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:
Oct. 23, 1984
Filed:
Aug. 30, 1983
Jitsumi Shinmoto, Tokyo, JP;
Tomi Machinery Manufacturing Co., Ltd., Tokyo, JP;
Abstract
To the end of producing high quality film from thermo-plastic resin through inflation molding, there is provided an air ring which has a plurality of slits for guiding cooling air therethrough onto the film. These slits are defined by a plurality of frusto-conical channel defining bodies which are arranged like a set of nested boxes and are provided with different exit angles at their outlets. Through appropriate distribution of the air outlets for cooling the film, a uniform inflation molding becomes possible, allowing a greater molding speed at the same time. The broader ends of the channel defining bodies are mutually threaded in such a manner that they may be independently adjusted along an axial direction. With additional provision of a retractable annular plate at the outlet of a main cooling air channel and proper adjustment of the channel defining bodies, the air ring may be adapted to molding dies of different diameters.