Charging member and electrophotographic apparatus using the same

Details Charging member and electrophotographic apparatus using the same Charging member and electrophotographic apparatus using the same

1990-07-05

1991-05-21

Grimley, A. T.

Photocopying

Contact printing

Light boxes

29130, 29132, 361225, 430 35, G03G 1502, G03G 1302

Patent

active

050179659

ABSTRACT:
A charging member having a surface layer which comprises a polyurethane resin prepared from a raw material for polyurethane containing an isocyanate group and a hydroxyl group; the raw material having a molar ratio between the isocyanate (NCO) group and hydroxyl group satisfying the following relationship:

REFERENCES:
patent: 3737310 (1973-06-01), Snelling et al.
patent: 3784294 (1978-01-01), Wells
patent: 4259003 (1981-03-01), Mangal et al.
patent: 4494857 (1985-01-01), Ueno et al.
patent: 4727453 (1988-02-01), Ewing
patent: 4922299 (1990-05-01), Uchimoto et al.
patent: 4959688 (1990-09-01), Koitabashi
patent: 4967231 (1990-10-01), Hosoya et al.

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