Hitachi, Ltd.

Hitachi Plant Technologies, Ltd.

Akira Hirai

Kenji Mori

Makoto Nakahara

Toshio Akatsu

Mitsuaki Morimoto

Naoto Yokoyama

Takao Murayama

Satoshi Yawata

Nobuo Shibata

Jun Nakajima

Tsugio Udagawa

In a method of the present invention for holding a substrate in a vacuum, a glass substrate () is held by an adhesive pad () or an adhesive sheet, both of which are made from a material containing a diene based resin, whereby an adhesive agent is prevented from remaining on the substrate, and the adhesive sheet can be detached with ease from the substrate after assembling the substrates.

Method for holding substrate in vacuum

Substrate holding device including adhesive face with hexagons defined by convex portions

The welding position detecting apparatus incorporates a detecting portion including light emitter for emitting a light stripe onto a beveling surface of a work to be welded and a camera for receiving a reflected light from the beveling surface, a support member to which the detecting portion is mounted, which is disposed for rotation about an axis of the welding torch, and a motor for rotating the support member, whereby the detecting portion is rotated to a desired angular position about the axis of the welding torch.

Apparatus utilizing light stripe image for detecting portion to be

A welding position detecting apparatus provided on a welding torch which forms an arc between a welding wire and a groove face on a work piece. The apparatus has an optical system for irradiating the groove face with a converging ray at a point in advance of the point of the arc so as to form a groove face crossing image, and an observing optical system which introduces this groove face crossing image and an arc image into its field of view and by which the groove face crossing image and the arc image are detected at the same time.

Welding position detecting apparatus

Growing community of inventors

Ibaraki, Japan

Akira Hirai