Device for automatically clamping and releasing recording material and operation of said device

US5369425A · kind A · utility

Assignee

• Linotype-Hell AG · DE

Inventors

• Ralf Balzeit · Preetz, DE
• Gunnar Behrens · Kiel, DE
• Gerhard Bloehdorn · Schwentinental, DE
• Bernd Lassen · Mönkeberg, DE
• Hans Penza · Preetz, DE
• Norbert Roth · Kiel, DE

Key dates

• Filing date: Feb 18, 1992
• Grant date: Nov 29, 1994
• Expiry date: Feb 18, 2012

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04N2201/04734
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

An apparatus and method for automatically clamping film material onto the recording drum of a reproduction device and for releasing the film material exposed by a recording element from the recording drum. The apparatus has a roll film cassette introducible into a light tight portion of the reproduction device. Conveyor and guide surfaces are provided between the roll film cassette and the recording drum. Film conveying means is provided for conveying the film web situated in the roll film cassette to the recording drum. A film cutting means is provided for the separation of film sheets. A film length measuring means, a pressure means having a lowerable pressure roller for the film sheets, a positioning drive for turning the recording drum into a start of clamping, start of exposure and start of release position, and a lift-off means having a lowerable lift-off finger for peeling the exposed film sheets from the recording drum are all provided. The film sheets are fixed on the recording drum by vacuum. Large-area film material from a roll film cassette can be clamped onto the recording drum with this apparatus without the formation of folds and without warping.