Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2009-03-30
2011-10-25
Huffman, Julian (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S013000, C347S042000
Reexamination Certificate
active
08042905
ABSTRACT:
An inkjet recording apparatus has: a head having a plurality of nozzles which eject an ink onto a recording medium; a conveyance device which conveys the recording medium; a droplet ejection control device which controls ink ejection of the head; a test image forming device that forms a test image on the recording medium by causing the ink to be ejected from every n (where n is a natural number equal to 2 or higher) nozzles in an X direction perpendicular to a direction in which the recording medium is conveyed, and causing the ink to be ejected so as to form vertical lines forming n columns which shift by one nozzle in the X direction and each extend continuously in terms of a Y direction parallel to the direction in which the recording medium is conveyed; and a reading device which is provided on a conveyance path of the recording medium, reads in a test image on the recording medium and has an image reading structure covering a length corresponding to full width of the recording medium in a breadthways direction which is perpendicular to the direction in which the recording medium is conveyed, wherein in the test image, an arrangement pitch in the X direction of the vertical lines is equal to or exceeding a reading pitch in the X direction of the reading device, an arrangement pitch in the Y direction of the vertical lines is N times a reading pitch in the Y direction of the reading device (where N is a natural number), and an interval corresponding to variation in a conveyance of the recording medium is provided between the vertical lines in such a manner that a length in the Y direction of each of the vertical lines is less than the reading pitch in the Y direction of the reading device.
REFERENCES:
patent: 2007/0013732 (2007-01-01), Sakamoto et al.
patent: 2007/0040878 (2007-02-01), Ikefuji et al.
patent: 2004-9474 (2004-01-01), None
Saita Hirofumi
Shimizu Toru
Birch & Stewart Kolasch & Birch, LLP
Fuji 'Xerox Co., Ltd.
Fujifilm Corporation
Huffman Julian
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