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:
Jan. 23, 1979
Filed:
Feb. 15, 1978
Michael J Wolstencroft, Kingston, CA;
Du Pont of Canada Limited, Montreal, CA;
Abstract
An improved rotatable twist tube device is disclosed for false twist texturing a continuous filament thermoplastic yarn being passed through the twist tube. The twist tube comprises a hollow shaft rotor constituted as the rotor of an electric motor. Two bell housings, one attached to each end of the motor body, house ball bearings which support the hollow shaft rotor near each of its ends. A friction bushing is positioned in each end of the hollow shaft rotor. The friction bushings each have a rounded front friction surface and have a back surface extending outwards from the hollow shaft rotor. The improvement comprises an annular extension of each bell housing which projects beyond the end of the hollow shaft rotor and encompass a portion of the adjacent bushing. The annular extension of each bell housing is adapted to prevent yarn wraps on the outside of the hollow shaft rotor by deflecting such wraps onto the surface of the friction bushing.