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Roller for belt transporting apparatus and image forming apparatus

  • US 5,784,676 A
  • Filed: 04/15/1996
  • Issued: 07/21/1998
  • Est. Priority Date: 04/14/1995
  • Status: Expired due to Term
First Claim
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1. An image forming apparatus comprising:

  • an endless transfer belt; and

    a plurality of rollers for supporting and transporting said transfer belt;

    at least one of said plurality of rollers including;

    a guide member being disposed at one or both ends for guiding said transfer belt while allowing a predetermined amount of motion in an edge direction of said transfer belt; and

    means for sensing an abnormal move of said transfer belt in a direction perpendicular to a forwarding direction thereof to prevent damage to edges of said transfer belt, wherein when said means for sensing an abnormal move of said transfer belt in the direction perpendicular to the forwarding direction of said transfer belt senses an abnormal move of said transfer belt in the direction perpendicular to the forwarding direction of said transfer belt a predetermined number of times, regardless of whether power of the system has been turned off and then on, said transfer belt is stopped.

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