Diazo developing apparatus

Details Diazo developing apparatus Diazo developing apparatus

1981-02-13

1982-11-23

Hix, L. T.

354300, 354319, 34242, 29132, G03D 700

Patent

active

043602592

ABSTRACT:
A diazo developer is described which is useful for both ammonia vapor developing and for thermal developing. A heated chamber is provided with inlet and outlet slots through which the sheets pass during operation. Adjacent the inlet slot is a pair of inlet rollers that carry the sheets through the chamber. Adjacent the outlet slot is a pair of outlet rollers. At least some of the rollers are driven by a motor and one or more are preferably yieldably biased toward its mating roller, e.g. by the provision of a thin ribbon-shaped sealing strip engaged against the roller at a point opposite the nip or contact line between the rollers to yieldably bias them together while at the same time sealing the chamber against the leakage of vapor when used. Side plates are provided at the ends of the rollers and resilient gasket sheets formed from elastomeric material are compressed between the roll ends and the fixed side plates to seal the chamber. Heaters such as electrical resistance heaters are continuously supported along their length by the developing chamber wall. The rollers have metal interiors and elastomeric hose members engaged over the rollers elastically have precision ground surfaces that carry the sheets through the apparatus.

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"Burgess Diazo and Thermal Film Developers", Burgess Industries.

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