Automatic minimum differential pressure control for dryer cylinders
CA 1249719 A · Owner: Hercules Incorporated · Inventors: Jumpeter, Alex M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A supply of steam is fed to a drying cylinder (10) from a steam line (20) through a steam pressure control valve (22). Condensate and steam are removed from the drying cylinder to a separator (32). The pressure of the removed steam is controlled by a steam pressure control valve (36) and the rate of condensate removal is monitored by a condensate removal monitor (48). A computer controller (16) adjusts the steam feed and removal pressure control valves to maintain the smallest differential pressure therebetween which will maintain the condensate removal rate substantially constant. The computer controller sets an initial pressure differential during an initializing step (50). In a first …
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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 February 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2006.
- 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.