Vacuum processing apparatus
CA 1307759 C · Owner: Boozenny, Alex · Inventors: Boozenny, Alex; Grubb, Albany D.; Overacker, Walter G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and an apparatus for transporting workpieces into and out of a single-ended vacuum processing apparatus is disclosed. The apparatus includes a processing chamber and a second chamber which contains a workpiece transporting device comprising two conveyors on a common frame and a means for aligning the frame and each conveyor to transfer workpieces in opposite directions through the second chamber. The second chamber may be an end lock with access to the outside or an intermediate lock or holding chamber between the processing chamber and an end lock. Preferably, the conveyors comprise two parallel sets of horizontal rollers and an elevator for selectively aligning each set of …
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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
- 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.