Selectively tearable stock material for a dunnage conversion machine and method
CA 2602181 C · Owner: Cheich, Robert C. · Inventors: Cheich, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stock material (16) for use with a dunnage conversion machine (14) includes at least one ply of sheet material having spaced along the length thereof a plurality of transverse rows (22) of weakened areas (24). The weakened areas (24), which can be formed by perforations for example, have a reduced , strength relative to adjacent portions of the sheet material. Each row (22) of weakened areas (24) has at least one parameter that varies along the row (22). The strength of the stock material at the row (22) in response to a force , applied across the row (22) varies across the stock material (16).
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 March 23, 2006 and granted October 29, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 23, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.