摘要:
An image forming apparatus includes fixing means for fixing a toner image formed on a recording material, and heating means, for heating the fixing means, comprising a carbon-based material. In order to detect and expect the life of the heating means with good accuracy, the image forming apparatus further comprises current measuring means for measuring a current passing through the heating means and notification means for providing notification of information on a life of the heating means depending on an output of the current measuring means.
摘要:
An image forming apparatus including a fixing device for fixing by heat an image formed on a recording material; a heater for heating the fixing device; a controller for controlling electric power supply to the heater, wherein the apparatus is operable in a stand-by mode in which an electric energy consumption of the heater is reduced, wherein in the stand-by mode, the controller continuously supplies the electric power to the heater.
摘要:
An image forming apparatus including fixing means for fixing by heat an image formed on a recording material; heating means for heating the fixing means; control means for controlling electric power supply to the heating means, wherein the apparatus is operable in a stand-by mode in which an electric energy consumption of the heating means is reduced, wherein in the stand-by mode, the control means continuously supply the electric power to the heating means.
摘要:
An image forming apparatus has a fixing unit for fixing a toner image formed on a recording material, and a heater, for heating the fixing unit, made of a carbon-based material. In order to detect and expect the life of the heating unit with good accuracy, the image forming apparatus further has a current measuring device for measuring a current passing through the heating unit and a notification device for providing notification of information on a life of the heating unit depending on an output of the current measuring device.
摘要:
A sheet feeding apparatus and an image forming apparatus are provided. When sheets are adsorbed to an adsorption conveyance belt, a suction shutter is switched from a block position to block a negative pressure to an adsorption position to adsorb the sheets by the negative pressure. When the sheets conveyed in an overlapping manner reaches a predetermined number and the next sheet is adsorbed, the timing to switch the suction shutter to the adsorption position is delayed compared to the timing at which a preceding sheet adsorbed in advance and a subsequent sheet overlap.
摘要:
A sheet feeding apparatus includes a back end detecting sensor which detects a back end side in a conveying direction of the topmost sheet stacked on the sheet tray, a front end detecting sensor which detects a front end side in the conveying direction of the topmost sheet, and a CPU. The CPU disables start of a sheet feeding operation of a feeding unit in a case where the back end detecting sensor and the front end detecting sensor do not detect the sheet when the sheet tray is lifted toward the feeding unit and then stopped in a predetermined position. Accordingly, a state that a feeding failure is possibly caused is detected before feeding the sheets so as to eliminate the wasteful feeding operation.
摘要:
A sheet thickness detection device capable of accurately detecting a thickness of sheets of various types. In a case that information about sheets stored in a sheet feed unit is set by a user through an operation unit or through an external host PC, a CPU of the sheet thickness detection device sets a pressure changeover solenoid to ON to obtain a strong nip pressure between a detection roller and a fixed roller, if a sheet basis weight specified in the information about sheets is larger than a predetermined value, and sets the pressure changeover solenoid to OFF to obtain a weak nip pressure, if the sheet basis weight specified in the information about sheets is equal to or less than the predetermined value.
摘要:
An image forming apparatus has a switch-back conveying portion to convey a sheet conveyed through either a first conveying path or a second conveying path as being switched-back, a mode in which a sheet passed through the first conveying path is conveyed to the second conveying path as being switched-back by the switch-back conveying portion and a mode in which a sheet passed through the second conveying path is conveyed to the first conveying path as being switched-back by the switch-back conveying portion are selectively performed.
摘要:
An image formation device changes the rotational rate of a polygon motor, i.e. the main-scanning rate, and selects one of pulse width conversion tables when an image formation is performed multiple times on a single sheet of transfer paper. The changing of the main-scanning rate is for preventing inconsistent sizes between a first recorded image and a second recorded image caused by shrinkage of transfer paper. The pulse width conversion tables allow the pulse widths to be modulated.
摘要:
An image forming apparatus generates a PWM signal corresponding to input image data and controls a timing of a light source to emit a light beam based on the PWM signal in order to perform tone reproduction. The image forming apparatus includes a data processing unit configured to generate the PWM signal for one pixel based on image data for continuous two pixels in the image data. The data processing unit selects an origin of pulse growth in generation of the PWM signal for one pixel in accordance with the image data for the two pixels to generate the PWM signal.