Patent application number | Description | Published |
20080219695 | OZONE REMOVAL DEVICE, IMAGE FORMING APPARATUS HAVING THE SAME, AND METHOD FOR REMOVING OZONE - A color laser printer is provided with a first exhaust duct for exhausting ozone generated by a charging unit etc. inside a housing to the outside of the housing. The first exhaust duct is therein provided with a catalytic honeycomb filter for ozone gas treatment and an ion emitting unit for emitting negative ions into an atmosphere. Most of an ozone gas component is decomposed and/or absorbed by the catalytic honeycomb filter for ozone gas treatment. Furthermore, the residual ozone gas component is decomposed by the negative ions generated by the ion emitting unit. This arrangement makes it possible to provide a new ozone removal device which is different from an ozone decomposing filter or a heat source. | 09-11-2008 |
20080317503 | Electric charging device, image forming apparatus, electric charging method, and manufacturing method of electric charging device - A needle electrode having a pointed section is provided so as to face a charge-target object, and a voltage to be applied to the needle electrode is set so that 2≦(E | 12-25-2008 |
20090039244 | ION GENERATING DEVICE, METHOD FOR PRODUCING ION GENERATING DEVICE, CHARGING DEVICE, AND IMAGE FORMING APPARATUS - A surface of a discharge electrode of an ion generating device of the present invention, other than a surface in contact with a dielectric body, is coated with a protective layer made of a metal that is gold or a combination of gold and nickel. This allows the ion generating device to generate ions evenly and stably, and to have a longer life. | 02-12-2009 |
20090092422 | FIXING APPARATUS AND IMAGE FORMING APPARATUS HAVING SAME - A fixing apparatus includes a pair of fixing members composed of a fixing roller and a pressure roller that make pressure-contact with each other; an external heating belt for heating a surface of the fixing roller externally; and first and second external heating rollers having a heat source, for allowing the external heating belt to be suspended in a tensioned state. A sum of stiffnesses of the first and second external heating rollers is greater than or equal to a stiffness of the fixing roller. | 04-09-2009 |
20090169231 | FIXING APPARATUS AND IMAGE FORMING APPARATUS - A fixing apparatus of the present invention includes a heating element which has an NTC characteristic in which an electric resistance value decreases as a temperature increases, which extends (i) in a direction parallel to a recording paper and (ii) in a width direction perpendicular to a carrying direction of the recording paper, and which has a longer length, in the width direction, than a width of the recording paper. The fixing apparatus further includes electrode sections provided in close proximity to both ends of the heating element in the width direction (on areas where the recording paper does not pass), the electrode sections being connected to the heating element, so that a current flows in the heating element in a direction substantially perpendicular to the carrying direction of the recording paper. This makes it possible to restrain excessive increase in temperature at the both ends of the heating element and to obtain a uniform temperature distribution. As a result, it is possible to improve endurances of members provided in the areas where the recording paper does not pass and to obtain a uniform and high-quality fixed image on a wide-width recording paper that is processed immediately after processing of narrow-width recording papers at high throughput. | 07-02-2009 |
20090197030 | FIXING BELT, METHOD FOR MANUFACTURING FIXING BELT, AND FIXING DEVICE - A method of the present invention for manufacturing a fixing belt has the step of covering an outer circumferential surface of a hollow cylindrical mold with a fluorocarbon resin tube that is to be a releasing layer, prepares a hollow cylindrical product by forming an elastic layer and a base material layer in this order on the releasing layer, and then turns over the hollow cylindrical product. Such a method for manufacturing a fixing belt makes it possible to obtain a fixing belt of the present invention in which a releasing layer serving as an outermost layer is constituted by a fluorocarbon resin tube having a heat shrinkage ratio of not more than 5%. This makes it possible to provide: a fixing belt that is more inexpensive than before while having a releasing layer constituted by a highly durable fluorocarbon resin tube; and a fixing device including the same. | 08-06-2009 |
20090245900 | FIXING APPARATUS AND IMAGE FORMING APPARATUS INCLUDING THE SAME - A planar heat-generating body | 10-01-2009 |
20100003413 | Charging roller, process cartridge and image forming apparatus - An object of the present invention is to provide a charging roller (i) which includes a rubber member whose surface is subjected to a hardening treatment using a solvent containing at least an isocyanate compound and (ii) which can prevent leakage of an ionic conductive agent even if the charging roller is placed under conditions of high temperature and high humidity for a long time. The charging roller is made by forming a rubber layer on a metal core. The rubber layer is an epichlorohydrin based rubber base material to which an ionic conductive agent is added, the rubber layer being subjected to a surface treatment by applying a solution containing the isocyanate compound and heating it. This surface treatment is carried out under such conditions that a coefficient of dynamic friction at a contact portion between the rubber layer and a photoreceptor becomes 0.4 or less. | 01-07-2010 |