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. 09, 1981
Filed:
Mar. 15, 1979
Applicant:
Inventor:
Charles M Schott, Jr, Atkinson, NH (US);
Assignee:
Gloucester Engineering Co., Inc., Gloucester, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29F / ; B29D / ;
U.S. Cl.
CPC ...
425 / ; 264569 ; 4253261 ; 425445 ;
Abstract
Air ring for cooling a hot extruding tube of plastic film in which a lubricating air bleed port communicates with air from the air ring plenum independent of the cooling air flow path. The bleed port communicates with a bleeded air passage that extends to an annular lubricating air outlet positioned in advance of a guide surface that precedes the cooling air outlet. In an exterior air ring a valve arrangement limits the bleeded flow to the minimum desired.