A method for producing coreless roll paper includes a winding step in which paper 11 is wound on a shaft 20 in a roll shape, and an extracting step in which the shaft 20 is extracted from roll paper 12 to form a center hole 13. The shaft 20 includes a body part 22 having grooves 23, and a sleeve 30 is put on and fixed to the body part 22. In the winding step, the paper 11 is wound on the sleeve 30.

An automatic teller machine includes a guide, shafts and rollers. The guide extends in a conveyance direction along which papers are conveyed and includes a conveyance surface on which the papers are conveyed. The shafts are retained in the guide, and the rollers are turnably supported by the shafts. The guide includes a roller slot in which the rollers are disposed, and pairs of shaft slots that are opposingly formed to sandwich the roller slot. Each pair of shaft slots retains two ends of one of the shafts. The guide may include protrusion portions in the shaft slots that protrude in a direction orthogonal to the conveyance surface, and the shafts may include holes through which the protrusion portions are inserted when the shafts are retained in the shaft slots. Projection portions may be formed at the guide, projecting from predetermined positions of inner faces of the shaft slots, and the projection portions may abut against the shafts when the shafts are retained in the shaft slots.

A sheet feeder device includes: a sheet feed tray configured to store a sheet stack formed with a plurality of paper sheets; an elastic member capable of expanding and contracting; a contact mechanism configured to bring the elastic member into contact with an edge of the sheet stack; an expansion mechanism configured to expand the elastic member in a direction of stacking of the paper sheets; and a control unit configured to cause the expansion mechanism to expand the elastic member while the elastic member is kept in contact with the edge of the sheet stack by the contact mechanism.

A office machine including a data carrier transferring passage and a transmission assembly disposed in the data carrier transferring passage is provided. The transmission assembly includes a shaft disposed along a pivoting axial and a transferring roller pivoted with the shaft, wherein the transferring roller rotates along the pivoting axial. The transferring roller includes a body and multiple grooves. The body has a transferring surface and two supporting surfaces. The two supporting surfaces are connected with two sides of the transferring surface and pivoted with the shaft. The grooves are arranged on the transferring surface, wherein each groove has two end portions. At least one of the two end portions is not connected to the supporting surfaces.

A paper feed roller of the present invention comprises a roller body 2 integrally formed of elastic material in a cylindrical shape in which a plurality of protruding lines 6 are disposed on a peripheral surface 5 at even intervals, wherein the roller body 2 is formed so that crest portions 6a and trough portions 6b are continuously provided in a circumferential direction, an opening angle is equal to or more than 2 and is equal to or less than 8, a radial height h of the protruding line is equal to or more than 0.051 mm and is equal to or less than 0.1 mm, and a curvature radius r1 at a shoulder is equal to or more than 0.55 mm.