Segmented metering die for hot melt adhesives or other polymer melts
CA 2327357 A1 · Owner: Allen, Martin A. · Inventors: Allen, Martin A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A segmented die assembly (10) comprising a plurality of side-by-side and separate units. Each die unit includes (a) a manifold segment (11A-11D) having an internal gear pump (15A-15D), (b) a die module (12A-12D) mounted on the manifold segment, and (c) a recirculating module (2A-2D) mounted on the manifold segment. The manifold segments (11A-11D) are interconnected and function to deliver process air and polymer melt to the modules (12A-12D). Each die module (12A-12D) includes (a) a fiberization nozzle (13) and (b) a , valve (21) for controlling the flow of polymer therethrough. The gear pump (15) of each manifold segment receives a polymer melt and delivers it either to the die …
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 April 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 20, 2021.
- 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.