Document reproduction machine having a duplex copy mode
CA 1063158 A · Owner: International Business Machines Corporation · Inventors: Underhill, Thomas T.; Hubbard, James H.; Leclere, Ralph J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A document reproduction machine operates either in a simplex mode (each copy has an image only on one side) or in a duplex mode (copies have images on both sides). In the duplex mode, an interim storage unit stores partially completed copies (only one side of the duplex copies have an image). A second copy run completes the duplexed copy production. For an odd number of originals at the end of, a duplex copy run, the last-produced copy set resides in the interim storage unit. In one aspect of the disclosure in, response to an indication of the end of a duplex run the, machine automatically transfers the last-produced copy set from the interim storage unit to a copy output unit. In another …
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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 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.