Charging component for electrophotographic process containing a

Details Charging component for electrophotographic process containing a Charging component for electrophotographic process containing a

1993-02-03

1994-08-30

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Charging simultaneous with imaging

430937, 428213, G03G 1302

Patent

active

053427173

ABSTRACT:
A direct contact type charging component for use in electrophotographic process containing a protective surface layer which comprises a polyether-ester-amide block copolymer. The copolymer is environmentally stably having a volume resistivity between 10.sup.6 Ohm-cm and 10.sup.12 Ohm-cm and a Shore hardness between Shore D 5 and Shore D 90. During the electrophotographic process, a voltage is applied externally to the charging component to cause a charged component, which typically comprises a photo-conductive drum, to become electrostatically charged. In the preferred embodiment, the voltage consists of a direct voltage of .+-.200 to .+-.2,000 V overlapped with an alternating voltage having a peak-to-peak voltage of 4,000 V.

REFERENCES:
patent: 4649097 (1987-03-01), Tsukada et al.
patent: 5069955 (1991-12-01), Tse et al.

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