Pump apparatus for ink jet printer

Details Pump apparatus for ink jet printer Pump apparatus for ink jet printer

2006-03-28

2006-03-28

Vo, Anh T.N. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07018011

ABSTRACT:
A pump for an inkjet printer applying a negative pressure to an inkjet head nozzle, includes: a tube connected to the inkjet head nozzle and being U-shaped; a plurality of rollers which contact an inner arch of the tube and having a tapered shape; and a rotor to which the plurality of rollers are rotatably mounted. When the rotor rotates in a direction, at least one of the plurality of rollers rotate and squeeze the tube. When the rotor stops rotating, the plurality of rollers return to a state in which the plurality of rollers do not squeeze the tube due to a recovering force of the tube. The squeezing of the tube generates the negative pressure in the inkjet head nozzle.

REFERENCES:
patent: 4853717 (1989-08-01), Harmon et al.
patent: 5309180 (1994-05-01), Uchida
patent: 5898444 (1999-04-01), Kobayashi et al.
patent: 5910808 (1999-06-01), Fukasawa et al.
patent: 6364449 (2002-04-01), Takahashi et al.
patent: 6523931 (2003-02-01), Cipolla et al.

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