Method and apparatus for correcting printing error

Details Method and apparatus for correcting printing error Method and apparatus for correcting printing error

2007-05-29

2007-05-29

Meier, Stephen (Department: 2853)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000

Reexamination Certificate

active

10758128

ABSTRACT:
A method for correcting a printing error in an inkjet printer having a printer head on which the 1stthrough 2Nthnozzles are provided, in which N is a positive integer greater than 0, and a feed roller, the method including: determining whether a trailing end of a print paper has escaped from the feed roller which periodically moves the print paper the width of the printer head; if the trailing end of the print paper is determined to have escaped from the feed roller, moving the print paper half the width of the printer head and printing a reference line by ejecting ink at a predetermined interval using a kthnozzle (1≦k≦N) among the 1stthough Nthnozzles disposed above the print paper; moving the print paper on which the reference line is printed half the width of the printer head and printing comparison lines by ejecting ink at a predetermined interval using the (N+1)ththrough 2Nthnozzles disposed above the print paper; detecting an error distance between the reference line and the comparison line printed by the lthnozzle (N+1≦l≦2N) disposed at a position corresponding to the kthnozzle among the (N+1)ththrough 2Nthnozzles; and correcting a distance that the print paper moved according to the detected error distance.

REFERENCES:
patent: 6076915 (2000-06-01), Gast et al.
patent: 6390698 (2002-05-01), Yoshida et al.
patent: 2002/0070998 (2002-06-01), Bloomberg

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