Needled felt filter bags and method for forming same

Details Needled felt filter bags and method for forming same Needled felt filter bags and method for forming same

1993-06-23

1995-05-16

Calvert, John J.

Textiles: manufacturing

Textile product fabrication or treatment

Fiber entangling and interlocking

28109, 383102, 383107, 55381, 493224, B32B 104, D04H 146, B01D 4602, B65D 3010

Patent

active

054149150

ABSTRACT:
Multiple filter bags are formed from a layered composite sheet of two, essentially identical fibrous or felt layers by needling a plurality of transverse paths each 0.75 to 1.5 inches wide on the composite sheet, the paths being spaced 4-18 inches apart so as to form a plurality of tubular shaped channels. The needled transverse paths are then slit longitudinally along a central line so as to form separate elongated tubes, which are then cross cut apart transversely to produce segments of any desired length such as 12-36 inches. These segments are each final closed at one end of each segment by needling or stitching to form multiple filter bag structures. The invention also includes the felt filter bags produced by this method of manufacture.

REFERENCES:
patent: 3431611 (1969-03-01), Rentz
patent: 3537241 (1970-11-01), Wiegel et al.
patent: 3843485 (1974-10-01), Doll et al.
patent: 3955515 (1976-05-01), Elsas
patent: 4197343 (1980-04-01), Forsythe
patent: 4410441 (1983-10-01), Davies et al.
patent: 4955116 (1990-09-01), Hayamizu et al.

Affiliated with

Also associated with

Rating

Needled felt filter bags and method for forming same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Needled felt filter bags and method for forming same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Needled felt filter bags and method for forming same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-630389