US1745764A - Printing surface and process of producing the same - Google Patents

Printing surface and process of producing the same Download PDF

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Publication number
US1745764A
US1745764A US287880A US28788028A US1745764A US 1745764 A US1745764 A US 1745764A US 287880 A US287880 A US 287880A US 28788028 A US28788028 A US 28788028A US 1745764 A US1745764 A US 1745764A
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US
United States
Prior art keywords
sheet
printing surface
chalk
clay
producing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US287880A
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English (en)
Inventor
Lankes Eduard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1745764A publication Critical patent/US1745764A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M9/00—Processes wherein make-ready devices are used
    • B41M9/02—Relief make-readies

Definitions

  • the invention relates to a printing surface and improvements in the process of producing the same, by impressing a picture on the side of a sheet having its surface coated with f 5 chalk or prepared clay and washing or etch- 15 which reduces the labour and expense, and
  • My invention consists substantially of a relief printing surface formed by a sheet, coated on one side only with a chalk or clay preparation. The back of the sheet is protected from the action of the solvent or etching liquid by impregnation or by application of a protective coating.
  • a hardener such as formaldehyde, or
  • the chalk or clay is preferably applied in the form of thin successive layers.
  • This treatment of the back of the sheet tends also to prevent the curling of the sheet.
  • the inventionV is illustrated in the accompanying drawing which shows a transverse section of the improved plate.
  • a denotes a sheet of paper material or the like having one of its surfaces provided with a coating b of chalk or clay preparation and its opposite surface provided4 with a coating o resistant to any liquid capable of removing the substance of the coating b.
  • the etching of a plate such as that shown in the drawing is effected as follows: The entire plate is immersed in the etching fluid so that not only the chalk or clay coated side but also the rear side is subject to the action of the etching fluid. The chalk'or clay coated surface is etched by the fluid and, unless the rear side of the plate were protected, it also would be attacked by the fluid, making the paper brittle and interfering with proper registry.
  • the rear side of the plate is provided with the resistant coating c, and under these conditions when the plate as a whole is immersed in the etching fluid and repeatedly turned therein as is usually done, the chalk or clay treated surface is properly etched while the opposite surface which is protected by the resist c is unaffected by the etching fluid, so that destruction of the paper and rolling up of the plate are prevented, and no trouble with registration is encountered.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Color Printing (AREA)
US287880A 1927-04-11 1928-06-23 Printing surface and process of producing the same Expired - Lifetime US1745764A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE288550X 1927-04-11

Publications (1)

Publication Number Publication Date
US1745764A true US1745764A (en) 1930-02-04

Family

ID=6059617

Family Applications (1)

Application Number Title Priority Date Filing Date
US287880A Expired - Lifetime US1745764A (en) 1927-04-11 1928-06-23 Printing surface and process of producing the same

Country Status (4)

Country Link
US (1) US1745764A (en))
BE (1) BE350414A (en))
FR (1) FR652413A (en))
GB (1) GB288550A (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579182A (en) * 1948-12-06 1951-12-18 Alfred E Farley Method of making mechanical overlays

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2579182A (en) * 1948-12-06 1951-12-18 Alfred E Farley Method of making mechanical overlays

Also Published As

Publication number Publication date
GB288550A (en) 1928-11-01
FR652413A (fr) 1929-03-08
BE350414A (en))

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