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:
Mar. 29, 1977
Filed:
Jan. 23, 1975
Osterreichische Heraklith Aktiengesellschaft, Radenthein, OE;
Abstract
Shaped, foam plastic parts are made in a lightweight shaped, open trough-like mold having a coherent sheet metal interior comovable insert and related comovable floating lid, wherein said insert is positioned and adapted to slidably elevate within the interior surface of said trough coincident with the expansion of an internally housed and expandable foamable reaction mixture. As the reaction mixture expands, the foam freely expands upwardly during a first stage of the method to at least a height of approximately 50% of that desired for the plastic part. At that point the expanding foam engages an inwardly projecting flange portion of the comovable insert upon which is seated a comovable floating lid. Upon engaging the flange portion, the foam desired plastic part continues to expand through a second stage wherein the comovable insert and seated comovable floating lid are carried upward to a desired final foaming height, thereby forming a homogeneous foamed plastic part having substantially uniform properties throughout.