Process and apparatus for converging developing vapors in diazocopy machines
AssigneeRhone-Poulenc Systemes
InventorClaude Michel
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Abstract
The invention relates to an improvement in diazocopy development machines. A development chamber is used in which ammonia vapors are generated. A converging system made up of converging walls which accelerate the hot ammonia vapors, without additional means, channels the vapors toward the copy support. Thus, a striking is made of the support with the vapors and the development speed can be significantly increased.
Claims6
An apparatus for developing a copy support coated with a diazo sensitive layer previously exposed through an original in an ultraviolet exposure station, said apparatus comprising:
- (a) chamber means for enclosing a developing system;
- (b) forming means for forming ammonia vapors within said chamber means;
- (c) guide means for guiding and moving the copy support within the chamber means;
- (d) converging means for converging the ammonia vapors formed by said forming means onto the copy support as the copy support is moved past the converging means and within the chamber means;
- and
- (e) accelerating means for accelerating the ammonia vapors and concentrating the ammonia vapors onto the sensitive layer of the copy,
- wherein said converging means and accelerating means is a single static converging means applying the ammonia vapors by a venturi effect created by static converging means, said converging and accelerating means not requiring any means of addition of external energy.
A process for developing a copy support coated with a diazo sensitive layer previously exposed through an original in an ultraviolet exposure station, the process comprising the steps of:
- creating ammonia vapors at a temperature equal to or above 55.degree. C.
- guiding the copy support within a chamber enclosing the ammonia vapors;
- accelerating the vapors upward by an aerodynamic venturi effect, without applying any additional external energy;
- and
- converging the ammonia vapors directly onto the copy support with an angle of incidence less than or equal to 45.degree., whereby the ammonia vapors striking the copy support are in a state of turbulence.
Dependencies are inferred from the claim text.