Process for the continuous hardening of tubes
CA 1069417 A · Owner: Mannesmann Aktiengesellschaft · Inventors: Meurer, Karl; Landgraf, Helmut; Forster, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a process for the continuous hardening of tubes in a horizontal position wherein a, plurality of tubes is arranged end-to-end and advanced helically while being heated externally by heating gas flames, radiators, or inductive currents subsequently heated internally by radiation or electro-inductively, and subsequently cooled both externally and internally by a cooling medium, the speed of advance of the tubes being from time to time temporarily accelerated to divide the substantially continuous line of tubes into individual tubes. The present invention also provides an apparatus for effecting said process which comprises a roller table for the helical …
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 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.