Electrochemical tape cleaning
CA 1084442 A · Owner: Sundstrand Data Control, Inc. · Inventors: Dodge, George H.; White, Lawrence H.; Springer, Harold L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for cleaning oxidation and other contamination from metal foil recording tape by passing it through a mercury bath to place a positive charge on the tape after which the tape is cooled and, in one modification pre-, conditioned as the tape is advanced through a negatively charged acid bath. The tape is then rinsed and jet sprayed in a water bath and is dewatered in an alcohol bath prior to being wound on a take-up reel. Air knives are provided at the exit of each bath to strip off the liquid from that bath.
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 August 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 26, 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.