Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1994-04-29
1997-03-25
Barlow, Jr., John E.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 24, B41J 2165
Patent
active
056149298
ABSTRACT:
A thermal ink jet printhead cartridge priming apparatus that includes a plurality of caps respectively associated with a plurality of printhead nozzle arrays for controllably sealing printhead nozzle arrays pursuant to engagement thereof against the printhead cartridge to surround the nozzle arrays, a plurality of vacuum conveying elements respectively associated with the caps for individually conveying priming vacuum to an associated cap, a manually actuated selector assembly for connecting a selected one of the vacuum conveying elements to a source of priming vacuum, and a source of priming vacuum spaced apart from the manually actuated selection means for selectively engaging the selector assembly for application of vacuum thereto, such that a selected printhead cartridge is primed without removal thereof from the carriage and without use of a motorized vacuum pump. By separating the vacuum source from the selector, positive pressure is not applied to the nozzle arrays when the caps are brought into engagement with the printhead cartridges since venting is provided by the unobstructed vacuum conveying elements.
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Patent Abstracts of Japan, vol. 16, No. 456 (M-1314) 22 Sep. 1992 & SP-A-04 161 343 (I. Takuro) 4 Jun. 1992.
Bauer Stephen W.
Dangelo Michael T.
Glassett Kevin L.
Barlow Jr. John E.
Hewlett--Packard Company
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