Toner cartridge hopper with labyrinth channels for releasing...

Details Toner cartridge hopper with labyrinth channels for releasing... Toner cartridge hopper with labyrinth channels for releasing...

2005-08-16

2005-08-16

Grainger, Quana (Department: 2852)

Electrophotography

Internal machine environment

Particle or contaminant control

C399S262000

Reexamination Certificate

active

06931224

ABSTRACT:
A vent integral with the top surface of toner hopper (5) having three labyrinth channels (3a-3c) oriented in one direction and three labyrinth channels (3d-3f) oriented in an orthogonal direction. Each labyrinth communicates with the inside of the hopper by a hole (13a-13f) and the end of each labyrinth communicates with filter pad (7) held in a basin (11) formed in the top surface of hopper (5). Cover (9) closes the vent except for hole (15) over the center of pad (7).

REFERENCES:
patent: 5758231 (1998-05-01), Coffey et al.

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