Method of preventing bending of lithographic printing plates
US4942421A · kind A · utility
5Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jul 19, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/3042
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Processing of lithographic printing plates, particularly a method of preventing bending of the plates during processing. Conventionally, the chemical processing of lithographic printing plates includes advancing the plates between pairs of rotating brushes. The trailing edge of such plates is bent upwardly or downwardly after passing through the pairs of brushes. The present method places the pairs of brushes at an oblique angle with respect to the axis of advancing such that the leading and trailing edges of the lithographic plate laterally incrementally contact the brushes. As a result, bending is eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.