Process and apparatus for replenishing developer in photoprintin

Details Process and apparatus for replenishing developer in photoprintin Process and apparatus for replenishing developer in photoprintin

1974-12-18

1977-05-10

Braun, Fred L.

G03D 1300

Patent

active

040231933

ABSTRACT:
A process for replenishing developing medium in a developing chamber of a photoprinting machine and apparatus for performing the process. The process and apparatus for performing it utilizes at least one photocell in combination with various electrical and optical elements for measuring the concentration of developing medium in the developing chamber, comparing the measured value to a nominal value, and controlling the replenishing of the developing medium correspondingly.

REFERENCES:
patent: 2296048 (1942-09-01), Planskoy
patent: 2617940 (1952-11-01), Giguere
patent: 2674696 (1954-04-01), Smith et al.
patent: 3597075 (1971-08-01), Kobayashi
patent: 3650196 (1972-03-01), Hosoe et al.
patent: 3712203 (1973-01-01), Kishi et al.
patent: 3781910 (1973-12-01), Herrmann

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