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Sheet finishing apparatus

  • US 7,364,149 B2
  • Filed: 03/22/2005
  • Issued: 04/29/2008
  • Est. Priority Date: 03/22/2005
  • Status: Expired due to Fees
First Claim
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1. A sheet finishing apparatus, comprising:

  • a conveying path in which a sheet of paper ejected from an image forming device is carried from a receiving port, and a pair of pinch rollers pressed against each other so as to make contact closely with each other and convey the sheet of paper for post process;

    a sheet guidance member that supports one of the pair of pinch rollers, and is turnable between a first position where one of the pinch rollers and the other pinch roller contact with each other and a second position where the one of the pinch rollers is released from the other pinch roller;

    a tray used for loading the sheet of paper conveyed by the pair of pinch rollers; and

    an assist arm mounted in the sheet guidance member in a rotatable manner that makes contact with the sheet of paper being conveyed,wherein the assist arm rotates in correspondence with movement of the pinch rollers, in a manner that, in a state where the tray is closed, the assist arm rotates in a direction in which one end thereof presses the sheet of paper, and in a state where the tray is open, the assist arm rotates in an opposite direction; and

    whereinthe assist arm has an arm extending from one end side, a holder that holds a rotation center axis of the pinch rollers in a rotatable manner on the other end, and a fulcrum provided at a position distant from the holder, wherein the fulcrum can be attached to the sheet guidance member and the assist arm can be rotated centering on the fulcrum.

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