US2053510A - Intaglio printing machine - Google Patents

Description

R. W. BENDER INTAGLIO PRiNTING MACHINE Sept. 8, 1936.

Filed Jan. 21, 1955 7 Sbe-ets-Sheet l v INVENTOR, Robe/'7 Vl/. Bender? BY I %y/ ATTORNE p 1936- R. w. BENDER 2,053,510

INTAGLIO PRINTING MACHINE Filed Jan. 21, 1935 7 Sheets-Sheet 2 Fly. 2.

INVENTOR,

Robe/"2 14 Bender:

ATTORNEYS.

Sept. 8, 1936.

R.'w. BENDER 2,053,510

INTAGLIO PRINTING MACHINE Filed Jan 21, 1955 7 Sheets-Sheet 3 INVENTOR',

I Babe/'7 W Benz/en W ATTORNEYJI Sept. 8, 1936. R w, BENDER 2,053,510

INTAGLIO PRINTING MACHINE Filed Jan. 21, 1935 7 Sheets-Sheet 4 /68 ll I m4 m2 76 88 1 I /94 INVENTOR,

Robe/'2 VM Bender? ATTORNEYS,

Sept. 8, 1936. R. w. BENDER INTAGLIO PRINTING MACHINE Filed Jan. 21, 1955 '7 Sheets-Sheet 5 INVENTOR, Robe/"7 W Ba/Me/I ATTORNEYS.

p 1936- R. w. BENDER 2,053,510

- INTAGLIO PRINTING MACHINE Filed Jan. 21, 1935 7 Sheets-Sheet 6 4 INVENTOR; Robe/'7. I IZBe/Men P 1936- R. w. BENDER INTAGLIO PRINTING MACHINE Filed Jan. 21, 1935 .7 Sheets-Sheet 7 78 Bay. 16;

Rube/'7 VM gn ATTORNEYS.

Patented Sept. 8, 1936 UNITED STATES 2,053,510 INTAGLIO PRINTING MACHINE Robert W. Bender, Kansas City, Mo., assignor to Inter-Collegiate Press, Kansas City, Mo., a corporation of Missouri Application January 21,1935, Serial No. 2,700

15 Claims.

The present invention has reference to intaglio printing machines of the type wherein an intaglio printing plate of conventional character might be employed and the primary object of the invention is the provision of such equipment as will 'permit the production of work of a like or better quality than is produced by the ordinary handoperated press, yet with greater speed and in a V manner that will allow the manufacture of intaglio printed stock at a figure that is relatively low for printing of the class which the present machine is susceptible of creating.

Another important aim of this invention is the provision of an intaglio printing machine which employs an arcuate plate disposed in relation to a reciprocating bed in such a manner as will permit the printing of stock in a rapid, continuous manner to the end that quantity and quality production of printing is accomplished through relatively inexpensive equipment.

A further important object of the invention is to provide in'an intaglio, printing machine of the aforementioned character, unique, novel and effective mechanism for carrying out the broader objects of the invention, which mechanism comprises special inking and wiping structure for the printing plate and apparatus for driving and actuating the parts of the .machine in a way which will cause the printing plate to be inked a predetermined number of times prior to wiping before the plate is brought into engagement with the stock being'printed.

Another important object of the invention is to provide strong and efiective operating structure for the reciprocating bed, which structure is simple, effective and eliminates objectionable stopping and starting to reverse the path of travel of a large number ofparts, as is the case in most machines where a reciprocating bed forms a part of the mechanism.

An even further object of theinvention is to provide specially formed and novel clamping means for the intaglio printing plate, which means may be mounted upon a rotating cylinder so that the said plate is caused to move through a path of travel concentric with the axis of said cylinder.

Heretofore intaglio printing has been accomplished through the employment of substantially planar plates and the process has generally been slow to insure high quality work. The art of intaglio printinghas not been associated to anyappreciable extent with large quantity production and usuallybut a single printing plate has been employed in the'pri'nting press. This invention contemplates the use of a'large number of rela-v tively small intaglio printing plates, each of which may serve to print a given area on a piece of stock that may be later trimmed and cut to produce units of a different character.

In actual practice, for example, the producer of intaglio printed calling cards may cut the manufacturing cost for such cards an appreciable amount if several are produced at once in the printing machine embodying this invention. Mass production of intaglio printed stock is possible through the employment of this machine, but its nature is such that a relatively small volume of a single printed card or the like may be turned out at a cost far less than that of the conventional type hand-operated press.

Minor structural details found in the intaglio printing machine are oftentimes important,and where such is the case, thesame form some of the objects of the invention. a a

"One embodiment of the invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a front elevation of an intaglio printing machine made in accordance with the present invention.

Fig. 2 is a side elevation of the machine.

Fig. 3 is a rear elevation of the intaglio printing machine.

1 :Fig. 4 is a plan view of the other side of the machine. v a

Fig. 5 is a vertical section through the intaglio printing machine, taken on line 5-5 of Fig. 1, looking in the direction of the arrow. Q

1 Fig. 6 is an enlarged, fragmentary, detailed, sectional view through a portion of the frame illustrating the manner of supporting the wiping material roller.

Fig. 7 is a similar view taken on line 1-1 of Fig. 6, and looking in the direction of the arrow.

Fig. 8 is a fragmentary sectional view taken on line 88 of Fig. 7.

' Fig. 9 is an enlarged, fragmentary, sectional view illustrating a portion of the clutch which periodically advances the wiping material. a

Fig. 10 j is a fragmentary, detailed section through the clutch, taken on line I0-lll of Fig. 9. Fig. '11 is a fragmentary, vertical section through the lower portion of the machine, taken' on line l|--I| of Fig. l and looking in the direction of the arrow.

Fig.lZ is across section through the platesupporting cylinder.

Fig. 13 is a sectional view through the plate holder and supporting cylinder, taken on line l3-l3 of Fig. 12.

Fig. 14 is a plan view of the gripper mechanism that is mounted upon the face of the reciprocating bed at one end thereof.

Fig. 15 is an enlarged, fragmentary, sectional view taken on line I5I5 of Fig. 14.

Fig. 16 is a fragmentary, detailed, sectional view showing relation between printing plate and clamp, and,

Fig. 17'is a fragmentary, sectional view through a portionof one of the shafts illustrating the manner of frictionally engaging the same to advance the wiping material.

'When constructing an intaglio printing machine embodying this invention, rigid support should be afforded all of the hereinafter mentioned working parts. It' has been found satisfactory to provide a pair of side frames 28 that may be anchored to the floor and which are joined near their bottom by bolsters 22, one of which is centrally disposed and underlies the reciprocating bed 24 whichis mounted upon rollers 26 carried by upper surface of supports 28 on the top of impression brackets 30. These brackets 30 overlie bolster 22 and serve to absorb the force exerted as the impression is made on the stock being printed. Suitable bearing members 32 carried at the top of frames 20 complete the foundation structure of the intaglio printing machine and all of the parts are actuated through the medium of main shaft 34 which may be driven by asuitable motor or connection to any other source of power not here shown.

Bed 24 is reciprocated along a rectilinear path of travel by novel means comprising a bracket 36 which depends from the bottom of bed 24 and to which is pivotally mounted a plate 38, having formed thereon a continuous rack 46 having its teeth in engagement with pinion 42 keyed to main shaft 34, as shown in Fig. 5.

A compensating spring 44 assists in counterbalancing the weight of plate 38 and the rack 40 should be formed substantially as illustrated so that there is provided a triangular circumscribing row of teeth to mesh with pinion 42 as the rack travels around the latter. To insure that pinion and rack remainin constant interengagement, there is provided a stationary race 46 mounted upon impression brackets 30 so as to receive the roller 48 that is pivotally mounted upon an extension 58 formed on plate 38. As pinion 42 is driven, plate 38 will be raised and lowered about pivotal point'52 and moved to and fro for the purpose of reciprocating bed 24.

Means is provided for receiving the stock to be intaglio printed and this mechanism is mounted directly on the top of bed 24. A counter block 54 is held in position by counter'blockclamp 56 and its bolt 58 which is in screw threaded engagement with an internally tapped socket formed in bed 24. The usual feed guides 60 serve as stops for one edge of the stock being engraved. This stock 62 may have areas 64 set off thereon, wherein to receive the ink from the hereinafter described intaglio. printing plate. In the instance illustrated, seven separate areas to receive the impression are set off and when stock 62 isproperly trimmed, seven cards of the conventional type are cut therefrom. A gripper shaft 66 is rotatablyv supported by blocks'68 and a spring III, which normally urges shaft 66 to a position where grippers I2 are raised, ,is wound about shaft 66. Arms14 secured to shaft 66 are joined by connecting bar I6 and a roller I8- mounted upon one of arms 14 is struck by a stationary gripper cam 80 when bed 24 is moved rearwardly. When roller I8 and gripper cam 80 come into engagement, all of the grippers and associated parts are forced down to hold stock 62 rigidly against counter block 64 as the impression is made.

There is a track 82 along each side of bed 24 for the impression bearers 84, each of which is integral with cylinder 86, which serves as the main support for the intaglio printing plates.

The intaglio printing plate assembly, including cylinder 86, is carried by blocks 88 slidably mounted in a slot 98 formed in the two frames 2!). Cylinder 86 is rotatably journalled in these blocks 88 and adjustment is allowed through the medium of similar mechanism at each end of cylinder 86. A spring 92 beneath block 88 has one end supported upon a shouldered nut 94 that may be moved along screw 95 to' vary the tension of spring 92. The intaglio printing plate 98 is uniquely held upon cylinder 86 by a plate holder or collar I00. This collar is split to form two co-operating parts, one of which is keyed as at I82 directly to cylinder 86 and holds plate 98 in a desired position. The other part of collar I0!) is removably bolted to the first mentioned part as at I84 and it is obvious that adjustment longitudinally along cylinder 86 might be effected by the manipulation of these bolts.

The intaglio printing plate per se is novel in form. It is arcuate so that its face is concentric with the axis of cylinder 86. The convex face of plate 98 is engraved in the well known manner and this plate is adjustably and removably held against the arcuate face I06 on that portion of collar I60 which carries opposed clamps I08. These opposed clamps are specially formed so that their arcuate edges will be inturned to form agripping jaw IIO that bears against the arched edge of plate 98. These clamping plates are held in position by bolts I I2 and the bolts in opposite plates should be staggered to produce a positive grip upon the plate. As shown in Fig. 12, the ends of arcuate plate 98 are turned inwardly to produce an abrupt curve II4, to the end that when stock and plate come in contact, there will be no objectionable edge present to produce an undesirable result. Y

Cylinder 86 and all of the intaglio printing plates andparts associated therewith are rotated constantly so long as'shaft 34 is being actuated. Any suitable train of gears or the like may be employed to transmit rotating motion to cylinder 86, but in the instance shown, cylinder 86 may be turned down at one end to provide a stub shaft I I6 to receive gear I I8 that is in mesh with gear I28 mounted upon a short shaft I22 which is journalled in a bearing formed by one of the frames 28. This gear I20is in turn in mesh with pinion I24 that is keyed directly to main shaft 34. I

Apparatus is provided for rendering effective the intaglio printing plates carried by cylinder 86.- This means is formed in such fashion as to insure that periodic impressions will be made so long as the manually controlled operating lever I 26 is moved to the set position. A main cam is employed to periodically raise and lower cylinder 86. This cam is mounted upon a short shaft I28 which passes through and is journalled for rotation in one of frames 28 and movement is'imparted thereto through pinion I30 mounted upon shaft I22 that is in mesh with gear I32, keyed or otherwise secured to shaft I28. This main cam I34 keyed to shaft I28 is contoured substantially-as shown in Fig. 2 so that practically one-third of its circumference is higher or a greater distance from its axis than. the remaining. two-thirds of its circumference.- A roller I 36 mounted on the free end of a bell crank lever I38 rides over the face of cam I34. This roller I36 is mounted upon one of the legs of lever I 38 and the bifurcated head I 40 is in engagement with the other leg of lever I38 so that as roller I36 is moved toward and from the axis of shaft I28, the head I40 of connector I42 will be raised and lowered if head I40 has been moved toward the free end of the associated leg of lever I38 and against the transverse stop pin I44 provided to preclude head I40 from moving entirely out of relation with this member.

To set this bifurcated head I40 of connector I42 where it will be raised and lowered, the operating lever I26 is moved by the operator so that link I46 attached to lever I26 will move bell crank lever I48 around pivotal point I50 for the purpose of moving another link I52 in the direction of the arrow shown in Fig. 11. One end of link I52 is pivoted to the depending leg of bell crank lever I48 while the other end is connected to the upper end of connector I42 adjacent the bifurcated head I40 thereof. 7

A shaft I54, journalled in brackets I56 carried by frame 20, is joined to connector I42 by an ear I58 so that as connector I42 is raised and lowered, shaft I 54 will be oscillated. This movement is imparted to rods I60 through the medium of a similar ear I62 and a spring I 64 urges all parts of this throw-off assembly to a position where roller I36 will be in engagement with the face of cam I34. While the lower end of rod I60 is joined to shaft I 54, its upper end is 'attached to arm I66, one end of which is secured to one of two articulated toggle members I68 that are interposed betweenthe upper side of block 88 and the adjusting screw I10. Obviously, as rod I60 is drawn down, toggles I68 will be straightened out and cylinder 86 will be forced down to the'operative position. A stop arm I72, having the necessary and suitable adjusting screw "4 thereon, is provided to maintain these throw-off parts in the proper relation, and when the cross pin I16 extending-through bifurcated head I40 engages detent I18, there is an assurance that connectorv I42wil1 not be forced back to an inoperative position. V

The inking mechanism in this machine is constructed in a manner similar to the conventional type of ink fountains in that there is a pan I mounted upon frames 20 rearwardly of cylinder 86. A pair of steel fountain rollers I 82 and I84 respectively have their cylindrical faces in contact and a plate roller I86 formed of relatively soft material is rotatably supported by bell crank levers I88 at each end thereof. A spring I90 maintains this roller in contact with steel roller I84 and the surface of this roller I86 always rides over the arcuate convex face of plate 98 as cylinder 06 is rotated. Ink from pan I80 is drawn therefrom by roller I84 and this last mentioned roller-is rotated by frictional engagement with roller I82 that is positively driven through the medium of a train of gears. This train of gears includes gear I92 which is keyed to shaft I94 and gear I92 is in mesh with gear I96 that is rigid to shaft I98, which in turn is driven by sprocket 200 mounted on shaft I98. Sprocket 200is constant- 1y driven by, chain 202 which not only engages the teeth of sprocket 200, but is. in .engagement with the teeth of sprocket pinion 204 mounted upontmain. drive shaft 34.- p

The wiping material employed in the machine isstrip' stock carried by suitable rollers and periodically 'advanced and brought, into wiping en gagement with the'concave facesof the intaglio printing plates 98. The fresh wiping material 206 is introduced to the machine by threading a bolt thereof on shaft 208 that is rotatably journalled in'the uppermost bearing brackets 32. Feeding rollers 2I0 and 2I2 respectively are employed and a wiping roller 2I'4 engages the wiping material 206 when it is forced against the faces of the engraving plates 98. The material 206 is threaded as shown in Fig. 5 and finally is wound upon shaft 2I6 that is periodically rotated, as will be hereinafter more fully set down.

Frictional breaking means 2I8 of the conventional drag'type may be employed and move.- ment of the weight 220 toward and from the pivotal point 222 will accomplish the desired result with respect to greater or lesser friction upon the roll of fresh wiping material.

In order to present a clean-wiping area, the material 206 is periodically advanced as the machine is operating. To accomplish this result, the driving force from main shaft 34 is transmitted to shaft 2 I6 through driving means which includes the clutch illustratedin Figs. 9 and 10. Sprocket chain 224 establishes a driving connection between shafts 2I6 and one end of roller 2I0 which carries sprocket 226. The other end of roller 2 I0 carries sprocket 228 that is engaged by sprocket chain 230 which is in -mesh with the teeth of sprocket wheel 232 freely mounted upon shaft I98 adjacent gear 200, which is directly driven by sprocket chain 202, as before set down.

Clutch mechanism 234 establishes a driving connection between sprocket 200 and sprocket 232 and to effect this connection at the proper time, clutch mechanism 234 is periodically brought into play by the rocker arm 236 which is actuated by connecting rod 238, which is reciprocated by [a small cam 240 mounted upon shaft I28. Ob-' viously, this cam and associated mechanism is properly timed sothat the clutch will be thrown at the proper instant to advance the wiping material. v

To establish connection between cam 240 and connecting rod 238, an arm 242 ispivotally secured to lower end of rod 238 and this arm is joined to a bar 244 by a stub shaft 246 that is journalled in plate 248. One end of bar 244 carries a roller 250 that rides over the, face of cam 240 and a spring 252 holds roller andfcam face in engagement. As roller 250 moves toward'the axis of shaft I28, stub shaft 246 will be slightly turned about its axis, the outer end of arm 242 will be lifted and rocker arm 235 will move the upper ends of fingers 254 inwardly so as to cause spool 256 to force one end of triggers 258 outwardly. The other end of each trigger respectively is integral with squared shaft 260 which is positioned between clutch shoes 262 and when these squared shafts are twisted by the outward movement of triggers 258, clutch shoes 262 wi1l be forced outwardly against the inner face of the tubular hub 284 that is integral with sprocket 232. Thus this said sprocket willbe advanced so as to draw the wiping material 266 from shaft 208 to shaft 2I6.

The aforementioned mechanism is employed merely to advance the wiping material from the forward to the rear roller so'that a fresh area will be adjacent the intaglio printing plates in the event roller 2 is actuated to bring together the wiping material and the convex face of the intaglio printing plate. I

Cam I34 is employed to move roller 2 to the operative position where the intaglio printing plate or plates will be wiped. Ro11er2 i4 is carried by a yoke 266, the ends of which are slidably"mount ed in the frames 20and a spring 268 is interposed between a shoulder formed upon the two opposite frames ZO-and a part of yoke 266. A shaft 21.0 journalled in frames 20 has at least one laterally extending arm 21.2 which overhangs yoke 266. There is preferably one of these arms 212 at each end of roller 2 and when shaft. 210 is slightly rotated, the downward force exerted upon yoke 266 by. arms 212 will compress springs 268 and move roller 2 and the overlying wiping material 206 toward the rotating intaglio printing plate 98. 'This shaft 210 is periodically operated so as to move roller 2M to the operative position by the arm 214 secured to one end of shaft 210 and attached to one end of rod 216 which has its other end secured to bell crank lever 218, pivotally mounted as at 286 directly to frame 20. A roller 282 on bell crank lever 2,18 rides over the face of cam I36 and as the machine is operated, rod 216 will be reciprocated to move roller 2 as mentioned.

A spring 286 serves to hold roller and cam 2 82 and H4 respectively in engagement. A tens oning bar 286 may be associated with the roller moving mechanism so as to impartthe proper tension to material 206. This bar extends transversely across the machine beneath the roll of fresh material and springs 283 serve to draw the tensioning bar against the strip of wiping material. A friction driving connection. between chain 224 and shaft .2l6 is preferably included so that thedriving force exerted will be released after a predetermined tension has been brought about. This frictional drive is detailed in Fig. 17 and consists merely of frictional faces 296 establishing connection between shaft 216 and sprocket 282 that is driven by chain 224, A spring 294 with an adjusting nut 296 thereagainst varies the frictional engagement between faces 290.

In the operation of the machine all of the cams and other important operating parts should be timed to permit the proper relative action, and in the employment of the machine exemplified, intaglio printing plates 98 are brought into engagement with the inking mechanism twice before the convex faces are wiped, which wiping occurs immediately prior to lowering of cylinder 86 so that an impression is made. So inking the plates insures a positive filling of the crevices formed in the intaglio printing plate and it is to be observed further, that as the intaglio printing plates are rotated about the axis of cylinder 86, wiping material 266 is moved into engagement and then drawn along in a direction opposite to the direction of travel of the intaglio printing plate itself. It is obvious further, that any nume ber of intaglio printing plate holders mi ht be mounted by cylinder 85 and that the size of the intaglio printing plate might be altered as desired.

Manifestly, a large number of modifications with respect to specific structural details might be incorporated in the machine to accomplish the results which are attained through the use of that mechanism illustrated and described.

Having thus describedthe invention, what is claimed as new and desired to be secured by Letters Patent is:

1. An. intaglio printing machine comprising a bed to .carrythe stock being printed; means for reciprocating the said bed; an arcuate printing plate at one side of. the bed; means to rotate the said plate; and apparatus for periodically moving the printing plate toward and from the bed as rotation and reciprocation respectively take place.

.2. An intaglio printing machine comprising a bed to carrythestock being printed; means for reciprocating the said bed; an arcuate printing plate at one side of the bed; means to rotate the said plate; inking means for the said arcuate. printing plate; and apparatus for periodically moving the printing plate toward and from the bedas rotation and-reciprocation respectively take place, said apparatus adapted to move the rotating Printing plate toward; and from the reciprocating bed between each of a series of a plurality of inking engagements with the said inking means.

3. In an intaglio printing machine of the character described, movable printing plates; inking means for the plates; 2- bed for the stock being printed; and apparatus for moving the printing plates toward and from the bed between each of a series of a plurality of inking engagements with the said inking means.

4. An intaglio. printing machine comprising a bed to carry the stock being printed; means for reciprocating the bed; an arcuate printing plate at one side'of the bed; means to rotate the said plate; inking means for the said arcuate printing plate; wiping material for the said printing plate; and apparatus for periodically moving the printing plate toward and from the bed as rotation and reciprocation respectively take place.

5. An intaglio printing machine comprising a bed to carry the stock being printed; means for reciprocating the bed; an arcuate printing plate at one side of the bed; means to rotate the said plate; inking means for the said arcuate printing plate; wiping material'for the said printing plate; and apparatus for periodically moving the printing plate toward and from the bed as rotation and reciprocation respectively take place, the wiping material and printing plate being periodically moved to inter-engagement by said apparatus, between the inking actions and prior to lgniiving the said printing plate toward the said 6.An intaglio printing machine comprising a bed to carry the stock being printed; means for reciprocating the bed; an arcuate printing plate at one side of the bed; means to rotate the said plate; inking means'for the said arcuate printing plate; wiping material for the said printing plate; and apparatus for periodically moving the printing plate toward and from the bed as rotation and reciprocation repectively take place, the wip ing material and printing plate-being periodically -moved to inter-engagement by said apparatus between each of a series of at least two inking engagements with the said inking means and prior to moving the said P g plate toward the said bed.

7, An intaglio printing machine comprising a bed to carry the stock being printed; means for reciprocating the bed; an arcuate printing plate at one side of the bed; means to rotate the said plate; inking means for the said arcuate printing plate; wiping material for the said printing plate; and apparatus for periodically moving the printing plate toward and from the bed as rotation and reciprocation respectively take place; the wiping material and printing plate being periodically moved to inter-engagement by said apparatus, between each of a series of at least two inking actions and prior to moving the said printing plate toward the said bed, said wiping material and printing plate being disposed to move in relatively opposite directions during their period of inter-engagement.

8. An intaglio printing machine comprising a bed to carry the stock being printed; means for reciprocating the bed; an arcuate printing plate above the said bed; means to rotate said arcuate printing plate about an axis concentric with the convex surface of said plate; inking means for the said arcuate printing plate; wiping material for the said printing plate; and common apparatus for periodically and alternately moving together the said printing plate and wiping material, and the said printing plate and reciprocating bed; said common means serving to move the printing plate to and from said bed. 7

9. In an intaglio printing machine of the character described, a reciprocating bed to carry the stock; an arcuate rotatable printing plate; means to support the said printing plate for rotation about its axis; apparatus for moving the said supporting means toward and from the said bed; inking means for the printing plate; and wiping material for the plate, the face of the bed being in tangential relation to the convex face of said printing plate at one end of the path of travel of the supporting means, and said wiping material and convex face of said printing plate being in tangential relation at the other end of the path of travel of said supporting means.

7 10. In an intaglio printing machine of the character described, a reciprocating bed to carry the stock being printed; an arcuate printing plate rotatably mounted above said bed; apparatus for moving said plate toward and from the said bed as the same is being rotated; means for applying ink to said printing plate; means for wiping said printing plate at one end of its path of travel; and driving structure for the bed comprising a driving pinion, a plate on the bed, a rack on the plate disposed in an endless path, a roller on the plate, and a race for the roller to maintain pinion and rack in mesh.

11. In an intaglio printing machine of the character described, a bed to carry the stock being printed; a driving pinion; a plate pivotally joined at one end to said bed; an endless rack on the plate in mesh with the pinion; and means for maintaining pinion and rack in mesh as the former travels along the endless path formed by the latter.

12. In an intaglio printing machine of the character described, a bed to carry the stock being printed; a driving pinion; a plate pivotally joined to said bed; an endless rack on the plate in mesh with the pinion; and a guide for maintaining pinion and rack in mesh as the former imparts movement to the latter.

13. In an intaglio printing machine of the character described, a bed to carry the stock being printed; a driving pinion; a plate pivotally joined to said bed; an endless rack on the plate in mesh with the pinion; a roller on the plate; and a stationary race for the roller whereby the pinion and rack are maintained in mesh as the former imparts movement to the latter.

14. In an intaglio printing machine of the character described, a reciprocating bed to carry stock being printed; an intaglio printing plate periodically movable toward and from the said bed; and structure for driving said bed comprising a driving pinion, a plate pivoted to the bed at one end of the former, an endless rack in mesh with said pinion at the other end of said plate, and means for maintaining the pinion and rack in mesh as the latter is driven by the former.

15. An intaglio printing machine comprising a bed to carry the stock being printed; means for reciprocating the said bed; an arcuate printing plate at one side of the bed; means to rotate the said plate; means for periodically inking the said plate; and apparatus for periodically moving the printing plate toward and from the bed as the plate is rotated and as the said bed is reciprocated, said apparatus adapted to so move the printing plate between periods of inking the said plate.

ROBERT W. BENDER.

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