Photocopying – Contact printing – Light boxes
Patent
1994-12-19
1996-07-23
Braun, Fred L.
Photocopying
Contact printing
Light boxes
354324, 417420, G03G 1510, F04B 1700
Patent
active
055395031
ABSTRACT:
A liquid toner cartridge is provided with internal rotary agitation. The cartridge employs a magnetically-coupled drive, which requires no seals, to provide power to an internal pump and agitation system. The magnetically-coupled drive shaft falls in line with the pump and agitation device. Venting is through a single liquid supply/return line. When the line empties between pumping cycles, the cartridge can vent to the atmosphere. During pumping, a flexible tank, external to the liquid toner cartridge, partially collapses, but returns to original shape when toner has returned at the end of each development cycle. At this point, the supply/return line is again opened to the atmosphere for venting. This action always maintains space for the rotary agitation system.
REFERENCES:
patent: 4248514 (1981-02-01), Watkins
patent: 4378151 (1983-03-01), Muller et al.
patent: 4890131 (1989-12-01), Kuzyk et al.
patent: 5043756 (1991-08-01), Takabayashi et al.
patent: 5153659 (1992-10-01), Maiefski et al.
patent: 5423661 (1995-06-01), Gabeler et al.
patent: 5466131 (1995-11-01), Altham et al.
Braun Fred L.
Hewlett--Packard Company
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