G03G15/16

IMAGE FORMING APPARATUS

An image forming apparatus includes: a fixing cylinder that is rotatably supported, that has a groove formed in an outer portion thereof in a rotational radial direction thereof, and that causes an image transferred to a recording medium to be fixed to the recording medium when the recording medium passes along an outer surface of the fixing cylinder in the rotational radial direction; a delivery cylinder that is rotatably supported; a circulating member that is loop-shaped and wrapped at least around the fixing cylinder and the delivery cylinder; plural holding members configured to hold the recording medium when the recording medium passes around the delivery cylinder toward the fixing cylinder, the holding members being supported by the circulating member such that the holding members are arranged in a length direction of the circulating member with predetermined intervals therebetween, each holding member being disposed in the groove when the holding member passes along the outer portion of the fixing cylinder; and a pressure unit that is rotatably supported and that causes the recording medium to pass between the pressure unit and the fixing cylinder while a pressure is applied between the pressure unit and the fixing cylinder, the pressure unit coming into contact with an end portion of the groove in a rotation direction of the fixing cylinder before or after a period from when one of the holding members starts a holding operation for holding the recording medium to when the holding operation is completed.

IMAGE FORMING APPARATUS
20230118753 · 2023-04-20 ·

An image forming apparatus includes an image forming portion, a belt unit including a cleaning unit and an opposing roller, and a swinging mechanism. The swinging mechanism includes a swingable member which is provided in a position different from a rotation center of the opposing roller while holding the opposing roller and the cleaning unit without changing a relative positional relationship between the opposing roller and the cleaning unit and which is swingable about a swing axis.

Image forming apparatus

An image forming apparatus is capable of being attached with a toner supply container. The toner supply container stores a toner that is to be supplied to a developing portion. An attachment location of the toner supply container is below a light scanning portion in a vertical direction.

Laminate and conductive roller
11630401 · 2023-04-18 · ·

Providing a laminate having an excellent adhesiveness between a base layer and a surface layer while having a good flexibility. In order to solve the aforementioned problems, the laminate of the present disclosure comprises at least a base layer, an intermediate layer and a surface layer, wherein a base layer composition contains an urethane resin, an intermediate layer composition contains an energy ray curable resin having (meth)acryloyl group in a molecule thereof, and, a non-UV curable resin having only isocyanate group as reactive functional group, and a surface layer composition contains a UV curable resin having the (meth)acryloyl group in the molecule.

IMAGE FORMING APPARATUS WITH CHANGE ROLLER AND FLYWHEEL
20230062618 · 2023-03-02 · ·

An image forming apparatus includes: an image carrier body to be transported; an image forming unit that forms an image on the image carrier body; a change roller that is in contact with an inner peripheral surface of the image carrier body so as to be rotatable around a rotation axis and that is capable of changing an angle of the rotation axis with respect to a width direction of the image carrier body; a flywheel provided at the change roller; and a driving mechanism that applies a driving force for changing an angle of the rotation axis with respect to the width direction to an applied portion that moves together with the change roller. A direction of the driving force applied to the applied portion by the driving mechanism is opposite to a direction in which the applied portion moves due to gravity acting on the flywheel.

IMAGE FORMING APPARATUS
20230064793 · 2023-03-02 · ·

An image forming apparatus includes: a sensing portion configured to sense a current that flows through a secondary transfer member, or a voltage that has been applied; and a controller configured to perform an operation to determine a transfer voltage to be applied to the secondary transfer member in secondary transfer, on a basis of a result of sensing performed by the sensing portion at a time when a test voltage has been applied to the secondary transfer member in non-image formation, and the controller performs, in the operation, controlling a first application portion and a second application portion not to apply the voltage to a primary transfer member during a period of applying the test voltage to the secondary transfer member.

IMAGE FORMING APPARATUS

An image forming apparatus includes at least one upper image forming unit in which an image holding unit is disposed above a transfer unit in such a manner as to face the transfer unit with a transfer medium, which moves in a predetermined direction, interposed between the image holding unit and the transfer unit and at least one lower image forming unit in which an image holding unit is disposed below a transfer unit in such a manner as to face the transfer unit with the transfer medium interposed between the image holding unit and the transfer unit, the transfer unit of the upper image forming unit and the transfer unit of the lower image forming unit each including a transfer member that extends in a width direction crossing the direction of movement of the transfer medium and that is brought into contact with the transfer medium and a pressing unit that presses the transfer member toward the image holding unit, and the pressing units being set in such a manner that a pressing force that is applied by one of the pressing units to the transfer member of the upper image forming unit is larger than a pressing force that is applied by another one of the pressing units to the transfer member of the lower image forming unit in a direction that makes pressing loads of the transfer members against the image holding units equal.

TRANSFER DEVICE AND IMAGE FORMING APPARATUS

A transfer device includes a transfer drum that rotates in conjunction with a fixing roller, a transfer belt that transfers an image onto a medium while rotating along with the transfer drum in a state where the medium is nipped between the transfer belt and the transfer drum, a pressing member that is disposed in a space enclosed by the transfer belt, and a switching unit that moves the pressing member and switches between a pressed state in which the transfer belt is pressed against the transfer drum and a separated state in which the transfer belt is separated from the transfer drum.

Image forming apparatus including sheet member containing flow of exhaust air
11630417 · 2023-04-18 · ·

An image forming apparatus includes an image forming portion, a transfer belt, a secondary transfer portion, a cleaning member contacting a surface of the transfer belt for cleaning the surface of the transfer belt, a fixing device, an exhausting device, a duct portion and a sheet member. The sheet member is provided on the exhausting device so as to project toward the transfer belt from the exhausting device, the sheet member being opposed to transfer belt and separated by a predetermined space downstream of the transfer portion and upstream of the cleaning member with respect to a rotational direction of the transfer belt, and being configured to prevent air flow between the exhausting device and the transfer belt from flowing downstream with respect to the rotational direction.

IMAGE FORMING APPARATUS WITH MOVING MECHANISM TO MOVE TENSION ROLLER WITH RESPECT TO AN ENDLESS BELT
20230060381 · 2023-03-02 · ·

An image forming apparatus includes: an annular endless belt; a drive roller, around which the endless belt is wound and which moves the endless belt; a first tension roller, around which the endless belt moved by the drive roller is wound; a biasing mechanism connected to the first tension roller and including an elastic member that applies a tension to the endless belt via the first tension roller; a second tension roller, around which the endless belt moved by the drive roller is wound at a different position from the first tension roller; and a moving mechanism connected to the second tension roller to move the second tension roller in directions closer to and away from the endless belt. A range of adjustment of a circumferential length of the endless belt by the moving mechanism is larger than a range of adjustment of the circumferential length of the endless belt by the biasing mechanism.