초록 ▼

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 c

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.

대표청구항 ▼

A diazo sheet material developer comprising an inner ammonia developing chamber, means for supplying ammonia vapor thereto for developing said diazo sheet material as it passes through the developing chamber, said developer having sheet material inlet and outlet apertures, sheet feeding means for pa

A diazo sheet material developer comprising an inner ammonia developing chamber, means for supplying ammonia vapor thereto for developing said diazo sheet material as it passes through the developing chamber, said developer having sheet material inlet and outlet apertures, sheet feeding means for passing said diazo sheet material through said apparatus, and said developer having an outer vapor collection and disposal plenum surrounding and enclosing the developing chamber for collecting and removing ammonia vapor, said collection plenum having openings therein to admit outside air and an air blower means communicating with said outer plenum for drawing air from the outside atmosphere in through said openings and for expelling the air and any vapor therein to a vapor disposal means, whereby ammonia vapor that escapes from the ammonia developing chamber enters the collection plenum and is withdrawn therefrom and passed to the vapor collection means, the ammonia is supplied to the developing chamber by a pump and the pump is enclosed within the plenum.