Apparatus on a flat card or roller card having a cylinder and at least one doffer

An apparatus on a flat card or roller card for processing cotton and/or synthetic fibres into sliver, comprising:

• a cylinder and at least one doffer, in which the cylinder and the doffer each have an all-steel clothing having saw teeth, the clothing on the cylinder and the clothing on the doffer each having a point density per square inch (ppsi), wherein the clothing on the doffer has a point density of at least 400 ppsi, and a transfer factor representing a proportion of fibre mass transferred from the cylinder to the doffer per revolution is alterable by a selection of a ratio between the point density of the clothing of the cylinder and the point density of the clothing of the doffer, and
• wherein the ratio of the number of points per square inch (ppsi) of the cylinder and the doffer is smaller than the product of the number of points per square inch of the cylinder and a factor V1, the factor V1 being less than 2.2×10−3.

A carding machine having a cylinder and at least one doffer, each having a clothing with a respective point density per square inch (ppsi), wherein the doffer point density is at least 400 ppsi and a transfer factor representing a proportion of fibre mass transferred from the cylinder to the doffer per revolution is alterable by a selection of a ratio between the cylinder point density and the doffer point density, and

• wherein the ratio of the number of points per square inch (ppsi) of the cylinder and the doffer is smaller than the product of the number of points per square inch of the cylinder and a factor V1, the factor V1 being less than 2.2×10−3.