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:
Jul. 16, 1991
Filed:
Nov. 20, 1989
Applicant:
Inventor:
John S Thomas, Jr, Williamsburg, VA (US);
Assignee:
Rampart Packaging Inc., Williamsburg, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B30B / ;
U.S. Cl.
CPC ...
156498 ; 53300 ; 53341 ; 156 69 ; 156537 ; 1565831 ;
Abstract
A method and apparatus are disclosed for heat sealing two thermoplastic parts by clamping the parts together with a cooled clamp so that the edges of the parts are exposed and melting the edges together by contacting them with a hot seal head wherein a layer of a protective material is interposed between the hot seal head and the parts to be sealed.