Title: Apparatus for producing needled, non-woven tubing

Abstract: An apparatus for continuously producing needled, non-woven tubing by winding a web on a stationary mandrel, multi-needling overlying turns and frictionally driving the formed tube about the periphery of the mandrel. The mandrel is tapered to accomodate shrinkage of the tube and to assist ejection of the formed tube without application of longitudinal tension on the formed tube. The mandrel preferably includes a helical surface for progressively ejecting the rotating tubing from the static mandrel. The tube product may be formed with diameters as low as 4 millimeters and walls as thin as 0.5 millimeters and is radially compressed immediately after needling.

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Inventors: Dilo, Richard (Eberbach-N, DE, US)

Application Number: 835329
Filing Date: 1977-09-21
Publication_date: 1979-02-13
Assignee: Rontex America Inc. (Chelmsford, MA)
Primary Class(es): 28/110
Other Classes:
US Patent Ref:

2941915	Jun, 1960	Manning	156/173.
3116533	Jan, 1964	O'Byrne	28/110.
3150434	Sep, 1964	O'Byrne	28/114.
3497413	Feb, 1970	Ullman et al.	156/446.
3508307	Apr, 1970	Dilo	28/110.
3530557	Sep, 1970	Dilo	28/110.
3673024	Jun, 1972	Eriksson	28/110.
3758926	Sep, 1973	Dilo	28/110.
3890681	Jun, 1975	Fekete et al.	28/107.
3909893	Oct, 1975	Wilde	28/110.
3952121	Apr, 1976	Dilo	28/110.

Other Refs: 48-3083

Jan, 1973	JP

Primary Examiner: Mackey, Robert
Assistant Examiner:
Attorney: Sherman & Shalloway