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:
May. 21, 1985
Filed:
Nov. 09, 1983
Tadao Matsuo, Kakogawa, JP;
Fumio Matsuoka, Kobe, JP;
Nobuo Yokota, Hyogo, JP;
Masaaki Yamamoto, Amagasaki, JP;
Mitsuboshi Belting Ltd., Nagata, JP;
Abstract
A method of producing accurately sized sintered material of ultra high molecular weight polyethylene including the steps of mixing an organic peroxide and a lubricant with an ultra high molecular weight polyethylene powder having more than 1,000,000 of mean molecular weight by a viscosity method and more than 3,000,000 by a light scattering method, and forming a ram extrusion of the mixture. The transverse dimensional accuracy, or displacement, i.e. the difference between the maximum surface diameter and the minimum surface diameter at longitudinally spaced positions of the extruded product, is extremely small, thereby providing highly accurate size, roundness, etc. Further, a product is formed by the method having uniform electroconductivity.