Device for the destruction of microfilms and the like
CA 1138399 A · Owner: Wigand, Gerhard · Inventors: Wigand, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device is provided for the destruction of microfils and the like; the device has at least two cutting edges adapted to move, in relation to each other, along a common path of relative movement, until complete mutual cutting engagement is achieved, each of the cutting edges including at each, point along the length thereof an angle with the direction of, relative movement characterized in that a suction device is present on the side thereof lying beyond the cutting location, as seen in the direction of feed of the material to be cut up, the suction device is suitably in the form of a suction blower, that is preferably arranged below the cutting location.
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 December 28, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 28, 1999.
- 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.