Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
  • B41C1/00—Forme preparation
  • B41C1/16—Formes with areas rendered ink-resistant by covering with an amalgam; Printing plates for amalgam printing
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12486—Laterally noncoextensive components [e.g., embedded, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/12—All metal or with adjacent metals
  • Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
  • Y10T428/12771—Transition metal-base component
  • Y10T428/12785—Group IIB metal-base component

Definitions

• This invention relates to a method for producing printing blocks and the like for any kind of duplicating, either by platen printing, rotary Printing or the like.
• the present invention is therefore based on the recognition of the fact, that it must be possible to apply the mercury in bound condition so that it securely adheres to the surface of the block so that the portions thus treated and not covered by the actual picture remain ink-repellent for printing a sufiiciently large edition, without the mercury being pulled off the block.
• the invention consists in suspending into a galvanic bath a mercury metal amalgam as anode and a sheet metal plate on which a picture has been copied as cathode so that during the electrolytic transition from anode'to cathode the amalgam deposits only on the portions of the cathode plate which are not covered by the picture.
• printing plate acts ink repellent on the portions which are not covered by the picture. This can be effected in a satisfactory manner by applying a finished amalgam of mercury and one of the suitable metals copper, tin, zinc onto the surface of the block, .which amalgam is obtained by cold method by grinding chips of 'the metal selected with mercury to form an amalgam.
• the amalgam of mercury and one of the metals copper, tin, zinc thus obtained can be applied to the surface of the block by mechanical means, for example, the amalgam produced by cold method is rolled onto the surface of the block, or the application can be carried out galvanically by suspending the amalgam of mercury and the metal selected as anode and the block as cathode in a galvanic bath. It is immaterial whether the amalgam obtained is applied onto the whole surface of the block or only onto the portions thereof which are not covered by the picture. In the latter instance the actual picture for printing must be previously applied onto the block by some known copying process. The portions not covered by the picture are preferably slightly corroded and the recessed portions thus produced are filled with the finished amalgam.
• Chips of suitable metal such as copper, tin,
• a suitable block is suspended as cathode and a plate, shaped corresponding to the block, obtained by grinding mercury with metal, for example copper dust is suspended as anode in a galvanic bath.
• the amalgam then deposits galvanically on the surface of the block, namely over the entire width thereof, if the picture has not been previously applied onto the block. However, if the picture has been previously applied on the block, the amalgam would deposit only on the portions of the block not covered by the picture.
• a size copy is applied in known manner.
• The. portions of the block which are not covered by the copy are deeply corroded in a mordant bath.
• the plate is then painted with chlorate of zinc and dipped in a bath containing zinc and mercury in liquid condition.
• the corrosionded portions which are not to print, are filled.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Electrolytic Production Of Metals (AREA)
• Printing Plates And Materials Therefor (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=32037174

Family Applications (1)

Country Status (3)

• 0
  • BE BE408171D patent/BE408171A/xx unknown
• 1933
  • 1933-06-23 DE DER88204D patent/DE608320C/de not_active Expired
  • 1933-11-14 US US698022A patent/US2143524A/en not_active Expired - Lifetime

Also Published As

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