Alternately twisted yarn assembly and method for making
CA 1062562 A · Owner: E.I. Du Pont De Nemours And Company · Inventors: Lin, Perry H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Alternate-twist plied yarns, wherein a secondary strand for providing a special effect is plied with at least two alternately, false-twisted primary strands are made, by converging the secondary strand with the primary strands downstream of the point at which the primary strands are converged. Node centers at the twist reversal points for the secondary strand are displaced with respect to node centers of the primary strands. Improved effectiveness from an antistatic secondary strand in the plied yarn can be obtained by this method. Where a node of a secondary strand overlaps a node of the primary strands whether or, not the node centers are displaced a preferred configura-, tion is one …
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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 September 18, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 18, 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.