Process for manufacturing a slotted hole screen
CA 2030712 A1 · Owner: Ehmcke, Wolfgang · Inventors: Ehmcke, Wolfgang; Pellhammer, Maurus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for manufacturing a slotted hole screen is suggested, wherein the slotted screen is particularly suited for use in devices for the sorting or cleaning treamtment of aqueous fiber suspensions for example in, paper manufacturing. In the process cross bars are, attached onto wire- or bar-shaped longitudinal members defining the screen slots. In order to substantially reduce the danger of the catching and thus the flocking and/or web formation of fibers in the suspension on the slotted hole screen during the subsequent operation of the screen, the joints between the longitudinal members and the cross bars are provided with coverings having a smooth surface out of a solder or another …
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 November 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2012.
- 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.