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Expired Canadian patentCanada

Device for changing the clothing of a paper machine

CA 2491405 C · Owner: Andritz Ag · Inventors: Mausser, Wilhelm; Schadler, Gerald

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a device for changing the clothing of a paper machine particularly a tissue machine, for example a TAD (through-air drying) machine with a number of deflection rolls 3, 4 5, 6 and at least one cleaning device 27 28, 29 for the machine clothing. Levers 9 20 are provided on either side of the machine clothing 7 where these levers hold at least one deflection roll 3 4 and can be pivoted from an operating position to a machine clothing changing position. Thus the time and the number of personnel required to change the machine clothing are reduced substantially.

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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 4, 2005 and granted July 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 4, 2005
GrantedJuly 17, 2012
Term endedJanuary 4, 2025
Patent numberCA 2491405 C
Classification (IPC)D21F7/00 +1 more

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedJan 4, 2005Patent grantedJuly 17, 2012Term endedJan 4, 2025

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.