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US 12,546,033 B2Granted
Card clothing wire, carding machine and method for producing a nonwoven
AssigneeGroz-Beckert KG
InventorsYuning Zhang, Christian Kreller, Bernhard Bocht, Rainer Grossmann
Life of this patent
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Abstract
A card clothing wire is disclosed, especially for a doffer or a worker of a carding machine, which provides a superior retention of fibers during a carding process and which can be universally used to produce nonwoven webs with an increased grammage or to produce nonwoven webs with a low grammage and an increased quality. In one form, the card clothing wire includes a tooth depth of less than 1.7 mm and an overhanging tip with an undercut.
Claims17
A card clothing wire (1) for a doffer (20), a worker (21), or a stripper (25) of a carding machine (18), the card clothing wire comprising:
- a rib portion which extends in a longitudinal direction (L) of the card clothing wire (1);
- a plurality of teeth (2) which are arranged side by side in the longitudinal direction (L) on the rib portion (17);
- wherein at least one tooth (2) of the plurality of teeth is bounded by a tooth-back (3) on a first side in the longitudinal direction (L);
- wherein the at least one tooth (2) is bounded by a tooth-breast (4) on a second side in the longitudinal direction (L);
- a tip (5) formed between the tooth-back (3) and the tooth-breast (4) at a highest point of the tooth (2) in a height direction (H), wherein the height direction (H) is perpendicular to the longitudinal direction (L);
- an edge-face (6) of the tooth-breast (4) that abuts the tip (5);
- an undercut (7) arranged on the tooth-breast (4) underneath the edge-face (6) in the height direction, wherein the undercut (7) abuts the edge-face (6) and extends towards the tooth-back (3) relative to the edge-face (6);
- a tip angle (15) formed between a tangent of the edge-face (6) and the longitudinal direction (L);
- and
- an undercut angle (16) formed between a tangent of the undercut (7) and the longitudinal direction (L);
- wherein the undercut angle (16) is smaller than the tip angle (15);
- a tooth-root (8) which connects the tooth-breast (4) and the tooth-back (3) of adjacent teeth (2) of the plurality of teeth (2) at their lowest point in the height direction (H);
- wherein a tooth depth (9) measured in the height direction (H) between the tip (5) and
- a lowest point of the tooth-root (8) is smaller than 1.7 mm;
- wherein a curved portion (13) of the tooth-breast (4) abuts the undercut (7) at an end of the undercut (7) which is spaced apart from the edge-face (6), wherein the curved portion has a constant radius of curvature (R).
12 more elements
Dependencies are inferred from the claim text.