Nakamichi Corporation

Nippon Thompson Co., Ltd.

Haruyoshi Endo

Yoshihisa Inoue

Kazuhiko Saoyama

A tape scraper is made of a block of material having first and second planar internal surfaces disposed at an angle relative to each other. An external surface of the block is ground by a grindstone, while the block is rotated about an axis. The axis is located in a plane bisecting the angle between the planar internal surfaces. Grinding is continued until a groove between the two planar surfaces is opened to form facing knife edges. Rigid alignment of the knife edges is maintained by portions of the material which remain after grinding that connect the separated portions together.

Tape scraper and process for producing same

A linear motion guide unit having a rack and pinion mechanism for preventing slippage in relative sliding motion is provided. The linear motion guide unit includes a table elongated in shape and having a generally U-shaped cross section and a bed elongated in shape and having a generally U-shaped cross section which is oriented with its inner surface facing the inner surface of the table. The unit also includes a plurality of balls sandwiched between the table and the bed so as to provide a rolling contact therebetween. Also provided is a retainer having a horizontal section and a pair of vertical sections extending from the opposite sides of the horizontal section and formed with a plurality of windows for receiving therein the balls. The horizontal section of the retainer is formed with a slot and a pinion gear is rotatably supported on the retainer as extending partly through the slot and at the center in the widthwise direction of the retainer. A pair of top and bottom racks are mounted on the table and the bed, respectively, such that the pinion gear is in mesh with both of the top and bottom racks.

Growing community of inventors

Higashimurayama, Japan

Haruyoshi Endo