DEVICE AND PROCESS FOR FOLDING WEB MATERIALS
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United States of America Patent
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Issued Date -
Dec 13, 2012
app pub date -
Feb 8, 2011
filing date -
Feb 26, 2010
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Abstract
A device for making, on a web element (W), which is advancing, a fold along a line of fold (W3) oriented in the direction of advance of the web so as to bring a first portion (W1) and a second portion (W2) of the web element (W), originally situated on opposite sides of the line of fold (W3), to assume a folded configuration, in which the second portion (W2) is turned over on the first portion (W1). The device comprises:—a surface of feed (10) for feeding the first portion (W1) of the web element (W), the surface having an edge (100), which defines the aforesaid line of fold (W3); and—a motor-driven belt conveyor (20), set alongside the surface of feed (10) along the folding edge (100) for conveying the second portion (W2) of the web element (W) subjected to folding; the belt conveyor (20) extends according to a path of twisting around said folding edge (100). The twisting path carries the top branch of the belt conveyor (20), initially coplanar with the aforesaid surface of feed (10), to turn over and superimpose itself on the surface of feed (10) causing V-shaped folding of the web element W.
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