Drawing apparatus and process for the manufacture of drawn plastic filaments
CA 2395921 A1 · Owner: Locher, Engelbert · Inventors: Dengel, Peter; Leiner, Helmut; Riboulet, Georges
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drawing device and process for the manufacture of drawn plastic filaments (2, 3) is, disclosed which includes a spinning device (1) and a pneumatic pull-off device (10), whereby, between the spinning device (1) and the pull-off device (10) a heating device (5) is positioned for, heating the filaments (2 3) to a temperature between their glass transition and their melting, temperature. The device of the invention has a more compact construction and is suited for the, manufacture of drawn plastic filaments with a titer above 1 dtex. Filaments of higher strength and, reduced stretch are achieved.
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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
- Filed July 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 2024.
- 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.