Abstract: There is described an image-forming apparatus for forming a toner image on a recording medium, a size of which is larger than that of the toner image being a fixed form size, based on image data corresponding to the fixed form size. The image-forming apparatus includes an image-forming section to form the toner image in a region of the fixed form size, based on the image data corresponding to the fixed form size, and to form a specific toner image in a specific region outside the fixed form size, both the region and the specific region being shared each other within a whole area of the recording medium; and a controlling section to control the image-forming section so as to form a predetermined patch image, serving as the specific toner image, in the specific region outside the fixed form size.

Abstract: A heater control apparatus is provided for controlling a plurality of heaters used for fixing operations of an image forming apparatus, wherein each of the heaters is incorporated inside one of a plurality of rollers. The heater control apparatus includes: a plurality of switching elements to switch flowing paths of electronic currents supplied to the heaters from a common power source; a switching control section to control the switching elements so that a connecting mode of the heaters is changeable between a serial connection mode and a parallel connection mode; and a plurality of temperature detecting devices to detect temperatures of the rollers heated by the heaters, each of the temperature detecting devices corresponding to each of the rollers. The switching control section controls the switching elements so as to change the connecting mode of the heaters according to temperature conditions of the rollers.

Abstract: There is described an image-forming apparatus for forming a toner image on a recording medium, a size of which is larger than that of the toner image being a fixed form size, based on image data corresponding to the fixed form size. The image-forming apparatus includes an image-forming section to form the toner image in a region of the fixed form size, based on the image data corresponding to the fixed form size, and to form a specific toner image in a specific region outside the fixed form size, both the region and the specific region being shared each other within a whole area of the recording medium; and a controlling section to control the image-forming section so as to form a predetermined patch image, serving as the specific toner image, in the specific region outside the fixed form size.

Abstract: The invention concerns a heater control apparatus for controlling a plurality of heaters used for fixing operations of image forming apparatus, in which each of the heaters is incorporated in an interior of each of rollers. The heater control apparatus includes: a plurality of switching elements to switch flowing paths of electronic currents supplied to the heaters from a common power source; a switching control section to control the switching elements so that a connecting mode of the heaters is changeable between a serial connection mode and a parallel connection mode; and a plurality of temperature detecting devices to detect temperatures of the rollers heated by the heaters, each of the temperature detecting devices corresponding to each of the rollers. The switching control section controls the switching elements so as to change the connecting mode of the heaters according to temperature conditions of the rollers.

Abstract: An image forming apparatus includes: a sheet feeding member for feeding a recording material; an image recording member for recording an image on the recording material; a conveyance path connecting the sheet feeding member and the image recording member, along which the recording material is conveyed; a registration member which is provided in the conveyance path located at the upstream side of the image recording member in the conveyance direction for the recording material, and stops the leading edge of the recording material when being hit by the leading edge, and then, starts conveyance of the recording material; a loop forming member which is provided in the conveyance path located at the upstream side of the registration member in the conveyance direction for the recording material, and forms a loop on the recording material which is stopped by the registration member; a first driving source for driving the registration member; a second driving source for driving the loop forming member; and a drive co