Headbox for a paper machine
CA 1201914 A · Owner: Valmet Oy · Inventors: Koski, Erkki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A head box for a paper machine which comprises a, distributor beam part a distribution part connected thereto, and a turbulence generator followed by a slice-cone part. The turbulence generator is provided with a large number of flow holes. The outlet mouths of these flow holes open themselves into flow slots of the turbulence generator the direction of, the middle plane of the said flow slots being at an angle (?) of about 5° to 45° to the axial direction of the flow holes. The magnitude of the angle (?) is preferably ?= about 10° to 20°. The axial direction of the holes in the turbulence generator declines at an angle (.beta.) of about 5° to 15° as compared with the upwardly slanting main …
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
- Granted March 18, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 18, 2003.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.