Bidirectional ink jet printing with head signature reduction

Details Bidirectional ink jet printing with head signature reduction Bidirectional ink jet printing with head signature reduction

1994-10-27

1997-04-08

Fuller, Benjamin R.

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 40, 400323, B41J 2300, B41J 1930

Patent

active

056192339

ABSTRACT:
A method and apparatus for operating an ink jet printer of the type which prints a swath of the image at a time with each transit across a sheet. An image portion corresponding to a potential swath is examined, particularly determining for each column whether any breaks occur at any point in a relevant portion of the column. If no breaks are found in any single column, the swath and the next swath are printed unidirectionally. However, if breaks are found at acceptable locations in every column, the swath and the next swath can be printed bidirectionally. For each column, the pattern of bits in the column above the break points in each column are directed to the print buffer to be printed in the first swath, while the remaining bits will be sent to a buffer for the next swath. The distance for the next paper advance is calculated, considering the locations of the breakpoints.

REFERENCES:
patent: 4553867 (1985-11-01), Nakai
patent: 5044796 (1991-09-01), Lund
patent: 5511890 (1996-04-01), Momose

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