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    • 6. 发明专利
    • ENCODING DEVICE USED FOR MOVING WEB
    • JPH11109791A
    • 1999-04-23
    • JP21291998
    • 1998-07-28
    • XEROX CORP
    • CASELLA JAMES M
    • G03G21/00G03G15/00
    • PROBLEM TO BE SOLVED: To obtain an encoding device which has enhanced accuracy and simple structure and can be produced at a low cost by providing an encoding wheel coming into contact with a part of the span of a web and an extended supporting member for supporting the span and the other part. SOLUTION: The encoding wheel 72 is provided in proximity to the inside surface of a belt 22, to operate linked with it. The wheel 72 is fixed on a shaft 74 and this shaft 74 is supported by bearing parts 76 and 78. The bearing parts 76 and 78 are fixed in a frame 70 for supporting the constituting parts of a printer, as a whole. The end on a side opposite to the wheel 72, of the shaft 74 is connected to an encoder circuit 68. Then, the belt supporting member shown by a roller 80 is provided to support the span part of the belt 22 with which the wheel 72 does not come into contact. The wheel 72 is installed so that the outer periphery 82 of the wheel 72 and the outer periphery of the roller 80 have the same plane, along a line in contact with the belt.