Hollow shaft motor for false twist texturing yarn
CA 1066571 A · Owner: Du Pont Canada Inc. · Inventors: Wolstencroft, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 1996.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.