Sheet material for mounting printing plates
AssigneeNorwood Industries Inc.
InventorGeorge F. Feeley
Life of this patent
Estimating the term…
Abstract
A sheet material for mounting flexible printing plates to the drum of a printing press includes a base film, a flexible foam uniformly coated on the base film, and a pressure sensitive adhesive coated on both the base film and the foam. The cohesion of the base film and the foam, the adhesion of the base film to the foam, and the adhesion of the adhesive to the base film and the foam is greater than the adhesion of the adhesive to the flexible printing plate and to the drum of a printing press. When the sheet material is removed from the printing plate and the drum, the foam, the base film, and the adhesive remain an integral sheet. A method for preparing and using the sheet material is also disclosed.
Claims13
A sheet material for mounting flexible printing plates to the drum of a printing press comprising:
- a base film having a gauge of 1 to 5 mils;
- a flexible foam at a thickness of 10 to 20 mils uniformly coated on and adhered to said base film, said foam having at least 40 percent resilience according to ASTM D 2632-74;
- a pressure sensitive adhesive coated on said base film and said foam;
- and
- the cohesion of said base film and said foam, the adhesion of said base film to said foam, and the adhesion of said adhesive to the base film and said foam being greater than the adhesion of the adhesive to the flexible printing plate and the drum of a printing press;
- whereby when the sheet material is removed from the printing plate and the drum, the foam, the base film and the adhesive remain an integral sheet.
Dependencies are inferred from the claim text.