Patent Yard Sign in
Expired Canadian patentCanada

Winding machine for winding a travel web of paper

CA 2208328 C · Owner: Kruger, Jens · Inventors: Maurer, Jorg Dr.; Kruger, Jens

CIPO record

Overview

Drawings and full text

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

Open the CIPO record

Abstract From the Canadian patent

To achieve this object, the winding machine of the invention includes two parallel wound web roll support rollers which are spaced apart and on which the roll being wound is supported. The gap between the support rollers and below the supported wound roll is to be pressurized. A pressure chamber is defined by the support rollers, the wound roll above and from below by a, cross member which bridges over the distance between the support rollers and closes the bottom of the gap. End walls close the ends of the chamber. The cross member is movable between a sealing position where it is in contact with, or at least is sealed with the two support rollers and bridges , the gap between them to an …

Read the whole patent

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 20, 1997 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 20, 1997
GrantedJune 13, 2000
Term endedJune 20, 2017
Patent numberCA 2208328 C
Classification (IPC)B65H54/02 +1 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedJune 20, 1997Patent grantedJune 13, 2000Term endedJune 20, 2017

Sources & verification

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