Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1989-01-31
1990-05-01
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
310339, 310800, G01D 1800, B41J 304
Patent
active
049222686
ABSTRACT:
Apparatus for determining inter-pen offsets in a multiple pen ink jet printer including a piezoelectric ink drop detector having a piezoelectric detector film having one or more openings formed therein. A carriage position sensor indicates the position of the carriage at the time a first ink drop is detected from each of the ink jet pens as the pens are scanned across an opening, whereby the sensed positions for the respective pens provides information indicative of inter-pen offset in the scan direction. For determination of inter-pen offset in the media scan direction, the piezoelectric film includes a plurality of openings, whereby the detect
o detect patterns for each of the pens provides information indicative of the inter-pen offsets.
REFERENCES:
patent: 4067019 (1978-01-01), Fleischer
patent: 4323905 (1982-04-01), Reitberger
patent: 4509057 (1985-04-01), Sohl
patent: 4709244 (1987-11-01), Piatt
patent: 4791435 (1988-12-01), Smith
patent: 4835435 (1989-05-01), Yeung
Griffin Roland I.
Hartary Joseph W.
Hewlett--Packard Company
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