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:
Jun. 23, 1981
Filed:
Sep. 27, 1979
Applicant:
Inventor:
Frank Bosse, Tecklenburg i. W., DE;
Assignee:
Windmoller & Holscher, Lengerich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ; D03D / ;
U.S. Cl.
CPC ...
156 88 ; 156 91 ; 156149 ; 156227 ; 156250 ; 156290 ; 1563084 ; 156475 ; 156529 ; 229 55 ; 428 35 ;
Abstract
Sacks are made from a web comprising a tube of stretched plastics tape fabric woven around a thermoplastic tubular film. The web is continuously fed to a storage device from which two-ply sack lengths are intermittently withdrawn and severed and provided with a stitched base seam. Each severing cut is made to extend through transverse strips of hot-melt adhesive which were applied to both sides of the fabric tube and cooled. After severing and prior to stitching through both plies, the inner ply is provided with a separate base seam by means of welding jaws.