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:
Dec. 22, 1981
Filed:
Dec. 11, 1979
Applicant:
Inventors:
Assignee:
Georg Fischer Aktiengesellschaft, Schaffhausen, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164 37 ; 164169 ;
Abstract
For packing granular materials, especially foundry moulding materials, by means of an exothermic reaction of a mixture of air and fuel in a combustion chamber (23), a relative movement between the combustible mixture and one or several pulse triggers (19), is produced during the exothermic reaction, preferably by a blower (20) disposed in the combustion chamber (23). Hence the measured amount of sand introduced into a moulding frame (11) and a filling frame (12) over a pattern (6) by means of a sand container (17) is packed to form a mould body.