Kobe Steel, Ltd.

Nobuhiko Harada

Masamitu Tamura

Kazuo Akagi

Shigeharu Nakamura

Masanao Shimano

Kunito Nunomura

Minetaka Tanaka

Katsumi Maeda

Kyozo Fujinaga

Sigeharu Nakamura

An apparatus and process for etching the inner surface of a pipe or tubular member includes a primary pipe adapted to be connected with a pipe or pipes whose inner surfaces are to be treated, and treating-solution supply pipes communicating, by means of electromagnetic valves, with the aforenoted primary pipe, whereby one path for a specific solution to be fed through one of the treating-solution supply pipes by means of the primary pipe into the pipe to be treated is automatically switched to another path by means of the aforenoted electromagnetic valves, without causing mixing of one solution with another. This apparatus and process therefore provides improved operational efficiency as well as a uniform surface condition and achieves accurate dimensioning for the inner surface of the pipe to be treated.

Process for etching inner surface of pipe or tube

A conveying device for conveying long articles within heat treatment furnaces, the driving means of which includes a drive mechanism and at least one element of linear form, for conveyance of the articles, driven by means of the drive mechanism. Product carriers are conveyed by means of the linear conveying element, each product carrier having a plurality of product supports for supporting the long articles thereon. The foremost one of the carriers, with respect to the direction of motion, has a means of engaging the linear conveying element whereby the linear conveying element transports the product carriers, and thereby the product supports and the long articles disposed thereon.

Conveying device for long articles within heat treatment furnaces

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Shimonoseki, Japan

Nobuhiko Harada