US747738A - Process of producing celluloid printing-plates. - Google Patents

Process of producing celluloid printing-plates. Download PDF

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Publication number
US747738A
US747738A US14293503A US1903142935A US747738A US 747738 A US747738 A US 747738A US 14293503 A US14293503 A US 14293503A US 1903142935 A US1903142935 A US 1903142935A US 747738 A US747738 A US 747738A
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United States
Prior art keywords
celluloid
plate
printing
plates
matrix
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Expired - Lifetime
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US14293503A
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Bernhard Ludwig
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
    • B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts

Definitions

  • the object of this invention is to furnish a process of producing celluloid prin ting-plates by which the fine points of the half-tone plate are reproduced in the most accurate manner on the celluloid printing-plate, so that every detail of the original half-tone plate is reproduced in printing; and for this purpose the invention consists of a process of producing celluloid printing-plates by pressing the halftone plate into ale-ad plate, heating the latter and pressing a celluloid plate into the lead matrix so as to reproduce all the fineness and detail of the original half-tone plate on the celluloid printing-plate.
  • a o lgad plate of suitable thickness is placed on the h a l f tppe or other plate to be reproduced and then subjected to considerable pressure, so that all the fine points of the plate are transferred to the surface of the lead plate, forming thereby a matrix which corresponds in fineness and detail to the original half-tone plate.
  • On the lead matrix is then placed a celluloid plate and pressed into the. same while the lead matrix is heated from the opposite side, the temperature for heating being preferably about 125 centigade, as at this temperature the celluloid isin the best plastic condition'for producing the exact counterpart of the original plate pressed in the lead matrix.
  • the celluloid plate is then permitted to cool and harden and is then in condition for use after being mounted on a suitable backing of wood or metal in the usual manner. This process perm-its the use of celluloid plates of considerable hardness and of any thickness for printing purposes,

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Description

' UNITED STATES manta December 22, 1903 PATENT OFFICE,
BERNHARD uowie, OF. EW YORK, N. Y.
PROCESS OF PRODUCING CELLULOID PRINTING-PLATES.
vS1':EGIFIG1LJ.ION forming part of Letters Patent No. 747,738, dated December 22, 1903.
Application filed February 11, 1903. Serial No. 142,935. (No model.)
To aZZ whom it may concern:
Be it known that I, BERNHARD LUDWIG, a citizen of the United States, residing in New York, in the borough of Bronx and State of New York, have invented certain new and useful Improvements in Processes of Prod ucing Celluloid Printing-Plates, of which the following is a specification.
Attempts have been made heretofore for prod ucing celluloid printing-plates from halftone and other plates by forming a matrix of celluloid from said half-tone plate and then pressing aheated plate of celluloid into the cold matrix and printing from the celluloid plate thus obtained. In place of the celluloid matrix a hard-rubber matrix-was used, but neither process gave satisfactory results in practice for the reason that the first process failed to transfer the fine points from the matrix-plate to 'the celluloid printing-plate, while in the latter process the sensitiveness. of the hard-rubber matrix to the changes of temperature rendered the same not reliable enough for producing the printing-plates,
The object of this invention is to furnish a process of producing celluloid prin ting-plates by which the fine points of the half-tone plate are reproduced in the most accurate manner on the celluloid printing-plate, so that every detail of the original half-tone plate is reproduced in printing; and for this purpose the invention consists of a process of producing celluloid printing-plates by pressing the halftone plate into ale-ad plate, heating the latter and pressing a celluloid plate into the lead matrix so as to reproduce all the fineness and detail of the original half-tone plate on the celluloid printing-plate.
In carrying out my improved process a o lgad plate of suitable thickness is placed on the h a l f tppe or other plate to be reproduced and then subjected to considerable pressure, so that all the fine points of the plate are transferred to the surface of the lead plate, forming thereby a matrix which corresponds in fineness and detail to the original half-tone plate. On the lead matrix is then placed a celluloid plate and pressed into the. same while the lead matrix is heated from the opposite side, the temperature for heating being preferably about 125 centigade, as at this temperature the celluloid isin the best plastic condition'for producing the exact counterpart of the original plate pressed in the lead matrix. The celluloid plate is then permitted to cool and harden and is then in condition for use after being mounted on a suitable backing of wood or metal in the usual manner. This process perm-its the use of celluloid plates of considerable hardness and of any thickness for printing purposes,
which could not be done in the process heretofore in use, in which a soft celluloid printing-plate could only be employed, as a hard.
celluloid plate had'to be employed for the matrix-plate.
By my improved process all the fine lights of the originalhalf-toneplate are reproduced in the lead matrix and then transferred from the same in an exact and accurate manner to the celluloid plate. Any number of celluloid printing-plates can be produced from the lead matrix as required by the exigencies of the printer, and thereby printing-plates of excel lent quality obtained. 4
Having thus described my invention, I
claim as new and desire to secure by Letters I Patent 1. The herein-described process of producin pressing together a plate of celluloid and a lead matrix heated to the temperature of plasticity of said celluloid, and then removing said plate from said matrix, substantially as set forth.
4. The herein-described process of producing a celluloid printing-plate, which consists in pressing together a lead matrix heated to 125 centigrade and a plate of celluloid, and
then removing said celluloid plate from said 10 matrix, substantially as set forth.
In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.
BERNHARD LUDWIG.
Witnesses:
PAUL GOEPEL, HENRY J. SUHRBIER.
US14293503A 1903-02-11 1903-02-11 Process of producing celluloid printing-plates. Expired - Lifetime US747738A (en)

Priority Applications (1)

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US14293503A US747738A (en) 1903-02-11 1903-02-11 Process of producing celluloid printing-plates.

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US14293503A US747738A (en) 1903-02-11 1903-02-11 Process of producing celluloid printing-plates.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643417A (en) * 1949-07-02 1953-06-30 Neon Products Inc Method of forming embossed and decorated panels
US2699720A (en) * 1950-04-13 1955-01-18 Winfield S Brooks Half tone engraving process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643417A (en) * 1949-07-02 1953-06-30 Neon Products Inc Method of forming embossed and decorated panels
US2699720A (en) * 1950-04-13 1955-01-18 Winfield S Brooks Half tone engraving process

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