Abstract: A color printer has four photoconductive drums and image forming sections provided corresponding to the drums, for forming images on the drums, respectively. A conveyor belt device has an endless belt which is stretched between a driving roller and a driven roller so as to convey a paper sheet in sequence to the drums. A regulation plate is arranged opposite to one end face of the driving roller, and slides in contact with one side edge of the conveyor belt. If a thickness of the conveyor belt is t (mm), a width of the conveyor belt in the axial direction of the driving roller is Bw (mm), a vertical elasticity coefficient in a width direction of the conveyor belt is E (g/mm.sup.2), a load applied to the conveyor belt to stretch the conveyor belt is W (g/mm), and a diameter of the driving roller is D (mm), a distance L (mm) between the regulation member and the one end face of the driving roller is set so as to satisfy a following relationship:L<(42.3.times.D.times.E.times.t.times.10.sup.-3)/(W.times.Bw).

Abstract: An image forming apparatus includes an image former for forming an image on an image carrier, a conveyor belt for conveying an image receiving medium to the image carrier, a conveyor roller structure having a first roller with different diameter at both ends and taper size T expressed by T=(D-d)/L, wherein D is the diameter at the large diameter side, d is the diameter at the small diameter side and L is the length of the first roller, which is more than 2.341.times.10.sup.-3 and a coefficient of static friction is less than 0.26. A second roller is provided opposite to the first roller, for moving the conveyor belt in a prescribed direction by rotating the first and the second rollers in a state where the conveyor belt is put over the first and the second rollers, and a transferring structure for transferring the image formed on the image carrier onto the image receiving medium.

Abstract: An image forming apparatus includes a plurality of image carriers on each of which an image is formed, a conveyor belt for carrying an image receiving medium, a driving roller on which the conveyor belt is mounted for driving the conveyor belt to convey the image receiving medium and a pressing roller for pressing the conveyor belt against the driving roller. The images formed on the image carriers are transferred seguentially to the image receiving medium conveyed by the conveyor belt. A tensioning member causes the conveyor belt to skid to maintain proper relative positioning of the components.

Abstract: A display and input device (22) is used in a combination equipment incorporating, for example, a copier (120), a facsimile (130), a printer (140) or a scanner (150) having independent operational functions. This display and input device comprised of a transparent touch panel having flat display is designed so that the picture image information is displayed step by step by the display unit. When the combination apparatus is operated and the picture image operations are executed, the required information for such operations is displayed step by step, permitting the simple checking of input information and correct execution of the desired operation.

Abstract: An image forming apparatus comprises a control main body, and reading and recording main bodies detachable to the control main body. The reading main body includes a first memory for storing a read image data memory of original. The recording main body includes a second memory for storing the read image data. The control main body includes a data transmitting circuit for transmitting the image data stored in the first memory to the second memory when the reading and recording main bodies are mounted on the control main body. The recording and reading main body does not only operate alone but also in a state combined with the control main body.

Abstract: A display and input device (22) is used in a combination equipment incorporating, for example, a copier (120), a facsimile (130), a printer (140) or a scanner (150) having a independent operational functions. This display and input device comprised of a transparent touch panel having flat display is designed so that the picture image information is displayed step by step by the display unit. When the combination apparatus is operated and the picture image operations are executed, the required information for such operations is displayed step by step, permitting the simple checking of input information and correct execution of the desired operation.

Abstract: This invention is a display and input device, which is used in combined equipment incorporating a number of equipment (for example, a copier, a facsimile machine, a printer or a scanner) having independent operational functions. This display and input device comprises a transparent touch panel having a flat display and is designed so that the picture image information is displayed step by step by the display unit. When a device which incorporates a number of types of equipment having independent operational functions is operated and the picture image information is executed, the display unit changes to display a number of display modes in a certain operating mode according to the input operation for this input unit.

Abstract: To reduce the areas of a display panel and an input panel of a copying machine, for instance, the two panels are combined at the same place. The combination panel comprises a liquid crystal display panel for displaying various data thereon in response to a display signal indicative of x- and y-coordinates, and a transparent electrode-matrix touch panel superposed upon the display panel to enter operation data related to the displayed data when a user touches the surface thereof at the position under which the data is being displayed to generate an operation signal indicated by the same x- and y-coordinates. A Fresnel lens is placed on the display unit or under the touch panel to deflect light toward the user. Further, a sensor is disposed in the touch panel so that when an original is sandwiched between the two panels, the touch panel is usable to determine any desired rectangular image area to be trimmed or masked, while shifting the display area to the side thereof.