Rollers for friction spinning apparatus
AssigneeHollingsworth (U.K.) Limited
InventorsAlan Parker, William M. Farnhill
Life of this patent
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Abstract
Friction spinning apparatus comprises two rollers arranged in parallel closely spaced relationship so as to define therebetween adjacent the line of closest approach a throat and a fibre feed means for feeding fibres into the throat for twisting into yarn as shown in G.B. No. 2042599. The surface of each of the rollers has a roughness characteristic at most 250 micro inches (6.25 microns) and the roller having its surface moving from the fibre feed means into the throat has a roughness less than that of the other roller by from 20 to 100 micro inches (0.5 to 2.54 microns).
Claims10
In a friction spinning apparatus comprising first and second rotatable members arranged in closely spaced relationship so as to define therebetween adjacent the line of closest approach a throat, and a fibre feed means for feeding fibres into the throat for twisting into yarn, the fibre feed means opening at one side of said line of closest approach at which said first rotatable member has its surface moving into said throat and the second rotatable member has its surface moving out of the throat;
- the improvement wherein:
- the surface of each of the rotatable members has a roughness characteristic of from 40 to 250 micro inches.
In friction spinning apparatus comprising first and second rotatable members arranged in closely spaced relationship so as to define therebetween adjacent the line of closest approach a throat, and a fibre feed means for feeding fibres into the throat for twisting into yarn, the fibre feed means opening at one side of said line of closest approach at which said first rotatable member has its surface moving into said throat and said second rotatable member has its surface moving out of said throat;
- the improvement wherein:
- the surface of each of the rotatable members has a roughness characteristic at most 250 micro inches and the surface roughness of said first rotatable member is less than that of said second rotatable member by from 20 to 100 micro inches.
Dependencies are inferred from the claim text.