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AssigneeKonsihiroku Photo Industry Co., Ltd.
InventorsNoriyoshi Tarumi, Kiyoshi Kimura, Kouichi Gunji
Estimating the term…
An image reproducing apparatus comprising a driven, toner image retaining member, an intermediate transfer belt, an intermediate transfer belt supporting mechanism including a cylindrical heating roller, and a pressure roller contacting via said intermediate transfer belt in a transfer position with the outer circumferential surface of said heating roller which is in an intermediate transfer belt removing point or a point in the vicinity thereof. The intermediate transfer belt moves in accordance with said toner image retaining member to allow the toner image to be transferred thereto when said intermediate transfer belt is brought into contact with the surface of said toner image retaining member. The intermediate transfer belt supporting mechanism contacts at its outer circumferential surface the rear surface of said intermediate transfer belt. The toner image on said intermediate transfer belt is transferred to a transfer sheet material in the second-mentioned transfer position. The intermediate transfer belt is wrapping more than semi-circle of said heating roller.
An image reproducing apparatus comprising a driven toner image retaining member, an endless transfer belt moving with said toner image retaining member to allow the toner image to be transferred thereto when said transfer belt is brought into contact with the surface of said toner image retaining member, means pressing said belt into contact with said image retaining member, a belt supporting mechanism including a cylindrical roller about whose outer surface the inner surface of said transfer belt is wrapped through an angle of contact .theta., determined by the following formula:
In an image reproducing apparatus of the type in which a toner image on a rotatable image retaining member is first transferred to an endless belt at one position of the belt and then retransferred from said belt to a sheet at another position of the belt, the improvement comprising a cylindrical roller supporting said belt at said retransfer position, a pressure roller first urging said sheet against said transfer belt approximately adjacent the point where the belt departs from the outer peripheral surface of said cylindrical roller, and means heating said cylindrical roller to a temperature at which the image carrying surface of said belt is substantially equal to the softening point of the toner at the point of contact between said sheet and said belt.
Dependencies are inferred from the claim text.