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. 12, 1994
Filed:
Oct. 22, 1993
Sabine Rohleder, Weiterstadt, DE;
Jochen Coutandin, Langenlonsheim, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Along a plane sealing zone, a number of plastic film webs are sealed together under pressure and heat application. The plastic film webs run at equal or different distances from one another into the sealing zone and are guided over compression rolls. Between the compression rolls, which lie opposite each other in pairs, the plastic film webs are introduced and subjected to both pressure and heat. The plastic film webs are provided on one or both sides with sealing layers, which are incipiently melted by the action of heat, so that a sealing of the plastic film webs in layers one on top of the other occurs in the sealing zone.