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Expired Canadian patentCanada

Method of and improved apparatus for making discrete airlaid absorbent fibrous articles

CA 1270361 C · Owner: Peterson, David Albert · Inventors: Peterson, David Albert; Benson, Douglas Herrin

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

An improved, continuous airlaying apparatus for making airlaid articles such as discrete absorbent fibrous cores for catamenial napkins and disposable diapers and the like having high structural integrity, and good edge definition. The articles are airlaid in discrete cavities as they pass through a deposition zone of the apparatus, and are compacted a predetermined amount prior to their being removed from their respective deposition cavities. An exemplary mechanism for effecting the compacting comprises a lugged cylinder having circumferentially spaced lugs which are configured and pitched to mesh in a quasi gear-like manner with the deposition cavities.

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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 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
  • 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 31, 1985
GrantedJune 19, 1990
Term endedJune 19, 2007
Patent numberCA 1270361 C
Classification (IPC)B27N3/14 +1 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedJan 31, 1985Patent grantedJune 19, 1990Term endedJune 19, 2007

Sources & verification

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