Different feeding systems require adapted card clothing:

1. Traditional feeding with two or four feed rollers and one cleaning roller: Usually a coarse interlocking wire type V6 or V8 with 60° to 70° angle is applied. Plain rib type card clothing with intermediate wire can also be used. Grooved rollers are occasionally used and are also equipped with plain rib wire. With feed rollers the fiber mat is transported into the card with the back angle and held back with the front angle.
2. Traditional feed table with one roller: The fiber mat is condensed between the feed roller and feed plate and transported to the feed plate tib. This system is primarily used for short fibers (up to 40mm). Here mostly 60° and interlocking type V6 or V8 are used.
3. Overhead feed plate: In this case the fibers are gently fed from above into the carding process by card clothing with very open front angle of 80° to 95°. With a cleaning roller an angle of 80° is used, otherwise 95° is applied.

Separating fiber tufts of the fiber mat must be gentle and secure. Usually front angles from 70° to 90° are used.

Metallic card clothing for licker-ins are subject to particular loads – great frictional force is generated when the tufts are separated of the fiber mat, leading to wear on the card clothing. Moreover, the fiber mat may include contamination of foreign objects which increases wear.

No carding action takes place within the transfer function. The appropriate teeth geometry and the difference in speed ensure that fibers are smoothly transferred from one roller to another. A front angle of 60° successfully has been proven.

Cylinder wires normally are the wires of a card with the lowest total height. Depending on the fiber denier, the wires can have very low to high rib sizes. Cylinder wires work in conjunction with many carding rollers and is thus subject to high loads. Groz-Beckert's product range contains especially durable cylinder wires. The resistance of cylinder wires depends on both the quality of the steel and the manufacturing process.

Standard doffer wires from Groz-Beckert can be smooth or striated. There are also different finishes available so that even very specific applications and every customer desire can be served.

In addition to standard card clothings, Groz-Beckert offers special wires, EvoStep™ and SiroLock™.

1. EvoStep™ is distinguished by a unique undercut on the tooth front. This improves fiber take up and retention by up to 30% compared to conventional wires.
2. SiroLock™ wire has been especially developed to improve fiber transfer and the quality of nonwovens. It features a unique step below the tooth tip.
3. SiroLock™ plus was developed as a successor of the SiroLock™ worker and doffer wire. The result is an optimal SiroLock™ plus product family that enables sophisticated specifications for every customer application.

Relatively low stripper wire rotation is used for low to medium throughput. In this case stripper wires with a front angle of 65° to 75° are recommended. High stripper speeds, applied for high throughput, bear the risk of losing fiber control. To prevent fly, stripper wires similar to worker wires are used.

The condensing process involves a function within the roller card actively carried out with the back angle of the wire teeth. The condensing process is sensitive and can only be carried out with wires that are free of burrs and damage.

Depending on the type of roller card and application, either one or two condenser rollers can be available per doffer. The SiroLock™ wires have proven themselves in systems with two condenser rollers and help to secure the condensing process.

Groz-Beckert take-off roller wires are available in two different geometries, depending on application. They are distinguished by an especially smooth surface created without chemical treatment of the wires.