Konishiroku Photo Industry Co., Ltd.

Naoki Aoki

Hiroshi Tokunaga

Shinobu Soma

Tatsufumi Kusuda

An image transfer device which transfers a charged toner carried on an image carrier onto a copying material comprises a transfer drum having a conductive base and an insulating surface, the transfer drum being arranged opposite to the image carrier. An electrical charge is applied to the copying material in advance of the copying material arriving at the insulating surface of the transfer drum. An electrical charge is also provided on the surface of the transfer drum in advance of the copying material arriving at the insulating surface of the transfer drum for attracting the copying material to the surface of the transfer drum and to maintain the attraction by the charges during a copying operation. In place of providing a specified charge on the surface of the transfer drum, a bias voltage can be applied to the conductive base of the transfer drum to provide the attraction force for improving attraction of the copying material to the surface of the transfer drum and to maintain the attraction during a copying operation.

Image transfer device

A universal paper feed cassette wherein the position of a slidable guide plate for stopping the recording paper to be loaded is detected by a detecting device, so that the size of recording paper can be detected.

Universal paper feed cassette

A universal paper feed cassette wherein the lift of a bottom plate adapted to be raised by a spring lift member provided on a paper feed base is regulated by a paper-pressure regulator slidable in the widthwise direction of the recording paper along the inner surface of the bottom plate and having a thickness varying in the widthwise direction thereof, so that an equal paper pressure can be obtained irrespective of the size of the recording paper. The thickness of the paper-pressure regulator varies in a stepped manner in the widthwise direction thereof.

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Hachioji, Japan

Naoki Aoki