An apparatus includes a bi-modal roller configured to rotate about a longitudinal axis of the bi-modal roller. The bi-modal roller includes two ends and a rolling outer surface. The rolling outer surface is divided into a convex portion and concave portion. The concave portion includes at least one concave curve extending longitudinally between the two ends. The concave portion is configured to, when a film physically contacts the concave portion, affect translation of the film in response to a stick condition or a slip condition. The convex portion includes at least one convex curve extending longitudinally between the two ends. The convex portion is configured to, when the film physically contacts the convex portion, affect translation of the film in response to a stick condition or a slip condition.

A print device comprises a media pickup assembly to feed print media, from a print media stack of an input tray, into a media loading path for printing. The media pickup assembly (106) includes a pickup roller (110) mounted on a rotatable shaft (108) and may include an outer surface (112) to be in contact with the print medium and a slot (114) comprising lateral walls (404) extending from the outer surface towards a central longitudinal axis of the pickup roller. Each lateral wall has an edge meeting the outer surface (112). The edge (408) creates a surface contact between the print media and the pickup roller, to allow the pickup roller (110) to push the print media into the media loading path. A distance between the edge (408) of one lateral wall (404-1) and the edge of another lateral wall (404-2) is in a range of about 2 mm to 3 mm. The distance defines a width of the slot (114).

A calender transport roller for a calendering device for production of electrodes for a battery cell, where an electrode strip is conveyable by the calender transport roller to or from a pair of calendering rolls and where the electrode strip has a flat conductor strip and a coating which is applied in portions at least on a side that faces the calender transport roller. The calender transport roller includes a contact region on a shell surface of the calender transport roller where the contact region is contactable with the electrode strip, an adjusting portion in the contact region, and a widening device where a diameter of the transport roller in the adjusting portion is changeable by the widening device such that a height difference between a coated portion of the electrode strip and an adjoining uncoated portion of the electrode strip is compensated.

Provided is a medium conveying apparatus to enable suitable feeding of a plurality of types of media. A medium conveying apparatus includes a guide member including an opening or a notch and configured to form a conveyance surface of a medium, a feed roller located inside the opening or the notch and configured to feed the medium, a separation roller located to face the feed roller, and protruding parts located on left and right sides of the separation roller relative to a medium conveying direction. The guide member includes recessed parts positioned on left and right sides of the feed roller relative to the medium conveying direction. The protruding parts are located at positions facing the opening or the notch, or the recessed parts in such a way that the medium is conveyed between the protruding parts and the recessed parts. A tip of each of the protruding parts is positioned on the feed roller side of a nip part of the feed roller and the separation roller.

A sheet transport apparatus according to an embodiment includes a roller having a surface formed from an elastic material. The roller transports a sheet. A rotation mechanism rotated the roller around an axis of the roller. A twist mechanism selectively twists the roller with respect to the axis. When the roller is twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in a first direction perpendicular to the axis and in a second direction parallel to the axis. When the roller is not twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in the first direction and not in the second direction.

A paper feed roll includes a shaft body and an elastic body layer formed on the outer circumferential surface of the shaft body. The outer diameter of the elastic body layer is 10-50 mm, the outer circumferential surface of the elastic body layer is provided with, in the circumferential direction, 1-8 grooves extending in the axial direction, the grooves have a constant groove width in the depth direction or have a groove width that gradually decreases in the depth direction, the groove width of the grooves is 0.2-1.0 mm, and the groove depth of the grooves is 0.2-1.0 mm.

A sheet transport apparatus according to an embodiment includes a roller having a surface formed from an elastic material. The roller transports a sheet. A rotation mechanism rotated the roller around an axis of the roller. A twist mechanism selectively twists the roller with respect to the axis. When the roller is twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in a first direction perpendicular to the axis and in a second direction parallel to the axis. When the roller is not twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in the first direction and not in the second direction.

A sheet transport apparatus according to an embodiment includes a roller having a surface formed from an elastic material. The roller transports a sheet. A rotation mechanism rotated the roller around an axis of the roller. A twist mechanism selectively twists the roller with respect to the axis. When the roller is twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in a first direction perpendicular to the axis and in a second direction parallel to the axis. When the roller is not twisted and the rotation mechanism rotates the roller, a sheet transported by the roller is transported in the first direction and not in the second direction.

A sheet transportation device includes a guide roll along which a sheet is to be wound. The sheet includes a plurality of tabs provided intermittently in a longitudinal direction along at least one end in a width direction. The guide roll includes a cylindrical roll main body and a short-diameter portion connected with the roll main body so as to be outer, in the width direction of the sheet, to the roll main body. The roll main body is located closer to a center, in the width direction, of the sheet than a transportation path for the end. A portion of the sheet that is closer to the center than the end is wound along the roll main body. The short-diameter portion is connected with the roll main body via a stepped portion, and has an outer diameter shorter than an outer diameter of the roll main body.

Provided is a medium conveying apparatus to enable suitable feeding of a plurality of types of media. A medium conveying apparatus includes a guide member including an opening or a notch and configured to form a conveyance surface of a medium, a feed roller located inside the opening or the notch and configured to feed the medium, a separation roller located to face the feed roller, and protruding parts located on left and right sides of the separation roller relative to a medium conveying direction. The guide member includes recessed parts positioned on left and right sides of the feed roller relative to the medium conveying direction. The protruding parts are located at positions facing the opening or the notch, or the recessed parts in such a way that the medium is conveyed between the protruding parts and the recessed parts. A tip of each of the protruding parts is positioned on the feed roller side of a nip part of the feed roller and the separation roller.