摘要:
It is known to process photographic materials in sheet form in deep, narrow processing tanks. In these tanks, the material needs to be supported so that it can be removed from the tank once processing is complete. This may result in insufficient agitation of the processing solution over the surface of the material due to the presence of the support or restraint. Described herein is improved processing apparatus in which pairs of D-shaped rollers are located within respective ones of the processing tanks. When material is being processed, flat portions of each pair of D-shaped rollers are parallel to one another allowing clear access to the processing tanks. When processing is complete in a particular processing tank, rotation of each D-shaped roller of the pair associated with that tank about its respective axis brings the circular circumferential surfaces of each pair of rollers into contact to grip the material and direct it out of the processing tank.
摘要:
A liquid transfer system particularly suited for transferring a processing chemical between a reservoir and a tank in a photographic processing apparatus, comprises a liquid reservoir having an outlet which is connectable to the tank in the processing apparatus. The reservoir is connected to a source of pressurized gas which forces liquid to be transferred from the reservoir to the tank. The outlet of the reservoir is provided with a valve arrangement which serves to close the reservoir outlet when the liquid level in the reservoir drops below a predetermined level and prevents pressurized gas from escaping from the reservoir.
摘要:
A method for altering the pH of a photographic developing solution comprises altering the hydroxide ion concentration of the solution electrolytically. The method may be employed in photographic processing apparatus comprising a photographic development stage in which a photographic material to be processed is treated with a photographic developing solution wherein the apparatus comprises means for electrolytically altering the hydroxide ion concentration of the developing solution and means for controlling the operation of electrolytically altering the hydroxide ion concentration based on the change of hydroxide ion concentration in use.
摘要:
Described herein is apparatus for applying processing solution to a photographic material using a spray bar. The spray bar can be used to meter processing solution and/or air onto the material being processed, to agitate and/or mix processing solutions on the material using air jets, to air knife the material to remove processing solutions therefrom, and to dry the material.
摘要:
Described herein is a compact photographic processor which uses small volumes of processing solution to achieve effective processing without the need for process control. The processor comprises an applicator element (50) having a plurality of orifices formed along its length, a plurality of reservoirs (54, 56, 58) each containing processing solution, and a pressure system (60, 61, 62). The element (50) is connected to one side of the reservoirs (54, 56, 58) by means of a manifold (52), the other side of the reservoirs (54, 56, 58) being connected to the pressure system (60, 61, 62). The processing solutions may be dispensed from the element (50) as jets.
摘要:
A processor has a rotatable drum housed within an enclosure chamber. Processing solution is applied to the surface of the rotating drum and forms a film of solution around the periphery. The media to be processed is fed around the periphery of the rotating drum with its sensitized surface facing the drum.
摘要:
A drum chamber in which photographic material is processed is provided with a section in which the walls overlap to form a narrow channel therebetween. The channel acts as the entrance to and exit from the chamber for the material being processed.
摘要:
A method of reducing the volume of a processing tank by only filtering processing solution when it is either drawn into the tank and circulation system or when it is returned to the supply container.
摘要:
A low volume processing apparatus having a narrow processing channel has the processing solution entering via passages located towards the inlet and outlet of the channel. The solution leaves the channel via a passage located in the middle thereof, the flow of solution pulling the film into a fixed position within the channel. The reversal of flow minimizes the amount of air entrained with the returning flow.
摘要:
Apparatus for processing photographic material has a plurality of stages for carrying out different processing steps. At least one stage has a series of processing regions each defined by an inclined surface that extends between sets of rollers. The surfaces may be of different length to provide different residence times for the material. Processing solution flows down the surfaces whilst the photographic material is driven upwards in counter-current mode. All the stages may be uni-directionally inclined end-to-end, or they may be arranged in a U-shape so as to minimize cross-contamination between the stages.