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. 17, 1990
Filed:
Jun. 20, 1988
Mauri Koivuranta, Petajavesi, FI;
Michael Odell, , NZ;
Valmet Paper Machinery Inc., , FI;
Abstract
Hybrid former for a paper machine which has a lower-wire loop forming a single-wire dewatering zone in which water is removed from a web being formed by a dewatering member situated inside the wire loop through the lower wire. The former also has an upper-wire unit which includes an upper-wire loop forming a second twin-wire dewatering zone after the first single-wire dewatering zone, together with a run of the lower wire. The former additionally includes a hollow-faced first forming roll fitted inside the upper-wire loop, at which the second, twin-wire dewatering zone starts, this zone being curved upwardly over a certain sector of this forming roll. A forming shoe is fitted inside the lower-wire loop after the forming roll and guides the second dewatering zone. This forming shoe is provided with a curved deck for guiding the lower-wire loop. Deflector units are fitted both inside the lower-wire loop and inside the upper-wire loop on the twin-wire dewatering zone between the first forming roll and the forming shoe. By way of these deflector units, sufficiently strong impulses improving the formation of a web are produced, which act upon the web that is being formed from both sides thereof.