Method and apparatus for making monofilament twines
CA 1107585 A · Owner: Exxon Research And Engineering Company · Inventors: Dewhirst, William; O'Neil, John B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing twine composed of a plurality of thermoplastic monofilaments in a bundle which comprises passing a bundle of thermoplastic, monofilaments continuously along a path imparting a false twist of 3 to 30, turns per linear foot to said bundle applying a compatible molten thermoplastic spiral band to the outer monofilaments and recovering a twine having a, portion of said false twist captured therein by fusion of the spiral band thereon. The apparatus for obtaining this twine consists of a path along which a bundle of thermoplastic synthetic monofilaments having a false twist therein can be continuously moved, means to direct a molten compatible thermoplastic on to said …
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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 August 25, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 1998.
- 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.