A core prevents a battery separator wound therearound from moving and becoming misaligned on an outer circumferential surface of the core in a widthwise direction of the core. The core allows a separator to be wound around the outer circumferential surface thereof and is made of resin. The core includes a groove formed on the outer circumferential surface thereof, the groove extending in a direction substantially equivalent to a circumferential direction of the outer circumferential surface.

A coating film transfer tool in which a rotational torque with the least variability may be generated without being affected by a surface state of a resilient body is provided. In an automatically winding type coating film transfer tool including: a paying-out core having a coating film transfer tape wound thereon; and a rewinding core that rewinds the coating film transfer tape after use, the paying-out core and the rewinding core being interlocked via a power transmission mechanism in a case, and generating a rotational torque by a frictional force generating on a sliding surface between components by using a restoring force of a resilient body, the resilient body is configured to rotate integrally with a component A that comes into contact with one end of the resilient body and a component B that comes into contact with the other end.

A vacuum station comprising a main housing and a pair of arms extending from the main housing. The arms are configured to hold a roller. The main housing has a front face and a rear face, with the front face having a recess therein. An air path extends from the front face to the rear face. The vacuum station also includes a removable plate having a plurality of suction holes therethrough located within the recess in the front face of the main housing. The removable plate is removably connected to the main housing by magnets. A sheet of labels can be held to the removable plate by a suction force through the air path in the main housing and the suction holes in the removable plate.

A sheet discharging apparatus configured to discharge a sheet includes a discharging portion, a contact member, and a detector. The discharging portion discharges a sheet so as to be bent in a curved shape in a width direction of the sheet, perpendicular to a discharging direction of the sheet when viewed in a sheet discharging direction. The contact member is moved by contact with the sheet discharged by the discharging portion, wherein the contact member includes a contact surface to be in contact with the sheet which is inclined along the curved shape of the sheet in the width direction of the sheet when viewed in the sheet discharging direction. The detector detects a discharging of the sheet based on the movement of the contact member.

Disclosed is a paper-sheet-feeding/conveying roller having an elastic body 10 and a surface treatment layer 11 which has been formed by impregnating a surface portion 10a of the elastic body 10 with a treatment liquid containing an isocyanate compound and curing the liquid; and the micro hardness (Hs.sub.1) of the surface treatment layer 11, the friction coefficient (.sub.1) of the surface treatment layer 11, the micro hardness (Hs.sub.2) of the elastic body 10 after removal of the surface treatment layer 11 and the friction coefficient (.sub.2) of the elastic body 10 after removal of the surface treatment layer 11, the micro hardness values being determined by way of a micro hardness tester, satisfy the following relationships of formulas (1) and (2): 0<(Hs.sub.1Hs.sub.2)/Hs.sub.217% (1) and |.sub.1.sub.2|/.sub.2<22% (2).