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5655177 |
Image former apparatus having a fixing temperature in a printer mode lower than in a copy mode
A fixing device in an image forming apparatus can set its fixing temperature to 200° C. in the copy mode, and 180° C. to 160° C. in the printer mode. When print data is externally input, a print...
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5652949 |
Preheating controller for a two-stage electrophotographic printing system
Preheating temperature of a preheating plate provided on the front side of a fixing unit can be changed using a temperature controller. In a case where a printing system to print images on both...
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5640646 |
Image forming apparatus capable of controlling heating units under optimum driving mode and a method for controlling the same
When a time mode is selected, after power to the apparatus as a whole is cut off, the time until the scheduled start of supply of power to the heating units is counted. When the scheduled time of...
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5633704 |
Image forming apparatus having fixing means error detection
An image forming apparatus includes image forming means for forming an unfixed image on a recording material; a fixing device for heat-fixing the unfixed image on the recording material, the fixing...
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5627634 |
Image fixing apparatus having a heater energized and controlled by electric energy
An image fixing apparatus includes a heater having heat generating resistors producing heat by being supplied with electrical energy; a film movable together with a recording material, wherein a...
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5627628 |
Electrophotographic apparatus
When a CPU switches the power supply to a fusing lamp to OFF from ON state while an exposing lamp stays on, the CPU suspends a feedback phase control of the exposing lamp and carries out a phase...
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5621511 |
Fixing apparatus with sheet interval adjustment and fixing interruptions
The present invention provides a fixing apparatus comprising a heat body heated by a heater and adapted to convey a recording sheet, temperature detection means for detecting a temperature of the...
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5581341 |
Temperature control device for a fusing device in an image forming apparatus
A temperature control device for a fusing device in an image forming apparatus includes a heater provided in the fusing device for heating a sheet of paper, a temperature detector for detecting the...
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5572306 |
Image forming apparatus capable of setting fixing temperature corresponding to temperature rising state of heating member
An image forming apparatus for forming an image on a recording medium, having an image bearing member; an image forming device for forming an image on the image bearing member; a transfer device...
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5563696 |
Image fixing apparatus with power control during sheet passage
An image fixing apparatus includes a heater; a detector for detecting a temperature of the heater; a controller for controlling electric power supply to the heater to provide a predetermined...
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5561512 |
Fixation control device
A fixation control device is provided which controls the operation of a fixing unit having a heat roller and a press roller between which a sheet is passed. When copies are successively made on a...
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5557385 |
Method and device for controlling thermal fixing machine
The present invention relates to a method and device each for controlling the temperature of a thermal fixing machine where a toner image is fixed on a recording medium in a printer, a facsimile...
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5555075 |
Fixation temperature control device
A fixation temperature control device is to be applied to a copying machine or the like. A control section determines a heat roller control temperature in consideration of a detected press roller...
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5555074 |
Electrophotographic apparatus and electrophotographic method
The disclosure is concerned with an electrophotographic apparatus comprising a toner image supporting member on which a toner image developed on an electrostatic latent image is formed,...
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5552874 |
Image fixing apparatus
An image fixing apparatus includes a heating member for heating an unfixed image carried on a recording material; a fixing temperature controller for providing a variable fixing temperature of the...
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5550621 |
Toner image fusing device with optimized control of cooling a pressure roller
Four cooling fans 1 to 4 are provided under a pressure roller along its axial direction in a symmetric manner. The outside cooling fans 1 and 4 are disposed so as to face the non-paper-passing...
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5546161 |
Image forming system having main power source
An image forming apparatus includes a recording sheet supplying portion for supplying a recording sheet and an image forming device for forming an image on the recording sheet supplied from the...
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5543904 |
Fixating device
A fixating device has a first rotatable member in contact with an unfixated image borne on a recording medium, a second rotatable member forming a nip together with the second rotatable member, a...
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5534987 |
Fixing apparatus with variable fixing temperature
A fixing apparatus includes a heating member; a temperature detecting member for detecting the temperature of the heating member; a power supply controller for controlling the power supply to the...
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5521676 |
Method and apparatus for controlling the temperature of a fixing device in an image forming apparatus depending on a paper feed path or method
A method for controlling fixing temperature of a fixing device capable of fixing a toner image on recording paper in an image forming apparatus. A fixing temperature of the fixing device is...
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5521686 |
Electrophotographic image forming method and apparatus wherein image fixing heater temperature is controllable
An electrophotographic image forming system wherein a visible image is generated by an image forming device in response to a print start command and is fixed on the medium by heat generated by a...
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5517284 |
Fixing device
A fixing device is provided with a heating member heated by a heater, a temperature detecting member for detecting a temperature of the heating member, a controller for controlling energization of...
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5512992 |
Apparatus and method for controlling fusing temperature
An apparatus for controlling a fusing temperature in a system using an electrophotographic developing process by sensing the thickness of the paper. An apparatus for controlling a fusing...
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5497218 |
Three point thermistor temperature set up
Thermistors are calibrated by taking three thermistor resistance measurements at various temperatures. The resistance values are converted or transferred to Analog to Digital (A/D) bits or bit...
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5493379 |
Heater having contacts for AC and DC
A heater with a base member has a resistor extended along a length of the base member and generating heat upon electric power supply thereto. Also provided is a temperature detecting element for...
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5486903 |
Image forming apparatus with paper thickness detector
The present invention has a detection device for detecting the thickness of a recording material by using an air capacitor, and an image forming device for forming an image on the recording...
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5481346 |
Image forming apparatus capable of adjusting fixing conditions
An image forming apparatus which maintains proper fixing conditions through various situations. The apparatus includes a device for forming an unfixed image on a recording material; a fixing device...
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5465141 |
Fixing apparatus for changing the duty cycle of electric current supply
A fixing apparatus having a heating member maintained at a predetermined fixing temperature and an electric supply device for supplying an electric current to the heating member, wherein the...
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5453824 |
Electro-photographic method and device with thermal fixing with reduced noise
An electro-photographic printing device has a development location where toner is transferred onto a drum in proportion to the amount of light charges on the drum and a transfer location where...
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5448339 |
Control system for heat fixing apparatus
The present invention is aimed at providing a control system for a thermal fixing apparatus having an excellent fixing ability even at an initial stage of a copying process when applied to a high...
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5444521 |
Image fixing device capable of controlling heating overshoot
An image heating device which includes a heater; a temperature detecting element to detect a temperature of the heater; and a controller for controlling power supply to the heater, so that the...
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5436430 |
Roller fuser having a temperature control
A fuser for fixing toner images to a receiving sheet includes pressure and fusing rollers which are separated during idle. In response to a run signal, the temperature of the fusing roller is given...
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5436709 |
Fixing device which controls an energizing condition of a heater after fixing operation
A fixing device which can be employed in an image forming apparatus controls energization of a heater which heats a fixing device, and a detector for detecting the condition of fixing operations...
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5428434 |
Flash-radiation type toner image fixing device
A toner image fixing device is disposed above a passageway along which a sheet of paper carrying toner images recorded thereon is moved, and has a lamp for emitting heat-radiation toward the sheet...
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5426494 |
Electrophotographic device and method for shortening a print time
In an electrophotographic device, a heat roller is heated by a heater, and upon instruction of start of a print operation, the temperature Tf of the heat roller is detected by a temperature sensor....
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5408301 |
Electrophotographic apparatus having two fixing sections and control means for controlling temperature adjustments selectively to the fixing sections
An electrophotographic apparatus is provided with a fixing device having the first through third fixing rollers for forming the first fixing section by contacting the first and second fixing...
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5376773 |
Heater having heat generating resistors
A heater apparatus includes an electrically insulative base plate and a plurality of independent resistors, extending along a length of the base plate, for producing heat upon electric energization...
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5367369 |
Image heating apparatus capable of controlling number of waves in AC power supply
An image heating apparatus including a heater which is stationary in use; a film movable together with a recording material in sliding contact with the heater, an image on the recording material...
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5365314 |
Image heating apparatus capable of changing duty ratio
An image heating apparatus includes a heater; a temperature detecting member for detecting a temperature of the heater; the controller for controlling electric power supplied to the heater so that...
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5333038 |
Image forming apparatus for controlling a size or a color tone of a toner image
In a toner image forming apparatus capable of changing the fixing condition of a fixing device to fix a toner image on a recording sheet, there is provided a control device to change at least one...
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5331384 |
Fixing apparatus having temperature controller which controls temperature according to width size and number of recording sheets
In an image forming apparatus including a fixing device for heating and fixing a toner image on a recording material, a temperature detector for detecting the temperature of the surface of a fixing...
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5321481 |
Fuser temperature and copy output controller
An electrophotographic copy machine includes a system manager which controls the operation of the copy machine based on a plurality of performance levels corresponding to fuser copy quality...
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5315350 |
Image forming apparatus provided with a controller for fixing roller heater
An image forming apparatus includes an image forming unit for forming and transferring an image of a document to a copy sheet, fixing unit including a fixing roller for fixing the document image to...
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5311268 |
Fixing device using fuzzy inference
Disclosed is a fixing device using fuzzy inference, which is used for copying machine, optical printer, or the like. The fixing device is provided with a fixing heater drive circuit 13 for...
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5309209 |
Heat-fixing apparatus for color video printer including a stationary heat tube
A heat-fixing apparatus for a color video printer. The heat-fixing apparatus comprises a heating member for heating an under surface of a receiver paper, thereby heat-fixing an image which has been...
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5307134 |
Electrophotographic apparatus
An electrophotographic apparatus for providing a thermally fixed toner image on a recording medium and wherein the fixing temperature can be selectively canceled. The apparatus is of the type...
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5306381 |
Laminating apparatus
The present invention provides a laminating apparatus comprising a sheet feeder for feeding a sheet on which an image is formed, a laminate film feeder for feeding laminate films, a heater for...
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5303015 |
Recording apparatus for conserving energy
A recording apparatus has an image forming unit for forming a visible image on a recording medium in accordance with an inputted image signal, a fixing unit for fixing the visible image on the...
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5287155 |
Temperature control method for a fixing device
A method of controlling the surface temperature of a heat roller included in a fixing device and having a heater therein by sensing it by a thermistor. The thermistor is held in contact with the...
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5281793 |
Apparatus for positioning a temperature sensing element in temperature sensing relationship with a moving object
An apparatus for positioning a temperature sensing element in temperature sensing relationship with a moving object. The apparatus includes a base and also a resilient member, attached to the base,...
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