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:
Oct. 09, 1990
Filed:
Jan. 13, 1989
Leo S Laitinen, Huutjarvi, FI;
Veikko K Waris, Kyminlinna, FI;
Other;
Abstract
A method for manufacturing multilayer board in which the pulp suspension forming a surface layer (12) is fed onto the horizontal section of a first, inner wire (1). The pulp suspension forming an intermediate layer (11) is supplied onto said web layer, which is already formed, in or in front of a tapering gap (6) constituted by the first wire and a second, outer wire (4). Both of the wires and the web layers (11, 12) between them are guided over a curved surface (3). After this the first wire and both of the web layers are guided against a third wire (8) onto the horizontal section of which the pulp suspension forming the other surface layer (13) is supplied. The consistency of the pulp suspension forming the intermediate layer (11) is remarkably higher than that of the pulp suspensions forming the surface layers (12, 13).