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. 10, 1980
Filed:
Apr. 05, 1979
Applicant:
Inventor:
Thomas D Tadewald, La Crosse, WI (US);
Assignee:
UOP Inc., Des Plaines, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
156242 ; 156243 ; 156324 ; 219213 ; 219345 ;
Abstract
Conductive or semi-conductive elements which may be utilized as heating elements are manufactured in a continuous process utilizing a method known as pultrusion. The elements are prepared by forming semi-cured sheets comprising a support containing a mixture of a conductive or semi-conductive powder and a resin. The semi-cured sheets are fitted with conductive buss bars to form a conductive or semi-conductive element which is thereafter encapsulated in a glass roving-resin mixture to form the desired element. This element is then pulled through a heated die to effect the desired physical shape and thereafter may be cut to the desired size.