# US 5,430,521 A · Device for the development of photographic silver halide material

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- Number: US 5,430,521 A
- Document ID: US5430521A
- Status: Granted
- Kind: A
- Application number: 08/130,988
- Filed: 1993-10-04
- Granted: 1995-07-04
- Earliest claimed: 1992-10-14
- Assignees: Agfa NV
- Inventors: Ubbo Wernicke
- Web page: https://patentgrep.com/patent/US5430521A

## CPC

- G03D 3/132: {fed by roller assembly}
- G03D: APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS (apparatus specially adapted for photomechanical production of textured or patterned surfaces G03F); ACCESSORIES THEREFOR (photosensitive materials or processes for photographic purposes G03C; electrographic, electrophotographic, or magnetographic methods or apparatus G03G)

## Abstract

A device for processing a photographic silver halide material, comprising a tank which is filled with a photographic processing bath, through which the photographic material is continuously conducted at a specified conveyance speed, and in which, below the level of the bath, is arranged at least one driven roller which can rotate at a peripheral speed which differs from the conveyance speed of the photographic material and the surface of which is in contact with the photographic material on the emulsion side, facilitates a reduction in the processing time or, in the case of an unchanged processing time, improved processing reliability.

## Claims

### Claim 1

A process for processing a photographic silver halide material wherein the silver halide material is continuously conducted, at a specified conveyance speed, through at least one tank filled with a photographic processing bath, characterized in that the emulsion side of the photographic material is brought into contact with the surface of at least one driven roller arranged in the tank below the level of the bath, where the roller has a peripheral speed which differs from the conveyance speed of the material, possesses a soft surface and rotates in the opposite direction to the direction of conveyance of the photographic material.

### Claim 2 (depends on 1)

A process as claimed in claim 1, characterised in that at least two rollers are provided which rotate in mutually opposed directions at a peripheral speed which differs from the conveyance speed of the material.