Ferromagnetic adhesive foil for printing applications
US5832831A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Aug 30, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB82Y15/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A ferromagnetic foil carrying a layer of a pressure sensitive adhesive for adhesive attachment to a printing plate to be used in a letterpress or flexographic printing operation. The ferromagnetic foil preferably is formed of a cold rolled steel having a thickness in the range of from about 0.001 inch to about 0.007 inch. The metal foil allows the printing plate to be adhered to the outer surface of a magnetized printing cylinder due to the magnetic attraction between the printing cylinder and the ferromagnetic foil. If the printing cylinder is not magnetized, but is formed of a ferromagnetic material, a flexible magnetic pad is applied to the outer surface of the cylinder, and the ferromagnetic foil-backed printing plate is then placed on the flexible magnetic pad. If the printing cylinder is formed of a non-ferromagnetic material, a flexible magnetic pad is first adhered to the outer surface of the cylinder, such as by an adhesive, and the foil-backed printing plate is then adhered to the flexible magnetic pad.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.