Printhead capping mechanism with rotary platen assembly

Details Printhead capping mechanism with rotary platen assembly Printhead capping mechanism with rotary platen assembly

2005-11-29

2005-11-29

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S042000, C347S044000, C347S047000

Reexamination Certificate

active

06969144

ABSTRACT:
A pagewidth inkjet printer is described which includes printhead11with a plurality of print nozzles30for ejecting ink drops towards a print medium. A space is defined between the nozzles and a nozzle guard43with a series of apertures44aligned with the nozzles.During printing operation, positive air pressure is supplied to this space, the air exiting the space through the apertures, preventing blockage by paper dust. When not printing, the air supply is closed off by air valve member66and a capping member80on a rotary platen14contacts the printhead to maintain a closed atmosphere at the surface of the nozzles, reducing drying of ink on the nozzles.

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