Class / Patent application number | Description | Number of patent applications / Date published |
399303000 | Copy medium carrier (e.g., drum or belt) | 31 |
20080205946 | IMAGE FORMING APPARATUS AND DEVELOPING DEVICE THEREOF - An image forming apparatus having the improved construction and mounting structure of a device for charging paper to be attached to a paper feed body is disclosed. The image forming apparatus includes a plurality of developing devices and a paper feed body which is mounted opposite to the plurality of developing devices and rotates to feed paper. A sheet member is mounted to a developing device of the plurality of developing devices, which is disposed on an uppermost paper stream side in a feeding direction of the paper. The sheet member charges the paper as it advances to the paper feed body to attach the paper to the paper feed body. The image forming apparatus further includes a voltage transmission part which transmits high voltage to the sheet member. The voltage transmission part includes a conductive fixing member to which an end of the sheet member is fixed, and a voltage transmission plate having a first end portion with a terminal contact portion to contact a terminal mounted in a main body and a second end portion electrically connected to the fixing member. | 08-28-2008 |
20090148202 | IMAGE FORMING APPARATUS - In a black monochromatic mode, an intermediary transfer belt is separated from an upstream photosensitive drum in a state in which a downstream photosensitive drum contacts the intermediary transfer belt. At this time, a stretching roller is moved upwardly in interrelation with a contact-separation mechanism to increase an angle of contact of the intermediary transfer belt with the downstream photosensitive drum compared with the case of a full-color mode. On the other hand, in the full-color mode, the stretching roller is moved downwardly to be separated from an inner surface of the intermediary transfer belt. | 06-11-2009 |
20100247174 | DISPLACEMENT CORRECTING DEVICE, INTERMEDIATE TRANSFER DEVICE, TRANSFER DEVICE, AND IMAGE FORMING APPARATUS - An displacement correcting device is provided and includes: a rotation supporting member having a rotation shaft and rotating to support the endless belt-shaped member; a shaft supporting frame supporting a one-end supporting portion of the rotation shaft movably relative to an opposite-end supporting portion and supporting one end of the rotation shaft to be tilted about the other end; and a shaft displacing member having a rotation center disposed closer to one end portion in the axial direction than a rotation shaft supporting body and intersected by the axial direction and a rotation shaft contact portion contacting with the one end of the rotation shaft. The shaft displacing member allows the rotation shaft contact portion to rotate about the rotation center to tilt the rotation shaft when a movement sensing member detects the movement of the endless belt-shaped member to the one end of the rotation shaft. | 09-30-2010 |
20110164902 | TRANSFER DEVICE - A transfer device of the invention includes an endless belt forming a loop-shaped path of movement passing over between a drive roller and an idle roller, a plurality of image bearing members disposed at positions along a direction of movement of the endless belt, and a plurality of transfer members disposed at positions on respective downstream sides of the plurality of image bearing members so as to oppose a plurality of respective image bearing members across the endless belt. The image bearing member disposed on the most upstream side in the direction of movement of the endless belt has a zone of contact in common with the opposed transfer member in the direction of movement of the endless belt. Whereas the other image bearing members do not have any zone of contact in common with the opposing respective transfer members in the direction of movement of the endless belt. | 07-07-2011 |
20130108333 | BELT MEMBER FEEDING DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH THE SAME | 05-02-2013 |
399304000 | Having gripper | 26 |
20100260520 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus, including: an image carrier for carrying an image; a transfer roller including a holder member that holds a transfer material, a groove portion in which the holder member is disposed, and an elastic member disposed over the transfer roller except a portion where the groove portion is disposed, the elastic member of the transfer roller is pressed onto the image carrier to transfer an image from the image carrier onto the transfer material; and
| 10-14-2010 |
20100272479 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus including: an image carrier that carries an image; a transfer roller having a transfer material-gripping member that grips a transfer material, the transfer roller transferring the image carried by the image carrier to the transfer material; a transfer material-transporting belt that transports the transfer material onto which the image has been transferred while subjecting the transfer material to suction; a fixing section that fixes the transferred image on the transported transfer material; and a transfer material-guiding section having a guiding surface that guides the transported transfer material to the fixing section, the guiding surface being disposed in a direction in which the transfer material is sucked onto the transfer material-transporting belt relative to a transfer material-transporting surface of the transfer material-transporting belt. | 10-28-2010 |
20100272480 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus including an image carrying belt which has volume resistance from 10 | 10-28-2010 |
20100303516 | TRANSFER DEVICE AND IMAGE FORMING APPARATUS PROVIDED WITH THE TRANSFER DEVICE - A transfer device including a transfer roller including a roller base member which opposes an image carrier carrying an image, the transfer device rotates about an axis of rotation, and has a concaved portion on an outer circumference thereof and is configured to transfer the image carried by the image carrier to a recording medium when the concaved portion is not opposed to the image carrier, the device also including a pressing portion configured to press the transfer roller to the image carrier, and a contact portion provided at either end of the transfer roller, wherein the contact portion includes an outer circumference which comes into contact with a supporting portion disposed on a drive transmitting portion configured to transmit a drive to the image carrier while the concaved portion opposes the image carrier, and an elastic member is provided on the outer circumference of the contact portion. | 12-02-2010 |
20110008079 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes an image carrier, a transfer roller, a transfer roller position detector and a controller. The transfer roller includes a concaved portion formed on a circumferential surface thereof with the concaved portion having a width in the circumferential direction larger than a width of a transfer nip formation area formed between the image carrier and the transfer roller in the circumferential direction. The transfer roller includes an elastic member disposed on the circumferential surface thereof. The transfer roller position detector is configured and arranged to detect a rotational position of the transfer roller. The controller is configured to stop rotation of the transfer roller in a state in which the concaved portion is located at the transfer nip formation area on the basis of the rotational position of the transfer roller. | 01-13-2011 |
20110008080 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes a latent image bearing unit, an exposure unit, a developing unit, a transfer medium, a transfer roller and a detecting unit. A latent image formed on the latent image bearing unit by an exposure unit is developed by the developing unit with a liquid developer, and a developed image on the latent image bearing unit is transferred to a transfer. The transfer roller includes a cylindrical portion with a concaved portion formed in an axis direction of a circumferential surface of the cylindrical portion, and a transfer material supporting member fixed in the concaved portion and wound around a circumferential surface of the cylindrical portion to support a transfer material. The detecting unit is configured and arranged to detect a rotation position of the transfer roller when the transfer medium and the transfer roller come into contact with each other with the transfer material being interposed therebetween. | 01-13-2011 |
20110081172 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes: an image bearing member that bears an image; and a transfer roller, having a concave portion in its circumferential surface and rotating central to a rotational axis, whose circumferential surface aside from the concave portion makes contact with the image bearing member and transfers the image onto a recording material. The circumferential surface of the transfer roller aside from the concave portion makes contact with the image bearing member due to rotation of the transfer roller while the rotational axis of the transfer roller moves away from the image bearing member. | 04-07-2011 |
20110097120 | IMAGE FORMING APPARATUS AND TRANSFER DEVICE - An image forming apparatus including: a belt-shaped image carrier configured to carry an image; a first imaging unit configured to transfer a first image to the image carrier; a second imaging unit configured to transfer a second image to the image carrier on which the image is transferred by the first imaging unit; a drive roller configured to circulate the image carrier by winding the image carrier thereon; a roller on which the image carrier is wound; a transfer roller having a concaved portion on part of a circumferential surface thereof which comes into abutment with the image carrier wound around the roller via a recording material; a drive unit configured to drive the transfer roller; and a gripping portion disposed in the concaved portion and configured to grip the recording material. | 04-28-2011 |
20110123236 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus is provided which includes: an image carrier that carries an image; a transfer roller that includes a gripping member, and transfers the image to the transfer medium; a suction guide portion that includes a suction unit, and suctions and guides the transfer medium transferred the image, vertically upward with a plane transferred the image of the transfer medium being directed vertically downward; and a transfer medium transporting section that includes a suction member and transports the transfer medium while suctioning the transfer medium by the suction member, the transfer medium transporting section being configured such that a position of starting to suction the transfer medium is arranged at a position having a predetermined relationship with respect to a position of releasing the transfer medium from the gripping member and a position at which the image carrier is separated from the transfer medium. | 05-26-2011 |
20110194878 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image carrier; a transfer member transfers the image carried on the outer circumferential surface of the image carrier onto a recording medium; a holding member that holds, on an outer circumferential surface of the transfer member, the recording medium fed to the transfer member; and a control unit that performs control so that in first image formation operation in which images of plural colors carried by the image carrier are sequentially transferred onto a single recording medium one color at a time, the holding member holds the recording medium on the transfer member, and in second image formation operation in which an image of a single color carried by the image carrier is transferred onto a single recording medium, the holding member does not hold, the recording medium on the transfer member. | 08-11-2011 |
20110236081 | IMAGE FORMING APPARATUS - An image forming apparatus includes: an image carrier; a transfer member that transfers an image onto a recording medium; a leading-end holding member that holds a leading-end side of the recording medium, which is fed to the transfer member, between the leading-end holding member and an outer circumferential surface of the transfer member, in such a way to restrict displacement of the recording medium and to restrict movement of the recording medium in a direction away from the transfer member; and a rear-end holding member that holds a rear-end side of the recording medium, in the transporting direction thereof, between the rear-end holding member and the outer circumferential surface of the transfer member, in such a way to allow displacement of the recording medium in the transporting direction and to restrict movement of the recording medium in the direction away from the transfer member. | 09-29-2011 |
20110318067 | IMAGE FORMING APPARATUS AND METHOD OF IMAGE FORMING - An image forming apparatus includes an image carrier that is rotatable; a transfer member that is rotatably disposed so as to face the image carrier, the transfer member transferring an image carried by the image carrier to a sheet; a leading end gripping member that is attached to the transfer member, the leading end gripping member gripping a leading end of the sheet in the transport direction on an outer peripheral surface of the transfer member; a trailing end holding member that holds a trailing end of the sheet in the transport direction between the trailing end holding member and the outer peripheral surface of the transfer member; and a controller that changes a distance between the leading end gripping member and the trailing end holding member when holding the sheet on the basis of a length of the sheet in the transport direction. | 12-29-2011 |
20110318068 | IMAGE-FORMING DEVICE AND IMAGE-FORMING METHOD - An image-forming device comprising: an image-carrier belt that carries an image; a belt-driving roller that causes the image-carrier belt to move, the image-carrier belt being engaged around the belt-driving roller; a tension roller that applies a tension to the image-carrier belt, the image-carrier belt being engaged around the tension roller; a transfer roller having a concaved portion and a gripper, the transfer roller coming into contact with the tension roller interposed by the image-carrier belt, and transferring the image that is carried by the image-carrier belt onto the transfer material; a contacting/diverging part that causes the tension roller to move and that causes the transfer roller and the image-carrier belt to come into contact with or diverge from one another; a delivery part that delivers the transfer material that is gripped by the gripper; and a support member that pivotally supports the transfer roller and supports the delivery part. | 12-29-2011 |
20120063820 | IMAGE-FORMING APPARATUS AND IMAGE FORMING METHOD - An image-forming apparatus includes a transfer roller having a recessed portion in a circumferential surface; a driving portion for rotatably driving the transfer roller; an image carrier belt for carrying an image; a tension roller around which the image carrier belt is wound for making contact with the transfer roller interposed by the image carrier belt; a biasing portion for biasing the tension roller towards the transfer roller; and a position-regulating portion that, when the transfer roller rotates and the transfer roller and the image carrier belt make contact, causes a position to be maintained at which the image carrier belt wound around the tension roller intersects a virtual circumferential surface that is an extension of the circumferential surface of the transfer roller into the recessed portion. | 03-15-2012 |
20120230739 | IMAGE FORMING APPARATUS AND TRANSFER DEVICE - An image forming apparatus includes: an image carrier that is rotatably arranged and carries an image on an outer circumferential surface thereof; a transfer member that is rotatably arranged to face the image carrier and transfers the image carried on the image carrier onto a sheet held between the transfer member and the image carrier; a leading edge gripping member that is secured to the transfer member and grips a leading edge side of the sheet in a transport direction thereof on an outer circumferential surface of the transfer member; and a trailing edge holding member that is arranged to be rotatable around the transfer member, holds a trailing edge side of the sheet in the transport direction thereof between the trailing edge holding member and the outer circumferential surface of the transfer member, and bends to release the trailing edge side of the sheet in the transport direction thereof. | 09-13-2012 |
20130064582 | IMAGE FORMING APPARATUSES AND METHODS THEREOF - Image forming apparatus and methods are disclosed which include an intermediate transfer member to transfer images to media, an impression roller including a gripping device to receive the media, and a determination module to determine the length of the media held by the at least one gripper unit based on respective detections by first and second set of sensors. | 03-14-2013 |
20130071151 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrying member, a transfer member, a leading-end holding member, and a trailing-end holding member. The leading-end holding member is mounted on the transfer member and holds, on an outer peripheral surface of the transfer member, a leading-end portion of a recording medium fed to a sheet feeding position that is further upstream than a transfer position in a rotation direction of the transfer member. The trailing-end holding member rotates along the outer peripheral surface. The trailing-end holding member presses the recording medium against the outer peripheral surface while waiting at a waiting position that is further upstream than the transfer position and downstream than the sheet feeding position, and holds a trailing end portion on the outer peripheral surface while rotating together with the transfer member when the trailing end portion of the recording medium arrives at the waiting position. | 03-21-2013 |
20130078012 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a transfer member, a gripper that grips a leading end portion of a recording medium, and a restraining portion that is disposed so as to face an outer peripheral surface of the transfer member and that is movable relative to the transfer member. The restraining member restrains a trailing end portion of the recording medium that is gripped by the gripper from rising. The restraining portion has widths in a rotational axis direction of the transfer member and in a transport direction of the recording medium and is capable of facing the recording medium in a faceable region, and a part of the faceable region over which the restraining portion faces the trailing end portion of the recording medium is larger than a part of the faceable region over which the restraining member does not face the trailing end portion. | 03-28-2013 |
20130209144 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a transfer member, a leading end holding member, a trailing end holding member, and a movement mechanism. The trailing end holding member is disposed at a standby position such that there is a space between the trailing end holding member and the transfer member. The trailing end holding member is rotatable around the transfer member along a rotation path on which the standby position is located. In a multiple transfer operation, the trailing end holding member holds a trailing end of the recording medium after a leading end of the recording medium held by the leading end holding member has passed through the space. In a single transfer operation, the movement mechanism moves the trailing end holding member from the standby position to a position that is not on a transport path of the recording medium. | 08-15-2013 |
20130223895 | IMAGE FORMING APPARATUS - In an image forming apparatus, the following inequalities (1) and (2) are satisfied: | 08-29-2013 |
20130223896 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a transfer body, an elastic layer, a gripper, and a pressing member. The gripper is located in a cutout region in which a cutout is formed. The gripper grips a leading end portion of the recording medium wrapped around the transfer body and releases the leading end portion that is to be separated from the transfer body. At least part of the pressing member is located closer to a trailing-end side of the recording medium than the gripper. The pressing member presses a leading end side of the recording medium, whose leading end portion is gripped by the leading-end gripper, against the elastic layer. | 08-29-2013 |
20130223897 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a transfer body transporting a recording medium to a transfer position multiple times in order to sequentially transfer toner images formed on a surface of the image carrier to the recording medium, a trailing-end restricting member that is movable relative to the transfer body in a circumferential direction of the transfer body, the trailing-end restricting member rotating together with the transfer body when restricting a position of a trailing end portion of the recording medium wrapped around the transfer body, a driving member that rotates the transfer body, and a transmitting device that transmits a rotary force, with which the driving member rotates the transfer body, to the trailing-end restricting member when the trailing-end restricting member is rotated together with the transfer body. | 08-29-2013 |
20130223898 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier that carries a developer image, a recording-medium transporting member that includes a holding portion that holds a leading end of a recording medium wrapped around the recording-medium transporting member, a retaining portion that switches between a state in which the retaining portion retains a trailing end portion of the recording medium and a state in which the retaining portion does not retain the trailing end portion, a position adjusting unit that adjusts the position at which the retaining portion retains the trailing end portion, a transfer unit that transfers the developer image onto the recording medium, a determination unit that determines a thickness of the recording medium, and a control unit that causes the retaining portion to retain the trailing end portion at a position adjusted by the position adjusting unit in accordance with the thickness of the recording medium. | 08-29-2013 |
20130223899 | RECORDING-MEDIUM TRANSPORTING BODY, TRANSFER DEVICE, AND IMAGE FORMING APPARATUS - A recording-medium transporting body includes a cylindrical portion, a contact unit, and a holding portion. The cylindrical portion has a cut portion in an outer peripheral surface thereof and allows a recording medium to be wrapped around the outer peripheral surface. The contact unit is provided in the cut portion and includes first and second contact portions having first and second coefficients of friction with respect to the recording medium, the second coefficient of friction being higher than the first coefficient of friction. A leading end of the recording medium comes into contact with the first contact portion before coming into contact with the second contact portion. The holding portion holds the recording medium between the contact unit and the holding portion. | 08-29-2013 |
20130223900 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier, a transfer member, a leading end holding member, a trailing end holding member, a detection unit, and a stopping unit. The trailing end holding member is disposed so as to be rotatable around the transfer member such that a gap is formed between the trailing end holding member and the transfer member. The trailing end holding member holds a trailing end of the recording medium after a leading end of the recording medium held by the leading end holding member has passed through the gap. The detection unit detects whether the leading end of the recording medium passes through the gap after the leading end holding member performed a holding operation on the leading end. The stopping unit stops rotation of the transfer member when the detection unit detects that the leading end does not pass through the gap. | 08-29-2013 |
20130230343 | TRANSFER DEVICE AND IMAGE FORMING APPARATUS - A transfer device includes a transfer body that transports a recording medium to a transfer position to transfer toner images to the recording medium; a leading-end gripping member that grips a leading-end portion of the recording medium when causing the recording medium to be wrapped around the transfer body and releases the leading-end portion when causing the recording medium that has been wrapped around the transfer body to become separated from the transfer body; and a moving member that moves, after a final toner image starts being transferred to the recording medium but before the leading-end gripping member releases the leading-end portion, the leading-end gripping member while the leading-end gripping member grips the leading-end portion in order to cause a leading-end side of the recording medium to become separated from the transfer body. | 09-05-2013 |