US3668855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Twister and method of twisting
Assignee: Leesona Corp
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Filing: 1970-06-22
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Granted: 1972-06-13
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Expires: 1990-06-22
Abstract
Abstract Method and apparatus are disclosed for imparting false twist to textile strand wherein a plurality of turns of twist are imparted to the strand for each revolution of a friction twister. The disclosed friction twister comprises a single hollow spindle having a pair of oppositely positioned frictional engagement means therein. The twister also includes reversing guide means which allow the strand to enter in a substantially rectilinear path through one end of the axial bore of the spindle, come into engagement with a first one of the frictional engagement means to twist the yarn, pass through the reverse guide means, thereafter contact the second of the frictional engagement means, and finally exit in a generally rectilinear path through a second end of the axial bore of said spindle. In practice with the present invention a single strand or a plurality of strands can be twisted by the use of a single friction twister spindle and a plurality of turns of twister are inserted in the strand or strands for each single revolution of the twister spindle.
Inventors
- 👤 Richmond T Leeson
- 👤 Hans H Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:27
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/08
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
73 words
A method of processing a strand capable of receiving twist comprising the steps of: providing a rotatable member having spaced apart frictional surfaces thereon, directing said strand in a first path to engage a first of said surfaces, directing said strand in a second path to engage a second of said surfaces, rotating said member to thus drive said surfaces and insert twist into said strand, and tensioning said strand during twisting thereof.
Claim 2
Independent Claim
73 words
A method of processing a strand capable of receiving twist comprising the steps of: providing a rotatable member having spaced apart frictional surfaces thereon, directing said strand in a first path to engage a first of said surfaces, directing said strand in a second path to engage a second of said surfaces, rotating said member to thus drive said surfaces and insert twist into said strand, and tensioning said strand during twisting thereof.
Claim 3
Dependent Claim
47 words
The method as set forth in claim 1 including the step of tensioning said strand to a first value as it engages said first surface, and tensioning said strand to a second value greater than said first value as it engages said second surface during twisting thereof.
Claim 4
Dependent Claim
33 words
The method as set forth in claim 1 wherein the step of directing the strand in said second path includes substantially reversing the direction of travel of the strand from said first path.
Claim 5
Dependent Claim
84 words
The method of claim 1 wherein the step of directing the strand in a first path includes moving the strand substantially rectilinearly from a locus remote from said rotatable member into engagement with said first surface, the step of directing the strand in a second path includes reversing the direction of said strand; and including the further step of directing the strand in a third path to remove the strand from engagement with said second surface, said first and third paths being approximately parallel.
Claim 6
Independent Claim
77 words
A method of processing a plurality of strands capable of receiving twist comprising the steps of: providing a rotatable member having spaced apart frictional surfaces thereon, directing each of said strands in a respective first path to engage a first of said surfaces, directing each said strand in a respective second path to engage a second of said surfaces, rotating said member to simultaneously insert twist into each said strand, and tensioning said strands during twisting thereof.
Claim 7
Independent Claim
77 words
A method of processing a plurality of strands capable of receiving twist comprising the steps of: providing a rotatable member having spaced apart frictional surfaces thereon, directing each of said strands in a respective first path to engage a first of said surfaces, directing each said strand in a respective second path to engage a second of said surfaces, rotating said member to simultaneously insert twist into each said strand, and tensioning said strands during twisting thereof.
Claim 8
Dependent Claim
48 words
The method as set forth in claim 5 including the step of tensioning each said strand to a first value as it engages said first surface, and tensioning said strand to a second value greater than said first value as it engages said second surface during twisting thereof.
Claim 9
Dependent Claim
35 words
The method as set forth in claim 5 wherein the step of directing the strands in said second paths includes substantially reversing the direction of travel of each said strand from its respective first path.
Claim 10
Dependent Claim
86 words
The method of claim 5 wherein the step of directing each said strand in a first path includes moving the strand substantially rectilinearly from a locus remote from said rotatable member into engagement with said first surface, the step of directing the strand in a second path includes reversing the direction of the said strand; and including the further step of directing the strand in a third path to remove the strand from engagement with said second surface, said first and third paths being approximately parallel.
Claim 11
Dependent Claim
76 words
Apparatus for imparting twist to an advancing strand comprising, a rotatable member having spaced apart friction means thereon for engagement with said strand, means guiding said strand in a first path to engage a first of said friction means and guiding said strand in a second path to engage a second of said friction means, and drive means for rotating said member to impart twist to the strand engaged on said first and second friction means.
Claim 12
Dependent Claim
76 words
Apparatus for imparting twist to an advancing strand comprising, a rotatable member having spaced apart friction means thereon for engagement with said strand, means guiding said strand in a first path to engage a first of said friction means and guiding said strand in a second path to engage a second of said friction means, and drive means for rotating said member to impart twist to the strand engaged on said first and second friction means.
Claim 13
Dependent Claim
43 words
Apparatus as set forth in claim 9 wherein said rotatable member is elongated, and said first friction means is positioned proximate to a first end of said member and said second friction means is positioned proximate to a second end of said member.
Claim 14
Dependent Claim
34 words
Apparatus as set forth in claim 9 wherein said guiding means is operable to reverse the direction of advance of said strand in guiding the strand from said first to said second friction means.
Claim 15
Dependent Claim
109 words
Apparatus as set forth in claim 9 wherein said rotatable member is a rotatable hoLlow spindle, said first friction means is positioned proximate a first end of the spindle and said second friction means is positioned proximate a second end of the spindle, the strand during twisting approaching said first friction means in a path leading through said hollow spindle and at an angle to insure frictional engagement of the strand with said first friction means, and said strand being directed by said guide means in a path remote from said hollow spindle and at an angle to insure frictional engagement of the strand with said second friction means.
Claim 16
Dependent Claim
37 words
Apparatus as set forth in claim 12 wherein said guide means is operable to substantially reverse the direction of advance of the strand in guiding said strand from said first friction means to said second friction means.
Claim 17
Dependent Claim
27 words
Apparatus as set forth in claim 13 wherein said strand is directed in an exit path from said second friction surface which passes through said hollow spindle.
Claim 18
Dependent Claim
15 words
Apparatus as set forth in claim 9 wherein each said friction means is a ring.
Claim 19
Dependent Claim
43 words
Apparatus as set forth in claim 9 wherein said guiding means includes an elongated grooved element having one of its ends situated proximate the first of said friction means and a second of its ends situated proximate the second of said friction means.
Claim 20
Dependent Claim
83 words
Apparatus for imparting twist to a plurality of advancing strands comprising, a rotatable member having spaced apart friction means thereon for engagement with each said strand, individual guide means for guiding each said strand in a respective first path to engage a first of said friction means and in a second path to engage a second of said friction means, and drive means for rotating said member to impart twist to each of said strands engaged on said first and second friction means.
Claim 21
Dependent Claim
83 words
Apparatus for imparting twist to a plurality of advancing strands comprising, a rotatable member having spaced apart friction means thereon for engagement with each said strand, individual guide means for guiding each said strand in a respective first path to engage a first of said friction means and in a second path to engage a second of said friction means, and drive means for rotating said member to impart twist to each of said strands engaged on said first and second friction means.
Claim 22
Dependent Claim
43 words
Apparatus as set forth in claim 17 wherein said rotatable member is elongated, and said first friction means is positioned proximate to a first end of said member and said second friction means is positioned proximate to a second end of said member.
Claim 23
Dependent Claim
35 words
Apparatus as set forth in claim 17 wherein said guiding means is operable to reverse the direction of advance of each said strand in guiding the filament from said first to said second friction means.
Claim 24
Dependent Claim
113 words
Apparatus as set forth in claim 17 wherein said rotatable member is a rotatable hollow spindle, said first friction means is positioned proximate a first end of the spindle and said second friction means is positioned proximate a second end of the spindle, each said strand during twisting approaching said first friction means in a path leading through said hollow spindle and at an angle to insure frictional engagement of the strand with said first friction means, and each said strand being directed by its respective guide means in a path remote from said hollow spindle and at an angle to insure frictional engagement of each said strand with said second friction means.
Claim 25
Dependent Claim
40 words
Apparatus as set forth in claim 20 wherein each said guide means is operable to substantially reverse the direction of advance of each said strand in guiding each said strand from said first friction means to said second friction means.
Claim 26
Dependent Claim
28 words
Apparatus as set forth in claim 20 wherein each said strand is directed in an exit path from said second friction surface which passes through said hollow spindle.
Claim 27
Independent Claim
126 words
A method of false twisting a strand comprising the steps of, advancing the strand in a path from a supply and through a heated zone, controlling the tension in said strand during heating thereof in said heated zone, applying a first force to the strand at a first position in said path, applying a second force to said strand at a second position in said path and at a locus upstream of said first force, said first position and said second position being aligned with each other to be substantially rectilinear with the path through said heated zone and said first and second forces cooperating to twist the strand in the heated zone and to subsequently untwist the stranD, and finally collecting the false twisted strand.
Claim 28
Independent Claim
126 words
A method of false twisting a strand comprising the steps of, advancing the strand in a path from a supply and through a heated zone, controlling the tension in said strand during heating thereof in said heated zone, applying a first force to the strand at a first position in said path, applying a second force to said strand at a second position in said path and at a locus upstream of said first force, said first position and said second position being aligned with each other to be substantially rectilinear with the path through said heated zone and said first and second forces cooperating to twist the strand in the heated zone and to subsequently untwist the stranD, and finally collecting the false twisted strand.
Claim 29
Dependent Claim
48 words
A method as set forth in claim 23 including the steps of tensioning the strand to a first value as said first force is applied to it, and tensioning the strand to a second value greater than said first value as said second force is applied to it.
Claim 30
Dependent Claim
112 words
Apparatus for false twisting an advancing strand drawn from a strand supply comprising, means providing a heated zone for heating the strand to a temperature to set twist in the same, means for controlling strand tension within said heated zone, means for applying a first force on the strand, means for redirecting the advancing strand, and means for applying a second force thereon upstream of said first force, said first and second forces acting to false twist the strand, and means for taking up the strand after false twisting thereof, both said means for applying a first force and means for applying a second force being carried by a single rotatable member.
Claim 31
Dependent Claim
112 words
Apparatus for false twisting an advancing strand drawn from a strand supply comprising, means providing a heated zone for heating the strand to a temperature to set twist in the same, means for controlling strand tension within said heated zone, means for applying a first force on the strand, means for redirecting the advancing strand, and means for applying a second force thereon upstream of said first force, said first and second forces acting to false twist the strand, and means for taking up the strand after false twisting thereof, both said means for applying a first force and means for applying a second force being carried by a single rotatable member.
Claim 32
Dependent Claim
59 words
Apparatus as set forth in claim 25 wherein said rotatable member is hollow, said means for applying said first and second forces are respective first and second friction rings positioned at spaced loci on said member, and said means for redirecting the advancing strand includes guide means for directing the strand from said first ring to said second ring.
Claim 33
Dependent Claim
137 words
Apparatus for false twisting an advancing strand drawn from a strand supply comprising, means providing a heated zone for heating the strand to a temperature sufficient to afford molecular reorientation of the molecules of the strand while it is twisted, means for controlling strand tension within said heated zone, spaced apart first and second friction means for engagement with the strand to twist the strand in said heated zone and to untwist the strand after removal from said heated zone, single spindle means for rotating said first and second friction means, guide means operable to direct the strand to the first of said friction means for engagement therewith and thereafter substantially reverse the direction of travel of the strand to the second friction means for engagement therewith, and means for taking-up the strand after false twisting thereof.
Claim 34
Dependent Claim
137 words
Apparatus for false twisting an advancing strand drawn from a strand supply comprising, means providing a heated zone for heating the strand to a temperature sufficient to afford molecular reorientation of the molecules of the strand while it is twisted, means for controlling strand tension within said heated zone, spaced apart first and second friction means for engagement with the strand to twist the strand in said heated zone and to untwist the strand after removal from said heated zone, single spindle means for rotating said first and second friction means, guide means operable to direct the strand to the first of said friction means for engagement therewith and thereafter substantially reverse the direction of travel of the strand to the second friction means for engagement therewith, and means for taking-up the strand after false twisting thereof.
Claim 35
Dependent Claim
63 words
Apparatus as set forth in claim 27 wherein said friction means includes elastomeric rings having convex surfaces for engagement of the strand, a one of said rings being mounted at each end of said spindle, and said guide means is operative to cause said strand to wrap about a one of said rings to a greater degree than the other of the rings.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |