Ink jet recording apparatus and ink jet recording method

Details Ink jet recording apparatus and ink jet recording method Ink jet recording apparatus and ink jet recording method

1998-11-10

2000-11-14

Nguyen, Thinh

Incremental printing of symbolic information

Ink jet

Ejector mechanism

347 9, 347 16, B41J 2145, B41J 215, B41J 2938

Patent

active

061459607

ABSTRACT:
An ink jet recording apparatus which carries out, in a decimated multipass print mode, paper transfer by an extra amount (2.5 .mu.m) beyond a standard paper transfer amount corresponding to a quarter of the total number of nozzles in the nozzle arrangement of a recording head. This can displace dots formed in subsequent scannings from dots formed in previous scannings by amounts of 2.5 .mu.m, 5 .mu.m, 7.5 .mu.m and 10 .mu.m, and reduce the overlap of the dots at boundary regions in the decimated multipass print mode. In a one pass print mode, the paper transfer amount per scanning is set less than the sum total of the four paper transfer amounts of the decimated multipass print mode so that dot overlaps take place as countermeasures against paper transfer errors. This makes it possible to achieve high quality image recording by preventing both the white bandings at the boundary regions in the one pass print mode that prints one unit area by one scanning, and black bandings at boundary regions in the decimated multipass print mode that prints the one unit area by a plurality of scannings, thereby achieving high quality recording.

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