Device for fixing recordings consisting of powdery material appl

Details Device for fixing recordings consisting of powdery material appl Device for fixing recordings consisting of powdery material appl

1982-04-19

1984-03-27

Camby, John J.

Heating

Advancing structure flexing, looping or coiling sheet, web...

34157, 34242, 432242, F27B 928, F27D 118, F26B 1300, F26B 2500

Patent

active

044391447

ABSTRACT:
A solvent vapor toner image fixing device for use with electrostatic printing or copying devices having a well-shaped container through which a paper web is guided in a loop shaped manner is provided with improved apparatus for sealing the operational opening of the container against the emergence of solvent vapor. The sealing means comprises a wedge-shaped sealing strip disposed beneath the upper reversing drum which conducts the paper web out of the container. The sealing strip defines an air flow gap with the drum which permits an introduction of air flow into the upper end of the container from which it exits through a narrow gap formed between an upper edge container wall and the upper surface of the paper guide member, thus forming a pressure zone at the upper end of the container which resists passage of solvent vapor out of the container. The assembly further includes a discharge housing through which the paper web immediately passes upon leaving the container. The discharge housing is provided with a forced air flow in counterflow relationship to the movement of the paper web such that solvent residues are evaporated from the paper web and prevented from being conducted away from the fixing station on the recording medium.

REFERENCES:
patent: 2873597 (1959-02-01), Fahringer
patent: 2909980 (1959-10-01), Wilde
patent: 3078589 (1963-02-01), Carlson
patent: 4264304 (1981-04-01), Hausmann

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