Toner transfer system
CA 1109922 A · Owner: Wang Laboratories, Inc. · Inventors: Nelson, Alfred M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for printing images on paper or other print medium, including a recording head which records magnetic images on a record tape, means for applying magneticallyattracted toner to the images, transports which hold the record tape and paper a small distance apart to leave an air gap of about 4 thousandths inch between them a pair of, electrodes located so that the toner on the record tape and the paper are sandwiched between the electrodes and a high, voltage source which applies a brief pulse of high voltage of a duration on the order of one millisecond between the electrodes, to form an electric field that propels the toner particles across the air gap from the record tape to the …
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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 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
- 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.