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:
Dec. 21, 1982
Filed:
Jul. 20, 1979
Applicant:
Inventors:
Helmut Rehlen, 7951 Ingoldingen, DE;
Jurgen Roellinghoff, 7950 Biberach-Mettenberg, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29D / ;
U.S. Cl.
CPC ...
264284 ; 156209 ; 156269 ; 156270 ; 156279 ; 1563099 ; 156322 ; 156324 ; 156498 ; 156499 ; 264321 ; 428218 ; 4283105 ; 4283142 ; 4283166 ; 428409 ;
Abstract
A process for the continuous modification of the surface portion only of a foamed plastic web to impart high mechanical resistance with retention of air permeability and elasticity comprises preheating the web to a temperature below its melting point, passing the preheated web through the nip of a calendar and withdrawing the web from the calender under tension. The calendar comprises a pressure roller heated to a temperature above the melting point of the web and a backing roller which is not heated.