Device for communicating a false twist by friction to at least one moving yarn
AssigneeDevtex
InventorsPierre Mirabel, Marcel Schoumacher
Life of this patent
Estimating the term…
Abstract
The device according to the invention enables a false twist to be communicated to a fibrous material. The device includes two endless belts or aprons inclined with respect to each other and mounted on two pairs of rollers. According to the invention, the support rollers supporting the two aprons are mounted on the casing proper of the spindle via two support arms, one of the support arms of each pair being subjected to the action of pressure for ensuring tension of each apron and at least one of the other two support arms being mounted in articulated manner on the casing. Parallelism between the axes of the rollers is not able to be respected.
Claims6
A device for communicating a false twist by friction to a fibrous material, comprising:
- a casing member;
- a first pair of integral support arms mounted on the casing member in a manner to allow easy replacement thereof, said support arms having ends which are each inclined at substantially an equal first angle;
- a first pair of support rollers arranged on said ends of said first pair of integral support arms;
- a first endless belt or apron mounted on said first pair of support rollers;
- a second pair of integral support arms mounted on the casing member in a manner to allow easy replacement thereof, said support arms having ends which are each inclined at substantially an equal second angle, which is inclined with respect to said first angle;
- a second pair of support rollers arranged on said ends of said second pair of integral support arms;
- a second endless belt or apron mounted on said second pair of support rollers, such that a portion of said second endless belt or apron contacts a portion of said first endless belt or apron;
- means for adjusting the tension of each endless belt or apron, said means comprising a pivot pin supported by said casing and inserted through a pivot point of at least one of the support arms of each pair of support arms, said pivot point being located distal from said end of each support arm, and at least one spring member for urging the support arms of each pair of support arms apart;
- means for adjusting the pressure at which the endless belts or aprons contact each other, said means comprising a pivot pin inserted through at least one dim of one of said pairs of support arms, and pressure means for urging said at least one arm in a direction to increase the belt contact pressure;
- and
- means for rotating, connecting, and disconnecting said support rollers;
- wherein said fibrous material is transmitted between the two endless belts or aprons at said portion of contact therebetween, whereby the endless belts or aprons communicate a false twist to the fibrous material and deliver the fibrous material so formed.
Dependencies are inferred from the claim text.