The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2004
Filed:
Aug. 15, 2001
Masaru Fujiwara, Sanda, JP;
Takashi Ikeda, Sanda, JP;
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
The present invention relates to a braiding yarn made of expanded graphite for a gland packing which is to be used in a shaft seal part of a fluid apparatus or the like. In the braiding yarn made of expanded graphite of the invention, a braiding yarn base material of the inner-reinforce type is used in which a plurality of reinforcing fibers are embedded in the longitudinal direction in an expanded graphite tape of a predetermined width, with forming gaps in the width direction. A twisting process is performed in a state where both the end portions in the width direction of the expanded graphite tape are bent so that both the end portions in the width direction of the expanded graphite tape are directed toward the inner side in the width direction of the base material. Alternatively, while twisting the base material both the end portions in the width direction of the expanded graphite tape are bent so that both end portions in the width direction are directed toward the inner side in the width direction. According to the invention, flaking of expanded graphite particles during a process of twisting the braiding yarn made of expanded graphite is reduced or prevented from occurring.