Ink jet recording apparatus and pump mechanism for use therewith

Details Ink jet recording apparatus and pump mechanism for use therewith Ink jet recording apparatus and pump mechanism for use therewith

1993-12-30

1994-10-18

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

B41J 2165

Patent

active

053572750

ABSTRACT:
A pump mechanism of an ink jet recording apparatus comprises a pump having a suction portion for sucking from a sucked member, said pump switching between the suction and non-suction operation of the suction portion by a reciprocating motion of a piston within a cylinder, without having a valve, a carrying member connected to said pump for carrying waste ink from said pump said carrying member opening to the atmosphere and a prevention mechanism for preventing a backflow of ink within said pump from the suction portion of said pump, to the outside of said pump which is caused by the reciprocating motion of the piston said prevention mechanism being an internal pump mechanism.

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