Patent EP0109236A1 successfully refreshed from Google Patents.
EP0109236A1
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EP
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Friction spinning-roller roughness
Assignee: Hollingsworth UK Ltd
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Filing: 1983-11-03
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Granted: —
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Expires: 2003-11-03
Abstract
Abstract Friction spinning apparatus comprises two rollers arranged in parallel closely spaced relationship so as to define therebetween adjacent the line of closets approach a throat and a fibre feed means for feeding fibres into the throat for twisting into yarn as shown in G.B. 2042599. The surface of each of the rollers has a roughness characteristic less than 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).
Inventors
- 👤 Alan Parker
- 👤 William M. Farnhill
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 14:02
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/16; D01H4/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
62 words
Friction spinning apparatus comprising two 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, characterised in that the surface of each of the rotatable members has a roughness characteristic in the range 1 to 6.35 microns.
Claim 2
Dependent Claim
62 words
Friction spinning apparatus comprising two 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, characterised in that the surface of each of the rotatable members has a roughness characteristic in the range 1 to 6.35 microns.
Claim 3
Dependent Claim
31 words
Apparatus according to claim 1, characterised in that the surface roughness characteristic of at least one of the two rotatable members lies in the range of from 1.27 to 6.35 microns.
Claim 4
Dependent Claim
42 words
Apparatus according to claim 1 or 2, characterised in that the surface roughness of the rotatable member which moves into the throat is less than that of the rotatable member which moves out of the throat by from 0.5 to 2.54 microns.
Claim 5
Dependent Claim
17 words
Apparatus according to claim 3, characterised in that-the difference in roughness is from 1 to 2.54 microns.
Claim 6
Dependent Claim
46 words
Apparatus according to claim 3 or 4, characterised in that the surface roughness of the rotatable member which moves into the throat is less than 1.27 microns and the surface roughness of the rotatable member which moves out of the throat is greater than 1.27 microns.
Claim 7
Dependent Claim
44 words
Apparatus according to claim 3 or 4, characterised in that the rotatable member whose surface moves into the throat is perforated and has a surface roughness of 1.27 microns and the other rotatable member is imperforate and has a surface roughness of 3.2 microns.
Claim 8
Dependent Claim
28 words
Apparatus according to any one of claims 1 to 6, characterised in that the rotatable members have had their surface roughness imparted by blasting with an abrasive grit.
Claim 9
Dependent Claim
24 words
Apparatus according to any one of claims 1 to 7, characterised in that the rotatable members have had a hard surface coating applied thereto.
References Cited (Backward Citations)
GB2068025A
Cited
GB2075071A
Cited
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