Patent application number | Description | Published |
20090110419 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus and method which can take a countermeasure against a tail or the like in consideration of differences of various conditions such as a kind of transfer paper and the like is provided. The apparatus has an image processing portion for extracting an image pattern whose image information has a concentration of 100% and executing a thin-out process for thinning out a predetermined area in the extracted image pattern at a predetermined ratio. The image processing portion or step changes the thin-out process according to the transfer paper kind. | 04-30-2009 |
20110100972 | IMAGE HEATING APPARATUS - An image heating apparatus includes a flexible sleeve; a heater contacted to an inner circumferential surface of the sleeve; a pressing roller for forming a nip, between itself and the sleeve contacted by the heater, in which a recording material is to be heated; and a supporting member for supporting the heater, the supporting member being disposed inside the heater and having an area in which the sleeve is sandwiched between the supporting member and the pressing roller at least on an upstream side and a downstream side of a heater supporting position of the supporting member with respect to a rotational direction of the sleeve. The supporting member is provided, at its surface in the area, with a plurality of recessed portions for permitting passage of a lubricant. The recessed portions are provided only in an area in which a predetermined maximum width sheet available in the image heating apparatus is passable. | 05-05-2011 |
20110156336 | IMAGE FORMING APPARATUS - A reversely-rotatable roller conveys a sheet having an image formed on its one side at a sheet conveying velocity faster than that of a conveying roller by normal rotation and then, the reversely-rotatable roller conveys the sheet to a re-conveying path by reverse rotation. The sheet conveying velocity of the reversely-rotatable roller when the reversely-rotatable roller reversely rotates is made slower than the sheet conveying velocity when the reversely-rotatable roller normally rotates so that the sheet conveying velocity of the re-conveying roller is substantially equal to or slower than the sheet conveying velocity of the conveying roller. | 06-30-2011 |
20110262160 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus and method which can take a countermeasure against a tail or the like in consideration of differences of various conditions such as a kind of transfer paper and the like is provided. The apparatus has an image processing portion for extracting an image pattern whose image information has a concentration of 100% and executing a thin-out process for thinning out a predetermined area in the extracted image pattern at a predetermined ratio. The image processing portion or step changes the thin-out process according to the transfer paper kind. | 10-27-2011 |
Patent application number | Description | Published |
20120141155 | IMAGE FORMING APPARATUS - A fixing rotational body is rotated immediately before shifting from a standby mode to a power saving mode in which not only power supply to a heater and the rotation of the fixing rotational body are stopped but also a timer is stopped so that the reliability of the thermistor detection temperature when returning from the power saving mode is improved, and fixing defect is prevented while power consumption in the power saving mode is reduced. | 06-07-2012 |
20140308052 | FIXING APPARATUS - In one aspect of the invention, a fixing apparatus that heats a recording material having a toner image while conveying the recording material at a nip portion to make the toner image fix onto the recording material includes a cylindrical belt having a heat generating layer that generates heat by being energized and a contact for supplying electricity to the heat generating layer. The contact is in contact with one of an outer surface and an inner surface of an end of the belt in the generatrix direction of the belt. An electrically conductive layer is provided, along the direction of rotation of the belt, on a surface of the heat generating layer opposite to a surface of the heat generating layer at which the contact is present. | 10-16-2014 |
20150086250 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image bearing member; a transfer unit for transferring a toner image from the image bearing member onto the recording material; a fixing unit for fixing the toner image on the recording material; an electroconductive member contactable to the recording material; a resistance element connected with the electroconductive member; and a capacitor element connected with the electroconductive member, wherein the electroconductive member is disposed so as to be nipped simultaneously by the transfer nip and the fixing nip and so as to be contacted by the recording material, and the electroconductive member and the capacitor element are connected in parallel between the electroconductive member and a ground potential. | 03-26-2015 |
20150086253 | FIXING DEVICE - The fixing device includes a rotary member for contacting the unfixed toner image, a pressure member for forming the nip portion by contacting the rotary member, and a cover for covering the rotary member with a space between the rotary member and the cover, wherein in a cross section of the fixing device, the cross section being orthogonal to a generatrix direction of the rotary member, wherein a shortest distance (H) between the nip portion and a farthest surface portion of the rotary member farthest away from a surface portion forming the nip portion of the rotary member, a maximum width (W) of the rotary member in the conveyance direction of the recording member, and an area (S) of the space in a range of the maximum width W in the cross section satisfy with a relationship of S/W≧0.7×H. | 03-26-2015 |