Wet gate embodied in a photographic strip film printer

Photocopying – Projection printing and copying cameras – With temperature or foreign particle control

Patent

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Details

355 52, G03B 2752, G03B 2768

Patent

active

040824470

ABSTRACT:
A wet gate assembly in a photographic strip film printer having a pair of complementary gate halves demountably fastened together to form between opposed faces thereof a through strip film path from top entrance ends down to bottom exit ends thereof. A pair of light-transmitting optical windows having substantially aligned transverse central axes respectively are fitted into one of a pair of opposed apertures that are separately formed in these gate halves with these windows located in transversely spaced-apart relation on opposite sides of the film path to define a chamber therebetween. Cooperative leakage blocking means are provided on the opposed faces of the gate halves along opposite sides of the windows to close the sides of the chamber. Transverse leakage blocking means are cooperatively provided on the entrance ends of the gate halves for preventing leakage up out of the gate assembly chamber while permitting strip film to be drafted down therethrough between the transversely spaced windows. A pair of transverse manifolds are provided with one on each of the gate halves above the window in such gate half, and each manifold has means adapted to be connected to a source of pressurized liquid and provided with transversely spaced passage outlets communicating with the upper portion of the chamber. A pair of cooperating transverse squeegee rollers each rotatably mounted at the face of and by one of these gate halves below the window therein with at least an arcuate longitudinal zone of each roller extending laterally forward beyond the face of the gate half supporting it with the opposed arcuate longitudinal zones of these rollers biased toward longitudinal contact with each other; and these rollers extend laterally to cooperating positions relative to the side leakage blocking means and in cooperative sealing relation with respect to each other for closure of the bottom of the chamber.
Means behind each of these rollers defines in the gate half supporting the latter a transverse channel connectable to suction means for drawing off liquid from the chamber at said rollers while substantially blocking leakage below the latter.

REFERENCES:
patent: 2461668 (1949-02-01), Thompson
patent: 2987955 (1961-06-01), Sassenberg
patent: 3036216 (1962-05-01), Brody
patent: 3414353 (1968-12-01), Schwardt
patent: 3614223 (1971-10-01), Ott
patent: 3893763 (1975-07-01), Ott

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