An image forming apparatus includes an image forming portion, a fixing portion configured to heat and press the sheet conveyed from the image forming portion while nipping and conveying the sheet by a first nip portion to fix toner image to the sheet, a folding portion configured to fold the sheet, and a bonding portion configured to heat and press the sheet folded by the folding portion while nipping and conveying the sheet by a second nip portion to bond the sheet by powder adhesive. A peak value of pressure that the second rotary member pair applies to the sheet in the second nip portion is greater than a peak value of pressure that the first rotary member pair applies to the sheet in the first nip portion.

An image forming apparatus controls the number of rotations of a photosensitive drum based on information related to the use of the photosensitive drum and a suspension time in a rotation operation of rotating the photosensitive drum after a lapse of the suspension time between a first image forming operation of forming an image on a transfer material and a second image forming operation performed after the first image forming operation.

A power supply apparatus including a switching element configured to supply or cut off electric power to a primary coil of a transformer by a switching operation, and a control unit configured to control the switching operation. The control unit is configured to perform intermittent control of repeating a switching period for performing the switching operation and a stop period for stopping the switching operation. In the switching period, when the control unit performs the switching operation a predetermined number of times, the switching period is transitioned to the stop period. In the stop period, when the control unit determines that a voltage output from a secondary coil of the transformer falls below a target voltage, the stop period is transitioned to the switching period. The control unit is configured to change the switching operation based on a length of the stop period.

A method for reducing artifacts in an electrophotographic printing system includes receiving a print job including image data for a set of pages. The electrophotographic printing system is used to print a block of pages from the print job to provide corresponding printed pages. The image data for the block of pages is analyzed to determine a cross-track image profile for each page in the block of pages. Image data for a compensation image and a number of compensation images are determined, wherein the compensation image has a cross-track image profile which has an inverted shape relative to an average of the cross-track image profiles for the block of pages. The printing of the compensation images reduces image burn-in artifacts which result from the printing of the block of pages.

A sheet folding apparatus includes: a rotor having a first peripheral surface and a second peripheral surface with a radius smaller than that of the first peripheral surface and configured to convey a sheet; and a guide member configured to be movable between a first position where it guides a sheet being conveyed by the rotor and a second position retracting from the first position. The guide member is disposed so as to move from the second position to the first position while passing within the rotation locus of the first peripheral surface of the rotor.

A recording apparatus includes a conveyance unit, a conveyance path, a double-sided conveyance path, and first and second charge eliminators. The conveyance unit conveys a recording medium having first and second surfaces in a first direction through the conveyance path to a recording area where recording is performed by a recording unit on the first surface. The recording medium then passes through the double-sided conveyance path before recording is performed on the second surface. The first charge eliminator eliminates charges from the first surface and is disposed at a position downstream of a junction between the conveyance path and the double-sided conveyance path in the first direction and upstream of the recording area in the first direction. The second charge eliminator eliminate charges from the second surface and is disposed downstream of the junction in the first direction and upstream of the recording area in the first direction.

A sheet transport device includes a transport guide for guiding, along its transport surface, a sheet in a transport direction, a first transport roller pair, a second transport roller pair, a skew roller pair, a reference wall, and an actuator. The skew roller pair alone transports, in a skewed manner toward an end of the transport surface in a width direction orthogonal to the transport direction, the sheet spaced from the first transport roller and the second transport roller. The reference wall is positioned at the end of the transport surface in the width direction and extends along the transport direction. The actuator is disposed downstream of the skew roller pair and upstream of the second transport roller pair in the transport direction and between the end and a center of the transport surface in the width direction.

According to one embodiment, provided is a support device including a base member, a pair of tip members, and a pair of lower end members. The base member is configured to be foldable at an intermediate portion in a width direction, the base member having a plate shape. The pair of tip members are present in both end portions of the base member in the width direction and have a configuration where a pair of plate materials are disposed to be tapered. The pair of lower end members have a plate shape, are present in a lower end portion of the base member on both sides of the base member in a thickness direction, and form a substantially right angle with the base member.

An image forming apparatus includes: an image carrier that carries an image developed by a developer; an exposure part that has plural light-emitting parts that are shifted from one another so as to face the image carrier and in each of which plural light-emitting elements are aligned and forms an electrostatic latent image on the image carrier by exposing the image carrier to light; and plural density detection parts that are disposed at positions corresponding to substantially central positions of the plural light-emitting parts and at positions corresponding to end portions closer to end portions of the image carrier among end portions of two light-emitting parts disposed close to the end portions of the image carrier among the plural light-emitting parts and detect a density of an image obtained by developing the electrostatic latent image on the image carrier.

Disclosed is a print offset determining apparatus. The apparatus is to receive information indicative of a position of an imaging element relative to a binary ink developer when the binary ink developer comes into contact with the imaging element and determine an offset between the position of the imaging element and a reference position of the imaging element relative to the binary ink developer.