A sheet conveyance apparatus includes a rotary drive member configured to rotate by receiving transmission of driving force from a driving source, a driven rotary member arranged with a predetermined distance in a sheet conveyance direction from the rotary drive member, an endless belt member supported on the rotary drive member and the driven rotary member, and configured to be rotated by a rotation of the rotary drive member, and a guide member configured to guide a sheet conveyed by the belt member. The guide member is mounted to a shaft configured to support the rotary drive member, and the rotary drive member is supported on the shaft in a rotatable manner with respect to the shaft.

A sheet conveyance apparatus includes a rotary drive member configured to rotate by receiving transmission of driving force from a driving source, a driven rotary member arranged with a predetermined distance in a sheet conveyance direction from the rotary drive member, an endless belt member supported on the rotary drive member and the driven rotary member, and configured to be rotated by a rotation of the rotary drive member, and a guide member configured to guide a sheet conveyed by the belt member. The guide member is mounted to a shaft configured to support the rotary drive member, and the rotary drive member is supported on the shaft in a rotatable manner with respect to the shaft.

A method for removing outer layer of rollstock includes: first step of cutting rollstock's outermost circumferential film in a first cut portion, the rollstock formed by a film sheet rolled from base end to tip end and the tip end temporarily fixed to an outer circumferential surface; second step of cutting the film in a second cut portion closer to the base end than the first cut portion, a length from the tip end to the second cut portion being equal to or more than one round of the rollstock's outermost circumference; and step of discarding a first cut-film piece from the first cut portion to the tip end and a second cut-film piece from the first cut portion to the second cut portion by drawing the first and second pieces with a drawing device while driving an unwinding roller mounted with a hollow portion of the rollstock to rotate.

A sheet folding device, which is included in an image forming system and uses a sheet folding method, includes first and second drive motors, a first sheet conveyor driven by the first drive motor and configured to receive and convey a sheet toward a downstream side of a sheet conveying direction, a second sheet conveyor driven by the second drive motor and configured to receive the sheet conveyed from the first sheet conveyor and to convey the sheet to the downstream side of the sheet conveying direction, and a controller configured to fold the sheet to a predetermined folding length set according to an amount of conveyance of the sheet by the second sheet conveyor while the sheet is being held between the first and second sheet conveyors, and to perform a feedback control with an integral gain to the second drive motor.

A sheet folding device, which is included in an image forming system and uses a sheet folding method, includes first and second drive motors, a first sheet conveyor driven by the first drive motor and configured to receive and convey a sheet toward a downstream side of a sheet conveying direction, a second sheet conveyor driven by the second drive motor and configured to receive the sheet conveyed from the first sheet conveyor and to convey the sheet to the downstream side of the sheet conveying direction, and a controller configured to fold the sheet to a predetermined folding length set according to an amount of conveyance of the sheet by the second sheet conveyor while the sheet is being held between the first and second sheet conveyors, and to perform a feedback control with an integral gain to the second drive motor.

There is provided a feed apparatus including a support unit, a feed roller, a swingable arm to support the feed roller, a guide unit, a movable member movable to a retracted position and a protruding position at which the movable member can abut against the sheet supported by the support unit, a driving source, driving transmission units; and a contact-separating mechanism to move the feed roller to a separated position and an abutment position at which the feed roller abuts against the sheet supported by the support unit. In a state in which the movable member is the protruding position and the feed roller is the separated position, a time required to start feeding of the sheet by the feed roller moved from the separated position to the abutment position is longer than a time required to shift the movable member from the protruding position to the retracted position.

There is provided a feed apparatus including a support unit, a feed roller, a swingable arm to support the feed roller, a guide unit, a movable member movable to a retracted position and a protruding position at which the movable member can abut against the sheet supported by the support unit, a driving source, driving transmission units; and a contact-separating mechanism to move the feed roller to a separated position and an abutment position at which the feed roller abuts against the sheet supported by the support unit. In a state in which the movable member is the protruding position and the feed roller is the separated position, a time required to start feeding of the sheet by the feed roller moved from the separated position to the abutment position is longer than a time required to shift the movable member from the protruding position to the retracted position.

A sheet processing apparatus is described. The sheet processing apparatus includes a housing section, a conveyance mechanism and a controller. The housing section accommodates a sheet. The conveyance mechanism conveys the sheet accommodated in the housing section to a predetermined position at the downstream side in a sheet conveyance direction. The controller controls the conveyance mechanism to remove a needle-free binding section of a sheet bundle if a conveyance jam of the sheet occurs.

A sheet processing apparatus is described. The sheet processing apparatus includes a housing section, a conveyance mechanism and a controller. The housing section accommodates a sheet. The conveyance mechanism conveys the sheet accommodated in the housing section to a predetermined position at the downstream side in a sheet conveyance direction. The controller controls the conveyance mechanism to remove a needle-free binding section of a sheet bundle if a conveyance jam of the sheet occurs.

A feeder includes a pressing section that presses a medium after a feeding force is applied on the medium in a direction in which a leading edge of the medium set in a setting section in a feeding direction abuts on an abutment section during feeding of the media by a feed roller.