Apparatus and method for tensioning a fabric in a paper machine
CA 2114574 C · Owner: Valmet Paper Machinery Inc. · Inventors: Kujala, Timo; Autio, Jukka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for tensioning a fabric in a paper machine, such as a press felt, a drying wire or an equivalent, fabric, including a tensioning roll arranged inside a loop of the fabric. Bearing supports of the roll are fixed at the driving, side and at the operating side of the machine to sledges. These, sledges are displaced by a motor synchronously in relation to one, another so as to tighten the fabric that runs over the tensioning roll to a certain tension. The sledges are arranged in connection with the frame part of the machine on linear guides which can be, loaded in different directions transverse to the direction of movement of the sledges. In view of displacing 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
- Filed January 31, 1994 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 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
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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.