Seal wrapping machine
CA 1074686 A · Owner: Oliver Machinery Company · Inventors: Blanding, Kenneth R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A packaging machine wherein an upper film is joined or sealed to a lower film at intervals between spaced articles being advanced on a conveyor, the seal being made by and between a vertically reciprocable upper, heated, joining element and a cooperative vertically reciprocable, lower abutment roller element. The abutment roller is at the plane of the conveyor, which is normally an endless belt, with the belt being there diverted around the abutment roller and around a drive roller engaging the abutment roller. The rollers and the heated element are on a carriage which is horizontally reciprocable in one direction with the belt and then back to a return position. The vertical strokes of …
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
- Granted April 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 1997.
- 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.