Deutsche Institute Fur Textil-und Faserforschung Stuttgart Stiftung Des Offentlichen Rechts

Institut Fur Textil-und Verfahrenstechnik Denkendorf Der Deutschen Institute Fur Textil-und Faserforschung

Theo Grün

Peter Artzt

Larisa Ausheyks

Stefan Krawietz

The invention relates to a drafting device with twin top front rollers surrounded by aprons in which the aprons are guided around deflection members arranged above the area facing away from the clamping surface of the front roller pair. In order to achieve a low-friction, brake-free and low-wear running of the aprons, they are guided with only a slight tension around the deflection members. For this, the tendency of the aprons to assume a circular form in the circumferential direction is utilized. This tendency brings about, with the appropriately selected interval between the top front rollers and between the surfaces of the deflection members, the low contact pressure on the surfaces striven for and the low tractive tension in the aprons striven for.

Drawing frame with aprons entwined around twin output top delivery rollers

A spinning machine drafting device includes a pressure roller loaded against a lower roller such that a fiber structure is conveyed between the roller pair. The pressure roller has an outer circumferential layer disposed around an inner circumferential layer of different low friction material as compared to the outer layer. The outer layer is thinner than the inner layer and disposed around the inner layer so as to slide relative to the inner layer upon rotation of the pressure roller in operation of the drafting device.

Growing community of inventors

Esslingen, Germany

Theo Grün