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US 4,033,695 AGranted
Process and apparatus for copying on printing plates
AssigneeHoechst Aktiengesellschaft
InventorsGeorge Sader, Dieter Osswald
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AssigneeHoechst Aktiengesellschaft
InventorsGeorge Sader, Dieter Osswald
Estimating the term…
A process and apparatus for exposing light-sensitive printing plates through an original to be copied, which includes forming a cassette-type, vacuum frame assembly by superimposing the printing plate and the original upon one another and disposing them in a cavity formed between an elastic blanket and a light-permeable plate, and evacuating the assembly, to improve contact between the printing plate and the original, at a position removed from a light means, thereafter temporarily placing the assembly in a position to be exposed to the light means and finally removing the assembly from the exposure position. A vacuum frame assembly is provided having a connect-disconnect means for temporary attachment both to the evacuation means removed from the light source and, if desired, to an evacuation means at the exposure position. Transport systems are also provided, including conveyor belts or transport chains for sequentially transporting a plurality of assemblies to and from the exposure position and from a feed magazine to a discharge magazine via the exposure position.
A process for exposing a light-sensitive printing plate through an original to be copied, comprising forming a plurality of copying assemblies by bringing, in each assembly, an elastic blanket, said printing plate, said original, and a light-permeable plate into direct contact with one another, in the sequence recited and with the light-sensitive side of said printing plate toward said original, evacuating each assembly to improve the contact between said printing plate and said original,
A process for exposing a light-sensitive printing plate through an original to be copied, comprising forming in a first location at least one copying assembly by bringing an elastic blanket, said printing plate, said original, and a light-permeable plate into direct contact with one another, in the sequence recited and with the light-sensitive side of said printing plate toward said original, evacuating said assembly to improve the contact between said printing plate and said original,
A process for exposing a light-sensitive printing plate through an original to be copied, comprising forming a plurality of copying assemblies by bringing, in each assembly, an elastic blanket, said printing plate, said original, and a light-permeable plate into direct contact with one another, in the sequence recited and with the light-sensitive side of said printing plate toward said original, evacuating each assembly to improve the contact between said printing plate and said original,
Apparatus for exposing light-sensitive printing plates through an original to be copied, comprising a light means for exposing said printing plate;
Dependencies are inferred from the claim text.