US33172A - Improvement in photolithographic transfers - Google Patents

Improvement in photolithographic transfers Download PDF

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Publication number
US33172A
US33172A US33172DA US33172A US 33172 A US33172 A US 33172A US 33172D A US33172D A US 33172DA US 33172 A US33172 A US 33172A
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Prior art keywords
photolithographic
transfers
improvement
ink
osborne
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03FPHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/26Processing photosensitive materials; Apparatus therefor
    • G03F7/30Imagewise removal using liquid means
    • G03F7/32Liquid compositions therefor, e.g. developers
    • G03F7/322Aqueous alkaline compositions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00Forme preparation
    • B41C1/10Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1008Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials

Definitions

  • the nature of my invention consists in applying retransfer-ink to the dry surface of the photographic print.
  • the greasy ink should be found to be of such a thickness as to disclose the positive print dimly through it.
  • 'In Poitevins process the method of inking differs from mine. He inks the exposed surface in a moistened state. I, on the contrary, ink it while dry. v and wets his transfer and applies the ink while it is wet.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Macromonomer-Based Addition Polymer (AREA)

Description

' NITED STATES PATENT OFFIGE.
JNO. W; OSBORNE, OF MELBOURNE, AUSTRALIA, ASSIGNOR TO SAML. T. HOOPER, OF BOSTON, MASSACHUSETTS.
IMPROVEMENT IN PHOTOLITHOGRAPHIC TRANSFERS.
Specification forming part of Letters Patent No. 33,172, dated August 27, 1861.
To all whom it may concern:
Be it known thatI, JOHN WALTER OSBORNE, of the city of Melbourne, in the county of Bourke, in the Colony of Victoria, in the dominions of Her BritannicMajesty, have invented a new and Improved Mode of Preparing Photolithographic Transfers; and I do hereby declare that the following is a full and exact description thereof.
The nature of my invention consists in applying retransfer-ink to the dry surface of the photographic print.
To enable others skilled in the art of photolithography to make use of my invention, I a
will proceed to describe how the process may be performed.
A sheet of photolithographic transfer-paper having been prepared with the positive photographic print of the design which it is proposed to transfer to the surface of a lithographic stone, or zinc plate, or other surface suitable for printing from, this photographic positive print is next to be inked in by passing it in its dry state through the lithographic press with its face toward a lithographic stone or plate, said stone or plate having been first evenlyrolledinwith lithographic retransfer-ink or an equivalent greasy or resinous substance. When the paper is pulled off the stone the greasy ink should be found to be of such a thickness as to disclose the positive print dimly through it. 'In Poitevins process the method of inking differs from mine. He inks the exposed surface in a moistened state. I, on the contrary, ink it while dry. v and wets his transfer and applies the ink while it is wet.
From the foregoing references it will be seen that I do not claim to be the original inventor of photolithography.
What I claim as my invention, and desire to secure by Letters Patent, is
The method hereinbefore described of inkin g with a greasy ink the whole surface of the sensitive transfer-paper, after exposure of the same to light under a negative, before Wetting or moistening it, and subsequently removing the superfluous portions of the ink in the manner detailed in Letters Patent of the United States issued to Samuel Thompson Hooper, assignee of John Walter Osborne, on the 25th day of June, 1861, for improvements in photolithography.
J. W. OSBORNE.
In presence of-- W. F. ROWE, O. V. Ross.
Asser also washes I
US33172D Improvement in photolithographic transfers Expired - Lifetime US33172A (en)

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US33172A true US33172A (en) 1861-08-27

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