An image forming apparatus includes a sheet conveyance device; an image forming device including a sheet conveyance roller and a pressure roller; a memory; and a controller. The memory stores profile data indicating variation in conveyance amount in a circumferential direction due to eccentricity of the conveyance roller. The controller calculates, in intermittent conveyance processing, a correction value based on corresponding profile data for each of positions included in a width of an image to be formed in next image forming processing, the correction value being a difference between a predetermined conveyance amount and an actual conveyance amount; corrects a reference amount of rotation by a representative value of calculated correction values to calculate a corrected amount of rotation, the reference amount being an ideal amount of rotation of the conveyance roller that conveys a sheet by the predetermined conveyance amount; and rotates the conveyance roller by the corrected amount.

A dispenser for dispensing a flexible, rolled sheet material can include a housing and a supply of the sheet material supported within the housing for feeding the sheet material along a path defined through the housing. A feed roller can be rotatably mounted within the housing and have a body that engages the sheet material to pull the sheet material from the supply to dispense a selected amount of the sheet material therefrom. The dispenser also can include pressing rollers positioned adjacent the feed roller and biased to engage the sheet material between the pressing rollers and the feed roller, and a cutting mechanism arranged along the body of the feed roller that can have a cutting blade operatively connected to the body of the feed roller and actuated with rotation thereof to at least partially cut or perforate a selected portion of the sheet material.

A dispenser for dispensing a flexible, rolled sheet material can include a housing and a supply of the sheet material supported within the housing for feeding the sheet material along a path defined through the housing. A feed roller can be rotatably mounted within the housing and have a body that engages the sheet material to pull the sheet material from the supply to dispense a selected amount of the sheet material therefrom. The dispenser also can include pressing rollers positioned adjacent the feed roller and biased to engage the sheet material between the pressing rollers and the feed roller, and a cutting mechanism arranged along the body of the feed roller that can have a cutting blade operatively connected to the body of the feed roller and actuated with rotation thereof to at least partially cut or perforate a selected portion of the sheet material.

A roll feed includes a base body, a first tube roll having a rolling surface and a first bearing shaft, wherein the base body is configured to support the first tube roll and the first bearing shaft. The first bearing shaft and the first tube roll are configured to be detachably connected to each other for a rotationally fixed connection, wherein the base body is configured such that the first tube roll can be removed from the base body in an axial direction, wherein the axial direction is substantially parallel to an axis of rotation of the first tube roll.

An apparatus for a single-track or multitrack provision of web-like interleaved sheet material at a cutting region in which products supplied on one track or on multiple tracks are cut into slices and interleaved sheets are introduced which are cut off from the provided interleaved sheet material in the cutting region, comprising an output device which is configured to eject at least one material web into the cutting region, wherein the output device comprises at least one driven feed roll and at least one counter-unit which forms a feed gap for the material web together with the feed roll.

An apparatus for a single-track or multitrack provision of web-like interleaved sheet material at a cutting region in which products supplied on one track or on multiple tracks are cut into slices and interleaved sheets are introduced which are cut off from the provided interleaved sheet material in the cutting region, comprising an output device which is configured to eject at least one material web into the cutting region, wherein the output device comprises at least one driven feed roll and at least one counter-unit which forms a feed gap for the material web together with the feed roll.

A conveyance unit includes a feeding unit that feeds a medium from a roll, a conveyance roller pair that conveys the medium toward a printing unit, an intermediate roller pair that conveys, toward the conveyance roller pair, the medium fed by the feeding unit, a first driving unit that rotates a first driving roller, and a load changing unit that changes a pressing load acting between a second driving roller and a second driven roller. A control unit can execute a first control that controls the load changing unit such that the pressing load is a first pressing load when the first driving roller is rotated in an intermittent conveyance, and execute a second control that controls the load changing unit such that the pressing load is not generated when the rotation of the first driving roller is stopped in the intermittent conveyance.

A conveyance unit includes a feeding unit that feeds a medium from a roll, a conveyance roller pair that conveys the medium toward a printing unit, an intermediate roller pair that conveys, toward the conveyance roller pair, the medium fed by the feeding unit, a first driving unit that rotates a first driving roller, and a load changing unit that changes a pressing load acting between a second driving roller and a second driven roller. A control unit can execute a first control that controls the load changing unit such that the pressing load is a first pressing load when the first driving roller is rotated in an intermittent conveyance, and execute a second control that controls the load changing unit such that the pressing load is not generated when the rotation of the first driving roller is stopped in the intermittent conveyance.

A printing apparatus includes a conveyance unit, a printing unit, and a control unit. The conveyance unit includes a feeding unit, a conveyance roller pair, a feed driving unit, a first encoder, and a second encoder. The control unit is configured to execute a feed adjustment operation of adjusting tension of the medium fed from the feeding unit by controlling the feed driving unit such that the control unit executes the feed adjustment operation based on an output of the second encoder in a first period from a start of rotation of the conveyance roller pair until a specified time elapses and such that the control unit executes the feed adjustment operation based on an output of the first encoder in a second period after completion of the first period.

A printing apparatus includes a conveyance unit, a printing unit, and a control unit. The conveyance unit includes a feeding unit, a conveyance roller pair, a feed driving unit, a first encoder, and a second encoder. The control unit is configured to execute a feed adjustment operation of adjusting tension of the medium fed from the feeding unit by controlling the feed driving unit such that the control unit executes the feed adjustment operation based on an output of the second encoder in a first period from a start of rotation of the conveyance roller pair until a specified time elapses and such that the control unit executes the feed adjustment operation based on an output of the first encoder in a second period after completion of the first period.