Tuft picking device and method
CA 2032069 C · Owner: Lewis, John C. Jr. · Inventors: Lewis, John C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A brush making apparatus and method for assembling tufts of synthetic filament and for mounting the same on a brush back is described. The device includes a stock box having a front plate with an aperture therein and an open back with a flapper thereon. At least one hollow elongated picking element is provided which is dimensioned to be received through the aperture. The element is initially indexed through the aperture until it abuts the ends of filaments received in the box. Forward movement is them stopped. The flapper is then energized and a second indexing movement is provided wherein the element passes through the stock box receiving a plurality of filaments therein to form the tuft. …
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 December 12, 1990 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2012.
- 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.