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Expired Canadian patentCanada

Opening device for detaching fiber material from compressed fiber bales

CA 1308534 C · Owner: Trutzchler Gmbh & Co. Kg · Inventors: Temburg, Josef; Leifeld, Ferdinand

CIPO record

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

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Abstract From the Canadian patent

A travelling opening device for detaching fiber material from top faces of fiber bales includes two opening rollers having generally horizontal longitudinal axes oriented perpendicularly to a travelling direction of the opening device; opening elements carried on the opening rollers; and grates formed of grate bars spaced parallel to the longitudinal axes and each having a horizontal length portion arranged to engage the top faces of the fiber bales. The elements of the opening rollers project between the grate bars and penetrate into the fiber bales. Each opening roller cooperates with a separate grate. The grates are movably supported independently from one another. The grate bars of each …

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 29, 1987
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308534 C
Classification (IPC)D01G7/04 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 29, 1987Patent grantedOct 13, 1992Term endedOct 13, 2009

Sources & verification

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