Panasonic Intellectual Property Management Co., Ltd.

Sakata Inx Corporation

Masashi Fujiwara

Atsuhiro Kawamoto

Masaru Kowa

Kaito Matsui

Takahiro Noguchi

Tatsurou Tsuchiya

Hiroyuki Ishikawa

Shigeru Ohtsuka

A base material is welded by a first welding method in a case where a welding parameter related to heat input to the base material is less than a first threshold value. The base material is welded by a second welding method in a case where the welding parameter is less than a second threshold value and is more than the first threshold value. The base material is welded by a third welding method in a case where the welding parameter is more than the second threshold value. By adjusting welding conditions regardless of the thickness of the base material, a welding method suitable for the thickness of the base material is determined to provide a welding with little spatter and no meltdown of the base material.

Arc welding method and arc welding device

The invention relates to ink compositions for ink-jet recording which can avoid clogging of nozzles. An ink composition for ink-jet recording comprising a pigment and a compound containing 5 to 90 moles of ethylene oxide per 1 mole of polyglycerin having a polymerization degree of 2 to 10 in an aqueous medium is provided.

Ink compositions for ink-jet recording

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Osaka, Japan

Masashi Fujiwara