Cap device for an ink jet recording head

Details Cap device for an ink jet recording head Cap device for an ink jet recording head

1993-03-30

1995-05-16

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 30, B41J 2165

Patent

active

054165075

ABSTRACT:
A cap device for an ink jet recording head includes a cap, a cap holder, a cylinder, a piston, and a cylinder driver. The cylinder includes therewithin a pump chamber of which the volume increases when the cylinder advances and decreases when the cylinder retracts, an ink discharge path, and communication control unit. When the cylinder advances to increase the volume of the pump chamber, the communication control unit disconnects the pump chamber from the ink discharge path, and when the cylinder retracts to decrease the volume of the pump chamber, the communication control unit connects the pump chamber with the ink discharge path. The piston includes an ink flow path of which the front end communicates with the through-hole and the rear end communicates with the pump chamber within the cylinder when the cylinder advances to reach a predetermined position.

REFERENCES:
patent: 4410900 (1983-10-01), Terasawa

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