Photocopying – Contact printing – Light boxes
Patent
1993-10-20
1995-03-07
Braun, Fred L.
Photocopying
Contact printing
Light boxes
354324, 355200, G03G 1510
Patent
active
053963164
ABSTRACT:
A user-replaceable liquid toner cartridge fits into a receptacle in an EP printer. The receptacle includes automatic fluid and mechanical connectors that mate with the cartridge upon its insertion. The cartridge includes a liquid toner supply reservoir, a pump connected to an outlet from the reservoir; a mechanical coupling that automatically engages a pump actuator that extends from the receptacle; and a three-port valve. The three-port valve is connected to an output from the pump and has a first port that communicates with the reservoir and a second port that communicates with an external wall of the cartridge. The fluid connector automatically connects to a fluid fitting in the receptacle upon insertion of the cartridge. The fluid fitting in the receptacle also automatically operates the valve in the cartridge and redirects liquid toner flow from a recirculation path to the cartridge's reservoir and directs it into the receptacle's fluid fitting.
REFERENCES:
patent: 3062123 (1962-11-01), Limberger
patent: 3601029 (1971-08-01), Needleman
patent: 3650196 (1972-03-01), Hosoe et al.
patent: 3868715 (1975-02-01), Slavin
patent: 4398818 (1983-08-01), Jeromin et al.
patent: 4968998 (1990-11-01), Allen
Braun Fred L.
Hewlett--Packard Company
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