Abstract: A cylindrical fixing member for use with a fixing device includes a heat generating layer and an electrode layer contacting the heat generating layer. The electrode layer is smaller in volume resistance value than the heat generating layer. The electrode layer is formed in a helical shape so that a helical axis thereof extends in a direction along a generatrix direction of the fixing member. One end and the other end of the electrode layer are electrically open.
Abstract: A fusing device includes a driving roller and a fusing unit. The driving roller is for driving a printing media to move. The fusing unit includes a heat insulating component, a heating component, a heat conductive component, a heat reflecting component and a fusing component. The heating component is for generating heat. The heat reflecting component includes a reflecting portion having a cross section formed in a conic section substantially. The reflecting portion is located at a side of the heating component away from the heat conductive component for reflecting the heat generated from the heating component to the heat conductive component. The heat conductive component transfers the heat to the fusing component. The fusing component contacts with the printing media to fuse toners onto the printing media when the driving roller drives the printing media to move.
Abstract: In one example, a system for transferring an image from a photoconductor to a print substrate includes a transfer member having a removable blanket wrapped around a rotatable drum and a laser. The blanket has a light absorbing exterior surface to receive a liquid LEP ink image from the photoconductor and to release a layer of molten toner to a print substrate. As the drum rotates, the laser exposes a width of the exterior surface of the blanket carrying a liquid LEP ink image to a beam of coherent light that delivers enough power to transform the liquid LEP ink image into molten toner.
Abstract: Examples of charging a photoconductive layer in an image forming apparatus are described. In one example, a method includes applying a charging voltage to the photoconductive layer and measuring surface voltages of the photoconductive layer at a plurality of positions on the photoconductive layer. Based on the measured surface voltages, a correction voltage profile is determined. The determined correction voltage profile includes at least a first correction voltage associated with a first position on the photoconductive layer and a second correction voltage associated with a second position, different to the first position, on the photoconductive layer. The method includes applying the first correction voltage to the photoconductive layer and applying the second correction voltage to the photoconductive layer.
Abstract: In some examples, a printing liquid developer includes a developer roller that has a hollow tubular base body formed of a material including conductive carbon fiber, a conductive, compliant layer around an outer surface of the hollow tubular base body, and an electrically conductive support separate from the hollow tubular base body and electrically contacted to a surface of the hollow tubular base body.
January 28, 2016
Date of Patent:
October 1, 2019
HP Indigo B.V.
David Sabo, Stanley J. Kozmiski, Guang Jin Li, John W. Godden
Abstract: A drive transmission device, which is included in an image forming apparatus, includes a drive transmission body to which a drive force is applied from a driving source, and a rotary shaft having a press-in portion mounted on one end thereof in the axial direction. The press-in portion has multiple planes disposed parallel to an axial direction and configured to receive the drive transmission body. The multiple planes include upstream and downstream side planes disposed downstream from the upstream side plane in a press-in direction of the drive transmission body. The upstream and downstream side planes are aligned along the press-in direction of the drive transmission body and have respective distances different from each other from an axial center of the rotary shaft. A distance from the downstream side plane to the axial center is greater than a distance from the upstream side plane to the axial center.
Abstract: An image forming apparatus includes a fixing member and a pressing member forming a fixing nip therebetween, a heat generator, and a processor. The heat generator is disposed to heat a print medium passing through the fixing nip via the fixing member. The processor is configured to control the heat generator to start heating at a timing when a non-fixed image portion formed on the print medium is expected to reach the fixing nip, based on image data of an image to be fixed, a conveyance speed of the print medium, and an estimated heat capacity of the print medium.
Abstract: A cleaning member includes a core and first and second foamed elastic layers wound around an outer peripheral surface of the core in a double-helical pattern. The compressive stress F1 of the first foamed elastic layer is greater than the compressive stress F2 of the second foamed elastic layer. The cleaning member cleans a member to be cleaned with the first and second foamed elastic layers in contact with a surface of the member to be cleaned.
Abstract: An image forming apparatus includes: a first image forming unit which forms a first image on a first recording medium with a first material that is not thermally decolorizable; a second image forming unit which forms a second image on a second recording medium with a second material that is thermally decolorizable; a fixing device which is on a common carrying path shared by the first recording medium and the second recording medium and fixes the first image to the first recording medium; and a controller which controls the fixing device so that a temperature of the fixing device is lower than a decolorizing temperature of the second material when the second recording medium reaches the fixing device.
Abstract: An image forming apparatus includes: a first photoconductor and a second photoconductor; an image carrier onto which a toner image formed on the first photoconductor and a toner image formed on the second photoconductor are transferred; and a controller that, when the toner image formed on the first photoconductor is transferred onto the image carrier, rotates the second photoconductor while keeping the second photoconductor spaced apart from the image carrier.
Abstract: A belt unit for forming a heating nip portion configured to heat a toner image in cooperation with a rotary member facing the belt unit, includes an endless belt, an nip forming member provided along a longitudinal direction of the endless belt on an inner side of the endless belt and configured to contact to an inner surface of the endless belt for forming the heating nip portion, a regulation member configured to regulate a position of the endless belt in the longitudinal direction, and a snap-fit unit formed of the nip forming member and the regulation member and configured to regulate the regulation member from being disengaged from the nip forming member.
Abstract: This invention concerns a cleaning unit which has a photosensitive body and a cleaning frame body supporting the photosensitive body, and which is attachable to and detachable from an apparatus main body of an image forming apparatus configured to form an image on a recording material. In the cleaning unit, which is installed in the apparatus main body so as to adjoin a developing unit including a developing roller that bears toner for developing an electrostatic image formed on the photosensitive body 1, engagement portions (bosses) are disposed on the cleaning frame body so as to protrude toward the developing unit side, and engage with engaged portions (insertion guide portions) disposed on the apparatus main body when the cleaning unit is attached to the apparatus main body.
Abstract: A heating unit includes a first rotatable member that generates heat; a second rotatable member that forms, in combination with the first rotatable member, a nip area through which sheets of different sizes pass one by one; a housing that supports the first and second rotatable members such that the first and second rotatable members are rotatable; an electronic component that is fixed to the housing and includes a portion that overlaps a smallest one of the sheets passing through the nip area in terms of a position in a long-side direction of the nip area; and an other member that is provided between the first rotatable member and the electronic component.
Abstract: An image heating apparatus includes a pressure removal mechanism including a camshaft, first and second cam portions being capable of placing a pressing mechanism at a first position, in which first and second rotatable members form the nip, and a second position, in which the pressing mechanism is moved against an urging force provided by a pressing spring at the first position, a first bearing portion, a second bearing portion, a first supporting portion supporting the first bearing portion, a second supporting portion supporting the first bearing portion, a driving mechanism configured to rotate the camshaft, and a regulating portion configured to regulate flexure of the camshaft by contacting the camshaft at a position between the first bearing portion and the second bearing portion with respect to the longitudinal direction of the camshaft, when the pressing mechanism is in the second position.
Abstract: In one example, a method for calibrating a position of a charge roller is described. The method may include a processor positioning a first end of a charge roller to a first plurality of index positions, determining a capacitance between the charge roller and a photoconductor imaging plate at each of the first plurality of index positions, determining a first index position of the first plurality of index positions with a greatest change in capacitance, and calibrating a position of the charge roller based upon the first index position.
October 29, 2018
Date of Patent:
August 13, 2019
HP Indigo B.V.
Shmuel Borenstain, Ami Halfon, Henryk Birecki, Seongsik Chang
Abstract: A fixing device includes a detection device. The detection device includes an actuator and a roller. The roller includes a sheet contact part. The roller is supported by the actuator in a movable manner between a first roller position and a second roller position. When the roller is positioned at the first roller position, the sheet contact part juts out from the actuator as viewed in an axial direction of the roller. When the roller is positioned at the second roller position, the sheet contact part overlaps with the actuator as viewed in the axial direction of the roller.
Abstract: A developer supply member according to an embodiment includes: a shaft with conductivity; and a conductive foam layer that is formed on a surface of the shaft. The conductive foam layer contains silicone rubber as a main component and includes a stress decay of 25% or less and a residual strain of 100 ?m or less.
Abstract: An image forming apparatus includes: a photosensitive drum; a driving roller that drives a transfer member; a facing roller facing the driving roller; a driver that drives one of the photosensitive drum, the driving roller, and the facing roller; and a hardware processor that: acquires carry-in fluctuation information of speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller when a sheet member is carried into the transfer member; detects carry-in fluctuation timing of the speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller that occurs when the sheet member is carried into the transfer member; predicts carry-out fluctuation timing of speed fluctuation of any one of the photosensitive drum, the driving roller, and the facing roller that occurs when the sheet member is carried from the transfer member; and performs feedforward control on the driver.
March 9, 2018
Date of Patent:
July 23, 2019
KONICA MINOLTA, INC.
Masahito Takano, Jun Onishi, Takashi Fujiwara
Abstract: An image forming apparatus includes: a transfer member that transfers a toner image to a continuous sheet, the transfer member having a lower hardness than a member opposed thereto with the continuous sheet therebetween when the continuous sheet is transported; and a moving unit that moves the transfer member in a direction intersecting the direction in which the continuous sheet is transported.
Abstract: An image forming system includes: an image former that performs an image forming process on a paper sheet, the image forming process including foil pressing, and a controller that controls the image former to perform the image forming process by selectively setting one of a first test print mode and a second test print mode when a test print mode is set, an amount of foil consumption at the image former being normal in the first test print mode, an amount of foil consumption at the image former being reduced in the second test print mode.