A medium transport device includes a transport roller unit including transport rollers configured to transport a medium, and a drive unit that drives the transport rollers, the drive unit includes a power transmitting portion, the transport roller unit includes a power transmitted portion, the power transmitting portion and the power transmitted portion are brought into a coupled state by the transport roller unit moving in a direction approaching the drive unit, and the power transmitting portion and the power transmitted portion are brought into a uncoupled state by the transport roller unit moving in a direction away from the drive unit.

A system and method for user friendly replacement of printer platen rolls includes a roll assembly having a support shaft with a bearing seated in a flange at one end. A crescent notch in a printer chassis receives the shaft into an interior of the notch. The assembly is moved axially so that a flange neck nests in the notch with a flange lip contacting a surface of the chassis. A lock contacts the lip to prevent axial motion of the assembly when installed. An opposed side of the shaft is placed in a bearing on an opposite side of the chassis.

A sheet conveyor includes: a chute which has openings spaced apart from each other in a first direction and guides a sheet; a drive shaft; drive rollers mounted on the drive shaft and each partly protruding from the chute through a corresponding one of the openings; driven rollers each urged and contactable with a corresponding one of the drive rollers; an intermediate bearing disposed at a first position located between adjacent two of the drive rollers; and a holder provided on the chute to hold the intermediate bearing located at the first position. The intermediate bearing is in contact with an outer circumferential surface of the drive shaft when located at a second position different from the first position. The intermediate bearing is slid from the second position to the first position in the first direction and held by the holder at the first position.

A sheet conveying device includes a driving roller, a driven roller and a pair of bearing members. The pair of bearing members is configured to rotatably support both ends of a rotating shaft of the driven roller. The bearing member has a supporting part and a pressing part. The supporting part is formed by winding an end portion on one side of a wire rod in a spiral shape. The supporting part has a shaft hole through which one end of the rotating shaft can be inserted. The pressing part is formed by winding an end portion on the other side of the wire rod in a spiral shape in an orthogonal direction to the rotating shaft. The pressing part is disposed so as to press the supporting part in a direction in which the driven roller comes into pressure contact with the outer face of the driving roller.

A sheet-type medium separating apparatus applicable in a self-service financial device for reliable sheet-by-sheet separation of an entire stack of banknotes. The apparatus includes a pickup roller component; a reversal roller component; and a separation roller component, where the reversal roller component includes a reversal roller, the reversal roller is fitted onto a reversal roller shaft via a one-way bearing, the reversal roller is provided with an inner sleeve cylinder fixed with the one-way bearing and a reversal roller sleeve sleeved onto the inner sleeve cylinder and capable of moving axially and flexibly. The separating apparatus allows for automatic adjustment of the meshing clearance between the reversal roller and the separation roller on the basis of the thickness of sheet-type media to be separated, thus effectively solving the problem of the sheet-type media being jammed or torn.

A film winding system is disclosed having a first winding station which is configured in a winding position to wind the film web into a film bale. A contact roller and a compensating roller are provided, wherein the contact roller is arranged adjacent to the first winding station in the winding position and is configured to guide the film web to the first winding station. The compensating roller is located before the contact roller in the direction of travel of the film web and is configured to guide the film web to the contact roller and to set a film tension. A first adjustment device is provided and configured to move the contact roller towards the winding station or away from the winding station, thereby enabling the setting of a specific contact pressure between the contact roller and the film bale. The first adjustment device comprises a slide system or an adjusting spindle.

A heat treatment apparatus includes a conveyance device, an outer wall, and guide rollers. The conveyance device conveys a workpiece. The outer wall has a processing space therein where the workpiece is processed while being conveyed. The guide roller is provided in the processing space and guides the workpiece. The guide roller includes a shaft, a first bearing and a second bearing, a cylindrical roller body, and a first cover and a second cover. The first cover and the second cover close corresponding gaps between an inner ring and an outer ring, on the outer sides of the first bearing and the second bearing, respectively, along the axial direction of the shaft.

A system and method for user friendly replacement of printer platen rolls includes a roll assembly having a support shaft with a bearing seated in a flange at one end. A crescent notch in a printer chassis receives the shaft into an interior of the notch. The assembly is moved axially so that a flange neck nests in the notch with a flange lip contacting a surface of the chassis. A lock contacts the lip to prevent axial motion of the assembly when installed. An opposed side of the shaft is placed in a bearing on an opposite side of the chassis.

A sheet conveyance apparatus includes a roller pair having first and second rollers, a roller holder having first and second guided portions, and a guiding portion having first and second guides. The first and second rollers can take a first state where the first roller contacts the second roller with a predetermined force and take a second state where the predetermined force is reduced. A first direction in which the first guide guides the first guided portion is inclined relative to a second direction in which the second guide guides the second guided portion. When viewed in a rotational axis direction of the first roller with the first and second rollers in the first state, an angle formed by a straight line passing through rotational centers of the first and second rollers and the first direction is smaller than an angle formed by the straight line and the second direction.

A sheet conveyance device includes a frame, first and second rollers, a roller shaft, an urging member, and a bearing. The bearing includes a holding portion to slidably hold the roller shaft and held by the frame. The holding portion is deformable. As viewed in a rotational axis direction of the roller shaft, a direction in which the urging member urges the second roller is defined as a first direction, a direction that is perpendicular to the first direction is defined as a second direction, and a region where the roller shaft is present in the second direction is defined as a first region. The frame holds the bearing so as not to be in contact with the holding portion in the first region downstream of a rotation center of the roller shaft in the first direction.