Developing unit housing with toner seals for image recording app

Details Developing unit housing with toner seals for image recording app Developing unit housing with toner seals for image recording app

1992-01-30

1993-05-18

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

118653, 355259, G03G 1508

Patent

active

052125211

ABSTRACT:
A developing unit includes a housing frame containing toner and having an opening; a developing roller rotatably mounted on the housing frame so as to face the opening of the housing frame; a thin blade which is in contact with a surface of the developing roller and scrapes off the toner adhered to the surface of the developing roller so that a thin toner layer is formed on the surface of the developing roller, the toner being supplied from the thin toner layer to a photosensitive belt: and a sealing sheet for sealing a continuous gap formed of a first gap between each end of the developing roller and the housing frame and a second gap between each end of the thin blade and the housing frame, the sealing sheet being divided into a first sealing sheet for sealing the first gap and a second sealing sheet for sealing the second gap.

REFERENCES:
patent: 5035198 (1991-06-01), Niito
patent: 5057868 (1991-10-01), Sekino et al.
patent: 5073797 (1991-12-01), Ono et al.

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