| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of reducing the likelihood that a boundary between transfer material regions is erroneously detected when image formation is newly carried out by using an unused portion of a partially used transfer material region.SOLUTION: An image forming apparatus transfers a transfer material to each transfer material region while conveying a band-shaped transfer medium 4 on which a plurality of transfer material regions (Y, M, C, OP) of a first size each corresponding to a plurality of transfer materials are repeatedly disposed longitudinally in a predetermined order, to thereby form on a recording medium an image of the first size or a second size which is half or less the first size. When an image of the second size is newly formed by using unused portions of the transfer material regions already used for image formation of the second size, the image forming apparatus conveys the transfer medium in a forward direction until an unused portion of the next transfer material region adjacent to the used portion of one transfer material region comes to a detection position, and then conveys the transfer medium in a reverse direction, so as to detect the boundary between the used portion and the unused portion from the unused portion side. |
