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. 24, 1976
Filed:
Oct. 07, 1974
Applicant:
Inventor:
Charles R Sperry, Wilton, CT (US);
Assignee:
Instapak Corporation, Danbury, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B67D / ;
U.S. Cl.
CPC ...
2221 / ; 219307 ; 219328 ;
Abstract
A polyurethane foam dispensing system wherein electrical lines in the conduits thereof are used to controllably heat the foam precursor materials and to maintain such material at optimum temperature for foam formation. A thermistor at the dispensing end of such conduits senses the temperature of the throughput material and controls the heating element(s) by feedback therefrom.