Charging device for applying an oscillating voltage to a member

Details Charging device for applying an oscillating voltage to a member Charging device for applying an oscillating voltage to a member

1994-04-21

1995-10-31

Beatty, Robert

Photocopying

Contact printing

Light boxes

G03G 1502

Patent

active

054634504

ABSTRACT:
A charging apparatus for electrically charging a member to be charged includes a charging member contactable to the member to be charged to electrically charge the member to be charged. The member to be charged includes a core. A voltage source for applying an oscillating voltage between the member to be charged and the charging member such that a frequency f (Hz) of the oscillating voltage, a Young's modulus E.sub.1 (N/m.sup.2) of the member to be charged, a Young's modulus E.sub.2 of the cure an outer circumferential length 1 (m) of the member to be charged, a thickness t.sub.1 (m) of the member to be charged, and a thickness t.sub.2 of the core satisfy:
f1.sup.2 /E.sub.1 t.sub.1.sup.3 +E.sub.2 t.sub.2.sup.3<1.5.times.10.sup.-2 Hz.m (200<f>1500 Hz)

REFERENCES:
patent: 4455078 (1984-06-01), Mukai et al.
patent: 5008706 (1991-04-01), Ohmor et al.
patent: 5089851 (1992-02-01), Tanaka et al.
patent: 5112708 (1992-05-01), Okunuki et al.
patent: 5146280 (1992-09-01), Kisu
patent: 5164779 (1992-11-01), Araya et al.
patent: 5272506 (1993-12-01), Goto

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