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:
Jan. 19, 1982
Filed:
Sep. 26, 1977
Rolf B Reinhall, Bellevue, WA (US);
Other;
Abstract
Method of producing fiberboard products according to the so-called dry method from lignocellulosic fiber material in which the fiber material discharged from a defibrating apparatus in an environment of steam is propelled in a stream of heated air to remove substantially all moisture therefrom. The thus dried fibers are deposited on an underlying moving perforated screen to form a mat in which the fibers are oriented at random while propellant air is evacuated therefrom. The thus formed mat is wetted by adding water thereto while it is being advanced by the screen into a hot press where the wetted fibers are compressed and bonded in their random orientation, with consequent removal of water. The amount of water added in the wetting step is proportioned to be effective in itself to bond the fibers without use of extraneous bonding or adhesive substance.