Neutral pressure magnet roll type developing unit

Details Neutral pressure magnet roll type developing unit Neutral pressure magnet roll type developing unit

1990-12-13

1992-02-18

Moses, R. L.

Photocopying

Contact printing

Light boxes

355215, 118657, G03G 1509

Patent

active

050898523

ABSTRACT:
A developer housing of an electrostatographic reproducing machine of the type using a magnet roll is provided with two openings in at least one of its side walls. The first of these holes is located at the high pressure portion of the housing, and the second of the holes is located at the low pressure end of the housing. The holes are interconnected by a pneumatic duct. A pressure differential is created as vane-like whiskers of developer are rotated about the magnet roll. The duct neutralizes these pressure differentials within the developer housing, thus preventing toner from being blown out of the developer housing.

REFERENCES:
patent: 4377334 (1983-03-01), Nishikawa
patent: 4583112 (1986-04-01), Morano et al.
patent: 4666282 (1987-05-01), Rowe
patent: 4800411 (1989-01-01), Tanaka et al.
patent: 4963930 (1990-10-01), Yoshimaru et al.

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