Needling device

• US 9,115,449 B2
• Filed: 02/24/2012
• Issued: 08/25/2015
• Est. Priority Date: 03/01/2011
• Status: Active Grant

• Current Assignee: Burckhardt Of Switzerland AG
• Original Assignee: Burckhardt Of Switzerland AG
• Inventors: Burckhardt, Theodor, Hausdorf, Heiner, Jermann, Thomas, Wisson, Francis
• Primary Examiner(s): VANATTA, AMY B
• Application Number:
  US14/002,295
• Publication Number:
  US 20130333171A1
• Time in Patent Office: 1,278 Days
• Field of Search: 281/15, 281/70
• US Class Current: 1/1
• CPC Class Codes: B26D 1/0006 Cutting members therefor
• CPC Class Codes: B26F 1/14 Punching tools; Punching dies
• CPC Class Codes: B26F 1/20 with tools carried by a rotating drum or similar support B26F1/22 takes precedence
• CPC Class Codes: D01D 5/426 by cutting films
• CPC Class Codes: D04H 13/02 Production of non-woven fabrics by partial defibrillation of oriented thermoplastics films
• CPC Class Codes: D04H 18/00 Needling machines
• CPC Class Codes: D04H 18/02 with needles

Abstract

A needle device for processing an in particular strip-shaped planar structure comprises a needle bed, on which a plurality of needle elements provided with tips are arranged in such a manner that the needle elements protrude from the needle bed and the tips thereof point away from the needle bed. The needle elements are designed as flat blades each of which having at least one cutting edge extending from the tip of the needle element toward the needle roller. The needle elements are fastened via leg-shaped mounting members in bar-like needle carriers, which are in turn inserted in grooves of the needle roller.

Claims

1. A needle device with a needle bed, on which a plurality of needle elements provided with tips are arranged in such a manner that the needle elements protrude from the needle bed and the tips thereof point away from the needle bed, wherein the needle elements are flat blades each of which having at least one cutting edge extending from the tip of the needle element toward the needle bed, and are inserted in bar-shaped needle carriers, which are in turn fastened on or in the needle bed, wherein the portions of the needle elements protruding from the needle bed each have a substantially triangular shape, wherein the portions of the needle elements protruding from the needle bed each have a base edge located opposite the tip and two side edges extending from the base edge to the tip, wherein at least one of the side edges is a cutting edge, and wherein the needle elements comprise two leg-shaped mounting members extending away from the base edge for fastening to the needle carrier.

2. The needle device according to claim 1, wherein each of the two side edges forms a cutting edge.

3. The needle device according to claim 1, wherein the needle carriers have mounting openings in which the leg-shaped mounting members of the needle elements engage.

4. The needle device according to claim 1, wherein the needle elements are supported with their base edges on the needle carriers.

5. The needle device according to claim 3, wherein the needle elements are glued into the bar-shaped needle carriers by their mounting members.

6. The needle device according to claim 3, wherein the bar-shaped needle carriers each have two side parts inclined toward one another and a bridge part connecting said side parts, the mounting openings are each arranged in the bridge part of the needle carriers, the leg-shaped mounting members of the needle elements pass through the mounting openings and extend into a hollow space formed in the needle carriers by the side parts and the bridge part of the needle carriers, and that the hollow space is filled with an adhesive at least in the area of the mounting members.

7. The needle device according to claim 1, wherein the bar-shaped needle carriers are inserted removably in grooves of the needle bed.

8. The needle device according to claim 1, wherein the needle elements are orientated on the needle carriers in such a manner that the flat sides or centre planes thereof are at an angle from 0°

-90°

to a normal plane perpendicular to a longitudinal direction of the needle carriers.

9. The needle device according to claim 1, wherein the needle bed is a needle roller.

10. The needle device according to claim 8, wherein the needle elements are oriented on the needle carriers in such a manner that the flat sides or centre planes thereof are at an angle of 0°

to a normal plane perpendicular to a longitudinal direction of the needle carriers.