Carding action:

If two close surfaces have opposite wire direction & their speed direction or relative motion also is opposite, then the action between two surfaces is known as carding action.

Carding action is occurred between flat & cylinder. Here pin direction & rotational direction both are opposite.

Result by the action of carding:

• Maximum individualization of fibres is achieved in this region by opposite spikes.
• Neps, short fibres, dirt & dust are removed.
• The difference of surface speed cylinder & flat is more. So carding actions maximum occurred.

Stripping action:

When two close surfaces have same wire direction & their speed direction or relative motion is also same, then the action between two surfaces is known as stripping action.

Stripping action is occurred between taker-in & cylinder. Here pin direction & rotational direction both are same.

Result by the action of stripping:

• Trash, neps are transferred from cylinder & taker-in & doffing by stripping action.

Doffing action:

When two close surfaces wire point are inclined in opposite direction & their speed direction or relative motion is also same, then the action between two surfaces is known as doffing action.

Doffing action is a special carding. The action takes place between cylinder & doffer. Here pin or wire direction is opposite but rotational or speed direction is same.

Result by the action of doffing:

• We get sliver from doffer (sliver formation).

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