Sumitomo Osaka Cement Co., Ltd.

Kiyohiko Uchida

Satoshi Ozawa

Yasuhiko Shimada

Hiroo Ushioda

Masayoshi Konishi

Tatsuya Okamura

Sousuke Miyaji

Noriyuki Kozakai

It is an object of the present invention to provide moldings of hydraulic composition derived from hydraulic composition, to which both mechanical workability and wear resistance are simultaneously imparted, thereby achieving the applicability to a portion or part for which wear resistance is required, and ease of molding and shaping. According to the present invention, the molding of hydraulic composition prepared by press-molding a hydraulic composition, which comprises a hydraulic powder, a non-hydraulic powder having an average particle diameter of {fraction (1/10)} or less of that of the hydraulic powder and a workability improver, to form a molded product, then curing the molded product to form a cured product, and then providing one of a metallic coating and a metallic compound coating on the cured product.

Formed article from hydraulic composition

The present invention relates to paper feed rollers required to transfer papers in printers, facsimiles, copiers, etc. with accurately, and provides novel paper feed rollers which are lighter, less expensive and mass-producible with larger diameters as compared with conventional paper feed rollers. The paper feed roller according to the present invention includes a rotary shaft, a cylindrical roller portion formed by press molding a mixture of a hydraulic composition, followed by curing and hardening, and integrated with an outer periphery of the rotary shaft.

Paper feed roller and method of manufacture

Production method for paper feed roller

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Funabashi, Japan

Kiyohiko Uchida