Covering for drafting rollers
AssigneeDeutsche Instistute fur Textil-und Faserforschung Stuttgart Stiftung des offentlichen Rechts
InventorsPeter Artzt, Larisa Ausheyks, Theo Grün
Life of this patent
Estimating the term…
Abstract
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.
Claims25
A spinning machine drafting device, comprising:
- a roller pair including a pressure roller loaded against a lower roller such that a fiber structure is conveyed between said roller pair for drafting;
- an inner layer of a deformable flexible material attached completely around the circumference of said pressure roller without relative movement between said inner layer and said pressure roller;
- an outer circumferential layer of a generally inelastic material disposed around at least a portion of the outer circumference of said inner layer, said outer layer being thinner than said inner layer and disposed around said inner layer so as to slide relative to said inner layer upon rotation of said pressure roller in operation of said drafting device.
An outer layer component for use in a covering combination over a pressure roller of a pair of rollers in a drafting device for spinning machines, wherein the covering combination includes an inner layer formed of a flexible and deformable material disposed entirely around the pressure roller with essentially no relative movement between the pressure roller and inner layer, and the outer layer component is disposed around at least a portion of the circumference of the inner layer and slides relative to the inner layer upon rotation of the pressure roller in operation of the drafting device, said outer layer component formed from a generally inelastic material and being thinner than the inner layer said covering comprising substantially no expansion in a direction transverse to the rotational axis of said pressure roller.
Dependencies are inferred from the claim text.