Apparatus for tube forming
CA 2029116 C · Owner: Tetra Laval Holdings & Finance S.A. · Inventors: Andersson, Helge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for forming packaging material into a tubular form includes angularly disposed forming rollers for causing the longitudinal edges of the packaging material to overlap one another so that they can be sealed together. To prevent the packaging material tube from being trapped between adjacent rollers, each of the forming rollers can be provided with one straight roller edge and one chamfered roller edge. The rollers are positioned such that the chamfered roller edge of one forming roller cooperates with the straight roller edge of the adjacent roller thereby, defining a nip directed generally tangentially to an adjacent portion of the packaging material tube. Alternatively 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 November 1, 1990 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 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.