Single tier dryer section for curl control
Patent 5283960 Issued on February 8, 1994. Estimated Expiration Date: 
July 21, 2013. 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.
July 21, 2013. 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 ReferencesDryer section Web transfer apparatus Threading the web into a twin wire dryer group Patent #: 5232554 InventorsAssigneeApplicationNo. 095135 filed on 07/21/1993US Classes:34/117, With threading, stripping, or guiding devices34/116, With belts or felts34/120Threading, stripping, or guiding devicesExaminersPrimary: Bennett, HenryAttorney, Agent or FirmForeign Patent References
International ClassF26B 005/04AbstractA drying apparatus is disclosed for drying a web of paper. The apparatus includes a plurality of top felted drying sections for drying the web. Each of the drying sections is arranged in succession such that the web is restrained against cross-machine and machine directional shrinkage during passage of the web through the plurality of drying sections. A further single drying section only is disposed downstream relative to the plurality of drying sections such that the web extends between the plurality of drying sections and the further drying section. The further drying section includes an upper tier of dryers and an upper plurality of rolls which are disposed between adjacent dryers of the upper tier. An upper felt extends alternately around each dryer of the upper tier and each roll of the upper plurality of rolls. The further drying section also includes a lower tier of dryers and a lower plurality of rolls disposed between adjacent dryers of the lower tier. A lower felt extends alternately around each dryer of the lower tier and each roll of the lower rolls. The arrangement is such that the web extends in open draw between each dryer of the upper and lower tiers so that any tendency of the web to curl is controlled during movement of the web through the further drying section.Other References
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