A medium transport apparatus includes: a feed unit feeds a medium to a transport direction; a first detection unit disposed upstream of the feed unit, and detects movement of the fed medium; a second detection unit disposed downstream of the first detection unit and detects an inclination of the medium; and a control unit detects the inclination of the medium based on a signal of the second detection unit and stop transfer of the medium when the inclination exceeds a threshold value, and the plurality of the threshold values have a relationship such that when a medium length in the transport direction is a second length being shorter than a first length, a relatively higher value is produced than in a case in which the medium length is the first length, and the control unit selects a threshold value based on a detection value of the first detection unit.

A medium transport apparatus includes: a feed unit feeds a medium to a transport direction; a first detection unit disposed upstream of the feed unit, and detects movement of the fed medium; a second detection unit disposed downstream of the first detection unit and detects an inclination of the medium; and a control unit detects the inclination of the medium based on a signal of the second detection unit and stop transfer of the medium when the inclination exceeds a threshold value, and the plurality of the threshold values have a relationship such that when a medium length in the transport direction is a second length being shorter than a first length, a relatively higher value is produced than in a case in which the medium length is the first length, and the control unit selects a threshold value based on a detection value of the first detection unit.

In the first mode, the control unit controls the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a first time since the detection portion detected a leading edge of the sheet, and position the rotary feeding member at the first position when a trailing edge of the sheet passes through the separation nip. In the second mode, the control unit controls the driving source such that the rotary feeding member starts to move toward the first position based on an elapse of a second time longer than the first time since the detection portion detected the leading edge of the sheet, and position the rotary feeding member at a position separated more from the stacking portion than the first position when the trailing edge of the sheet passes through the separation nip.

A method and apparatus for processing mail is provided. A feeder serially feeds envelope from a stack of mail. Two cutters at a cutting station cuts one or two edges of the envelopes. As the envelopes travel from the feeder to the cutters the envelope is jogged on two edges to justify the contents with the envelopes. Additionally, an improved feeder is provided to reduce the number of jams created when feeding the envelopes from the stack.

A method and apparatus for processing mail is provided. A feeder serially feeds envelope from a stack of mail. Two cutters at a cutting station cuts one or two edges of the envelopes. As the envelopes travel from the feeder to the cutters the envelope is jogged on two edges to justify the contents with the envelopes. Additionally, an improved feeder is provided to reduce the number of jams created when feeding the envelopes from the stack.

A sheet feeding device includes a reversing roller, a guide member and a rotatable member. The guide member includes a curved portion to curve inside a first surface of the sheet and guides the sheet along the curved portion in contact with a second surface opposite to the first surface of the sheet in a first direction. The rotatable member disposed opposed to a sheet guide surface in the curved portion with a gap and is rotated by contacting with the first surface of the sheet. When the sheet is fed by the reversing roller in a second direction, the rotatable member is rotated by contact of the first surface of the sheet with the rotatable member.

A roll conveyance device includes a transportation device including a roll holding shaft extending in a predetermined direction from a distal section of an arm to hold a roll such that the roll holding shaft is inserted into a core member of the roll; and a mounting section within a moving range of the roll holding shaft, the mounting section allowing the roll to be mounted in a state in which both axial ends of the core member of roll are open. The transportation device is configured to mount the roll on the mounting section, the roll holding shaft is to be pulled out from the core member of the roll mounted on the mounting section to a first side of an axial direction of the core member, and the roll holding shaft is to be inserted into the core member from a second side of the axial direction.

A roll conveyance device includes a transportation device including a roll holding shaft extending in a predetermined direction from a distal section of an arm to hold a roll such that the roll holding shaft is inserted into a core member of the roll; and a mounting section within a moving range of the roll holding shaft, the mounting section allowing the roll to be mounted in a state in which both axial ends of the core member of roll are open. The transportation device is configured to mount the roll on the mounting section, the roll holding shaft is to be pulled out from the core member of the roll mounted on the mounting section to a first side of an axial direction of the core member, and the roll holding shaft is to be inserted into the core member from a second side of the axial direction.

A conveyance mechanism capable of attaining high conveyance performance and protecting a conveyance object and a mechanism itself, a medium processing device and a conveyance method using the conveyance mechanism are provided to solve the problem. The conveyance mechanism includes a conveyance passage which is a passage where a conveyance object is conveyed, a conveyance member moving the conveyance object along the conveyance passage, a motor driving the conveyance member, a control part controlling an output torque of the motor, a conveyance state identifying means identifying a conveyance state that is a position and/or a conveyance direction of the conveyance object in the conveyance passage, and a storage part which upper limit torque information which is an upper limit value of an output torque allowable for the motor or a parameter value required for calculation of the upper limit value is registered for each type of the conveyance state.

A conveyance mechanism capable of attaining high conveyance performance and protecting a conveyance object and a mechanism itself, a medium processing device and a conveyance method using the conveyance mechanism are provided to solve the problem. The conveyance mechanism includes a conveyance passage which is a passage where a conveyance object is conveyed, a conveyance member moving the conveyance object along the conveyance passage, a motor driving the conveyance member, a control part controlling an output torque of the motor, a conveyance state identifying means identifying a conveyance state that is a position and/or a conveyance direction of the conveyance object in the conveyance passage, and a storage part which upper limit torque information which is an upper limit value of an output torque allowable for the motor or a parameter value required for calculation of the upper limit value is registered for each type of the conveyance state.