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. 03, 1990
Filed:
Jul. 27, 1987
Mats G Nilsson, Knivsta, SE;
Sundstrom Safety AB, Lindingo, SE;
Abstract
An apparatus for folding a sheet along concentric circular arcs comprises two series of chain driven comb-shaped folding elements. The folding elements of each series are spaced apart by a distance which is approximately twice the distance between the intended fold locations on the sheet, with the elements of one series being arranged to act against one side of the sheet and the elements of the other series being arranged to act against the other side of the sheet. The folding elements of one series are offset relative to those of the other series a distance equalling the distance between adjacent fold locations on the sheet. The elements of one series increasingly overlap the elements of the other series along the length of the sheet, whereby a plurality of folds are simultaneously being formed progressively as the sheet is fed between the two series of folding elements.