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6141511 |
Fixing device for use in an image forming apparatus that has first and second heater lamps and first and second controllers
A copier having a scanner section and a fixing device. The scanner section has an exposure lamp, and the fixing device has an upper roller and a lower roller. The upper roller incorporates a main...
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6137969 |
Thermal fixing device, method of energizing a heating member in the thermal fixing device and image forming apparatus
A thermal fixing device for thermally fixing an unfixed image carried on a record medium onto the record medium, including: a thermal fixing roller including a first resistance heating material...
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6118955 |
Image forming apparatus and fixing apparatus
In a belt type fixing apparatus having a heat roller temperature sensor that detects the temperature of a heat roller that contains a heater for heating a fixing belt, and a fixing belt temperature...
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6118967 |
Toner image fixing device for preventing curling of recording medium
Curling of edges of recording paper in a toner-image fixing device is prevented. A temperature control unit controls the operation of a heater-lamp for heating a fixing roller in such a way that...
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6111230 |
Method and apparatus for supplying AC power while meeting the European flicker and harmonic requirements
An improved control method is provided that combines conventional ON-OFF control and conventional phase-angle control to reduce the AC inrush current to an electrical load, such as a tungsten...
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6101346 |
Image forming apparatus capable of high speed warm-up with low power consumption
An image forming apparatus has an image forming unit for forming an unfixed image on a recording material, an image fixing device for fixing the unfixed image on the recording material, the image...
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6101345 |
Method for gloss control in an electrographic apparatus
A method for achieving a pre-selected gloss in an electrographic image printing system, by choosing the appropriate combination of fusing speed and fusing temperature. As a result of the above, the...
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6097006 |
Fixing unit for use in image forming device
A fixing unit is used for fixing an toner image on a recording medium onto the recording medium. The fixing unit includes a heater which generates heat when supplied with an electric current. A...
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6094559 |
Fixing apparatus having cleaning mode and storage medium storing program therefor
The present invention provides a fixing apparatus with a pair of fixing members at least one of which is rotatable, a nip being formed between the fixing members and a recording material which...
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6090305 |
Heater for use in electrophotographic image fixing device
A ceramic heater for use in an electrophotographic printing process, particularly for use with a belt fuser to fix toner images, is disclosed. This heater is preferably made from a ceramic material...
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6088547 |
Automatic fuser temperature control
As print media advances through a paper path of an electrophotographic printer, the print media vibrates and a sympathetic response is induced in elements in contact with the print media. Rough...
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6088546 |
Image forming apparatus with glossiness detection
An image forming apparatus has an image forming device for forming an image on a recording material in response to an image on a document. The apparatus also has a glossiness detection device for...
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6087641 |
Fixing device with induction heating unit
A fixing device is provided, which can maintain good fixing properties, irrespective of the kind of a material on which a developer image is to be fixed and a temperature condition of a pressure...
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6088549 |
Fixing device having an externally-heated fixing roller
In a fixing device, a sheet of paper carrying an image formed with pre-fixed toner is transported to a fixing nip region in which (1) a fixing roller heated by a heating roller outside of the...
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6085059 |
Color-toner-use fixing unit and color image forming apparatus
In a color image forming apparatus provided with a toner image forming device for forming a color toner image on a transfer sheet; and a pair of cylindrical fixing rollers for nipping the transfer...
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6075228 |
Image heating device with bimetal thermoprotector
An image heating device includes a heater generating heat upon electric power supply, and a film whose one surface slidably contacts the heater, and whose other surface moves together with a...
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6072964 |
Image heating apparatus with temperature detecting means
An image heating apparatus has an endless movable member; magnetic flux generating unit for generating a magnetic flux, wherein eddy current is generated in the movable member by the magnetic flux...
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6064850 |
Image formation apparatus
An image formation apparatus includes an image fixing roller for performing thermal image fixing, which image fixing roller includes an exothermic phase transition layer capable of performing...
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6055390 |
Fixing device and method for controlling fixing temperature in a stable manner
A belt fixing device including a fixing roller, a heating roller, an endless fixing belt spanned around the fixing roller and the heating roller and a pressing roller disposed opposing the fixing...
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6040558 |
Image heating apparatus
The present invention provides an image heating apparatus comprising a heater, a film sliding, and a back-up member. The heater includes a first heat-generating member for generating heat by...
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6038412 |
Image fixing apparatus with graduated temperature control
An image fixing device is disclosed comprising a heating roll installed with a heater, a pressure roll rotatably pressing against the heating roll, and a thermistor for sensing the surface...
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6035155 |
Fixing device and image forming apparatus having such device
A fixing device and an image forming apparatus having such a device is constructed by an unfixed image forming unit to form an unfixed image onto a recording material in accordance with start of an...
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6018140 |
Image forming apparatus, control method for controlling the same and temperature control apparatus
An image forming apparatus includes a fixing unit having a heat source, a temperature detecting unit for detecting a temperature of the fixing unit, an initial operation necessity detecting unit...
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6014531 |
Electrophotographic printer and fixing unit controlling apparatus therfor
A fixing unit has a heat roller with a heater element built therein, a pressure roller disposed to oppose the heat roller and holds and advances a print medium therebetween in sandwiched relation....
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6011939 |
Sensing print media size to temperature control a multi-heating element fixing device
A fixing device control system controls multiple heating elements included in the fuser so that the duty cycle of the power applied to the multiple heating elements results in an optimal...
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6011938 |
Fixing device in image forming device
To improve the fixing ability in the fixing device, and simultaneously prevent hot offset occurring during continuous fixing process. In the interior of a cored bar of a heat roll is mounted a...
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6008829 |
Control apparatus for fixing unit having plural heaters
A heater of a fixing unit of a recording apparatus is constructed by a main heater and a sub heater. When the apparatus is in a standby mode, each heater is first turned off. When a temperature of...
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6006052 |
Fixing method and fixing device
A fixing method for fixing an unfixed toner image formed on a recording material by transporting the recording material to a contact portion between a fixing roller and a pressurizing mechanism for...
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6006051 |
Electrophotographic apparatus and image forming apparatus employed therein with controlled timing of a power supply
An electrophotographic apparatus employing a self-heat-emitting heating roller capable of causing current to flow through a heat emitting resistor at a time of turning on a power supply until a...
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6002894 |
Single-pass fusing of sheet-fed multi-layer duplex copies
A fusing station (25) of an electrographic apparatus fixes in a single pass a duplex resinous powder color image (8, 18) to a support material in sheet-form (9) as the sheet is moved over a...
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5999765 |
Image forming apparatus and method therefor
An image forming apparatus includes an image forming device that forms a required image on a paper. A paper-feeding tray is capable of advancing and retreating, and is contained in a main body of...
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5994671 |
Image heating apparatus
The present invention provides an image heating apparatus comprising a heating member having a first heating resistor and a second heating resistor, a temperature detecting element for detecting a...
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5991565 |
Fixing device
In a device for fixing a toner image, provided with a heating roller including a heater, the heating roller having a length larger than a possible largest size sheet to be fixed so that the heating...
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5991555 |
Image forming apparatus
An image forming apparatus has an image forming unit for forming an image on a recording material, a fixing device for fixing the image on the recording material, an overlap-feed detector such as a...
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5991564 |
Electrophotographic duplex printing media system
A method and system media sheet handling in an electrophotographic color desktop printer are disclosed wherein a media sheet is imaged with toner on both sides of the media sheet without smudging...
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5987274 |
Image recording apparatus and method which controls the fixing temperature
An image forming apparatus and method for controlling the temperature of a fixing device. When any key of the image forming apparatus is pressed, the temperature of the fixing device is raised from...
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5978618 |
Image forming apparatus with controlled heat sources in fixing unit
An image forming apparatus is provided with a fixing unit having at least one fixing heat roller and a plurality of heat sources with respect to the one fixing heat roller, and a control unit for...
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5966562 |
Fixing device having temperature control means
Feature is a fixing device equipped in an image forming device enabling reduction of electronic noise and preventing hot-offset and fixing disorder. The fixing device includes a rotatable fixing...
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5960233 |
Temperature control for a fixing apparatus
A timer for measuring the image formation interval, and the fixing temperature is set in response to the measured image formation interval so as to balance satisfactorily the degree of fixation,...
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5942882 |
Power control device and image forming apparatus utilizing the same
Disclosed is a power control device in which, to prevent noise generation when a load is driven by an AC power source, a reactor, the load, and a switching element are connected in series to the...
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5937230 |
Temperature detecting device for rotating members
A temperature detecting device in which a sensor is lightly pressed against a rotating member for temperature detection and kept precisely in a desired position. A swing frame having a free end at...
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5920749 |
Image forming apparatus with time delayed cooling control
An image forming apparatus which forms a toner image which is transferred onto a copy sheet includes a fixing unit having a heater for fixing the toner image onto the copy sheet at a predetermined...
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5915147 |
Image fixing device, image forming apparatus providing the image fixing device and rotor used in the image fixing device and having induction coil inside
The present invention is intended to solve a problem in that the response in the temperature detection in the rotor having the induction coil inside the durability in the rotor and a stain...
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5911094 |
Fixing device and image forming apparatuse using the same
An induction heating type fixing device for causing a toner image formed on a sheet to be fixed on the sheet. This fixing device contains a fixing roller formed of a conductive member in a...
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5906762 |
Fixing device
A fixing device for heating and fixing an unfixed image to a record member, including: a heating roller having a core roller and a layer of a resistance heating material formed on an outer or inner...
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5907743 |
Image heating apparatus with control for phase control of alternating current
An image heating apparatus has a heating member for heating an image on a recording material, a temperature detecting element for detecting the temperature of the heating member, and an electric...
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5904871 |
Image heating device
This invention relates to an image heating device comprising a heating member, a backup member for forming a nip in cooperation with the heating member, a temperature detecting element for...
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5903799 |
Image heating apparatus with energization control
An image heating apparatus has a heater for generating heat by energization, a heat member heated by the heater, a temperature detector for detecting a temperature of the heat member, and an...
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5899599 |
Fixing device and fixing method
A fixing device capable of producing fixed images of excellent quality by using a thin-layer rotating heating member and a heating element capable of rapidly and directly heating a rotating heating...
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5890032 |
Belt fusing accessory with selectable fused image gloss
A belt fusing accessory, for a reproduction apparatus, the belt fusing accessory providing selectable image gloss. The belt fusing accessory, as disclosed, includes a heated fuser roller and a...
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