Apparatus for needling a non-woven material

Details Apparatus for needling a non-woven material Apparatus for needling a non-woven material

2007-12-18

2007-12-18

Vanatta, Amy B. (Department: 3765)

Textiles: manufacturing

Textile product fabrication or treatment

Fiber entangling and interlocking

C028S114000

Reexamination Certificate

active

11588758

ABSTRACT:
An apparatus is described for needling a non-woven material with at least one needleboard (23) which is connected with push rods (26) guided in the needle-penetration direction and with at least one drive for the needleboard (23) acting upon the push rods (26). In order to provide advantageous drive conditions it is proposed that the drive is arranged as a hydrostatic resonance drive which comprises at least one working cylinder (1) with a piston (2) pressurized on both sides by a hydraulic spring (4, 5) each and a device for pressurizing the piston (2) with a frequency which corresponds to the resonance frequency of the oscillation system obtained from the moved masses and the hydraulic springs (4, 5).

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