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:
Apr. 29, 1986
Filed:
Oct. 26, 1984
Applicant:
Inventor:
Dennis W Ehlers, Green Bay, WI (US);
Assignee:
Paper Converting Machine Co., Green Bay, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B30B / ;
U.S. Cl.
CPC ...
156494 ; 156553 ; 1565835 ; 493193 ; 493205 ; 493208 ;
Abstract
An apparatus for transversely sealing layers of thermoplastic material wherein platen-equipped upper and lower cross bar conveyors are provided for the sealing, there is provided means for jogging the thermoplastic web material incident to heat-up of the platens to prevent scorching of the web and means for stretching the layered web during sealing to overcome the tendency for differential longitudinal shrinkage.