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:
Sep. 21, 1976
Filed:
Dec. 11, 1973
Osterreichisch-Amerikanische Magnesit Aktiengesellschaft, Radenthein, OE;
Abstract
Method for the production of cement-bonded molded articles, particularly lightweight boards of wood fiber, wood chips or other lignocelluloses, of mineral fibers, glass fibers, plastic chips and fibers or various lightweight materials, like expanded silicates, expanded clay or expanded glass or granules of foamed plastics as a base material and portland cement as a binder, characterized in that the molded articles are produced in a heated molding duct formed of endless moving belts, for example, steel belts, using a portland cement as a binder in the molding compound which contains 1 to 30% by weight, perferably 15 to 25% by weight, of a calcium-halogen aluminate of the composition 11CaO.7Al.sub.2 O.sub.3.CaX.sub. 2 wherein X is any halogen. The cement with added calcium-halogen aluminate has such a short setting time, which is further accelerated by heating during molding, that boards may be successfully made on a continuous basis using a belt-molding machine.