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| Number | Title | Issue Date |
| 8165482 | Image forming apparatus with failure detection and control method therefor An image forming apparatus that enables to continue an operation so that electric power consumption does not exceed a power supply capacity even if an electric current sensor breaks down. A temperature detection unit detects a temperature of a fixing unit that fixes... | 04/24/2012 |
| 8155541 | Fixing device which detects anomaly of heater A fixing device shifts to the anomaly detection mode in arbitrary timing except during printing. In the anomaly detection mode, a first heat generation member and a second heat generation member are off and only a third heat generation member is turned on for a pred... | 04/10/2012 |
| 8139964 | Fixing device, control method for a fixing device and image forming apparatus Provided is a fixing device including: a heater; a heating body that is heated by the heater and is caused to rotate; a pressure body that is in contact with the heating body, and is caused to rotate; a plurality of temperature sensor units each including a temperat... | 03/20/2012 |
| 8139963 | Image fixing apparatus with safety relay and control thereof An image fixing apparatus has an integration circuit which is provided in a signal path from a comparison circuit to a relay drive circuit and integrates a signal input to the integration circuit, wherein an integral value of the signal input to said integration cir... | 03/20/2012 |
| 8135292 | Fixing device and image forming apparatus having the same A fixing device includes a pressing member, a belt member which rotates in contact with the pressing member and forms a nip with the pressing member, a first roller member and a second roller member to guide a rotation of the belt member, and a heating member which ... | 03/13/2012 |
| 8131169 | Apparatus and method for mounting an RF monitoring device onto a fuser roll A replaceable unit monitor assembly includes a substrate member, multiple thermal insulating stand-off members, and a monitor device mounted on the substrate member. The stand-off members mount the substrate member to an end hub of a fuser roll of a printing machine... | 03/06/2012 |
| 8095023 | Image forming apparatus An image forming apparatus having a heating roller and a pressing roller includes a temperature sensing unit provided to be broken when the heating roller is overheated and a pressure releasing control unit provided to release the pressing roller from the heating ro... | 01/10/2012 |
| 8086119 | Fixing device and image forming device A fixing device includes a heating rotating body that is heated by a heater and rotates, a pressurizing rotating body that is in contact with a surface portion of the heating rotating body and rotates, and that forms a fixing portion, a pressing mechanism that press... | 12/27/2011 |
| 8068749 | Fixing apparatus and image forming apparatus provided with fixing apparatus A fixing apparatus according to one embodiment of the present invention includes a rotating hot roller, a rotating pressure roller, a heating belt that contacts the hot roller and conducts heat, a first support roller and a second support roller that are heated by a... | 11/29/2011 |
| 8064785 | Fixing device, image forming apparatus, and method of detecting an abnormality of a fixing device A fixing device according to this invention includes a heating roller, a heater driver, a thermistor, and a CPU. The heating roller has a heater and heats a recording sheet. The heater driver drives the heater. The thermistor detects a surface temperature of the hea... | 11/22/2011 |
| 8050577 | Image forming apparatus and abnormal temperature determination controlling method An image forming apparatus and a controlling method thereof. The image forming apparatus includes a fixing member having a heating source to heat a developer of a recording medium, a power supply unit to the heating source, first and second temperature sensors for r... | 11/01/2011 |
| 8041236 | Fixing unit controlling apparatus and image forming apparatus including the same A fixing unit controlling apparatus that includes a switching unit of a power supplier to supply power to a fixing unit according to a power supply controlling signal to control a temperature of the fixing unit, and a switching unit of a power shutter to shut off po... | 10/18/2011 |
| 8041237 | Fixing apparatus with pressure state detection and control In one embodiment, a fixing apparatus is configured of a pressing portion for causing the pressure roller to enter a pressure applied state by applying bias, a switching portion for causing the pressing portion in the pressure applied state to enter a pressure relea... | 10/18/2011 |
| 8036545 | Image forming apparatus, method of controlling fixing device, and device and method for detecting abnormality of the fixing device An image forming apparatus which is capable of detecting occurrence of an abnormality that a fixing member which is actually in an unpressurized state is detected to be in a pressurized state, and supply of electric power to a heating member is continued. A fixing d... | 10/11/2011 |
| 8027599 | Image forming apparatus An image forming apparatus includes an overheat prevention device to control a heater based on a fusing temperature detected by a temperature sensor within a predetermined range when a controller generates an abnormal heater control signal. ... | 09/27/2011 |
| 8027601 | Fixing device usable with an image forming apparatus An image forming apparatus includes a fixing roller to fix a toner on a recording medium; a heater to heat the fixing roller; an alternating current (AC) power source to generate an AC electric power such that the heater heats the fixing roller according to the AC e... | 09/27/2011 |
| 8027600 | Apparatus for image formation An apparatus for image formation comprises a fixing member, a pressing member, a heating member, a sensor, and a controller. The heating member heats at least one of the fixing and pressing members during a heating operation. The sensor senses the surface temperatur... | 09/27/2011 |
| 8023841 | Fixing controller and image forming apparatus A fixing controller capable of rapidly detecting an excessive temperature rise, even if an abnormal temperature rise takes place in a state that a rotor of a fixing unit, such as a thin-walled roller or belt, stops rotating. A rotating belt is heated by a coil, a be... | 09/20/2011 |
| 8009998 | Fixing device A fixing device including a heating element and a pressure element, for fixing a developer image transferred onto a recording sheet is provided. The pressure element is configured to be positioned selectively in two or more pressing positions defined relative to the... | 08/30/2011 |
| 8000618 | Image formation device and image formation method An image formation device, which can properly execute an image formation process even if at least any one of plural fixing units included in the image formation device cannot be used due to a breakdown or the like, is provided. In the image formation device, if a fi... | 08/16/2011 |
| 8000619 | Fixing device usable with an image forming apparatus A fixing device usable with an image forming apparatus having a fixing roller to fix a toner on a recording medium, a heater to heat the fixing roller, and an alternating current (AC) power source to supply an AC electric power to the heater may include a power conv... | 08/16/2011 |
| 7995936 | Optical measurement system and method for determining wear level of printer components Optical measurement system and method for determining a wear level of printer components such as fuser rolls. Papers can be treated with optical brighteners, which act as distinct tag/trace molecules with fluorescent properties. A fluorescence pattern on the fuser r... | 08/09/2011 |
| 7885557 | Thermistor isolation technique for a ceramic fuser heater An electrically isolated temperature sensor for use with a printer, copier, or all-in-one fuser. The fuser includes an AC driven heater to which a thermistor is mounted for sensing the temperature of the fuser heater. A resistance of the thermistor controls the peri... | 02/08/2011 |
| 7881625 | Fixing device with non-contact temperature sensor and contact temperature sensor A fixing device of the invention detects a temperature of plural positions of a heat roller by a multiple non-contact temperature sensor at the same time and controls the temperature of plural heat source members. The non-contact temperature sensor and a contact tem... | 02/01/2011 |
| 7873288 | System and method for detecting a fire in a fixer unit of a printer or copier In a fixer unit system and method to detect a fire in a fixer unit of an electrographic image generation device, at least one portion of a fixer region of the fixing unit is monitored with a photoelectric sensor arranged adjacent to a substrate material having a ton... | 01/18/2011 |
| 7860414 | Heating apparatus and fixing apparatus A heating apparatus includes: an exciting coil provided in close vicinity of a heated body having a conductive layer; a capacitor connected serially or in parallel with the exciting coil; a switching element that generates a high frequency current by turning on/off ... | 12/28/2010 |
| 7856187 | Image forming apparatus An image forming apparatus is provided, which includes: an image forming unit; a fixing unit having a heating part; a rotary drive unit; a driving force transmission unit including a displacement part displaceable to a transmitting position where rotation of the rot... | 12/21/2010 |
| 7809292 | Image forming apparatus, method, and computer program product, detecting temperature of a fixing unit A temperature detecting unit detects temperature of a fixing unit, and a control unit monitors temperatures detected by the temperature detecting unit. The control unit determines that the temperature detecting unit is abnormal when a first difference in temperature... | 10/05/2010 |
| 7778557 | Fixing apparatus and image forming apparatus In a fixing apparatus that has a heating roller, and heats a sheet where an image by a developer has been transferred, to thereby fix the image on the sheet, the following are provided: a first sensor that detects the radiant heat from the heating roller; a second s... | 08/17/2010 |
| 7773893 | Image forming apparatus A printer is provided that is capable of accurately detecting whether a recording medium is remaining even where a temperature changes rapidly. The printer has a fusing unit rotating to fuse a developer attached to a recording medium P onto the recording medium P wi... | 08/10/2010 |
| 7761016 | Overheating control and method in an image forming apparatus An image forming apparatus to prevent overheating of a fuser. In the image forming apparatus, a first overheating prevention unit compares the voltage detected by a temperature sensor, which senses temperature of the fuser, with a reference voltage and turns off the... | 07/20/2010 |
| 7742711 | Fixing device usable with an image forming apparatus A fixing device usable with an image forming apparatus having a fixing roller to fix a toner on a recording medium, a heater to heat the fixing roller, and a power supplier to supply an electric power to the heater includes a relay interposed between the power suppl... | 06/22/2010 |
| 7693435 | Fixing device and image forming apparatus A fixing device has a heating roller with a heat source therein. A power supply operates the heat source for heating a transfer material and fixing a toner image thereon. A pressure roller is spaced from the heating roller and a facing member faces the heating rolle... | 04/06/2010 |
| 7684716 | Image forming apparatus with magnetic flux detection An image heating apparatus includes a coil for generating a magnetic flux; an endless belt having an electroconductive layer for generating heat by the magnetic flux of the coil wherein a recording material carrying image is heated by heat of the belt; a magnetic fl... | 03/23/2010 |
| 7650090 | Image forming apparatus having fusion control circuit that operates even in the presence of a short circuit An image forming apparatus containing a fusing device, a commercial power source providing power to the fusing device, a triac, a thermistor detecting a temperature of the fusing device, a fusion control unit controlling the fusing device based on a detection result... | 01/19/2010 |
| 7650091 | Image forming apparatus An image forming apparatus has a heat member configured so that a longitudinal center becomes a conveyance center of the recording material, the apparatus also having a central portion temperature detection part for detecting a temperature of the heat member corresp... | 01/19/2010 |
| 7609985 | Fixing apparatus having determinatiion of cleaning member smearing and image forming apparatus A fixing apparatus is provided with a fixing roller that fixes a toner image that has been transferred onto a paper, a cleaning member that cleans a circumferential surface of the fixing roller using a metal roller that is idly rotated by contacting the circumferent... | 10/27/2009 |
| 7609984 | Fixing device The fixing device includes a pair of rotating bodies which conveys a recording medium between a nip; a heating unit which heats at least one of the rotating bodies; and a temperature detection unit which detects a temperature of at least one of the rotating bodies. ... | 10/27/2009 |
| 7587147 | Fixing apparatus and image forming apparatus with temperature control A fixing apparatus includes a heating roller having a heating unit and a press roller that is in contact with the heating roller. The fixing apparatus fixes an image of developer onto a sheet holding the image by heating and supporting the sheet. The fixing apparatu... | 09/08/2009 |
| 7574151 | Smoke detecting device, flash fusing device, image forming device and smoke detecting method A smoke detecting device including: a light-emitting portion that emits light; a light-receiving portion that receives scattered light resulting from the light which the light-emitting portion emits being scattered by smoke generated from a recording medium on which... | 08/11/2009 |
