US2111914A

US2111914A - Registering device for use in making printing plates

Info

Publication number: US2111914A
Application number: US19661A
Authority: US
Inventors: Charles E Kohlberger
Original assignee: HEARST ENTPR Inc
Current assignee: HEARST ENTERPRISES Inc; HEARST ENTPR Inc
Priority date: 1935-05-03
Filing date: 1935-05-03
Publication date: 1938-03-22
Anticipated expiration: 1955-03-22

Description

March 22, 1938. 2,111,914-

REGISTERING DEVICE FOR USE IN MAKING PRINTING PLATES C. E. KOHLBERGER 5 Sheets-Sheet 1 a A INVENTOR 722 v ATTORNEYS Filed May 3, 1955 March 22, 1938 c EK HLBERGER 2,111,914

REGISTERING DEVICE FOR USE IN MAKING PRINTING PLATES Filed May- 5, 1935 3 Sheets-Sheet 2 IN V EN TOR.

MAJ!

ATTORNEYS.

Mar h 22, 1938. -c, E. KOHLBE GER 2 111,914

Patented Mar. 22, 1938 I p I UNITED STATES PATENT o FlcF.

Racism-mine DEVICE FOR USE IN MAK- mo. rnnv'rme PLATES Charles E. Kohlllerger, Garden City, N. Y., as-

signor to Hearst Enterprises. Incorporated, New York, N. Y., a corporation ot New York Application May a, 1935. serial n 19,661 2 Claims. (01. 101-4014) My invention relates to a new and improved Fig. fiillustrateshow aplurality of metal plates, registering device for use in making printing which illustrate different subjects and which may plates, and to a new and improved method for have been made at different places, canbe located securingproper registration, in the preparation in proper registration.

'5 of printing plates. Fig. 7 is a sectional view on the line 1--1 of 5 One of the objects of my invention is to pro- Fig. 6- vide a universal device which can be rapidly and F 8 s a p p View Of a mat w c has accurately used in the preparation of stereotype been prepared by t e use Of the pp tus llusprinting plates and electrotype printing plates, trated in Fig. 10. w for use in printing newspapers, books and the like. Fig. 9 is a sectional view on the line 99 of 10 Another object of my invention is to provide a Fig. 8. device and a methodwhereby the preparation of g- 10 s a sectional V w illustrating ow a proofs will be facilitated. mat is prepared with the use of a pan which has Another object of my invention is to provide a been modified according to y i ve method and a device whereby proof-plates which HeIetOfOIe, d n p p g printing plates,

illustrate difierent subjects can be properly 'asand o particularly stereotype p -p sembled in proper'registration, in order to make it has n common pr c t 'm k a p a single metal stereotype plate or/the like which rap ativ f th matt r t be r p du d, shall correspond to said proof-plates. Said metal and id at was ma on t-p a l 2 plate may be a stereotype plate or an electrotype material- Seid negative s placed 119 a sheet- 20 plate,.or a gravure or rotogravure plate. of ri d and tr nsp rent plate l s Light Wa Another object of my invention is to provide passed t g seidhegetive and h oug the printing plates for multi-color printin whereby glass. and e t a s te light was allowed 9 the various plates can be broughfl in) exact fall upon the light-sensitive surface of 8. metal registration for each color, and in every set. plate- The metal plate was then developed and 25 Other objects of my invention will be set forth c us p oducin a proo -p a e, upon a flat in the following description and drawings which sheet of metal. v illustrate preferred embodiments thereof, it being TWO more Of these r f-pl es Were then understood that the above statements of the used for making a Proof upon single sheet of objects of my inyention are intended to generally Celluloid 01' other light-permeable material. and 30 explain the same t t limiting it in any in performing this operation, it was necessary to" manner U adjust the two metal proof plates, so thattheir 1 top plan w f a plate which is proofs upon the single sheet of Celluloid were in made of transparent gla'ss, or other suitabl'e transpropel registration one of the metal p parent; and preferably rigid material, m plate 7 plates was then riveted or otherwise connected to 5 having certain black markings formed thereon. a relatively large metal base plate- The other Fig 2- a sectional View on the line 2 of proof-plate or proof-plates were then placed on v Fig. 1. l top of-the metal base plate.

- Fig. 3 is a top plan view of the plate shown in The proof of the Celluloid was placed above 40 Fig. lfafter said plate has been assembled with these metal P -P tes, and the loose metal 40 one- 01 more photographic negatives, am 'neg a' proof-plates were then adjusteduntil they were tives having been made on light-permeable man W registration with the'fixed metal baseterial such as celluloid or the like. T et D p es were then Fig. 4 shows a. metal plate which has been v d 0 0therwise connected tothe large metal made with the use of the device illustrated in ba t After h us oof-plates had Fig. 3.' Said metal plate is illustrated as being. u e n pr p rly assembled and riveted to :3. located upon the bed-plate of a proof-press. l g metal s -Pl te, the metal base-pla e was i Fig 5 illustrate th lat h w i Fig, 4, placed'in a'pan anda mat was made in the usual after said plate has been trimmed. Said trimmed manner m the metal P -p atesplate is illustrated as'beln located in the pan A l these ti n quired considerable 50 which is used for making a; negative impression t e and great accuracy and this was p cularof said plate, in a mat madeof flong or the like. ly disadvantageous for newspaper work. a Since the plate shown in Fig.5 is a negative, the As' shown in Fig. 1, I provide a sheet of rigid ,negative impression madefrom said plate is aplate glass l, which is transparent. This sheet positive. I has lines 2 and

markings

3 and 3a etched 55 therein, and these etched lines and markings are then filled with opaque material, such as a suitable black composition or the like. The lines 2 are arranged so as-to define panels A and B, which correspond to the respective plates which art to be made.

In Fig. 1 I have illustrated two such panels, but the sheet of glass could have any desired number of such panels.

Photographic negatives of the subjects to be reproduced are now prepared and located in the panels A and B. This is illustrated in Fig. 3, which conventionally illustrates one subject by the reference numeral 4, and another subject by the reference letter C. The negatives 4 and C are prepared upon Celluloid or other light-permeable material. If desired the panel A could contain negatives corresponding to two or more subjects, and this could also be done with the panel B.

The photographic negatives 4 and 'C are squeegeed into position so that they remain planar and they adhere firmly to the top of the plate glass I. The device shown in Fig. 3 is now placed on top of a sheet of metal, having a lightsensitive surface of the well known type. This light-sensitive surface is exposed by means of transmitted light which is sent through the assembly illustrated in Fig. 3.

The exposed metal plate is then developed and etched in the usual manner.

As shown in 4, this results in a metal plate In, having raised portions at 4 and at C and having depressed lines 2a, and also having recessed or depressed markings 3b and 3c. The depressed lines 2a in the metal plate In correspond to the opaque lines 2 of Fig. 1, and the depressed markings 3b and 3c of the metal plate l0 correspond to the

opaque markings

3 and 3a which are shown in Fig. 1.

As shown in Fig. 4, the metal plate It) is located upon'the bed plate ll of a proof-press. For this purpose holes may be formed in the metal plate III at the points I2 and i 4, which correspond to some of the markings 3a which are illustrated in Fig. 1. Said holes may-be formed at any number of desired points of the metal plate Ill, which correspond to the points 3a of Fig. 1.

The bed plate II is provided with upstanding pins P which enter the openings formed at said points l2 and H. The number and the position of the registering holes which are formed in the metal plate l0, depend upon the number and position of the pins P in the bed plate I I. These pins P can be integral with the bed plate II, or they may removably enter suitable sockets in the bed plate II.

The proof press which has the bed plate H,

can be used formaking a paper proof ,of the subjects in order to determine whether the metal plate It! has been prepared properly.

After a proof has been pulled, the metal plate fl! is trimmed, as illustrated in Fig. 5, and said metal plate I 0 is then placed within the us al pan l5. Said pan I5 is provided with pins a, whichenter the perforations which have been formed at the points l2 and I4 of the metal plate It. The pan l5 may have any desired number of said pins Pa, corresponding to some oi to all face of said metal plate III in the usual manner. This sheet of fiong is then subjected to pressure by the ram R of the usual hydraulic press, so that a single mat can be made which corresponds to a plurality of subjects.

As previously stated, this fiong can correspond to two or more different subjects.

The lower part of Fig. 6 illustrates the lower portion of the plate which is shown in Fig. 5. That is, Fig. 6 illustrates the assembly of metal proof-plates, which may have been made at different times and in different localities.

It may be assumed that the plate which corresponds to the subject L which is shown in the upper part ofFig. 6 has been made at a place which is different from the place of manufacture of the plate which corresponds to the subject C in Fig. 6. The plate corresponding to subject L has the same dimensions as the plate corresponding to subject C, and the plate corresponding to subject L has been made by the method previously specified. These plates are indicated by the reference letters Illa. and lb;

The separate plates illustrated in Fig. 6 are provided with perforations at the points I2 and I4, and by means of these perforations and the pins Pa which have been previously mentioned,

the plates illustrated in Fig. 6 can be automatically and accurately assembled in a pan.

Fig. 8 illustrates a single mat which has been made with the use of the two plates illustrated in Fig. 6. The mat which is illustrated in Fig. 8 can be used in the ordinary stereotype casting machine, in order to preparea stereotype plate which corresponds to the subjects C and L, which are illustrated in Fig. 6.

The invention is particularly useful in multicolor printing, since the series of plates which are required for multi-color printing can be registered with great accuracy, in making the necessary mat.

I do not wish to be limited to the use of paneldefining and guide depressions in the metal plate, as I can use panel-defining or guide means of any suitable type. Said panel-defining or guide means may be in relief or they may consist of surface markings.

I have shown the use of negatives for photographically printing upon the light-sensitive surface of a metal plate and simultaneously photographically printing guide indicia upon said light-sensitive-surface. If however, the photographic printing of a positive is desirable for any purp0se,I wish to include the use of a positive, as well as the use of a negative.

, Whenever I refer to a transparent member I, I wish to include the use of any suitable lightpermeable material, as absolute transparency may not be necessary under certain circumstances.

It is not necessary in all cases, that the panels A and B should have the same dimensions and the same area, although this is preferable.

I have shown preferred embodiments of my invention, but it is clear that numerous changes and omissions can be made without departing from its spirit.

I claim:

1. A method of making a stereotype plate which consists in mounting a plurality of lightpermeable negatives on a rigid transparent support having opaque markings which define sep.-- arated areas of said support, said negatives being mounted in said areas and fitting substantially in said areas, said support also having additional 76 printing the assembled negatives and the opaque markings of said support by transmitted light on the sensitized surface 01 a metal plate, developing and etching said metal plate, trimming the metal plate at its edges along lines which are substantially parallel to the edges of said areas and which are defined by the representations of said markings on the metal plate, forming perforations in said metal plate corresponding to at least some of the photographs of said markings on the metal plate and spaced from the representations of said negatives on said metal plate, said perforations being formed substantially at the edges of said areas, locating said perforated metal plate in a pan which has pins fixed thereto and which have pins which enter said openings, and pressing a duplicate of the etched surface of said metal plate in flong, and using the fiong to cast a stereotype plate.

2. In the art of making a stereotype plate which correspondsto a plurality of subjects, those steps which consist in'mounting light-permeable negatives of said subject on transparent rigid mounts which have opaque markings which define respective areas on said mounts, the negatives being respectively located in said areas and fitting substantially therein, the respective areas on said mounts being identical, each said mount also having additional markings which are spaced from the edges of said areas and which are located identically relative to the edges of the respective areas, photographically printing the assembled negatives and their respective mounts on the surfaces of sensitized metal plates, de-

veloping and etching said metal plates, trimming said metal plates along lines which are defined by the representations of said markings on said metal plates, said lines being spaced from the edges of the respective areas, perforating said metal plates at points corresponding to some of said additional markings, assembling said perforated metal plates in a pan which has pins fixed thereto and which enter the openings of the respective plates, and pressing a duplicate of .the etched surfaces of said assembled metal plates in fiong, and using the fiong to cast a stereotype plate.

CHARLES E. KOHLBERGER.