Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
2011-04-12
2011-04-12
Huffman, Julian D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
Reexamination Certificate
active
07922278
ABSTRACT:
The invention provides an image printing apparatus including: a printing unit that performs printing on a print target medium; a moving unit that can move in a predetermined main scan direction; an edge-detecting unit that is mounted on the moving unit and outputs, by utilizing photoelectric conversion, a voltage that changes across each edge of the print target medium; a position-detecting unit that detects the position of the moving unit; a reference stage that has one edge and another edge in such a manner that the reference stage has a predetermined reference width therebetween, the reference stage being formed in such a manner that the edge-detecting unit outputs a voltage that changes across each edge of the reference stage; and a calibrating unit that commands the moving unit to move in such a manner that the edge-detecting unit passes through each edge of the reference stage, commands the position-detecting unit to detect the position of the moving unit at a point at which a voltage outputted by the edge-detecting unit changes during the movement of the moving unit as each measured position, calculates a measured width on the basis of the measured positions, and calibrates the edge-detecting unit on the basis of the measured width and the reference width.
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Huffman Julian D
Nutter & McClennen & Fish LLP
Penny, V John J.
Seiko Epson Corporation
Sperry Christina M.
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