Positioning of service station and paper pick pressure plate usi

Details Positioning of service station and paper pick pressure plate usi Positioning of service station and paper pick pressure plate usi

1994-08-12

1996-09-24

Barlow, Jr., John E.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347104, B41J 2165

Patent

active

055595383

ABSTRACT:
Structure according to the invention simultaneously controls operation of a sled assembly for servicing of an inkjet print cartridge and a mechanism for controlling advancement of a print medium into a printing path. The structure according to the invention can be used with either a facsimile machine that uses thermal inkjet printing, or with a thermal inkjet printer. In one embodiment, the structure includes a sled assembly which further includes at least one wiper and at least one cap, a paper pick pressure plate, and a mechanism for simultaneously controlling movement of the sled assembly and the pressure plate. The paper pick pressure plate is controlled to selectively contact a paper pick roller such that the print medium is advanced through the printing path when the pressure plate contacts the pick roller and the print medium is not advanced through the printing path when the pressure plate does not contact the pick roller. In a further embodiment, the mechanism for simultaneously controlling further comprises a dual cam mechanism. A cam ring of the dual cam mechanism interacts with a cam follower to move the sled assembly and a cam of the dual cam mechanism contacts the pressure plate to move the pressure plate directly.

REFERENCES:
patent: 4872026 (1989-10-01), Rasmussen et al.
patent: 5138343 (1992-08-01), Aichi et al.
patent: 5201873 (1993-04-01), Kikuchi et al.
patent: 5440331 (1995-08-01), Grange
patent: 5448271 (1995-09-01), Yamaguchi et al.
Set of three assembly drawings of a service station, developed by Hewlett-Packard Company, that was part of a printer believed to have been commercially avaialble in Jul. 1993.

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