Sumitomo Rubber Industries Limited

Hirofumi Konishi

Akihiro Mine

Toshikazu Kondo

Toshiyuki Hirai

Yudai Okuno

Yoshihiro Yamada

Hideyuki Shigemoto

Masayoshi Kashibe

Yuichi Sato

A medical rubber composition can contain, comprise, consist, or consist essentially of: (a) an isobutylene-isoprene rubber: (b) a diene-based rubber; and a silica having a BET specific surface area not lower than 130 m/g. An amount of (a) the isobutylene-isoprene rubber contained in 100 parts by mass of a rubber component composed of (a) the isobutylene-isoprene rubber and (b) the diene-based rubber can be larger than 30 parts by mass and smaller than 55 parts by mass.

Medical rubber composition, medical rubber part, and pre-fillable syringe

A paper feed roller of the present invention comprises a roller bodyintegrally formed of elastic material in a cylindrical shape in which a plurality of protruding linesare disposed on a peripheral surfaceat even intervals, wherein the roller bodyis formed so that crest portionsand trough portionsare continuously provided in a circumferential direction, an opening angle &#x3b8; is equal to or more than 2&#xb0; and is equal to or less than 8&#xb0;, 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 rat a shoulder is equal to or more than 0.55 mm.

Paper feed roller and image forming apparatus with the paper feed roller

Growing community of inventors

Kobe, Japan

Hirofumi Konishi