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. 20, 1992
Filed:
Feb. 22, 1990
Applicant:
Inventor:
Ronald Post, New Freedom, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B27G / ; B32B / ;
U.S. Cl.
CPC ...
1563804 ; 156581 ; 1562731 ;
Abstract
A film sealing system and method which utilizes the combined application of pressure and high voltage static charge to achieve a high quality seal between two plastic layers of packaging material. Pressure is applied via a sealing bar 40 to evacuate air from between two film layers to be sealed together. A static charge is then applied via a static probe 30. Relatively high pressure air is admitted to a passage which surrounds the static probe. Such air induction of the static charge has been found to intensify the static charge penetration of the film layers and to consequently produce a higher quality film seal.