Method of compensating sheet feeding errors in ink-jet printer

Incremental printing of symbolic information – Ink jet – Controller

Reexamination Certificate

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Details

C347S016000

Reexamination Certificate

active

07083251

ABSTRACT:
A method of compensating a sheet feeding error in an ink-jet printer includes printing a test pattern on the sheet; scanning the printed test pattern using the image sensor and measuring a distance W1between a starting point X1sand an ending point X1eof the test pattern; driving the feeding roller and moving the sheet to a set distance Hmso that the set distance Hmis shorter than a length of the test pattern in a sheet feeding direction; scanning the test pattern using the image sensor and measuring a distance W2between a starting point X2sand an ending point X2eof the test pattern; calculating a distance H, along which the sheet is actually fed, from a difference between the distances W2and W1; calculating a feeding error E of the sheet from a difference between the feeding distance H and the set distance Hm; and compensating for the sheet feeding error E at the set distance Hm.

REFERENCES:
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patent: 6755499 (2004-06-01), Castano et al.
patent: 2003/0025922 (2003-02-01), Otsuki
patent: 1 211 084 (2000-11-01), None
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European Search Report; Dated: Jun. 23, 2004.

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