| 主权项 |
1. A card wire (100, 300, 400), comprising:
a rib portion (103, 303, 403); and a plurality of teeth (105, 305, 405) along a length of the rib portion (103, 303, 403), wherein the plurality of teeth (105, 305, 405) are inclined at an angle with respect to the rib portion (103, 303, 403), wherein the teeth have a front portion (107,307,407) and a back portion (109, 309, 409), wherein the front portion (107, 307, 407) is an inner portion of the tooth leaning towards the rib portion (103, 303, 403) and the back portion (109, 309, 409) is an outer portion of the tooth, wherein the front portion (107, 307, 407) and the back portion (109, 309, 409) of the tooth join at a tip of the tooth (111, 311, 411); wherein the teeth have a base segment (113, 313, 413) connecting the front portion (107, 307, 407) of one of the teeth to the back portion (109, 309, 409) of a preceding tooth; wherein the front portion (107,307,407) comprises at least two undercut segments (120, 130; 320, 330; 420, 430) including a first undercut segment (120, 320, 420) and a second undercut segment (130, 330, 430); wherein the second undercut segment (130, 330, 430) is spaced further away from the tip of the tooth (111, 311, 411) than the first undercut segment (120, 320,420); wherein each undercut segment (120, 130; 320, 330; 420, 430) has an undercut angle (α, β); wherein the undercut angle (α, β) is the minimum of the angles with a longitudinal direction of the card wire of the tangents to each point of the undercut segment going—when observed from the tip—inwards from the front portion (107, 307, 407); wherein the second undercut segment (130, 330, 430) has a larger undercut angle (β) than the first undercut segment (α). |
