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. 22, 1983
Filed:
Aug. 24, 1981
Applicant:
Inventors:
Ronald D Cluett, Gloucester, MA (US);
Richard L Mitchell, Manchester, MA (US);
Assignee:
Gloucester Engineering Co., Inc., Gloucester, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264 23 ; 264 401 ; 264 403 ; 264564 ; 425140 ; 425155 ; 4251742 ; 4253261 ;
Abstract
An internally cooled blown film system, for producing a plastic tube, in which the flow rate of the continuous flow of cooling air through the tube is made directly dependent upon deviation of the tube circumference as determined by transmission and detection of ultrasonic waves from the surface of the tube.