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US 6,318,827 B1Granted
Method of improving print quality by selectively changing print direction
AssigneeHewlett-Packard Company
InventorsJames M Brenner, Ronald E Sheely, Marc A Yousey
Life of this patent
Estimating the term…
Abstract
An ink jet printer wherein unidirectional or bidirectional printing is adaptively selected for predetermined print modes as a function of whether bidirectional alignment has been performed.
Claims9
A method of operating an ink jet printer having a plurality of ink jet print elements that are reciprocatingly scanned along a scan axis relative to print media, comprising the steps of:
- selecting a print mode;
- determining whether a predetermined print mode has been selected;
- if a predetermined print mode has been selected, determining whether a bidirectional print alignment has been performed;
- bidirectionally printing with the ink jet printing elements if a predetermined print mode has been selected and if a bidirectional print alignment has been performed;
- and
- unidirectionally printing with the printing elements if the predetermined print mode has been selected and if a bidirectional print alignment has not been performed.
3 more elements
A method of operating an ink jet printer having a plurality of ink jet printheads that are reciprocatingly scanned along a scan axis relative to print media, comprising the steps of:
- selecting a print mode;
- determining whether a predetermined print mode has been selected;
- if a predetermined print mode has been selected, determining whether a bidirectional print alignment has been performed;
- bidirectionally printing with the ink jet printheads if a predetermined print mode has been selected and if a bidirectional print alignment has been performed;
- and
- unidirectionally printing with the ink jet printheads if the predetermined print mode has been selected and if a bidirectional print alignment has not been performed.
3 more elements
An ink jet printer comprising:
- a plurality of ink jet printing elements;
- a support structure for supporting the plurality of ink jet printing elements for reciprocating movement along a scan axis relative to print media;
- and
- a processor for causing bidirectional printing with the ink jet printing elements if a predetermined print mode has been selected and if a bidirectional print alignment has been performed, and for causing unidirectional printing with the ink jet printing elements if the predetermined print mode has been selected and if a bidirectional print alignment has not been performed.
1 more element
Dependencies are inferred from the claim text.