Mandrel for spirally winding electrochemical cell pack
CA 1102870 A · Owner: Gates Rubber Company (The) · Inventors: Mcclelland, Donald H.; Uba, Toshio; Hug, Leonard F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A spirally wound element comprising opposite polarity plates and interleaved separator is described, for use in electrochemical cylindrically configured cells. The cell pack has a uniform predetermined cross section irrespective of variation in component thicknesses as long as such thicknesses are within specified tolerances. A mandrel for facilitating the winding of the cell pack has a pair of oppositely disposed notched lands which extend, inwardly from the peripheral surface of the mandrel for receiving leading edges of the cell pack to be wound. The mandrel also has a pair of major edge surfaces extending from the lands about a major portion of the periphery of the mandrel; the edge …
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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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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.