A sheet conveying apparatus includes: a first pair of conveying rollers for conveying a sheet; a second pair of conveying rollers against which the leading edge of the sheet conveyed by the first pair of conveying rollers is hit and which conveys the sheet together with the first pair of conveying rollers by rotating after a loop is formed on the sheet; a separating portion for separating the first pair of conveying rollers; a first conveyance path for guiding the sheet; a second conveyance path which is a path different from the first conveyance path and guides the sheet; and a controller which changes a separation timing at which the first pair of conveying rollers is separated after the loop is formed on the sheet, depending on whether the sheet is guided by the first conveyance path or by the second conveyance path.

A sheet conveying apparatus includes an abutment member against which a leading end of a sheet conveyed by a conveying roller abuts, a phase determiner that determines a rotation phase of a rotor of a motor driving the conveying roller, a controller that controls the motor by controlling the value of a torque current component and the value of an excitation current component so that a difference between an instruction phase and the rotation phase is decreased, and a torque determiner that determines load torque exerted on the rotor. The controller continues driving of the motor if the load torque is lower than predetermined torque in a state in which the leading end of the sheet abuts against the abutment member to deflect the sheet and stops the driving of the motor if the load torque is higher than or equal to the predetermined torque.

An inkjet printer includes a controller configured to perform an intermittent conveyance process including controlling a conveyor to intermittently convey a preceding sheet, an image recording process including controlling a recording head to perform image recording for each single pass on the preceding sheet while controlling a carriage moving mechanism to move a carriage with the recording head mounted thereon over each single pass in a direction along a scanning direction, a remaining-pass calculating process including calculating a count of remaining passes to be recorded on the preceding sheet, and a feeding process including, in response to the calculated count of the remaining passes being a particular number, controlling a feeder to start feeding a subsequent sheet at a point of time when a first particular period of time elapses from a next timing to start conveyance of the preceding sheet in the intermittent conveyance process.

A sheet conveying device, which is incorporated in an image forming apparatus, includes a first detector to detect an angle deviation of a recording medium to a sheet conveying direction, a second detector to detect a lateral shift of the recording medium to a width direction, a third detector to detect at least one of the angle deviation and the lateral shift after correction of the angle deviation detected by the first detector and the lateral shift detected by the second detector, and a rotary body to perform a primary movement by (1) rotating in the sheet conveying direction and returning to a reference position and by (2) moving in the width direction and returning to the reference position, and a secondary movement by performing at least one of (1) and (2) after the primary movement.

An image-forming apparatus contains an image-forming portion, a first conveying portion that is arranged at an upstream side of the image-forming portion along a sheet conveying direction, a second conveying portion that is arranged at an upstream side of the first conveying portion along the sheet conveying direction and a control portion. The control portion controls the first conveying portion to move a pair of registration rollers along a direction that is orthogonal to the sheet conveying direction while the pair of registration rollers nips the sheet when conveying the sheet to the image-forming portion. The control portion controls the second conveying portion to move one of the pair of conveying rollers along the direction that is orthogonal to the sheet conveying direction while the pair of conveying rollers does not nip the sheet.

A sheet transport device includes a transport path along which a sheet is transported in one direction, the sheet being transported with a corner at a leading end of the sheet being located on a first lateral side of the path, a sheet rotating section that rotates the sheet so as to increase an angle of the sheet and so as to orient the leading end, a sheet moving section that moves the sheet toward the first lateral side, and plural sheet butting portions that are arranged side-by-side in the one direction, on the first lateral side, the sheet butting portions allowing the moved sheet to be butted thereagainst to orient the sheet in the one direction. When the sheet is butted against the sheet butting portions to be oriented in the one direction, the corner is located at a position where no sheet butting portions are provided.

A sheet feeder is provided. The sheet feeder includes a roller to feed a sheet, a motor to rotate the roller, and a motor controller to control rotation of the motor by a feedback control. The motor controller detects a condition of the sheet based on a value acquired in the feedback control at the time a load is applied from the sheet to the roller, while performing a stop control to stop the roller at a designated stop position. The stop control is performed after the motor is rotated in a direction opposite to a direction of feed of the sheet.

A cover feeder for providing book covers to a production unit of a book completion line includes a first receiving device for book covers of the same format, which can be positioned individually, in an overlapping flow and/or in a stack thereon, and a second receiving device that is arranged upstream of the first receiving device for a stack of book covers having different formats. The cover feeder includes a control unit to which information can be transmitted relating to the format and sequence of book covers in the stack of book covers having different formats, and a laterally adjustable centering device connected to the control unit for a defined lateral displacement and/or aligning of respectively one book cover that is separated out from the second receiving device and is positioned on the first receiving device.

A cover feeder for providing book covers to a production unit of a book completion line includes a first receiving device for book covers of the same format, which can be positioned individually, in an overlapping flow and/or in a stack thereon, and a second receiving device that is arranged upstream of the first receiving device for a stack of book covers having different formats. The cover feeder includes a control unit to which information can be transmitted relating to the format and sequence of book covers in the stack of book covers having different formats, and a laterally adjustable centering device connected to the control unit for a defined lateral displacement and/or aligning of respectively one book cover that is separated out from the second receiving device and is positioned on the first receiving device.

A belt control device includes a holder to movably support a rotation shaft of at least one of the plurality of rotators around which a belt is looped, a contact part to contact an end of the belt as the belt moves in a belt width direction, a stationary frame part disposed facing the holder, a shaft moving device to move the rotation shaft as the belt moves, and at least one projection disposed on one of the stationary frame part and the holder. The projection is to contact the other of the stationary frame part and the holder. The projection includes a long projection having a contact portion extending in a shaft moving direction in which the rotation shaft moves, and the contact portion is contactable with the other of the stationary frame part and the holder.