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:
May. 12, 1992
Filed:
Oct. 25, 1990
Applicant:
Inventor:
Uwe Kohn, Bielefeld, DE;
Assignee:
Windmoller & Holscher, Lengerich, DE;
Primary Examiner:
Int. Cl.
CPC ...
B31B / ; B31B / ; B31B / ;
U.S. Cl.
CPC ...
493194 ; 493 24 ; 493 29 ; 493204 ;
Abstract
In a device for transversely welding and cutting tubular film into bags, feed rolls advance the film to a gripping rail which grips the leading end of the film during operation of cutting and welding devices located behind the gripping rail in the direction of feed. To ensure proper tensioning of the film, the feed rollers are reversed after the film is gripped and prior to operation of the cutting and welding devices.