Microfiche developer

Details Microfiche developer Microfiche developer

1977-08-12

1978-10-24

Griffin, Donald A.

G03D 700

Patent

active

041224752

ABSTRACT:
A microfiche developer of a type which includes upper and lower walls that are slightly spaced to receive a microfiche, and which also includes a seal extending around a region between the plates where the microfiche lies, to seal this region when pressured ammonia or other developer is introduced through a conduit in the lower wall into this region to develop a microfiche therein. Passages are formed in the upper wall to receive air during the period when ammonia is pumped into the sealed region, to draw the microfiche up against the upper wall so that all of the lower face of the microfiche which carries the emulsion, is exposed to the developer. The seal is an elastomeric ring with radially inner and outer flanges that are held down and sealed to the lower wall, a middle portion which can be deflected up against the upper wall, and intermediate portions which lay up against the supporting wall portions when the middle portion is deflected up.

REFERENCES:
patent: 2000390 (1935-05-01), Huebner
patent: 3323436 (1967-06-01), Hafer et al.
patent: 3364833 (1968-01-01), Mulvany
patent: 3528355 (1970-09-01), Blackert
patent: 3705769 (1972-12-01), Johannsmeier

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