Interleaf sheet for planographic printing plates, abutting member for planographic printing plates, and packaging structure for planographic printing plates
AssigneeFuji Photo Film Co., Ltd.
InventorTakayuki Usui
Life of this patent
Estimating the term…
Abstract
A protective cardboard for planographic printing plates has a cardboard main body, a moisture-proofing layer on both surfaces of the cardboard main body, and an adhering paper adhered onto the moisture-proofing layer. By the adhering paper contacting an interleaf sheet, a coefficient Y of static friction between the protective cardboard and the interleaf sheet is equal to or less than a coefficient X of static friction between the interleaf sheet and an image forming surface of the planographic printing paper (i.e., Y≦X).
Claims19
An interleaf sheet for planographic printing plates, comprising:
- a planographic printing plate contacting surface, which contacts an image forming surface of a planographic printing plate with an applied film formed thereon in a state in which the planographic printing plate is packaged;
- and
- an abutting member contacting surface, which contacts an abutting member for planographic printing plates, and which is disposed at a side that is opposite to a side of the planographic printing plate contacting surface,
- wherein surface properties of the planographic printing plate contacting surface and the abutting member contacting surface are respectively determined so that a coefficient of static friction between the abutting member and the abutting member contacting surface is no more than a coefficient of static friction between the planographic printing plate contacting surface and the image forming surface.
An abutting member for planographic printing plates which, in a state in which an interleaf sheet for planographic printing plates is in contact with an image forming surface of a planographic printing plate with an applied film thereon, protects the planographic printing plate by contacting the surface of the interleaf sheet for planographic printing plates opposite to the surface which contacts the image forming surface of the planographic printing plate, said abutting member for planographic printing plates comprising:
- an interleaf sheet contacting surface whose properties are determined such that a coefficient of static friction between the interleaf sheet for planographic printing plates and the abutting member for planographic printing plates is no more than a coefficient of static friction between the image forming surface of the planographic printing plate and the interleaf sheet for planographic printing plates.
A packaging structure for planographic printing plates, comprising:
- a planographic printing plate;
- an interleaf sheet contacting an image forming surface of the planographic printing plate with an applied film formed thereon;
- and
- a protecting member, which protects the planographic printing plate by contacting a surface of the interleaf sheet opposite to the surface of the interleaf sheet contacting the image forming surface of the planographic printing plate,
- wherein a coefficient of static friction between the protecting member and the interleaf sheet is no more than a coefficient of static friction between the planographic printing plate and the interleaf sheet.
Dependencies are inferred from the claim text.