Image recording apparatus which can prevent bleeding at a border of a region to be recorded

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United States of America Patent

PATENT NO 6234600
SERIAL NO

08547933

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Abstract

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An image recording apparatus using a plurality of recording heads that can prevent black lines from occurring at boundaries of each scanning 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, and 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 inks 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 are linearly correspond to the ink volume.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHA30-2 SHIMOMARUKO 3-CHOME OHTA-KU TOKYO 146-8501

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Danzuka, Toshimitsu Tokyo, JP 86 729
Fukushima, Hisashi Kawasaki, JP 64 1148
Miura, Yasushi Kawasaki, JP 91 1794
Suzuki, Akio Yokohama, JP 254 3301

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