Color image forming device

Abstract

PURPOSE:To prevent the occurrence of gradational irregularity and jitter at the time of forming a digital image by preventing cleaning, which is performed by making a blade press-contact with a photosensitive belt, from being performed even at the time of transferring. CONSTITUTION:The blade 13A is controlled by a cleaning control means so that it may press-contact with the photosensitive belt 1 after the trailing edge of a toner image on the belt 1 passes through the central position T of transfer by a transfer device 12 and before the leading edge of the remaining toner image after the transfer arrives at the press-contact position C of the blade 13A with the belt 1. In such a case, the blade 13A is controlled by the cleaning means so that the press-contact of the blade 13A with the belt 1 is released after the trailing edge of the remaining toner image passes through the press- contact position C of the blade 13A with the belt 1 and the blade 13A is separated from the belt 1. Besides, length LTC from the central position T of the transfer to the press-contact position C is set to be longer than that of a maximum-sized transfer paper on which the transfer is executed.

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    EP-0676674-A2October 11, 1995Konica CorporationAppareil de formation d'images en couleur
    EP-0676674-A3July 17, 1996Konishiroku Photo IndFarbbilderzeugungsgerät.
    US-5402222-AMarch 28, 1995Konica CorporationColor image forming apparatus