Process and apparatus for developing diazotype material

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G03D 700

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039848566

ABSTRACT:
An apparatus for the continuous development of a diazotype material with a developer powder in which the developer powder is disposed in a hollow body, such as a rotatable drum, a fine-meshed network having openings smaller in cross-section than the cross-section of the smallest grains of the powder, such as a metal screen, forms at least a part of the walls of the hollow body and a transport device, such as an endless belt, moves the diazotype material relative to and in contact with the side of the network opposite the developer powder. Optionally a heating device may be disposed in the hollow body, a heating device may be disposed adjacent the hollow body to heat the diazotype material after it passes the hollow body, and a replenishing device, such as a hollow porous bar, may be disposed in the hollow body with a scanning device adjacent the diazotype material and operatively connected thereto to supply developer medium to the replenishing device in accordance with the area of the diazotype material to be developed.

REFERENCES:
patent: 2228562 (1941-01-01), Dieterle
patent: 2257207 (1941-09-01), Von Meister et al.
patent: 2431041 (1947-11-01), Hassler
patent: 2918858 (1959-12-01), Dieterle
patent: 3472143 (1969-10-01), Hixon et al.
patent: 3472657 (1969-10-01), Mayer et al.
patent: 3538837 (1970-11-01), Moraw

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