Baffle liner and method and apparatus for manufacturing
CA 2114568 C · Owner: Kellenberger, David D. · Inventors: Derby, Norwin C.; Nickell, Craig A.; Kellenberger, David D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liner for use in flexible bulk containers includes a tubular body section with at least one continuous baffle strip extending around the interior circumference of the body section, with the baffle strip attached to the body section at spaced apart intervals to form baffles defining four triangular shaped corners in the body section. The liner is formed on an apparatus having a feed path with feed rollers for feeding lengths of the liner material and the baffle strip material into contact with one another. The feed roller controlling the liner material has a variable speed control to allow longer lengths of the liner material to be placed adjacent the baffle strip. Heat sealers mounted …
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 January 31, 1994 and granted April 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2016.
- 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.