Thermal transfer donor and receptor for lithographic printing applications
US5494774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1995 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Apr 10, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C1/1091
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermal transfer system for transferring material in an imagewise manner by means of thermal transfer printing from a donor element to an image receiving element is used to prepare printing plates. In one construction, a donor element, which is prepared by coating a photoinitiator (and optionally a sensitizer) in a binder on a backing material, is used with an image receiving element, which is prepared by coating a photopolymer (and optionally a sensitizer) on a substrate having a microporous hydrophilic crosslinked silicated surface. In an alternative construction, a donor element, which is prepared by coating a sensitizer in a binder on a backing material, is used with an image receiving element, which is prepared by coating a photopolymer and photoinitiator on a substrate having a microporous hydrophilic crosslinked silicated surface. In yet another construction, a donor element, prepared by coating a thermal transfer layer containing a photopolymer, a photoinitiator and/or a sensitizer on a backing material, is used with an image receiving element having a microporous hydrophilic crosslinked silicated surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.