US2106078A

US2106078A - Plate holder for intaglio printing machines

Info

Publication number: US2106078A
Application number: US85339A
Authority: US
Inventors: Robert W Bender
Original assignee: INTER COLLEGIATE PRESS
Current assignee: INTER COLLEGIATE PRESS; INTER-COLLEGIATE PRESS
Priority date: 1936-06-15
Filing date: 1936-06-15
Publication date: 1938-01-18
Anticipated expiration: 1955-01-18

Description

Jan. '18, 1938.

R. W. BENDER PLATE HOLDER FOR IN'I'AGLIO PRINTING MACHINES Filed June 15, 1936 INVENTOR, v oerf Z 76/707/T I ATTORNEYS.

' A yet further aim of the present invention is and coacting key-way 26 in cylinder 8 so that 20 said plate so that the same might be secured convex surface concentric to the axis of rota- 25 '30 arched plate. 34 and it is obvious that this fin might be in- 30 5 ing drawing will be fully described. In said in abutment with shoulders 32. The. other ends 35 Patented Jan. 18, 1938 2,106,078

UNITED STATES PATENT OFFICE PLATE HOLDER FOR INTAGLIO PRINTING MACHINES Robert W. Bender, Kansas .City, Mo., assignor to Inter-Collegiate Press, Kansas City, Mo., a corporation of Missouri Application June 15, 1936, Serial No. 85,339

6 Claims. (01. 101-478) This invention relates to intaglio printing ma- January 21, 1935, and this application is a conchines of the type wherein an arcuate printing tinuation in part of said application, which replate is employed, and the primary object is the lates to intaglio printing machines. provision of an unique holder for the plate which The rotatable cylinder 8 upon which is mount- 5 has as a part thereof, means for removably seed one or more of the specially formed printing curing. the. plate in place, positive guide means plates, is a part of the printing machine, and the for the plate, and structure whereby the entire plate holder embodying the invention is mounted arrangement, including the plate, might be upon said cylinder 8 for longitudinal movement mounted upon a rotatable cylinder for adjusttherealong. The plate holder per se comprises 10 ment longitudinally thereof. a two-part collar, one of which parts I0 is 10 A still further object of the invention is to provided with radially extending ears l2, through provide a specially formed printing plate for which is formed openings 14 for the reception of intaglio printing machines, which plate is formed bolts or similar securing means IS. The other with an offset portion adjacent one end thereof part N3 of the split collar has coacting, radially 15 for the purpose of engaging a coacting element extending portions provided with tapped open- 15 on the aforesaid plate holder and to the end that ings in axial alignment with openings 14 so the printing surface may be positively freed of that said bolts 16 might be drawn tight when the excess ink or the like during work so that the collar is secured in the desired position on cylinplate will not produce unsatisfactory results. der 8. A key 22 rests in key-way 2:5 in part 18 the provision of a novel method of forming a movement of the two-part collar about cylinder 8 plate for intaglio printing machines, which is precluded.

method includes the steps of engraving. one side Part l8 has a radially extending fin 28, the of a flat planar plate and, thereafter, arching outer face of which is arcuate and presents a upon .a concavev surface and the work produced tion of cylinder 8. Fin 28 has as a part thereof, a therefrom without experiencing the effects of shoulder 32, against which rests the end of printdistorted engraving which might occur if the ing plate 34. In the instance illustrated, fin 28 engraving were produced upon an initially is extensive enough to accommodate two plates With the foregoing general objects in view with cre sed n size s as o pp rt at least one respect to the plate, holder therefor, and the other plate. Shoulders 32 extend inwardly bemethod of producing said plate, the embodiment 10W face 30, and plates 34 are arranged o face of the invention exemplified in the. accompany- 30 in end-to-end relation, with the ends thereof drawing: of plates 34 extend over a recess 36 provided in Figure 1 is a side elevation of a plate holder fin 28, and after the plates have been mounted, for intaglio printing machines embodying the the said other ends might be bent slightly ininvention and in operative position on the cylinwardly, as shown in Fig. l.

der of the machine. Eachof plates 34 has an offset 38 created 40 Fig. 2 is a top plan view of th ame, thereon adjacent one end, and in practice, it Fig. 3 is an elevation of the other side of the is this end of plate 34 that is considered to be plate holder shown in Fig. 1. the guide end. This offset portion 38 curves Fig. 4 is a cross sectional view through the inwa dly out of h n l pl n f h jor plate holder, with cylinder in elevation, taken on portion of plate 34 so that shoulder 32 might be 45 line IV--IV of Fig. 1. engaged, and further so that any irregularities Fig. 5 is an edge elevation of the formed plate at the end of plate 34 W not be effective in per se, and, catching and transferring ink to the stock. Fig. 6 is a cross sectional view through the Turning the opposite end of plate. 34 inwardly as plate holder alone. indicated in Fig. 1 so that it drop-s slightly into 50 The plate and plate holder forming the subrecess 36 likewise is an advantage, especially ject matter of this particular invention is since the printing surface 40 of the plate must especially adaptable for use in engraving mabe wiped clean before the plate may be used effichines such as shown and described in my 00- ciently. This guide end of plate 34 is used when pending application Serial Number 2,700, filed following the method of producing an engraved 55 printing plate, and because of such employment, little difficulty is encountered when setting the printing machine in operation.

Each plate 34 is secured in place on fin 28 by

opposed clamps

42 and 44, the former being retained in place by bolts 46 that extend through clamp 42 and into tapped openings 48 drilled into fin 28. Clamp 44 is specially made and a single adjusting bolt 50 secures the same in place. Bolt 50 is in threaded engagement with a tapped hole 52 provided in fin 28 and in order that clamp 44 might move away from the edge of plate 34 when bolt 58 is loosened, a spring 54 is employed and combined with the parts as illustrated in Fig. 4. Spring 54 is seated in a socket 56 and bears against the inner face of clamp 44 at a point adjacent to bolt 50. A laterally extending flange 58 is integral with clamp 44 along the inner face thereof and at one of its arcuate edges, and an inturned, sharpened flange Bil is formed on the same surface of clamp 44 along the other arcuate edge thereof. Bolt 50 is between flanges 58 and 80 and when the bolt is tightened, spring 54 is compressed and sharpened flange G is drawn tightly into engagement with the longitudinal edge of plate 34. The inner face of flange 58 serves as a fulcrum point and the remaining portion of clamp 44 is spaced from the adjoining face of fin 28. Under normal conditions, clamp 42 need not be moved when a printing plate is adjusted or replaced.

Any number of plate holders of the nature just detailed might be mounted upon cylinder 8 and, obviously, each will be independently movable longitudinally along cylinder 8 so that the space between the several holders employed may be increased or decreased, as desired. A plate holder of the character specified presents means whereby a large number of calling cards, as an example, may be printed at the same time and on large sheets of stock in gang arrangement.

Plate 34 should be formed in a particular manner and the engraving 62 of one face of plate 34 should be done before plate 34 is arched. Heretofore engraving of arched plates to produce intaglio printing has presented its difiiculties because of the failure of the engraver to bring into consideration the curvature of the plate. When producing an engraved plate for use in my intaglio printing machine, the same should be engraved while it is flat and subsequently arched and provided with an offset portion 38 through novel means forming the subject matter of my application filed on even date herewith. When engraving 62 is done, the end of plate 34 which is later offset with portion 38 should form the end from which to gauge or place the line passing through the center of engraving 62. When that center line is established and engraving 62 imprinted on plate 34 so that it balances with respect to said line, the placement of plate 34 in the holder with that offset end in engagement with shoulder 82 will always present tothe operator something like an accurate first impression.

Where several holders are mounted upon cylinder 8, key 22 maintains them all in alignment, and since each holder is alike, and further since offset portions 38 and shoulders 32 are always brought together, the aforesaid center line of engraving 52 on every plate 34 should normally be upon a common straight line extending across the large sheet of stock being printed.

Advantages set forth in the foregoing specification will be obtained when using a plate holder and plate constructed in accordance with this invention, and while one preferred embodiment has been illustrated and described, it is obvious that changes might be made without departing from the spirit of the invention or scope of the appended claims.

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

, 1. In an intaglio printing machine, a cylinder; a pairof arched plates each having a printing surface thereon; a fin mounting the plates in spaced-apart, end-to-end relation on the cylinder in spaced relation thereto; clamps on the said fin for each plate respectively for removably securing the same in operative position; and guide elements on the fin for said plates, said guide elements engaging the remote ends of said plates, said clamps engaging the plates along the arcuate longitudinal edges thereof.

2. In an intaglio printing machine, a cylinder; a pair of plates each having a printing surface thereon; a fin mounting the plates in spacedapart, end-to-end relation on the cylinder in spaced relation thereto; clamps on the said fin for each plate respectively for removably securing the same in operative position and guide shoulders formed on the fin for said plates extending below the normal plate-supporting surface thereof, said plates each having an arcuate offset portion at one end thereof for extending below the said normal surface to permit the ends at said offset portions to engage said shoulders.

3. In an intaglio printing machine, a cylinder; an arcuate plate, having a printing surface thereon; and means for mounting the plate on the cylinder in spaced relation thereto comprising a twopart collar, a radially extending fin integral with one part of the collar having an arcuate platesupporting surface, and clamping jaws on each side of the said fin for engaging the longitudinal edges of said plate.

4. In an intaglio printing machine, a cylinder; an arcuate plate, having a printing surface thereon; and means for mounting the plate on the cylinder in spaced relation thereto comprising a two-part collar, a. radially extending fin integral with one part of the collar having an arcuate plate-supporting surface, and clamping jaws on each side of the said fin for engaging the longitudinal edges of said plate, said fin having a guide element formed thereon for engaging one end of the printing plate.

5. 'In an intaglio printing machine, a cylinder; an arcuate plate, having a printing surface thereon; and. means for mounting the plate on the cylinder in spaced relation thereto comprising a twopart collar, a radially extending fin integral with one part of the collar having an arcuate platesupporting surface, and clamping jaws on each side of the asid fin for engaging the longitudinal edges of said plate, said fin having a guide element thereon for engaging one end of the printing plate and a recess provided therein for receiving a portion of the printing plate at the other end thereof.

6. In an intaglio printing machine, a cylinder; an arcuate plate having a printing surface thereon; and means for mounting the plate on the cylinder in spaced relation thereto, comprising a collar fitted onto the cylinder, a radially extending, relatively narrow segmental fin integral with the collar having a pair of fiat sides in planes at right angles to the axis of the cylinder, and clamping jaws on the said flat sides for engaging the arched longitudinal edges of said plate.

ROBERT W.- BENDER.