Lithographic printing plate
US4596189A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1984 |
| Grant date | Jun 24, 1986 |
| Priority date | — |
| Expiry date | Mar 1, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N1/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved lithographic printing plate which comprises (a) a substrate with (b) a substantially planar porous metal coating on at least one surface of the substrate and (c) a light-sensitive coating on the porous metal coating on the substrate. The substrate (a) can be made by a process for forming a substantially planar porous metal coating on a substrate which comprises thermal spraying of the metal on the substrate to form a porous metal coating on the substrate, rolling the sprayed coating to render it substantially planar and in the process close the pores, and the removing part of the surface to improve planarity and to reopen the surface-connected pores. The metal to be sprayed may be in the form of a wire, powder or molten metal mass and be selected from the group consisting of aluminum, zinc, tin, copper, nickel, or their alloys. Preferably, the substrate is selected from the gorup consisting of steel, aluminum, aluminized or galvanized steel, tin plate, and plastic. The spraying is preferably conducted in a non-oxidizing or reducing atmosphere. Preferably, the coating on the substrate is subjected to cold rolling. Most preferably, the rolling is conducted so as to reduce…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.