Agfa-Gevaert Ag

Josef Glass

Viktor Osegowitsch

Avelino Fernandez

Wilfried Hehn

Wolfgang Viehrig

Erwin Laar

Thomas Hammer

Friedrich Ganser

Wolfgang Kwiatkowski

Hans Dieter Frick

Karl Heinz Ritter

Photographic material to be processed passes generally horizontally through a succession of processing chambers including a developing chamber. The latter includes a developing-fluid tank containing a body of developing fluid, the body of developing fluid having an upper surface. At least one rotatably mounted submerging roller causes transported photographic material to pass below the upper surface of the body of developing fluid. A counterpressure roller presses the transported photographic material against the submerging roller during transport of the photographic material through the developing chamber. Flow elements are arranged to damp the agitation of the body of developing fluid resulting from rotation of the submerging and counterpressure rollers. The submerging and counterpressure rollers are so arranged that the trailing end of transported photographic material does not drag over the peripheral surface of either roller in circumferential-surface contact therewith.

Developing apparatus

Photographic material to be processed passes generally horizontally through a succession of processing chambers including a developing chamber. The latter includes a developing-fluid tank containing a body of developing fluid, the body of developing fluid having an upper surface. At least one rotatably mounted submerging roller causes transported photographic material to pass below the upper surface of the body of developing fluid. A counter-pressure roller presses the transported photographic material against the submerging roller during transport of the photographic material through the developing chamber. Flow elements are arranged to damp the agitation of the body of developing fluid resulting from rotation of the submerging and counterpressure rollers. The submerging and counterpressure rollers are so arranged that the trailing end of transported photographic material does not drag over the pheripheral surface of either roller in circumferential-surface contact therewith.

The developing apparatus includes a plurality of successive processing chambers arranged for generally horizontal travel of a photographic material to be developed through the successive processing chambers. Each processing chamber is provided with a processing-fluid tank and guide structure for guiding the photographic material through the processing chamber. Transport roller pairs are arranged intermediate adjoining processing chambers for transporting photographic material from one chamber to the next. The last processing chamber is a washing chamber. The washing chamber includes a wash-water tank containing a body of wash water, with the upper surface of the body of wash water being maintained at a predetermined level. The washing chamber includes a guide structure for guiding photographic material through the washing chamber, including a submerging structure for causing transported photographic material to pass below the upper surface of the body of wash water. A pair of outfeed rollers, constituting transport rollers and/or squeeze-off rollers, is provided at the outlet end of the washing chamber for outfeed of washed photographic material. One roller is located above the other. A spray pipe is located intermediate the submerging structure and the outfeed rollers and is provided with a plurality of spray outlets oriented for spraying the wash water onto the peripheral surface of the upper one of the outfeed rollers.

Washing chamber for photographic developing apparatus

A reel for photographic paper has a hollow cylindrical core and two disk-shaped flanges having centrally located extensions received in the respective end portions of the core. The inner side of each flange tapers outwardly in a direction from the periphery of the core toward the periphery of the respective flange. The extensions have ribs which penetrate into the inner surface of the core, and the core is further coupled to each flange by a rubber hose which surrounds the respective extension and is biased against the inner surface of the core by an endless helical spring which surrounds a conical end face of the corresponding extension.

Growing community of inventors

Ottobrunn, Germany

Josef Glass