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US 7,114,226 B2Granted
Needle for needling flat textile fabrics
AssigneeGroz-Beckert KG
InventorGustav Wizemann
Life of this patent
Estimating the term…
Abstract
A needle (1) according to the invention serves for the after-treatment, particularly after-needling of flat textile products, particularly for roughening of the product surface. The needle (1) is of fully symmetrical construction with respect to the central longitudinal axis (11); this applies particularly also to its barbs. The needle gauge is at least 46 and the barb depth is 0.02 mm at the most. The needle ensures a gentle, protective operation and the making of particularly fine textiles.
Claims12
An after-treatment needle (1) for flat textile products, comprising
- an axially elongated needle body (2) having at one end a clamping part (4) and at another end a working part (5) provided with n number of edges (6, 7, 8, 10) extending in the axial direction of the needle body (2) and having a cross-sectional height of less than 0.35 mm, wherein n equals to or is greater than three, and
- adjoining barbs (12, 13) arranged at least at two edges (6, 7);
- the adjoining barbs (12, 13) have a depth which is less than 0.02 mm and are arranged pair-wise in the same axial position or on a helical line, whose pitch (G) is less than n times the length of the barb (12).
Dependencies are inferred from the claim text.