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. 23, 1993
Filed:
Apr. 24, 1991
Applicant:
Inventor:
Leonhard Doerner, Oberderdingen, DE;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ; H05B / ;
U.S. Cl.
CPC ...
219542 ; 219467 ; 219548 ; 338299 ; 338226 ;
Abstract
A radiant heater with partly embedded and otherwise projecting heating coils (16) is produced in that the coils (16) are placed in grooves (14) of a tool or mould (13), the interior of the heating coils is partly filled with a filling material (17) and then the dry, pourable insulating material is pressed thereon. Thus, the filling material forms a counter-die and is removed on taking the compressed insulator (21) out of apparatus (11) in that it drops between the heating coils.