Patent ID: 6085389
Filing Date: 2000-07-11
Classification: D01G

Abstract:
An apparatus for forming a lap of stock fibers comprising a feed chimney open at top and bottom ends, an expansion chamber having a cross-sectional area and communicating with the feed chimney via at least one exhaust opening having a width, means for taking up the air by suction from inside the expansion chamber comprising an air distribution manifold chamber having a cross-sectional area and designed to be put at reduced pressure and communicating with the expansion chamber via an air takeup slot having a cross-sectional area smaller than the cross-sectional area of the expansion chamber and the cross-sectional area of the air distribution manifold chamber, means enabling the feed chimney to be fed with stock fiber material via the open top end, means of the feed roll type for taking up the stock fiber material and disposed at the open bottom end of the feed chimney, and means for establishing a force flow of densification air between the top end of the feed chimney and the at least one exhaust opening.