IMAGE FORMING APPARATUS

• Main Author: TAKATSUKA RYO
• Format: Patent
• Language: English; Japanese
• Published: 18.01.2016
• Subjects: CINEMATOGRAPHY; CONVEYING; CORRECTION OF TYPOGRAPHICAL ERRORS; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HANDLING THIN OR FILAMENTARY MATERIAL; HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS,CABLES; HOLOGRAPHY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; MAGNETOGRAPHY; PACKING; PERFORMING OPERATIONS; PHOTOGRAPHY; PHYSICS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; STORING; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of preventing a waste of a sheet by executing printing under processing conditions appropriate for the sheet even when sheet re-feeding has been attempted to save the sheet by lowering the rotation speed of a motor at the time when a sheet feeding error attributed to a cause other than deterioration in durability of a roller member has occurred.SOLUTION: An image forming apparatus comprises: image forming means for forming an image on a recording medium; sheet feeding means for feeding a recording medium to the image forming means; sheet feeding operation determination means for determining the success or not success of the sheet feeding operation of a recording medium; storage means for storing the thickness information of a recording medium; medium thickness detection means for detecting the thickness of a recording medium; and control means for setting and changing image formation conditions and sheet feeding speed conditions. The control means changes the image formation conditions when a sheet feeding operation is determined to be a failure, but a sheet re-feeding operation performed by a feeding speed lower than a normal feeding speed is successful, and the thickness of a recording medium detected by the medium thickness detection means is different from the thickness information stored in the storage means. 【課題】ローラ部材の耐久劣化以外の要因による給紙エラー発生時に、モータの回転速度を下げて再度給紙を行い救済を図った場合においても、用紙に適応したプロセス条件にて印刷を実行することにより、用紙を無駄にすることを防止することが可能な画像形成装置を提供する。【解決手段】記録媒体上に画像を形成する画像形成手段と、画像形成手段に記録媒体を給紙する給紙手段と、記録媒体の給紙動作の成否を判定する給紙動作判定手段と、記録媒体の厚さ情報を記憶する記憶手段と、記録媒体の厚さを検出する媒体厚検出手段と、画像形成条件及び給紙速度条件を設定・変更する制御手段とを備え、制御手段は、給紙動作が失敗したと判定された後、通常の給紙速度よりも低速で行った再給紙動作が成功し、且つ、媒体厚検出手段によって検出された記録媒体の厚さが記憶手段に記憶された厚さ情報のものとは異なる場合、画像形成条件を変更する画像形成装置。【選択図】 図１