Abstract: A conductive roll includes a support member, an elastic layer disposed on an outer peripheral surface of the support member, a surface layer disposed on an outer peripheral surface of the elastic layer, and an intermediate layer disposed between the elastic layer and the surface layer, the intermediate layer having a Poisson ratio of 0.40 or less.
Abstract: A static elimination device includes: a first static elimination member that makes contact with a medium that is transported; a second static elimination member arranged such that the medium is inserted between the first static elimination member and the second static elimination member; and a power source that applies a voltage to at least one of the first static elimination member or the second static elimination member, in which at least one of the first static elimination member and the second static elimination member has an elastic body.
Abstract: Disclosed is a layer transfer device for transferring a transfer layer onto a toner image formed on a sheet, in which a replacement of a film cartridge is easy for a user. The layer transfer device includes a housing, a film cartridge, and a holder. The film cartridge includes a supply reel including a supply shaft on which a multilayer film including a supported layer including a transfer layer, and a supporting layer supporting the supported layer is wound, and a take-up reel including a take-up shaft on which to take up the multilayer film. The holder supports the film cartridge, and is installable into and removable from the housing while supporting the film cartridge.
Abstract: An image forming device, including: a housing; a drawer movable between an inside position at which the drawer is located inside the housing and an outside position at which the drawer is located outside the housing; a drum cartridge including a photoconductive drum and a developer roller and mountable on the drawer; a toner cartridge storing toner to be supplied to the developer roller and mountable on the drawer, wherein the drawer includes a first guide that guides the toner cartridge in mounting the toner cartridge on the drawer, and wherein the drum cartridge includes a second guide connected to the first guide in a state in which the drum cartridge is mounted on the drawer, the second guide being configured to guide the toner cartridge in mounting the toner cartridge on the drawer in the state in which the drum cartridge is mounted on the drawer.
Abstract: The crystallinity of a thermoplastic resin is 8% or more and 25% or less, the average primary particle size of carbon black is 10 nm or more and 30 nm or less, the content of the carbon black is 15.0 parts by mass or more and 30.0 parts by mass or less with respect to 100 parts by mass of an intermediate transfer belt, and (Li+Lo+Lc)/3?100 nm, where Li, Lo, and Lc are values of an L-function indicating a dispersibility of the carbon black with respect to the thermoplastic resin in an inner peripheral surface region of the intermediate transfer belt, in an outer peripheral surface region, and in a central region that is a central portion of the intermediate transfer belt in a thickness direction of the intermediate transfer belt, respectively.
December 7, 2021
Date of Patent:
November 1, 2022
Canon Kabushiki Kaisha
Midai Suzuki, Akeshi Asaka, Koji Sato, Noriaki Kobayashi, Megumi Uchino, Akira Okano, Toshiyuki Yoshida, Naoko Kasai, Atsushi Hori
Abstract: A developing device includes a developing container, a developer carrier, a seal member, and a pair of pressing members. The developing container has an opening. The seal member includes a contact end part that makes contact with an entire region of an outer circumferential surface of the developer carrier in its rotary shaft direction and is one of end edges of the seal member in a longitudinal direction thereof on a side near the developer carrier and an interposed end part that is interposed between each of both end parts of the developer carder and a corresponding one of the pressing members and is an end edge of the seal member orthogonal to the contact end part, and a chamfered shape is formed at a corner between the contact end part and the interposed end part.
Abstract: An endless belt includes a metal substrate, and a heat-resistant resin layer that is disposed as an innermost layer on an inner peripheral surface of the metal substrate and that contains a resin and a thermally conductive filler having an aspect ratio of 20 or more. In the heat-resistant resin layer, an orientation ratio of the thermally conductive filler with respect to a circumferential direction of the endless belt is 20% or more.
Abstract: A disclosed fixing device includes a pressing member; an endless tubular fixing member disposed opposite to the pressing member; a heating source configured to heat the fixing member; a nip forming member disposed opposite to the pressing member via the fixing member to form a nip portion; and a supply unit configured to supply lubricant to a portion of an inner surface of the fixing member, the portion facing the nip forming member, wherein the nip forming member includes a contact portion that contacts the inner surface of the fixing member, the contact portion includes a guide portion for guiding lubricant, and the guide portion is formed by extending obliquely from opposite ends in a width direction toward a center of the fixing member as the contact portion moves from upstream to downstream in a rotational direction of the fixing member.
Abstract: In an image forming apparatus, a cleaning blade, disposed on a downstream side of a transfer roller in a rotation direction of an image carrier, removes toner remaining on the image carrier after transfer of a toner image to an intermediate transfer member. After completion of an image forming operation, a controller causes the transfer roller to separate from the intermediate transfer member, cause the developing device to form on the image carrier a toner band to be supplied to the cleaning blade, and cause rotation of the image carrier to stop such that at least a part of the toner band formed on the image carrier stops within a section from a first position facing the transfer roller to a second position facing the cleaning blade in the rotation direction.
Abstract: An image forming apparatus includes a housing, a drawer, an operation panel, and a sensor. The housing includes a first side wall having a first opening, and a second side wall having a vent and extending in a direction crossing the first side wall. The drawer supports a cartridge. The drawer is movable through the first opening between an inner position at which the drawer is accommodated in the housing and an outer position at which a part of the drawer is exposed to outside the housing. At least part of the operation panel protrudes from an outer surface of the second side wall. The sensor is arranged in the housing between the drawer and the second side wall. The sensor is configured to detect at least temperature or humidity of ambient air taken in through the vent.
Abstract: A developing cartridge including a casing, a developing roller, a developing roller gear, a gear cover, a first boss, and a pressure receiving surface. The developing roller is positioned closer to a first end portion of the casing than to a second end portion of the casing in a first direction. The first boss extends in a second direction and is movable together with the casing. The first boss is positioned away from the developing roller in the first direction by a first distance and also positioned away from the developing roller in a third direction. The pressure receiving surface is positioned further from the developing roller than the first boss is from the developing roller in the third direction. The pressure receiving surface is positioned away from the developing roller by the first distance or by a second distance shorter than the first distance.
Abstract: An image forming apparatus includes: an image carrier having a first rotation axle, a charging roller having a second rotation axle, a conductive member to contact a surface of the image carrier, a gap size acquisition device, and a gap adjustment device. The charging roller is disposed adjacent to the image carrier in a non-contact manner across a gap to charge the image carrier. The gap size acquisition device acquires a size of the gap. The gap adjustment device adjusts a distance between the first rotation axle and the second rotation axle based on information from the gap size acquisition device to maintain the size of the gap within a predetermined range.
June 22, 2020
Date of Patent:
September 27, 2022
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
Abstract: A metal frame of an image forming apparatus including a first support which includes a first metal plate; a second support; and a third support which includes a second metal plate, wherein either the first metal plate or the second metal plate includes a through-hole formed in a surface portion, the other of the first metal plate and the second metal plate includes an insertion portion, a first facing portion configured to face a first surface of the surface portion, and a second facing portion configured to face a second surface of the surface portion, and wherein in the plate thickness direction of the surface portion, a distance between a tip portion of the insertion portion of the one metal plate and the second facing portion is smaller than a plate thickness of the surface portion of the other metal plate.
Abstract: A cartridge includes a casing including a toner storage chamber storing toner and a toner discharge chamber having an outlet, a conveyance member conveying the toner from the toner storage chamber to the toner discharge chamber, an action member attached to the conveyance member and repeating an action of shifting between an entering state of entering the outlet and a retraction state of retracting from the outlet, and a pump expanding and contracting to be shifted between a first state and a second state in which the internal space is smaller in volume than in the first state, the pump putting air into the toner discharge chamber by being shifted from the first state to the second state, thereby discharging the toner from the toner discharge chamber through the outlet, and the pump taking in air by being shifted from the second state to the first state.
Abstract: An image forming apparatus includes a photosensitive drum, an LED unit, and a housing. The LED unit is configured to expose the photosensitive drum. The LED unit has a light emitting surface. The housing includes a discharge portion and a discharge tray. The discharge portion has a discharge opening configured to discharge a sheet. The sheet discharged from the discharge opening is placed on the discharge tray. The discharge tray has a cleaning opening for cleaning the light emitting surface of the LED unit. The LED unit is configured to move between: a first position at which the LED unit exposes the photosensitive drum; and a second position at which the light emitting surface is closer to the cleaning opening than a state where the LED unit is located at the first position.
Abstract: Described herein is a process for heat transfer printing, the process comprising: electrostatically printing a transparent release composition onto a transfer material to form a release layer disposed on the transfer material; electrostatically printing an electrostatic ink composition on the release layer to form an image layer disposed on the release layer; contacting a thermoplastic film with the image layer; contacting the thermoplastic film with a target substrate under conditions such that the thermoplastic film adheres to the target substrate and the release layer is softened; and separating the target substrate and the transfer material such that the thermoplastic film, image layer and release layer are transferred to the target substrate. A heat transferrable printed image is also described herein.
October 3, 2018
Date of Patent:
September 13, 2022
Hewlett-Packard Development Company, L.P.
Inna Tzomik, Dima Libster, Katty Noorany, Albert Teishev
Abstract: A developing device includes a developing container, a developer carrier, a seal member, and a pair of pressing members. The developing container has an opening. The seal member includes a contact end part, a first blocking part, and an interposed end part. Each of the pressing members has a pressing surface in which a cutout recess is formed. The developing container includes a second blocking part that is adjacent to each end part of the first blocking part in a rotary shaft direction and protrudes upward. The interposed end part is located at such a position as to overlap the cutout recess with respect to a circumferential direction, and the second blocking part is located at such a position as to overlap the cutout recess with respect to the rotary shaft direction.
Abstract: A conductive roll includes a support member, an elastic layer disposed on an outer peripheral surface of the support member, and a top layer disposed on an outer peripheral surface of the elastic layer. In a case where a pushing amount of a metal roll into the conductive roll is 1.7%, the metal roll having an outer diameter identical to an outer diameter of the conductive roll, a shrinkage rate of a surface of the conductive roll with respect to the outer diameter of the conductive roll is equal to or more than 5%.
Abstract: A rotatable endless fixing belt configured to fix a toner image borne on a recording material includes a base body and a polyimide layer. The polyimide layer is formed on an inner-circumferential-surface of the base body and configured to slide on a backup member in contact with the backup member. The polyimide layer includes filler having shape anisotropy. An orientation ratio of the filler inclined with respect to a generating line of the fixing belt by a predetermined angle or less is smaller in a first area than in a second area in a cross section of the fixing belt taken along the generating line of the fixing belt, the first area being an area formed in an inner-circumferential-surface side of the polyimide layer in a thickness direction, the second area being an area formed in a base-body side of the polyimide layer in the thickness direction.
Abstract: A roller used in a fixing device includes a rubber layer including a plurality of void portions, pore passage portions connecting the void portions, and a filler, wherein an aspect ratio RA of the filler is 2.5?RA?215, and a linear expansion coefficient of the rubber layer is less than or equal to 400×10?6/K.