摘要:
Described herein is processing apparatus in which processing solution can be applied in precise quantities to the sensitive surface of a photographic material. The apparatus includes at least one processing stage in which an endless belt is utilized to support the material and to guide it through the processing stage. Applicator devices are positioned above the surface of the belt for applying processing solution to the material. The applicator device can include an upper roller and two lower rollers confined in a cage, with the upper roller forcing the lower rollers apart inside the cage. A metering means is positioned to allow processing solution to flow onto the upper roller and then down onto lower rollers, with the lower rollers (44, 46) applying processing solution to the material.
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:
Film cassettes normally include a spool on to which a film strip is wound. However, the film strip is normally fixed to the spool and needs to be severed therefrom prior to processing. A releasable attachment connects a film strip (50) to a spool (30). The spool (30) comprises an outer portion (32) and an inner portion (34) which is rotatable relative to the outer portion (32). The outer portion (32) has a slot (38) formed therein into which the film strip (50) is inserted. The inner portion (34) carries a tongue member (42) which engages an aperture (54) formed in the film strip (50) as the inner portion (34) is rotated relative to the outer portion (32) about an axis (36). The film strip (50) is released by rotating the inner portion (34) in the reverse direction.
摘要:
A method of releasably attaching a filmstrip to the spool of a film cassette. The method includes inserting the filmstrip into a slot until an aperture in the filmstrip engages with a protrusion located in the slot of the spool. Subsequent withdrawal of the filmstrip is achieved by further inserting the filmstrip into the slot to disengage the aperture and the protrusion, moving the filmstrip in a direction transverse to the direction of insertion into the slot to misalign the aperture and the protrusion and then withdrawing the filmstrip from the slot in a direction which is reverse to that of insertion.
摘要:
Film cassettes normally include a spool on to which a filmstrip is wound. However, the filmstrip is normally fixed to the spool and needs to be severed therefrom prior to processing. Herein is a spool for a film cassette in which a filmstrip can easily be attached to and detached from the spool. The spool comprises a body portion carrying a pair of flange members and having a slot formed therein, the slot having a pair of shoulders and a protrusion. A pair of pin members are also provided in the body portion. A filmstrip is inserted into slot under shoulders and over protrusion until an aperture therein engages with the protrusion to retain the filmstrip. Inwardly applied pressure to the pin members pushes the filmstrip upwardly so that the aperture clears the protrusion to allow the filmstrip to be detached from the spool.
摘要:
It is well known to process photographic materials in web and sheet form by passing the material through a photographic processor which comprises a plurality of processing stages. The material being processed is substantially immersed in the solution in each of the processing stages which results in the use of large volumes of processing solutions. Described herein is a multi-tank processing bath which utilizes low volumes of processing solution and in which the rate of flow of processing solution through the multi-tank processing bath is matched with the transport speed of the material being processed so that the processing solution effectively travels with the portion of the material being processed which it encounters when first introduced into the processing bath. This means that the processing solution is fully exhausted by the time it reaches the end of the processing bath and can be discarded. This ensures that each part of the material being processed has new processing solution.
摘要:
In known photographic apparatus, processing is achieved by passing the material to be processed from one processing stage to the next in a predetermined sequence. This necessitates that the processing stages are sequentially arranged in the apparatus. However, if the material being processed requires more than one identical processing step, for example, two or more wash processes, the processing stages need to be duplicated. Described herein is apparatus in which the processing stages need not be duplicated and in which the stages may be arranged accordingly. The apparatus comprises a rotating drum 10,(110) on which the material (16) to be processed is mounted, and a multi-tank container 12,(112) housing a plurality of compartments (120, 122, 124, 126, 128), each compartment containing one of the desired processing solutions (130, 132, 134, 136, 138). Application rollers (140, 142, 144, 146, 148) are associated with respective ones of the compartments (120, 122, 124, 126, 128) for transferring the processing solutions contained therein on to the material (16) being processed. Each application roller (140, 142, 144, 146, 148) moves from a first position where no contact is made with the rotating drum to a second position where contact is made with the rotating drum (110) to effect the transfer of processing solution. Additionally, an exposing device (116) may be provided for forming an image on the material (16) to be processed prior to processing.
摘要:
A method of processing an imagewise exposed photographic material in a processing solution which is unstable to the extent that it deteriorates without external reaction in which the photographic material is passed through a tank containing the solution characterized in that the solution is circulated through the tank at a rate of from 0.1 to 10 tank volumes per minute.
摘要:
The method and apparatus supplies processing solution directly to the surface of a web of sensitized material by means of a movable applicator. The web and applicator are moved relative to each other to enable good mixing of the solution on the surface. The movable applicators can be moved in and out of contact with the material as required so that the process can be varied.
摘要:
Photosensitive material is processed by passing the material through a chamber holding processing solution, the temperature of the solution being raised as the material passes through the chamber.