Analysis of Paper Motion Driven by Skew-Roll Paper Feeding System.

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  • スキューロール紙送り機構における紙の運動解析
  • スキューロール カミオクリ キコウ ニ オケル カミ ノ ウンドウ カイセキ

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A paper feeding system using friction force of rubber rolls is commonly used in the printer and copy machine family, but the accuracy of paper positioning by rubber rolls is poor so rubber rolls have difficulty feeding long lengths of paper without lateral deviation. Here we propose a dynamic skew-roll paper feeding system (SRPFS), in which a steel roll has a small skew angle against a rubber roll thereby controlling the lateral motion of the feed paper. We theoretically analyzed the motion of paper fed by this new system and discussed its characteristics. Analytical results were verified experimentally. As a result, we could clarify the following properties. (1) SRPFS only causes the lateral motion to be proportional to the skew angle between steel roll and rubber roll, and has a negligible effect on longitudinal motion. Moreover SRPFS does not induce rotary motion of the paper. (2) When the distribution of load along the contact nip is asymmetrical and the skew angle is zero, rotary motion of constant velocity is generated without any significant effect on lateral or longitudinal motion.

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