Glass gob shearing apparatus with improved cushioning of shear blade carriages
CA 2234868 C · Owner: Owens-Brockway Glass Container Inc. · Inventors: Menzie, Andrew B.; Difrank, Frank J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A parallel shear apparatus for sequentially shearing each of a plurality of streams of molten glass from a glass feeder into gobs for processing into glass containers by a glass forming machine. The apparatus has first and second opposed carriages which are reciprocable along parallel slides toward and away from one another, each of the carriages carrying one or more opposed knife elements corresponding to the number of streams of molten glass and the opposed knife, elements overlap at the innermost limits of their travel to perform the shearing action. Motion of the carriages is actuated by a unidirectionally acting servo motor which, imparts oscillating motion to a bell crank through a …
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 15, 1998 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2020.
- 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.