Photocopying – Contact printing – Light boxes
Patent
1974-05-24
1976-02-03
Braun, Fred L.
Photocopying
Contact printing
Light boxes
354323, 355 10, G03D 1300, G03D 308
Patent
active
039368548
ABSTRACT:
An apparatus for the liquid processing or development of a latent image on a photographic or electrostatic material utilizes a single liquid, usually referred to as a monobath, for developing the latent photographic image or a liquid developer, which comprises a liquid carrier and toner particles, for developing the latent electrostatic image.
The apparatus comprises two members between which the material is clamped during the development process. The first member which is fixed, has an open-end chamber that is interconnected to two sources of air under pressure and to a reservoir for at least one processing fluid. This chamber is also provided with two concentrically arranged sealing means for retaining the processing fluid in proper relation to the image area being developed when the material is clamped between the two members. The second member also has an open-end chamber which is enclosed by a transparent support and is movable relative to the first member for clamping the material therebetween via the sealing means. After the processing fluid has been introduced for developing the latent image, two air flows of different duration are then introduced into the chamber of the first member. The one flow of air removes and squeegies any remaining fluid within the confines of the inner sealing means off the surface of the material and carries it away in a mist or in a finely atomized condition. The other flow, which is of shorter duration, breaks the inner sealing means in order to remove any residual fluid that may have accumulated at its sealing position relative to the material. The apparatus is therefore intended primarily for a cycle of operation with respect to a strip or sheet of material that is moved intermittently rather than continuously relative to the apparatus.
REFERENCES:
patent: 2476007 (1949-07-01), Tuttle et al.
patent: 2631511 (1953-03-01), Tuttle
patent: 2922353 (1960-01-01), Berley
patent: 3060829 (1962-10-01), Leighton et al.
patent: 3081687 (1963-03-01), Takats
patent: 3149550 (1964-09-01), Lohse et al.
patent: 3619053 (1971-11-01), Mannik
patent: 3744394 (1973-07-01), Firth
Braun Fred L.
Eastman Kodak Company
Husser J. D.
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