Quick thread wrapping machine stretch head and wrapping film method
CA 2252275 C · Owner: Engler, Kurt E. · Inventors: Engler, Kurt E.; Scherer, Philip G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wrapping machine stretch head comprises a pair of tension rollers having first ends mounted upon a base plate and second ends mounted within separate and independent brackets such that the second ends of the tension rollers are not connected to each other and define an axially open space therebetween. In this manner, when wrapping film is to be threaded or routed between and around the tension rollers the wrapping, film is able to be inserted into the axially open space in an axially oriented mode. The rotary drive system for the tension rollers is also mounted upon the base plate and not within an upper frame member as is characteristic of conventional wrapping machine stretch heads.
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 2, 1998 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 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.