Method for producing tubular needle punched felt

Details Method for producing tubular needle punched felt Method for producing tubular needle punched felt

1989-09-06

1990-09-11

Schroeder, Werner H.

Textiles: manufacturing

Textile product fabrication or treatment

Fiber entangling and interlocking

D04H 146

Patent

active

049551167

ABSTRACT:
A method for producing a tubular needle punched felt, comprising the steps of: (a) overlapping not less than two long sheets comprising a web to form thin layer portions at both side edges of the overlapped sheets and a thick layer portion at the central portion of the overlapped sheets by dislocating the sheets in width direction; (b) needle punching one part or whole of the above central thick layer portion of the overlapped sheets to form a lapped sheet; (c) rolling the lapped sheet and transforming the lapped sheet into a tubular one and overlapping the above thin layer portions with each other; and (d) needle punching the above overlapped thin layer portions to make the thin layer portions one body. The tubular needle punched felt obtained in this invention can be suitably used as a tubular felt used in the INS method and the like.

REFERENCES:
patent: 1452704 (1923-04-01), Poulin
patent: 1524681 (1925-02-01), Badger
patent: 2459688 (1949-01-01), De Vyver
patent: 3166823 (1965-01-01), Bernard
patent: 4071394 (1978-01-01), Ball
patent: 4138772 (1979-02-01), Dilo
patent: 4430380 (1984-02-01), Honel
patent: 4762585 (1988-08-01), Schneider
patent: 4845234 (1989-07-01), Schneider

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