Bag closing machine
CA 2065173 C · Owner: Johnsen Machine Company Ltd. · Inventors: Johnsen, Ole
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bag closing machine has a pair of endless belts mounted in a housing and having adjacent runs extending along a passage in the housing. The belts are driven to cause bags to be conveyed successively between the runs along the passage. A heating station adjacent the passage is operable to heat sealing areas of the bags to activate heat sealable material in a bag closing manner. The heating station has at least one pair of nozzles one nozzle of each, pair being on one side of the passage and the other nozzle of each pair being on the opposite side of the passage the, nozzles being directed towards the sealing area of a bag passing the heating station. Hot air is supplied to the nozzles to …
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 April 6, 1992 and granted May 17, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2014.
- 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.