Printing – Planographic – Lithographic plate making – and processes of making or using...
Patent
1977-01-10
1979-12-25
Coughenour, Clyde I.
Printing
Planographic
Lithographic plate making, and processes of making or using...
331845, 101DIG12, 101211, 430 22, B41C 110, B41C 112, G03F 304
Patent
active
041799909
ABSTRACT:
A tool for effecting precision layout is provided with a translucent support surface and means for accurately positioning a straight edge in any of a number of preselected positions spanning the support surface. Apertures through opposite ends of the straight-edge element are selectively alignable with spaced rows of precision indexing holes which circumscribe the support surface. A pair of locator pins are removably disposed within said apertures projecting into selected indexing holes to accurately locate and retain the straight-edge element in a desired position across the support surface. A related registering method is provided which utilizes accurately positioned, perpendicularly intersecting lines to locate image transparencies upon a masking sheet as well as to register superimposed color impressions during printing.
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patent: 4003745 (1977-01-01), Blanks
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