Developing unit having optical detection of a residual quantity

Details Developing unit having optical detection of a residual quantity Developing unit having optical detection of a residual quantity

1994-11-15

1997-07-15

Brase, Sandra L.

Electrophotography

Diagnostics

Consumable

399 27, G03G 1508

Patent

active

056492642

ABSTRACT:
A developing unit including a developer container for accommodating a developer, a first window portion which is formed in an upper portion of the developer container and through which light passes, a second window portion which is formed in a lower portion of the developer container and through which light passes, a first wiping member for wiping the first window portion, a second wiping member for wiping the second window portion, and a holding member for holding the first wiping member and the second wiping member at opposite ends of said holding member, wherein the holding member performs a reciprocating operation with respect to a supporting point.

REFERENCES:
patent: 5035198 (1991-07-01), Nito
patent: 5036358 (1991-07-01), Yoshida
patent: 5045886 (1991-09-01), Weitzel et al.
patent: 5124751 (1992-06-01), Fukui et al.
patent: 5237372 (1993-08-01), Ishii et al.
patent: 5317369 (1994-05-01), Nakanishi
patent: 5398106 (1995-03-01), Eguchi

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