Toner seal for developing unit in process cartridge

Details Toner seal for developing unit in process cartridge Toner seal for developing unit in process cartridge

1990-05-29

1992-08-04

Moses, R. L.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

118651, 355215, 355245, 355260, G03G 1508

Patent

active

051349604

ABSTRACT:
A developing apparatus includes an elastic blade contacted to a developing roller to regulate a thickness of a layer of a developer to be formed on the developing roller. To the longitudinal end portions of the developing roller, seals are press-contacted to prevent leakage of the developer. Each of the seals has a projection toward the longitudinally central portion of the developing roller. The projection is overlaid on the blade at a position where the blade and the developing roller are contacted.

REFERENCES:
patent: 3809012 (1974-05-01), Delvecchio
patent: 4341179 (1982-07-01), Hosono et al.
patent: 4373468 (1983-02-01), Suda et al.
patent: 4387664 (1983-06-01), Hosono et al.
patent: 4575221 (1986-03-01), Onoda et al.
patent: 4596455 (1986-06-01), Kohyama et al.
patent: 4616918 (1986-10-01), Kohyama et al.
patent: 4676192 (1987-06-01), Yuge et al.
patent: 4785319 (1988-11-01), Fujino et al.

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