| 主权项 |
1. An image forming apparatus comprising:
a paper feed part supplying paper used for printing; a conveying path conveying the paper supplied from the paper feed part; a transfer part transferring an image onto the paper; a conveyance roller pair provided on the conveying path downstream of the paper feed part in a paper conveyance direction; a registration roller provided on the conveying path upstream of the transfer part and downstream of the conveyance roller pair in the paper conveyance direction, the registration roller temporarily stopping paper on a leading end side thereof so that the paper bends while continuing to be conveyed at a back end side thereof, the registration roller timely delivering the paper to the transfer part in a manner such that the transfer of the image onto the paper is performed without any image displacement from a transfer start position on the paper; a paper detector provided upstream of the registration roller in the paper conveyance direction, the paper detector detecting arrival of the paper at the registration roller; an image forming part forming on an image carrier the image to be transferred onto the paper at the transfer part, the image forming part starting image formation before the detection of paper arrival by the paper detector; an image processing part transmitting to the image forming part image data used for the image formation; a control part, the control part controlling operation of the apparatus to control the printing, recognizing, based on output of the paper detector, that the paper has arrived at the paper detector and the registration roller, controlling transfer of the image onto the paper, stopping image formation at the image forming part and image data transmission at the image processing part, when, at a check time point before a tip of the image arrives at a position in the transfer part where a toner image is transferred onto the paper after the start of the image formation, paper arrival at the paper detector and the registration roller has not been detected, based on the output of the paper detector, and, restarting image formation at the image forming part and image data transmission at the image processing part without disposing of the formed image after the detection of paper arrival by the paper detector, and an input part connected to the part and making printing settings, wherein the input part, before the printing, input of selection of whether or not to accept stopping of image formation and image data transmission, and wherein the control part, only when stopping of image formation and image data transmission has been accepted, performs control of stopping image formation and image data transmission. |
