Patent application number | Description | Published |
20080310873 | IMAGE FORMING APPARATUS AND IMAGE PROCESSING APPARATUS - An image forming apparatus is constituted by a dark color image forming station for forming an image with such a toner of recording materials having the same hue and different lightness as has a lower lightness; a light color image forming station for forming an image with such a toner of the recording materials having the same hue and different lightness as has a higher lightness; and a control portion for effecting control so that an image to be emphasized by partly disappearing or by relatively and partly decreasing in density is formable substantially only with the toner having the higher lightness. | 12-18-2008 |
20090297201 | IMAGE HEATING APPARATUS - An image heating apparatus includes an image heating rotational member configured to heat an image on a recording material, a pressure member configured to form a nip portion with the image heating rotational member and pinch the heated recording material in the nip portion, a first external heater including a first heat generation member and configured to contact an outer surface of the image heating rotational member and heat an area of the image heating rotational member that has passed the nip portion, and a second external heater including a second heat generation member and configured to contact an outer surface of the image heating rotational member and heat an area of the image heating rotational member heated by the first external heater. In the image heating apparatus, maximum power applied to the second heat generation member is smaller than maximum power applied to the first heat generation member. | 12-03-2009 |
20100196039 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image forming device configured to form a toner image on a sheet; an image heating device disposed contacted with the toner image on the sheet and configured to heat the toner image on the sheet; a heating device configured to heat the image heating device; a detecting device configured to detect a temperature of the image heating device; a controlling device configured to control the heating device so that the temperature of the image heating device is maintained at a target temperature based on an output of the detecting device; a selecting device configured to select one of plurality of modes including a first mode in which the images are continuously formed on a plurality of thin sheets, a second mode in which the images are continuously formed on a plurality of thick sheets and a third mode in which the images are continuously formed on a plurality of sheets including the thin sheet and the thick sheet; a setting device configured to set the target temperature based on the selected mode, wherein the target temperature in the second mode is higher than the target temperature in the first mode, and the target temperature in the third mode is higher than the target temperature in the second mode. | 08-05-2010 |
20110305474 | IMAGE HEATING DEVICE AND IMAGE FORMING APPARATUS - An image heating device includes a rotatable image heating member for heating an image on a recording material; a pressing member for pressing the image heating member to form a nip in which the recording material is to be nip-conveyed; a belt member for heating the image heating member in contact with the image heating member; a first belt heating member for heating the belt member while pressing the belt against the image heating member; a second belt heating member, provided downstream of the first belt heating member with respect to a rotational direction of the image heating member, for heating the belt member while pressing the belt member against the image heating member; a first heating portion for heating the first belt heating member by energization; and a second heating portion for heating the second belt heating member by energization. Each of the first heating portion and the second heating portion is supplied with power so that a maximum of the power supplied to the first heating means is smaller than that of the power supplied to the second heating portion. | 12-15-2011 |
20110317184 | IMAGE FORMING APPARATUS - An image forming apparatus is provided which realizes an adequate operation of a paper dust removing device. The image forming apparatus has a storing portion which stores the likelihood that paper dust is produced upon previous image formation as previous paper dust production information according to the type of sheet. Further, the image forming apparatus has a CPU which adjusts paper dust removing performance upon current image formation to increase based on previous paper dust production information when the likelihood that paper dust is produced upon previous image formation is higher. Consequently, it is possible to realize an adequate paper dust removing operation of the paper dust removing device and prevent problems of images from occurring due to paper dust. | 12-29-2011 |
20120189339 | IMAGE HEATING APPARATUS - An image heating apparatus includes an image heating rotational member configured to heat an image on a recording material, a pressure member configured to form a nip portion with the image heating rotational member and pinch the heated recording material in the nip portion, a first external heater including a first heat generation member and configured to contact an outer surface of the image heating rotational member and heat an area of the image heating rotational member that has passed the nip portion, and a second external heater including a second heat generation member and configured to contact an outer surface of the image heating rotational member and heat an area of the image heating rotational member heated by the first external heater. In the image heating apparatus, maximum power applied to the second heat generation member is smaller than maximum power applied to the first heat generation member. | 07-26-2012 |
20140023389 | FIXING APPARATUS - A fixing apparatus that fixes a toner image on a sheet includes each of fans configured to respectively cool areas adjacent to a longitudinal center and longitudinal both ends of a pressure roller, and in a case where fixing processing is performed on thin paper of a maximum width size, includes a first mode in which the fixing processing is started after the fan configured to cool the area adjacent to the longitudinal center of the pressure roller is actuated for a predetermined time and a second mode in which the fixing processing is started after the fan configured to cool the area adjacent to the longitudinal both ends of the pressure roller is actuated for a predetermined time. | 01-23-2014 |
20150153691 | IMAGE HEATING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE IMAGE HEATING APPARATUS - An image heating apparatus includes: an endless belt configured to heat a toner image on a recording material at a nip; an electroconductive portion provided along a circumferential direction of the endless belt at a longitudinal end portion of the endless belt; a first contact portion and a second contact portion which contact the electroconductive portion at different positions with respect to the circumferential direction; an electric voltage supplying portion configured to supply an electric voltage to the electroconductive portion through the first contact portion; and a detecting portion configured to detect, whether or not electrical conduction is established, through the second contact portion. | 06-04-2015 |