Apparatus for the production of exposed printing plates

US4017183A · kind A · utility

Assignee

• BASF SE

Inventors

• Werner Lenz · Bad Dürkheim, DE
• Josef Woellhaf · Ludwigshafen, DE
• Klaus Spreng · Ingolstadt, DE
• Manfred Zuerger
• Paul Hecke · Ludwigshafen, DE
• Gerhard Hoffmann · Otterstadt, DE
• Milan Obradovic

Key dates

• Filing date: Feb 19, 1975
• Grant date: Apr 12, 1977
• Expiry date: Feb 19, 1995

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/767
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process and apparatus for the production of exposed printing plates consisting of a resin layer and a support, said resin layer being prepared from a fluid photopolymerizable material which is introduced into a mold having at least one transparent wall which is covered with an image-bearing transparency, and being exposed through said image-bearing transparency, which causes photopolymerization of the exposed areas of the resin layer and bonds these areas to the support which is provided with an adhesive layer. The improved process comprises introducing a predetermined amount of fluid photopolymerizable material, said amount corresponding substantially to the volume of the resin layer of the exposed printing plate; adjusting said support and said transparent wall of the mold so that they are equidistant from one another, adjustment being advantageously effected by bending or doming the support relative to the transparent wall after the latter has been bent or domed by the fluid material introduced into the mold under pressure. Further embodiments of the invention serve to minimize the loss of photopolymerizable material and to avoid the formation of foam when the fluid material i…