摘要:
A belt transporting device for circulatingly transporting an endless belt, which is in use with an image forming apparatus, such as copying machine or a printer. The belt transporting device includes a plurality of tension rolls, an endless belt laid on the tension rolls, the endless belt having a belt-end edge part protruding from an end of one of the tension roll and a guide member provided in the vicinity of the endless belt. The guide member comes in contact with the belt-end edge part so as to bend the belt-end edge part in a tapering-off direction. The guide member regulates the shape of the belt-end edge part so that a rotary peripheral length of the belt-end edge part becomes smaller than that of an area where a rear side of the endless belt is in contact with the tension roll.
摘要:
In an image forming apparatus provided with an image transporting belt that holds an image directly or indirectly and is laid on a plurality of tension rolls thereby to move circularly, and a sub-unit having a rotary roll that comes into contact with this image transporting belt and is rotationally driven by a drive section, the drive section includes a drive source, and an elastic drive power transmitting member that transmits drive power from the drive source and absorbs difference in peripheral speed produced between the image transporting belt and the rotary roll. The drive section includes a slip transmission member that engages with the elastic drive power transmitting member and slips under a condition over a peripheral speed difference absorbable range of the elastic drive power transmitting member.
摘要:
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.
摘要:
In an image forming apparatus for transferring an image formed on a photoreceptor 1 onto a recording medium 3 through an intermediate transfer member 2, one of the photoreceptor 1 and the intermediate transfer member 2 is formed like a drum, the other of the photoreceptor 1 and the intermediate transfer member 2 is formed like a belt, which is wound on a plurality of tension rolls 4, and the following relationship is satisfied: ∑ n = 3 N a n
摘要:
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.
摘要:
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.
摘要:
A conveyance apparatus includes: a conveyance member that conveys images formed by plural image forming parts or a recording medium on which the images formed by the plural image forming parts are transferred; and a driving unit that drives the conveyance member via a frictional force in at least two positions.
摘要:
An image forming apparatus includes an image forming unit detachably attached to an image forming apparatus. The image forming unit includes a first unit that accommodates a first process device, and a second unit that is detachable from the first unit and accommodates a second process device with a longer life than the first process device.
摘要:
An image forming apparatus includes: an image output unit that outputs an image; and an image processing unit that converts an input image signal to an output image signal and outputs the image signal to the image output unit, the image output unit having: an image carrier that carries at least a latent image; plural developer containers containing mutually different color developers used for developing the latent image carried on the image carrier; and a transport member for repeated operations of attachment of the developer contained in one of the plural developer containers, transport of the attached developer to the image carrier, and removal of remaining developer, and the image processing unit having a change unit that changes a color conversion characteristic of an image signal in correspondence with color mixture of the mutually different color developers.