Method and apparatus for drying coated webs
March 7, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPaint drying oven Process for heat-treating a fabric web Methods for controlling vapor concentrations in an atmosphere Catalytic solvent vapor incinerating apparatus Process for drying and curing wire insulation using heat exchange and apparatus therefor Hot air dryer structure Process for drying coated web Control system for air flotation dryer with a built-in afterburner Patent #: 4942676 InventorsApplicationNo. 666857 filed on 03/07/1991US Classes:34/444, Sheet, web, or strand34/79Separation of substances from treating or exhaust gases or vaporsExaminersPrimary: Bennett, HenryAssistant: Gromada, Denise L. Attorney, Agent or FirmInternational ClassF26B 003/00AbstractA method and apparatus for drying a continuously moving web carrying a liquid, wherein the web is passed through a dryer in which the web is exposed to a recirculating flow of heated drying gas. Exhaust gas is diverted and discharged from the recirculating gas flow at a flow rate which is variable between maximum and minimum levels, and makeup gas is added to the recirculating gas flow at a flow rate which is also variable between maximum and minimum levels. A process variable is sensed and compared to a selected set point. A first of the aforesaid flow rates is adjusted to maintain the process variable at the selected set point, and a second of the aforesaid flow rates is adjusted in response to adjustments to the first flow rate in order to insure that the first flow rate remains between its maximum and minimum levels. | |
