A method of forming a drum assembly
CA 2303499 A1 · Owner: De Schamphelaere, Lucien Amede · Inventors: De Schamphelaere, Lucien Amede; De Cock, Etienne Marie; Van Weverberg, Erik Gabriel Gerardus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is described for forming a drum assembly for use as a rotatable endless surface means onto which a toner image can be formed in an electrostatographic single-pass multiple station printer. The drum assembly comprises a hollow, cylindrical drum (234) carrying a photoconductive surface layer and, at each end of the drum (234) a flange, (233) and a shaft (231) having a collar (232) fixed thereon which is sized to fit with clearance inside the flange (233) and which is secured thereto by adjustable fixing screws (235). Each flange (233) is provided over-sized with respect to the internal diameter of the hollow drum (234). Each flange (233) is cooled before inserting it into the drum …
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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
- Filed June 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2016.
- 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.