The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2000
Filed:
Jun. 09, 1997
Borgeir Skaugen, Beloit, WI (US);
Gregory L Wedel, Beloit, WI (US);
Beloit Technologies, Inc., Wilmington, DE (US);
Abstract
A papermaking machine including a forming section for forming a paper web, a press section for pressing water from the paper web, and a dryer for drying the paper web is disclosed. The dryer includes a wet end for drying the paper web to at least about 60 percent solids and a dry end for further drying the paper web. The dry end includes at least one series of alternating dryer cylinders and vacuum rolls. A dryer felt transports the paper web as the dryer felt travels about each dryer cylinder and each vacuum roll of the series. In one disclosed embodiment, at least one of the vacuum rolls receives a vacuum of at least about one inch water column (1.5 kilo-pascals, 'kPa') to restrain the web as it dries. A method for manufacturing a paper web while restraining it by using the dryer apparatus described above is also disclosed. Drying the paper web under restraint in the dry end of the dryer can substantially reduce cross-machine direction shrinkage and stretch of the web, reduce edge curl, and have other substantial benefits.