Patent application number | Description | Published |
20110008072 | ROTOR ROTATING APPARATUS, DEVELOPING APPARATUS, AND IMAGE FORMING APPARATUS - A rotor rotating apparatus includes: a first rotor that rotates; a second rotor supported rotatably at the first rotor and so as to revolve around an axis of the first rotor with rotation of the first rotor; a drive unit for rotating the second rotor; a transmission member configured to move along a direction of a rotation axis of the second rotor between a transmission position at which the transmission member transmits the drive force from the drive unit to the second rotor and a non-transmission position at which the transmission member idles: and a guide member that moves the transmission member to the transmission position when the first rotor is in a first rotation position, and moves the transmission member to the non-transmission position by rotation of the first rotor from the first rotation position. | 01-13-2011 |
20110236077 | DEVELOPING DEVICE AND IMAGE FORMING APPARATUS - A developing device include: a toner carrier that is arranged oppositely to an image carrier; a toner-flying electrode member spaced apart from the toner carrier; and an oscillating electric field generating power source that connects the toner-flying electrode member and the toner carrier, and generates an oscillating electric field which causes the toner to fly from the toner carrier. The toner-flying electrode member includes a conductive member that extends at least along a rotational axis direction of the toner carrier; an insulating coating layer that applies insulating coating continuously to a conductive member surface located on a toner carrier side; and an exposed portion where the conductive member surface adjacent to the insulating coating layer and located on an image carrier side is exposed. | 09-29-2011 |
20120251149 | IMAGE FORMING APPARATUS AND TRANSFER DEVICE - An image forming apparatus includes a main body portion including an image carrier, an image-carrier driving unit, a latent-image forming unit, a developing-unit attachment section, and a transfer-unit attachment section. The developing-unit attachment section receives a first developing unit having plural developing members or a second developing unit having a single developing member. The transfer-unit attachment section receives a first transfer unit, which includes a first transfer member capable of retaining a recording medium and a first transfer driving unit that rotates the first transfer member, and a second transfer unit, which includes a second transfer member that cannot retain the recording medium. When the first developing unit and the first transfer unit are attached to the developing-unit attachment section and the transfer-unit attachment section, respectively, the first transfer driving unit is mechanically connected to the first developing unit. | 10-04-2012 |
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 |
20130223863 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier; a transfer body; a leading-end gripping member that grips a leading-end portion of the recording medium when the recording medium is transported and that releases the leading-end portion when the recording medium to which a final toner image starts being transferred is separated from the transfer body; and a controller that controls a peripheral velocity of the transfer body and a peripheral velocity of the image carrier to change a ratio between the peripheral velocity of the transfer body and the peripheral velocity of the image carrier from a first ratio for transferring a toner image that precedes the final toner image to the recording medium to a second ratio for transferring the final toner image to the recording medium by making the peripheral velocity of the transfer body higher than the peripheral velocity of the image carrier. | 08-29-2013 |
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 |
20130223907 | IMAGE FORMING APPARATUS - An image forming apparatus includes an image carrier that carries a developer image, a recording-medium transporting member that is movable between an opposing position at which the transporting member opposes the image carrier and a retracted position that is farther from the image carrier than the opposing position and includes a holding portion that holds a leading end of a recording medium, a retaining portion that is movable between a retaining position at which the retaining portion retains a trailing end of the recording medium and a separate position that is farther from the transporting member than the retaining position, a transfer unit that transfers the developer image onto the recording medium, and an allowing unit that allows the transporting member to be separated from the retaining portion when the transporting member is moved from the opposing position to the retracted position. | 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 |
20130308989 | IMAGE RECORDING APPARATUS - An image recording apparatus includes a toner transporting member that transports a toner layer while carrying the toner layer on a first surface of the toner transporting member, the toner transporting member including the first surface and a second surface; a heating unit including heating elements that contact the second surface that is opposite to the first surface of the toner transporting member, and that generate heat in accordance with image information, the first surface contacting a recording medium and carrying the toner layer; and a transferring unit that selectively transfers toner at an image portion to the recording medium as a result of causing each heating element of the heating unit to generate the heat with a temperature of the heating elements at the image portion and a temperature of the heating elements at a non-image portion being different from each other. | 11-21-2013 |
20130308991 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes an image forming unit that forms an image on a recording medium, a glossiness imparting unit that imparts glossiness to the image formed on the recording medium, and a glossiness reducing unit that reduces the glossiness of at least a part of the image to which the glossiness has been imparted by the glossiness imparting unit. | 11-21-2013 |
20130315641 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD - An image forming apparatus includes an image forming unit that forms an unfixed toner image on a recording medium; a transfer unit that carries a layer of the UV-curable resin thereon and transfers a UV-curable resin to the recording medium, on which the image forming unit has formed the unfixed toner image, by making the UV-curable resin contact the recording medium; and an irradiation unit that irradiates the UV-curable resin transferred to the recording medium with UV rays. | 11-28-2013 |