Kuniaki Nakano has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A radiographic image conversion panel containing a substrate having thereon a phosphor layer formed by a vapor-accumulating method, wherein the phosphor layer has a thickness distribution of not more than ±20%, the thickness distribution being defined by the formula: ((Dmax?Dmin)/(Dmax+Dmin))×100, provided that Dmax is a maximum thickness of the phosphor layer; and Dmin is a minimum thickness of the phosphor layer.
Abstract: In an image forming apparatus a primary transfer is carried out such that toner images on a plurality of photoreceptors are transferred and laminated onto an intermediate transfer member, and a recording paper and the intermediate transfer member are sandwiched between a secondary transfer roller disposed so as to be in contact with the intermediate transfer member and a secondary transfer counter roller disposed opposite to the secondary transfer roller, to carry out a secondary transfer that the toner images on the intermediate transfer member are transferred onto the recording paper. At the time, an electric field is applied to the recording paper, and further the secondary transfer counter roller is switched by a switch between grounded state and floating state so that a potential difference between the intermediate transfer member and the secondary transfer roller can be adjusted.
Abstract: In an image forming apparatus that uses a charging unit to charge a photosensitive drum, forms an electrostatic latent image by carrying out image exposure according to image information, and transfers to a paper the electrostatic latent image by developing the electrostatic latent image into a visible image using a developer so that the image information is presented, an exhaust duct 33 for exhausting air that contains ozone produced within a drum unit 30, which includes a photosensitive drum 3 and a charging unit 5, and a duct 32 for taking in air, which draws in fresh air, are provided within the drum unit 30 so that ventilation of the drum unit 30 can be carried out with excellent efficiency.
July 5, 2005
February 2, 2006
Sharp Kabushiki Kaisha
Takashi Hori, Kuniaki Nakano, Tomohiko Fujii, Yoshie Iwakura
Abstract: A radiation image conversion panel is disclosed, comprising a support having thereon a stimulable phosphor layer comprising a stimulable phosphor having a columnar crystal structure, and the columnar crystal structure having the columnar crystal diameter ratio meeting the following equation (1): 0?D2/D1?3.0 ??(1) A preparation method of the radiation image conversion panel is also disclosed.
Abstract: The invention relates to a radiation image conversion panel comprising a substrate having thereon a stimulable phosphor layer and a protective layer. The stimulable phosphor layer is provided on the substrate by a vapor-phase deposition method. Further, a construction including the substrate and the protective layer has a flexibility.
Abstract: A transfer apparatus and an image forming apparatus capable of transferring an image satisfactorily using developing agent are disclosed. A transfer system includes photosensitive drums corresponding to the respective colors arranged along the outer peripheral surface of a transfer belt and intermediate transfer rollers arranged offset downstream side from the respective photosensitive drums for applying a transfer field to the respective photosensitive drums. The transfer belt is configured of a material such as polyimide or polycarbonate in which a surge current of not less than a specified value flows immediately after application of a transfer voltage.
Abstract: A transfer apparatus and an image forming apparatus are disclosed, in which a plurality of photosensitive drums corresponding to the respective colors are arranged along the outer peripheral surface of a transfer belt and a plurality of intermediate transfer rollers for applying a transfer field to the photosensitive drums are arranged offset downstream side from each of the photosensitive drums, respectively. In addition to that, the process, the intermediate transfer rollers are arranged in such positions that each of the nip width are increased progressively downstream side, respectively and each of the nip pressure are decreased progressively downstream side, respectively.
Abstract: A cleaning system includes a rotating member and a cleaning blade which is forced against a curved outer surface of the rotating member to scrape off matter to be removed (toner) which is present along the outer surface of the rotating member. The cleaning blade has greater hardness than the outer surface of the rotating member.
Abstract: An image forming apparatus includes a pair of optical sensing devices for monochrome image forming and full-color image forming which are disposed at the rear of the image forming apparatus and a pair of generally L-shaped light shielding members for monochrome image forming and full-color image forming which are mounted swingably on a rear side of an image transfer unit with one end of each light shielding member attached to one of two sliding members. When each of the sliding members moves back and forth, the light shielding member for monochrome image forming or full-color image forming, whichever applicable, swings and the relevant optical sensing device detects the other end of the light shielding member.
Abstract: A transfer device has primary transfer rollers supported so as to be upwardly and downwardly movable within a path of movement and opposed to respective of photosensitive drums across a portion of an intermediate transfer belt. There are also provided a slide member for full-color image formation and a slide member for monochromatic image formation, which are capable of reciprocation in a horizontal direction. The transfer device includes roller lifting means each L-shaped and each having one end supporting an associated one of the transfer rollers for rotation and another end engaging an associated one of the slide members, and first and second coaxial rotating cams. The transfer device is capable of switching between three paths of movement of the intermediate transfer belt selectively by the first and second rotating cams rotating together.
Abstract: A transfer device has a plurality of first transfer rollers provided, one in each of a plurality of first transfer regions. The first transfer rollers are arranged downstream of respective image carriers in a traveling direction of an intermediate transfer belt, so as to be out of contact with the image carriers through the belt. In the first transfer region that is located most upstream in the traveling direction, there is a pressure member provided upstream of the image carrier in the traveling direction for pressing the intermediate transfer belt against the image carrier.
Abstract: A transfer device has a control circuit. The control circuit initiates supplying transfer power to one or more first transfer rollers and to a second transfer roller when a first transfer operation is initiated by a first transfer roller positioned most upstream with respect to a direction in which an intermediate transfer belt travels. The control circuit stops supplying the transfer power to the one or more first transfer rollers and to the second transfer roller when a second transfer operation is completed by the second transfer roller. The transfer power supplied to the one or more first transfer rollers and to the second transfer roller, respectively, is free from fluctuation during a period from the initiation of the first transfer operation performed first to the completion of the second transfer operation.
Abstract: It is to provide a radiation image conversion panel exhibiting superior homogeneity of an activator in a phosphor layer and enhanced luminance and sharpness, and a preparation method of the same. Described is the radiation image conversion panel having a stimulable phosphor layer on a support, wherein the stimulable phosphor layer is formed by a vapor-phase growth process so as to have a layer thickness of 50 ?m to 1 mm after a thermoplastic resin film is prepared on the support or the stimulable phosphor layer mentioned above is formed on the support composed of a thermoplastic resin containing a carbon fiber.
Abstract: A transfer device is provided including an intermediate transfer belt and transfer rollers associated with respective of photosensitive drums. Each of the transfer rollers and the intermediate transfer belt define therebetween a contact range of which center lies downstream of the center of a contact range (transfer nip region) defined between the associated photosensitive drum and the endless belt in the direction of movement of the endless belt. The transfer roller deforms the path of movement of the intermediate transfer belt by contacting the intermediate transfer belt, and the resulting deformation causes the intermediate transfer belt to contact the periphery of the photosensitive drum over a predetermined range.
Abstract: A cleaning blade for removing residual toner left on the surface of an intermediate transfer belt after the second transfer is supported integrally with movement of a tension roller. In the case where the tension roller moves to make a tension of the intermediate transfer belt constant, then, following this, the cleaning blade moves. Thus, the contact state of the cleaning blade with respect to the surface of the intermediate transfer belt is kept constant, and thus cleaning of the intermediate transfer belt can be performed stably.
Abstract: A radiation image conversion panel is disclosed, comprising a support having thereon a stimulable phosphor layer formed by vapor deposition of a stimulable phosphor, wherein the stimulable phosphor layer meets the following requirement: 0?B?90A?0.17 wherein A is a thickness (?m) of the stimulable phosphor layer and B is a transmittance (%) of a stimulating light or a stimulated emission.
Abstract: The reliability of the airtight sealed section is improved by providing a metallic or ceramic insertion member at a portion positioned between an electricity introducing member and a narrow tube in the airtight sealed section. The difference between the inner diameter of the narrow tube and the outer diameter of the insertion member is made 0.02 to 0.6 mm. The electricity introducing member is constructed by a halogen-resistant first member and a second member whose coefficient of linear expansion is similar to that of the narrow tube, and the junction of the first member and second member is covered with a halogen-resistant glass sealant. The difference between the insertion length of the second member into the narrow tube and the flow-in length of the glass sealant into the narrow tube is made 1 mm or more.
Abstract: Disclosed is a radiation image conversion panel by a vapor deposition method, in which a variation coefficient of distribution of a maximum intensity in an X-ray diffraction pattern inside the stimulable phosphor layer on a plane of a stimulable phosphor layer is not more than 40%.
Abstract: A radiation image conversion panel is disclosed, comprising a support having thereon a stimulable phosphor layer comprising columnar crystals of a stimulable phosphor, wherein the columnar crystals are isotropically distributed on the support outwardly from the center of the support with respect to columnar crystal diameter. There is also disclosed a preparation method thereof.
Abstract: A radiation image conversion panel exhibiting improved resistance to peeling or shock as well as enhanced sharpness is disclosed, comprising on a support a stimulable phosphor layer composed of columnar phosphor crystals formed through gas phase deposition, wherein the stimulable phosphor layer exhibits an X-ray diffraction pattern meeting the following ratio (I2/I1) of the highest peak intensity I1 and the second highest peak intensity I2: 0.3?I2/I1?1.0.