The task of the card consists in refining the fed material up to the highest possible quality. At the same time, a high production is desired and it is expected that the whole process is performed with a minimum of expenses.

To this goal all measures have to subordinate themselves, in the working process in a spinning mill as well as in the developmental workshops of the machine manufacturers or research institutes.

There is no processing stage that changes the form, assignment, condition and composition of the cotton so strongly as the carding process does.