Sumitomo Rubber Industries Limited

Hirokazu Nishimori

Akihiro Mine

Toshiyuki Hirai

Toshihiro Tamura

Yasuchika Ito

Hideyuki Okuyama

Takeshi Ishimaru

Noriaki Hitomi

Masahiro Yoshizato

Keishi Yamamoto

Naoyuki Astoyoshi

The paper feed roller according to the present invention is made of a thermoplastic elastomer composition containing an ester thermoplastic elastomer urethane or an ether thermoplastic elastomer urethane (E) having microrubber hardness (type A) of not less than 60 and not more than 80 and a plasticizer (P) in a mass ratio E/P of 70/30 to 50/50.

Paper feed roller

The inventive sheet conveying roller includes a plurality of linear projections provided on an outer peripheral surface of a roller body of an elastic material and each having a generally right-angled triangular cross section which includes a hypotenuse edge and an adjoining edge provided on a forward side and on a rearward side, respectively, with respect to a roller body rotation direction, the adjoining edge aligning with a line perpendicular to a center axis of the roller body. The linear projections are rounded with the hypotenuse edges and the adjoining edges thereof connected to each other by curves as seen in section, and provided integrally with the roller body to be equidistantly arranged on the outer peripheral surface of the roller body.

Sheet conveying roller and image forming apparatus

A paper-feeding roller including a rubber composition containing short fibers in which the short fibers has an average fiber diameter not less than 10 &#x3bc;m nor more than 100 &#x3bc;m and an average fiber length not less than 0.01 mm nor more than 4 mm. At least one part of all of the short fibers is radially oriented at an angle not less than 10 degrees nor more than 90 degrees with respect to a plane which contacts a surface of the paper-feeding roller, with one end of each of the radially oriented short fibers disposed exposably on the surface of the paper-feeding roller.

Paper-feeding roller

A paper-feeding roller () including a core () and a rubber roll () mounted on a peripheral surface of the core (). The rubber roll () has a three-layer construction composed of an inner layer (), an intermediate layer (), and an outer layer (). The inner layer (), the intermediate layer (), and the outer layer () are a non-foamed layer respectively. The JIS-A hardness of the inner layer () is set to not more than 10 degrees. The JIS-A hardness of the outer layer () is set to a range of 25 to 60 degrees.

A member for preventing feeding of a plurality of sheets at a time including a composition containing a resin component. Not less than 10 parts by mass nor more than 100 parts by mass of a polyester thermoplastic elastomer is contained in 100 parts by mass of the resin component. The polyester thermoplastic elastomer is composed of a hard segment and a soft segment. The hard segment consists of diester groups of aromatic dicarboxylic acid. The soft segment consists of ester groups of aliphatic carboxylic acid or aliphatic polyether groups.

Growing community of inventors

Hyogo, Japan

Hirokazu Nishimori