Vacuum platen transport plenum vacuum shutter
CA 2036123 C · Owner: Siegel, Robert P. · Inventors: Brant, William; Siegel, Robert P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanism for shuttering of vacuum ports of a vacuum platen transport (VPT) plenum in correspondence with the size of the documents being transported from the document tray of a recirculating document handler. The shuttering mechanism is coupled to a movable side guide of the document tray and includes a flexible coiled tape mounted with respect to the vacuum plenum of the VPT and movable side guide of the document tray such that movement of the side guide causes the tape to seal off vacuum slots within the plenum that are not located beneath documents.
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 February 11, 1991 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2013.
- 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.