Image forming apparatus



【課題】装置コストを低減しつつ、用紙搬送ローラの軸方向の振動による印刷画像の劣化を防止する。 【解決手段】用紙の単位量の搬送毎に用紙端部位置を検出し、その検出結果に基づいて、用紙搬送ローラの回転に同期して、印刷画像劣化の原因となる用紙位置のズレが発生する回転位置を判定する。印刷時には、用紙搬送ローラが前記回転位置に達したとき(S22)、ズレを補正するよう印刷データをシフトする(S23)。 【選択図】図5
PROBLEM TO BE SOLVED: To prevent degradation of a print image due to vibration of a sheet conveyance roller in the axial direction while reducing the cost of an image forming apparatus. SOLUTION: Sheet end position is detected every time when a unit amount of sheets is conveyed and, based on the detection results, a rotating position where deviation of causing print image degradation occurs in sheet position is judged in synchronism with rotation of a sheet conveyance roller. When the sheet conveyance roller reaches the rotating position (S22) during print operation, print data is shifted to correct the deviation (S23). COPYRIGHT: (C)2007,JPO&INPIT




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