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Expired Canadian patentCanada

Unwinding apparatus for paper or board web rolls or the like

CA 1319356 C · Owner: Beisswanger, Rudolf · Inventors: Beisswanger, Rudolf

CIPO record

Overview

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

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Abstract From the Canadian patent

17, Abstract of the Disclosure, An intermittently operating unwinding apparatus has a separating device with which a web end is formed on the lifting out of an empty spool from the guide ways of an unwinding unit. A holding device holds the web end in a plane which extends parallel to the guide ways on, which a new winding roll located in waiting position rests with its roll axle. The machine has a splicing unit with a cross-member arranged parallel to the guide ways to which the beginning of the web of the new parent roll can be joined. During transport of the new parent roll out of the waiting position into its unwinding position, the splicing unit is moved by dogs engaging the roll axle …

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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 22, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 15, 1988
GrantedJune 22, 1993
Term endedJune 22, 2010
Patent numberCA 1319356 C
Classification (IPC)B65H19/18

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJuly 15, 1988Patent grantedJune 22, 1993Term endedJune 22, 2010

Sources & verification

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