Incremental printing of symbolic information – Ink jet – Ejector mechanism
Patent
1993-04-30
1995-09-19
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Ejector mechanism
347 19, 347107, B41J 2300
Patent
active
054519900
ABSTRACT:
A test pattern for use with an optical sensor for an inkjet printer. The inventive pattern comprises a first plurality of vertical bars horizontally spaced and a second plurality of horizontal bars vertically spaced. The spacing between the bars is approximately equal to the width of the bars. In a particular implementation, the pattern is adapted for use with an inkjet printer having a plurality of pens. The first plurality of bars includes a first set of bars printed by each of the pens. The first plurality of bars includes a second set of bars printed by one of the pens moving at at least two different horizontal speeds. The second plurality of bars includes one column of vertically spaced bars for each of the pens. Each column of vertically spaced bars includes a first plurality of vertically spaced bars printed by a first pen. A respective column of vertically spaced bars includes a second plurality of vertically spaced bars printed by a respective one of the pens. Each column of vertically spaced bars includes a third plurality of vertically spaced bars printed by the first pen. The inventive pattern allows for considerable information with respect to pen alignments to be determined by optical scanning.
REFERENCES:
patent: 4222060 (1980-09-01), Sato et al.
patent: 4449052 (1984-05-01), Krieg
patent: 4524364 (1985-06-01), Bain et al.
patent: 4878063 (1989-10-01), Katerburg
patent: 5172190 (1992-12-01), Kaiser
patent: 5216257 (1993-06-01), Brueck et al.
Beauchamp Robert
Cobbs Keith E.
Sorenson Paul R.
Barlow John E.
Fuller Benjamin R.
Hewlett--Packard Company
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