Method and an arrangement for producing spunlace material, and material produced thereby
CA 2096410 A1 · Owner: Billgren, Tomas · Inventors: Billgren, Tomas; Hellstrom, Jeanette
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for producing spunlace material in which there is formed a fibrous web by air-laying a layer of fibres of staple length on a forming wire and air-laying a layer of short fibres on top of the layer of staple fibres. According to the invention the fibrous web is passed to an, entangling wire (18) on which there is arranged at least one elongated element (17) whose diameter is much greater than the diameter of the wires (16) in the entangling wire (18) whereafter the fibrous , web is entangled. The invention also relates to an arrangement for carrying out the method, and to a spunlace material produced in accordance with the method.
Read the whole patent
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 November 18, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2013.
- 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.