Apparatus for exposing and developing photosensitive material

US4297027A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Otto Stemme · Munich, DE
• Berthold Fergg
• Viktor Osegowitsch
• Wolfgang Viehrig · Munich, DE

Key dates

• Filing date: Nov 27, 1979
• Grant date: Oct 27, 1981
• Expiry date: Nov 27, 1999

Classification

• Technology area (CPC G): Physics
• CPC primary: G03D9/00
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A combined exposing and developing apparatus for film units wherein a negative sheet overlaps and extends beyond a positive sheet has an exposing unit in which the uppermost film unit of a stack of such units in a cassette is exposed to light. The developing unit has a casing which is adjacent to a compartment for cassettes and has two advancing rolls which pinch the leader of the negative sheet of a freshly exposed film unit in response to manual pivoting of a carriage for the advancing rolls by way of a rotary knob. The leader of the negative sheet is automatically separated from the positive sheet by a separating device in response to rotation of the knob before the two sheets advance through separate channels which are filled with a developing liquid. The sheets are thereupon reunited and moved into the nip of two squeezing rolls which are driven by the knob and wipe off the surplus of developing liquid before the reassembled film unit enters a diffusion chamber below the compartment for cassettes. Such film unit is removed from the diffusion chamber after a certain period of dwell therein, and the operator thereupon separates the positive and negative sheets of the fully devel…