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:
Jun. 15, 1982
Filed:
Jan. 13, 1981
Applicant:
Inventors:
Konrad Brand, Hoehenkirchen, DE;
Dieter Franz, Jettenbach, DE;
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
4283193 ; 264162 ; 264321 ; 264D / ; 428159 ;
Abstract
Mold bodies, for example, for the wings of rotary wing aircraft are formed y densifying a core of a hard foam material under such pressure and temperature conditions that later, when the core is placed into a mold together with the cover layer of a heat curable synthetic material, the core will expand again in response to heating the cover layer to its curing temperature. This expansion causes an intimate, complete bond between the core and the cover layer.