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:
Nov. 27, 2001
Filed:
Feb. 08, 2000
Antti Leinonen, Laukaa, FI;
Valmet Corporation, Helsinki, FI;
Abstract
A method and arrangement for preventing rewetting of a web in a paper machine. In the method, a web supported by a wire is passed by at least two vacuum boxes/chambers after the last suction roll or equivalent in a web former such that, in the running direction of the web, by means of a first vacuum box/chamber and by means of a second vacuum box/chamber the transport of moisture from the wire back into the web is prevented. In the arrangement at least two vacuum boxes/chambers are arranged after the last suction roll or equivalent in a web former, and the web and wire are arranged to be dewatered by means of a first vacuum box/chamber and the transport of moisture from wire back into the web is prevented by means of a second vacuum box/chamber, the vacuum generated in first vacuum box/chamber being higher than the vacuum generated in the second vacuum box/chamber.