Incremental printing of symbolic information – Ink jet – Controller
Patent
1996-08-29
1998-03-24
Fuller, Benjamin R.
Incremental printing of symbolic information
Ink jet
Controller
347 43, B41J 201
Patent
active
057318255
ABSTRACT:
An image recording apparatus using a plurality of recording heads that can prevent black lines from occurring at scanning boundaries of the recording heads. The total recorded ink volume at the boundaries is positively reduced so that the black lines and the overflow of ink are prevented. The apparatus includes at least a pair of a dark head for discharging relatively dark ink and a light head for discharging relatively light ink. The apparatus separates an input image signal into image signals applied to the dark and light heads using at least two tables. The two tables, one for edge nozzles of each recording head and the other for the remaining nozzles, separate the input image signal independently so that the total ink volume discharged from the edge nozzles are limited to a relatively small amount. Further, the total volume of ink discharged from the edge nozzles of the recording heads are positively reduced by performing black abstraction processing, UCR processing and black inking processing on the basis of the image signals after the separation by the tables, which image signals linearly correspond to the ink volume.
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Danzuka Toshimitsu
Fukushima Hisashi
Miura Yasushi
Suzuki Akio
Canon Kabushiki Kaisha
Fuller Benjamin R.
Hallacher Craig A.
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