Patent ID: 7325278

Claim:
A carder comprising: a cylinder configured to have a circumferential cylinder speed of greater than 1500 m/min; and a cylindrical all-steel card clothing having a total height of less than 3 mm and a base width of less than 0.7 mm, the card clothing comprising teeth each of which is defined by a tooth front, a tooth back, a tooth tip, a tooth head surface, and a tooth base, wherein the tooth front of each of the teeth defines a positive front angle (α) of greater than or equal to 0° as measured from vertical, wherein the head surface of each of the teeth defines a head angle (β) which is greater than 85° as measured from vertical and a length of the head surface extending at said head angle (β) from the tooth tip to the tooth back is at least 15% of a length of a tooth pitch defined by the distance between the tooth tips of adjacent teeth.