Patent application number | Description | Published |
20090051991 | OPTICAL BEAM SCANNING APPARATUS AND IMAGE FORMING APPARATUS - An optical beam scanning beam apparatus includes: a light source that emits one or more light fluxes; an optical beam deflecting device that deflects the light flux, which is emitted from the light source, to an scanned object in a main scanning direction; and an aperture part provided between the light source and the optical beam deflecting device. The aperture part includes a first aperture through which a main light beam of the light flux emitted from the light source passes, and at least one second aperture which is different from the first aperture and is provided at one or more of both sides or one side in the main scanning direction and a sub-scanning direction of the first aperture. With this configuration, it is possible to properly reduce sidelobe occurring in a beam profile. | 02-26-2009 |
20090067882 | IMAGE FORMING APPARATUS, BEAM SCANNING APPARATUS THEREOF, AND METHOD OF BEAM SCANNING THEREOF - Provided is an image forming apparatus including: a photoconductor; a light including main exposure devices and redundant exposure devices; a beam scanning unit arranging main laser beam spots such that the they are separated by an image-forming unit distance, arranging redundant laser beam spots such that they are separated by the image-forming unit distance subsequently to the main laser beam spots, and simultaneously scan the main and redundant laser beam spots in the main scanning direction; and a device selection unit selecting exposure devices used in one-time scanning from the main and redundant exposure devices, wherein, when an image continuous in the sub scanning direction are exposed, the device selection unit selects the exposure devices such that the number of pairs of pixels which are adjacent and exposed by different scannings is equalized without depending on writing start positions of the image in the sub scanning direction. | 03-12-2009 |
20090128879 | CYLINDRICAL LENS, OPTICAL BEAM SCANNING APPARATUS USING THE SAME, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING THE LENS - A cylindrical lens according to the present invention is a cylindrical lens of a bi-concave type in which both of a surface on which light is made incident and a surface from which the light is emitted are formed as concave surfaces, wherein, in at least one of the concave surfaces, both ends of the concave surface projecting to outer sides are formed to coincide with a plane, a normal of the plane being an optical axis of the cylindrical lens. | 05-21-2009 |
20110007105 | INK JET APPARATUS AND LIQUID CIRCULATING METHOD - According to one embodiment an ink jet apparatus includes, an ink jet head, a first tank, a second tank, a third tank, a first flow channel, a second flow channel, and a flow control mechanism. The first tank is disposed upstream of the ink jet head with respect to a flow of ink. The second tank is disposed downstream of the ink jet head with respect to the flow of ink. The third tank is disposed downstream of the ink jet head with respect to the flow of ink. The first flow channel connects the first tank to the ink jet head and connects the ink jet head to the second tank and the third tank. The second flow channel connects the second tank and the third tank with the first tank. The flow control mechanism controls a pressure state of at least one of the second tank and the third tank. | 01-13-2011 |
20110148997 | INK JET RECORDING APPARATUS - According to one embodiment, an inkjet recording apparatus includes a plurality of inkjet heads, a common supply pipe, a common collection pipe and an ink tank device. The common supply pipe includes an upper inner wall from one end side in a longitudinal direction to the other end side, which is inclined with respect to a horizontal direction from the one end side to the other end side if an ink flow direction and opposite direction of a gravitational force are defines as positive axes. The common collection pipe is supplied with the ink from the common supply pipe at one end side in the longitudinal direction. The ink tank device supplies the ink to the one end side of the common supply pipe, and collects the ink from the common collection pipe. | 06-23-2011 |
20110279495 | INK JET RECORDING APPARATUS - According to one embodiment, an ink jet recording apparatus includes an ink jet head, a first tank arranged above the ink jet head and configured to store ink to be supplied to the ink jet head, a first tank valve that opens and closes in order to switch the inside of the first tank to be opened to or shut off from the atmosphere, a second tank arranged below the ink jet head and configured to store the ink collected from the ink jet head, a second tank valve that opens and closes in order to switch the inside of the second tank to be opened to or shut off from the atmosphere, a pipe configured to connect the ink jet head, the first tank, and the second tank and form a part of a circulation shape, a pump provided in the pipe between the first tank and the second tank, a passive pressure adjusting device connected to the second tank, arranged below the first tank, and configured to generate negative pressure using the gravity, and a third tank valve provided between the second tank and the passive pressure adjusting device. | 11-17-2011 |
20120038727 | INKJET PRINTER AND INK EJECTING METHOD - According to one embodiment, the inkjet printer includes an endless device which has a circumferential surface for adsorbing a sheet, an inkjet head for ejecting ink, a tray, and a controller. The tray is moved from a home position toward the inkjet head along a circumferential surface of the endless device, using the tray moving mechanism. The tray is inserted to a clearance between the circumferential surface of the endless device and the inkjet head. The inkjet head ejects ink toward the tray if the tray moves to a position facing the inkjet head. | 02-16-2012 |
20120069114 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - According to one embodiment, an image forming apparatus includes a retaining roller, a nipping device, a retaining device, an image forming head, and a controller. The retaining roller retains a recording medium and rotates. The nipping device is capable of operating to open and close and holds the recording medium between the nipping device and the surface of the retaining roller to mechanically retain the recording medium. The retaining device retains the recording medium on the surface of the retaining roller. The controller controls, on the basis of a condition for use of the recording medium, the nipping device to nip the recording medium between the nipping device and the surface of the retaining roller. | 03-22-2012 |
20120075683 | CYLINDRICAL LENS, OPTICAL BEAM SCANNING APPARATUS USING THE SAME, IMAGE FORMING APPARATUS, AND METHOD OF MANUFACTURING THE LENS - A cylindrical lens according to the present invention is a cylindrical lens of a bi-concave type in which both of a surface on which light is made incident and a surface from which the light is emitted are formed as concave surfaces, wherein, in at least one of the concave surfaces, both ends of the concave surface projecting to outer sides are formed to coincide with a plane, a normal of the plane being an optical axis of the cylindrical lens. | 03-29-2012 |
20120092431 | RECORDING MEDIUM CARRYING DEVICE, IMAGE FORMING APPARATUS, AND RECORDING MEDIUM CARRYING METHOD - According to one embodiment, an apparatus includes a leading end gripper and a trailing end gripper provided on a drum. The leading end gripper is moved by a leading end gripper driving mechanism. The trailing end gripper switches between a standby position where this gripper is stopped relatively to the rotating drum and a grip position where this gripper rotates with the drum. The leading end gripper and a recording medium pass through an inside of the trailing end gripper stopped in the standby position. If a trailing end of the recording medium reaches the trailing end gripper, the trailing end gripper is released and switches to the grip position. Thus, the trailing end of the medium is held on the drum by the trailing end gripper. The trailing end gripper moves in a rotating direction of the drum while continuing nipping the trailing end of the medium. | 04-19-2012 |
20130100213 | INK SUPPLY APPARATUS - According to one embodiment, an ink supply apparatus supplies ink to a recording head. The ink supply apparatus includes a pump for circulating ink, a first tank for supplying ink to the recording head, a second tank for receiving ink from the recording head, a third tank supplied with ink from an ink supply source, a first pressure adjusting mechanism, arranged between the first tank and the third tank, which is open if the pressure in the first tank is greater than a first given value to discharge ink in the first tank to the third tank, and a second pressure adjusting mechanism, arranged between the third tank and the second tank, which is open if the pressure in the third tank is lower than a second given value smaller than the first given value to draw ink in the third tank into the second tank. | 04-25-2013 |
20140071220 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - In accordance with an embodiment, an optical scanning apparatus for exposing a photoconductor includes a light source, a deflecting device, an imaging optical system and a light-guiding optical system. The light source configured to emit a light beam. The deflecting device configured to deflect and scan the light beam from the light source. The imaging optical system configured to form an image by using the deflected and scanned light beam on the photoconductor. The light-guiding optical system configured to guide the light beam passing through the imaging optical system to a photodetector. | 03-13-2014 |
20140118455 | OPTICAL SCANNING APPARATUS AND IMAGE FORMING APPARATUS - An optical scanning apparatus scanning a light in a specific direction comprises a light source configured to irradiate a light; a diaphragm plate configured to comprise an opening section through which the light from the light source passes; and a holder configured to hold the diaphragm plate. The holder holds the diaphragm plate in a state of curving the diaphragm plate. The diaphragm plate in a curved state elastically deforms and comes into close contact with the holder through elastic deformation force. | 05-01-2014 |