Title: Air-laydown apparatus for forming uniform webs of staple fibers

Abstract: Process and apparatus are disclosed which are suitable for high speed production of uniform, lightweight webs by air-laydown of textile fibers. A toothed disperser roll doffs the fibers into an air stream of high uniform velocity and low turbulence to form a thin fiber stream from which the fibers are deposited in web form on a moving screen. A curved disperser plate, shrouds the disperser roll and prevents premature doffing. By using a disperser plate with a rough surface, preferably one having lateral grooves, web uniformity is remarkably improved.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Contractor, Rashmikant M. (Wilmington, DE, US)
Hwang, Sang-Hak (Newark, DE, US)

Application Number: 497046
Filing Date: 1974-08-09
Publication_date: 1976-01-20
Assignee: E. I. Du Pont de Nemours & Company (Wilmington, DE)
Primary Class(es): 19/306 425/82.1
Other Classes:
US Patent Ref:

2948022	Aug, 1960	Day	19/205.
3268954	Aug, 1966	Voa	19/156.
3797074	Mar, 1974	Zafiroglu	19/156.
3815178	Jun, 1974	Goldman	19/156.

Other Refs:
Primary Examiner: Newton, Dorsey
Assistant Examiner:
Attorney: