable with one another and with their coactin g primary surfaces and con structed and designed to fit in a preestablished seat or seats in a printing-press. A series of primary surfaces designed and constructed for register may be successivelysnpported in definite and predetermined position in the machine-and each employed in making a plu ral'ity of identical secondary printing-sin faces, so that from the series of registering primary surfaces a plurality of series of registeri-ng secondary printing-surfaces may be made. The supporting-cylinders 3 and 4 are preferably identical, as shown, and it is evident that instead of supporting the primary and secondary surfaces on separate cylinders the primary surface, after printing on the.

conveying-surface, may be removed and asecondary surface substituted'therefor onthe same cylinder and be brought into coaction with the conveying-surface, having the de sign of the primary surface printed thereon.

In this way the' secondary printing-surface may be made identical with the primary surface with the same accuracy as where the pri mary and secondary surfaces are supported on their different cylinders- It Will be seen' that when the primary and secondary su'r faces attest-primed on the same cylinder they" on the separate cylinders, they are supported in equivalent definite and predetermined 00- operating relation with respect to each other and with respect to the-conveying-surface. The successive primary surfaces are arranged in the same position" and in thesamerelation with respect to the support for the convey i-ng-surface or with respect to the successive conveying surfaces carried thereby.- The same is true in regard to the successive secondary surfaces. The successive coacting primary and secondary surfaces are, moreover, arranged in the same relation with respect to each other.

It will be noted that this invention makes it possible to dispense with the employment of a separate basic surface heretofore required in making each printing-surface and that great economy is effected in time and labor and painstaking care heretofore required in making'prin'ting-surfaces, especially printing-surfaces designed to register,

as in multicolor-printing.

; Instead of using a'separate and fresh concourse use a permanent conveying-surface, suchas a sheet of rubber.

The primary and secondary surfaces may be made of any suitable material, but are & preferably made of metal, which may be electrolytically deposited upon a suitable base.

I- prefer to electrolytically deposit zinc upon 5 copper.

In'developing the primary and secondary surfaces-any suitable method may be used-such' as light or deep etching, routing out, &c.'and they may be d'evoloped so as .1- o be planographic, relief, intaglio, or otherwise. The primary and secondary surfaces maybe difieren'tly or similarly developed.

While it is of course important that the rolling contact ofthe conveying-surface with the primary and secondary surfaces be positive' -that is, without slipping-it is not essential that intermeshing gears be employed for this purpose. Other means may be employed to accomplish the result and to drive the bodies inunison and the intermeshing gears may be dispensed with. Again-,while I make use of a marked tooth and a marked vrecess in the'intermeshing gears'as preestablished guides to bring the primarysurface and conveying surfaceand the secondary surface and conveying surface into accurate predetermined cooperating relationit will be obvious that various other devices may be used for thispurposer Various changes may be made in the mechanism herein shown and described for operating the primary, secondary, and conveying surfaces, and' various changes maybe made in the shape and arrangement of the primary,-scondary,ana conveying surfaces nd various features may be employed apart from the others and in diiferent relations.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a machine adapted for use in making printing-surfaces, the combination of a drum adapted to carry a conveying-surface mounted loosely on the driving-shaft so as to rotate thereon, a cylinder adapted to carry a printing-surface movable to and from said drum, whereby the printing-surface and conveyingsurface may be brought together in operative contact and separated, intermeshing gearing connecting said cylinder and drum, and intermeshing gearing connecting the drivingshaft and said cylinder arranged to maintain its connection when said cylinder is moved to and when it is moved from said drum, whereby said cylinder and said drum may be driven together from the driving-shaft and whereby said cylinder may be driven from the driving-shaft when separated from said drum.

2. In a machine adapted for use in making printing-surfaces, the combination of a drum adapted to carry a conveying-surface mounted loosely on the driving-shaft so as to rotate thereon, a cylinder adapted to carry a printing-surface movable to and fromsaid drum, whereby the printing-surface and conveyingsurface may be brought together in operative contact and separated, intermeshing gearing connecting said cylinder and dru m,intermeshing gearing connecting the driving-shaft and said cylinder arranged to maintain its connection when said cylinder is moved to and when it is moved from said drum, whereby said cylinder and said drum may be driven together from the driving-shaft and whereby said cylinder may be driven from the driving-shaft when separated from said drum, and a movable frame carrying inking-rollers adapted to cooperate with the printing-surface on said cylinder.

3. In a machine adapted for use in making printing-surfaces, the combination of a main driving-shaft and drum adapted to carry a conveying-surface and loosely mounted thereon, twocylinders adapted to carry primary and secondary surfaces and mounted in sliding boxes, whereby the said cylinders may be moved to and from said drum, gearing connectin g each of said cylinders with said drum, whereby when either cylinder and the drum are brought together they may rotate positively together, gearing connecting the driving-shaft with each of said cylinders arranged to maintain its connection when said cylinders are moved to or from said drum, and means for moving each of said cylinders to and from said drum and thereby meshing and unmeshing the gearing connecting said cylinders with said drum, whereby either of said cylinders may be driven separately or in conjunction with said drum.

4. In a machine adapted for use in making printing-surfaces, the combination of a main driving-shaft and drum adapted to carry a conveying-surface and loosely mounted thereon, two cylinders adapted to carry primary and secondary surfaces and mounted in sliding boxes, whereby the said cylinders may be moved to and from said drum, gearing connecting each of said cylinders with said drum, whereby when either cylinder and the drum are brought together they may rotate positively together, gearing connecting the driving-shaft with each of said cylinders arranged to maintain its connection when said cylinders are moved to or from said drum, means for moving each of said cylinders to and from said drum and thereby meshing and unmeshing the gearing connecting said cylinders with said drum, whereby either of said cylinders may be driven separately or in conjunction with said drum, and swinging frames carrying inking-rollers for said primary and secondary surfaces.

5. In a machine adapted for use in making printing-surfaces, the combination of a drum adapted to carry a conveying-surface mounted loosely on the driving-shaft so as to rotate thereon, a cylinder adapted to carry a printing-surface movable to and from said drum arranged to slide obliquely in the main frame, whereby the printing-surface and conveyingsurface may be brought together in operative contact and separated, intermeshing gearing connecting said cylinder and drum, intermeshing gearing connecting the driving-shaft and said cylinder arranged to maintain its connection when said cylinder is moved to and when it is moved from said drum, whereby said cylinder and said drum may be driven together from the driving-shaft and whereby said cylinder may be driven from the drivin shaft when separated from said drum, and hoisting-arms for lifting said cylinder from its working place in the machine.

6. In a machine adapted for use in making printing-surfaces, the combination of a main driving-shaft and drum adapted to carry a conveying-surface and loosely mounted thereon, two cylinders adapted to carry primary and secondary surfaces and mounted in sliding boxes arranged to slide obliquely in the main frame to and from said drum, whereby the said cylinders maybe moved to and from said drum, gearing connecting each of said cylinders with said drum, whereby when either cylinder and the drum are brought together they may rotate positively together, gearing connecting the driving-shaft with each of said cylinders arranged to maintain its connection when said cylinders are moved to or from said drum, means forvmoving each of said cylinders to and from said drum and thereby meshing and unmeshing the gearing connecting said cylinders with said drum, whereby either of said cylinders may be driven separately or in conjunction with said drum, and hoisting-arms whereby said cylinders may be lifted from their working places in the machine.

6 i- I Q a 637,598

7. In a machine adapted for use in making. printing-surfaces, the combination of a drum I adapted to carry a conveying-surface mounted driving-shaft and when separated from said drum, hoisting-arms for lifting said cylinder from its working place in the machine, and a swinging frame carrying inking-rollers for said printing-surface. c v

. 8. I In a machine adapted for use in making printing-surfaces, the combination of a main driving-shaft and drum adapted to-carry a conveying-surface and loosely mounted thereon, two cylinders adapted to carry primaryand secondary surfaces removable therefrom .and mounted in sliding boxesarranged to slide obliquely in the main frame to and from said drum, whereby the said cylinders may be moved to and from said drum, gear-ingconnectin g each of said cylinders with said drum, whereby when either cylinder and the drum are brought together they may rotate positively' together, gearing connecting the driving-shaft with each of said cylinders arranged to maintain its connection when said cylinders are moved to or from said drum, means for moving each of said cylinders to and from said drum and thereby meshing and unmeshing the gearing connecting said cylinders with said drum, whereby either of said cylinders may be driven separately: or in conjunction with said drum, and hoisting-arms whereby said cylindersmay be lifted fromtheir work ihgplabes in the'machine. v r

ln testimony whereof I have signed my 'nameto this specification in the presence of two subscribing witnesses.

. EDWARD HET'I, Witnesses:

G. W. DONALDSON,

, EDWIN SEGER.

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