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:
Oct. 16, 2001
Filed:
Jun. 11, 1999
Ian Roberts, Pencaitland, GB;
David MacKenzie Hill, Berwick, GB;
Peri-Dent Limited, Selkirkshire, GB;
Abstract
A method of converting a plastics material into a yarn includes heating the material to melt it and pumping the melted material through an extrusion die (,) to form an extruded filament (,). The extruded filament is cooled and passed through a first draw roller assembly (,) while elevating the temperature of the filament. The filament (,) is heated in a heating zone (,) as it exits the first draw roller assembly. Thereafter the filament is passed through a second draw roller assembly (,) operating at a different linear speed to the first draw roller assembly (,). The filament (,) is spooled after exiting the second draw roller assembly (,).