Patent application number | Description | Published |
20090257801 | IMAGE FORMING APPARATUS AND CURL STRAIGHTENING DEVICE - An image forming apparatus includes: a sheet conveyance section that conveys a sheet; an image forming section that forms an image on the sheet conveyed by the sheet conveyance section according to an image signal; a sheet heating section that heats the sheet on which the image is formed by the image forming section; and a curl straightening section that straightens curl of the sheet after the sheet is heated by the sheet heating section. The sheet heating section curls the sheet in a different direction according to a sheet thickness. The curl straightening section includes: a first curl straightening section that straightens the curl of the sheet curled in a first direction for curling thick sheet; and a second curl straightening section disposed on a downstream side in a sheet conveyance direction to straighten the curl of the sheet curled in a second direction opposite to the first direction. | 10-15-2009 |
20090257802 | CURL CORRECTION DEVICE AND IMAGE FORMNIG APPARATUS - A curl correction device that corrects curl, including: a curl correction shaft that drives to carry a sheet; a first supporting member that supports the curl correction shaft; a curl correction roll that holds the sheet between the curl correction shaft and the curl correction roll and presses the sheet against the curl correction shaft; a second supporting member that supports the curl correction roll and rotates the curl correction roll around a first end in the longitudinal direction of the curl correction roll between closed state and open state; and a cam mechanism that provides, via a cam, the curl correction shaft with driving force for pressing the curl correction roll according to a position of the cam, the cam mechanism being provided with a cam shaft, a connecting member, a first cam receiving member, and a second cam receiving member. | 10-15-2009 |
20110236037 | HEATING DEVICE AND IMAGE FORMING APPARATUS - A heating device includes a first rotating member and a second rotating member revolving in contact with the first rotating member. The second rotating member heats a passing recording medium having a toner image and held between the first and second rotating members, thereby fixing the toner image on the recording medium. The heating device further includes a pair of supporting plates supporting the first and second rotating members by being arranged on both sides across the first and second rotating members in a width direction crossing the passing direction of the recording medium. The supporting plates each have a tabular section with a first surface facing the first and second rotating members. The heating device further includes a resistance element arranged on a second surface side opposite to the first surface of the tabular section, and representing the type of a fixing device by using resistance. | 09-29-2011 |
20110236082 | FIXING DEVICE AND IMAGE FORMING APPARATUS - A fixing device includes: a first rotating member; a second rotating member that extends along the first rotating member, sandwiches a recording medium with a toner image formed thereon between the first and second rotating members, rotates together with the first rotating member, and heats the recording medium to fix the toner image on the recording medium; a heating device whose circumferential surface circularly moves while contacting an external circumferential surface of the second rotating member, and the heating device heats the second rotating member; a temperature detecting device disposed to face the external circumferential surface of the second rotating member without contacting the external circumferential surface to detect a temperature thereof; and a cleaning device cleaning the circumferential surface of the heating device and disposed between the heating device and the temperature detecting device along the surface of the second rotating member. | 09-29-2011 |
Patent application number | Description | Published |
20110318030 | FIXING APPARATUS AND FIXING METHOD - An fixing apparatus of the present invention includes: a developer image forming section that is provided to an apparatus main body and forms a developer image on a recording medium; a fixing section that is provided to the apparatus main body and fixes the developer image that has been formed on the recording medium by the developer image forming section; an identification section that is provided to the fixing section and allows a type of recording medium for being fixed by the fixing section to be identified; and a banning section that is provided to the apparatus main body, identifies the type of recording medium for being fixed by the fixing section using the identification section and bans image forming on a recording medium that has a different type from the type of recording medium for being fixed by the fixing section. | 12-29-2011 |
20110318037 | FIXING DEVICE AND IMAGE FORMING APPARATUS - There is provided a fixing device including: a heating member that, while rotating, heats and fixes a developer image onto a recording medium; a pressing member that nips and presses the recording medium between itself and the heating member; an external heating member configured to make contact with an outer surface of the heating member and to move away from the outer surface of the heating member, the external heating member making contact with the outer surface of the heating member and heating the heating member; and a moving section that computes a contact position of a leading edge of the recording medium and the outer surface of the heating member, and moves the external heating member such that the external heating member contacts the outer surface of the heating member based on the computed position. | 12-29-2011 |
20130011172 | APPLYING DEVICE, FIXING DEVICE, AND IMAGE FORMING APPARATUS - An applying device includes an applying member that applies an applying material to an outer peripheral surface of a fixing member that rotates, while a peripheral velocity difference is caused to exist between a peripheral velocity of the fixing member and a peripheral velocity of the applying member. The applying material contains a fluorocarbon resin material. | 01-10-2013 |
20130322900 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes a fixing device that is attachable to and detachable from an apparatus body and fixes a developer image onto a recording medium; a setting unit that is provided in the fixing device and in which a size of a recording medium to be used in the fixing device is set; an acquiring unit that is provided in the apparatus body and acquires size information of a recording medium onto which the developer image is to be fixed; a determining unit that compares the size of the recording medium set in the setting unit with the size of the recording medium acquired by the acquiring unit so as to determine whether or not a fixing process is performable by the fixing device; and a notifying unit that at least provides notification of a negative determination result obtained by the determining unit. | 12-05-2013 |