Low air pressure method and apparatus for forming filter rods

Details Low air pressure method and apparatus for forming filter rods Low air pressure method and apparatus for forming filter rods

A - Human Necessities

24

B

131/83

A24B 3/00 (2006.01) A24D 3/02 (2006.01)

Patent

CA 1204645

ABSTRACT The present invention relates to high speed process and ap- paratus suitable for the preparation of cigarette filter rods having high tow utilization in terms of pressure drop per unit rod weight without producing substantial tow density variations. In accordance with this invention, it has been discovered that in a process for manufacturing filter elements from opened and deregistered crimped continuous filament tow, wherein said tow is conducted from a mechan- ical forwarding means through an aspirating jet positioned adjacent a compacting means and wherein means are provided for dissipating aspirating fluid, that filter rod pressure drop and weight variations are reduced by aspirating at low pressures and more specifically, at fluid pressures of not more than about 3 pounds per square inch gauge and by causing the aspirating fluid, at its point of contact with the continuous filament tow, to flow substantially in a direction axial to that of the tow.

443520

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