| Patent application number | Description | Published |
|---|
| 20100150597 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - A center coil and side coils alternately operate at least once while a heat belt passes positions corresponding to the center coil and the side coils. A controller controls the operation time of the center coil and the operation time of the side coils according to comparison of detected temperature of a first temperature sensor and detected temperature of a second temperature sensor. | 06-17-2010 |
| 20100150625 | IMAGE FORMING APPARATUS AND FIXING APPARATUS - According to an embodiment of the invention, a fixing apparatus includes, a first endless body configured to be heated by a heating mechanism and maintain temperature reached by the heating, a second endless body configured to fix a visualizing agent supported by a sheet medium on the sheet medium in cooperation with the first endless body, a heat equalizing member configured to be located in a predetermined position on an inner side of the first endless body and apply, to the first endless body, tension for supplying heat, and a heat accumulating member configured to have a large heat capacity compared with a heat capacity of the heat equalizing member and to be located in a predetermined position on the inner side of the first endless body and apply, to the first endless body, tension for supplying heat. | 06-17-2010 |
| 20100166471 | IMAGE FORMING APPARATUS AND FIXING DEVICE - According to an embodiment of the invention, a fixing apparatus including, a first rotating member, a second rotating member which presses a sheet between the first rotating member and the second rotating member with a first pressure to fix a visualizing agent to the sheet, a separation member which separates the sheet from the first rotating member, a pressure control unit which lowers the pressure between the first rotating member and the second rotating member to a second pressure that is lower than the first pressure, and a heating mechanism which does not heat the first rotating member in a first state where the first rotating member does not rotate and the pressure between the first rotating member and the second rotating member is the second pressure, and heats the first rotating member after the first state when the a second state is set in. | 07-01-2010 |
| 20100260525 | FIXING DEVICE AND IMAGE FORMING APPARATUS - Plural main cores and plural sub-cores are arranged spaced apart from each other along a direction orthogonal to a rotating direction of a heat belt. The plural main cores are opposed to a first area where a sheet having first width in the heat belt passes. The plural sub-cores are opposed to second areas that are areas excluding the first area in an area where the sheet having second width larger than the first width in the heat belt passes. The plural sub-cores have thickness in the direction orthogonal to the rotating direction of the heat belt smaller than the thickness of the plural main cores. | 10-14-2010 |
| 20100310266 | FUSER FOR IMAGE FORMING APPARATUS AND HEATING CONTROL METHOD - Certain embodiments provide a fuser including: a heat roller; a press roller; a coil; an inverter; a driver; a mechanism configured to change a clearance of a gap between a coil and an outer circumferential surface of the heat roller; and a controller. The controller sends information indicating a first power level to the driver. The mechanism changes the clearance to a first distance. The controller sends information indicating a second power level larger than the first power level to the driver. The mechanism changes the clearance to a second distance larger than the first distance. | 12-09-2010 |
| 20100322654 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a rotational member configured to rotate; a press member configured to press a recording medium at a nip between the rotational member; an induction-current generator configured to generate induction current in the rotational member; and a controller configured to increase rotating speed of the rotational member after a trailing end of a preceding recording medium passes through the nip until a leading end of a following recording medium reaches the nip. | 12-23-2010 |
| 20100322655 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a belt member; plural rotational members configured to support the belt member; a press member configured to form a nip between the press member and the belt member; an induction-current generator configured to generate induction current in the belt member; and a controller configured to increase the induction current while a recording medium passes through the nip. | 12-23-2010 |
| 20100322658 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a rotational member configured to rotate; a press member configured to form a nip between the press member and the rotational member; an induction-current generator configured to generate an induction current in the rotational member; and a controller configured to reduce a nip temperature of the nip when a leading end of a recording medium reaches the nip to be lower than a nip temperature when an image on the recording medium is fixed. | 12-23-2010 |
| 20100322681 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a rotational member configured to rotate; a press member configured to press the rotational member; an induction-current generator configured to generate induction current in the rotational member; and a separator configured to separate a leading end of a recording medium that passes through a nip from the rotational member, when a distal end is in a separating position, and move to an open position. | 12-23-2010 |
| 20100322684 | FUSER FOR IMAGE FORMING APPARATUS - A fuser includes: a rotational member configured to rotate; a press member configured to press a recording medium at a nip between the rotational member; an induction-current generator configured to generate induction current in the rotational member; a heat insulator partially transparent to an infrared ray; an insulator driver configured to move the heat insulator to cover the press member; and a thermometer configured to receive the infrared ray emitted from the press member. | 12-23-2010 |
| 20110135358 | FIXING DEVICE COMPRISING AUXILIARY HEAT GENERATING MEMBER AND MAINTAINING GAP RELATIVE TO SEPARATOR - A fixing device includes a fixing belt comprising a first metal heat generating layer; a pressure section facing an outer periphery of the fixing belt; an induction current generating coil situated near a peripheral surface of the fixing belt; a nip forming member situated inside the fixing belt and applying pressure to the fixing belt toward the pressure section; and an auxiliary heat generating member situated inside the fixing belt, comprising a second metal heat generating layer, extending to a position facing the induction current generating coil, and comprising a projecting portion contacting the fixing belt. | 06-09-2011 |
| 20110135359 | FIXING DEVICE INCLUDING AUXILIARY HEAT GENERATING MEMBER COMPRISING REGION WIDER THAN HEAT GENERATION REGION - According to one embodiment, a fixing device includes: a fixing belt comprising a first metal heat generating layer; a pressing unit opposing to the outer circumference of the fixing belt; an induction-current generating coil presented near the circumferential surface of the fixing belt; a nip forming member present on the inner side of the fixing belt and configured to press the fixing belt against the pressing unit; and an auxiliary heat generating member present in a heating region by the induction-current generating coil on the inner side of the fixing belt, having a second metal heat generating layer, and extending to the outer side of the heating region by the induction-current generating coil. | 06-09-2011 |
