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:
Aug. 08, 1978
Filed:
Jul. 29, 1971
Applicant:
Inventors:
Gunter Helmrich, Grevenbroich, DE;
Fritz Wulfing, Rheydt, DE;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B28B / ; B29G / ;
U.S. Cl.
CPC ...
264 71 ; 264120 ;
Abstract
A method and an apparatus for producing coherent shaped bodies from granular material. The granular material is confined in a mold and the mold is subjected to vibratory motions requisite for compacting the granular material. In accordance with the invention, the granular material is vibrated at its resonant frequency under a light load, then a substantial compressive force is applied to the granular material and the granular material is vibrated at the resonant frequency of the whole vibrating system under compression.