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:
Mar. 17, 1987
Filed:
Nov. 27, 1985
Rudolf Peters, Lengerich, DE;
Windmoller & Holscher, Lengerich, DE;
Abstract
Folding elements for forming gussets in a tubular film are provided in the mutually opposite open areas between a pair of flattening plates and the plates are reciprocable in the axial direction of the tubular film for an adjustment of the depth of the gussets. The folding elements are mounted to be pivotally movable in all directions and are guided to be transversely displaceable relative to the axis of the tubular film. Adjacent to their mutually opposite, upstream ends the folding elements are provided with adjusting means for imparting a pivotal movement which is transverse to the direction in which the depth of the gussets is adjusted and/or about their longitudinal axes in dependence on a measured deviation of the outer fold lines from their desired position. Sensors are provided for detecting the location of the outer fold lines of the gussets formed in the tubular film.