US4389752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a staple fibre sliver and apparatus for implementing the method
Assignee: RIETER MACHINE WORKS Ltd A CORP OF SWITZERLAND
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Filing: 1980-07-05
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Granted: 1983-06-28
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Expires: 2000-07-05
Abstract
Abstract The present invention concerns a method and an apparatus for producing a draftable staple fibre sliver (12) from a strand (12) of endless filaments, which is united and condensed for further processing. According to the invention the zone of the united and condensed sliver, from which, due to the cutting process, fibre points stick away inclined and pointed towards the front and outside, is inserted into the inside of the sliver. In this manner the detrimental effects, caused by the fibre points sticking out, are eliminated. Particularly the defective points in the end product produced, caused by these fibre points, are eliminated, fly waste generation in the processing room is reduced and, owing to the reduction of the danger of clogging of the fibre sliver guiding funnels, the operational reliability of the subsequent processing machines is improved.
Inventors
- 👤 Emil Briner
- 👤 Heinz Clement
- 👤 Heiner Eberli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:48
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/06; D01G1/10; D01H; D01H5/00; D01H5/18; D01H5/70; D01H5/72
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A method of producing a draftable staple fibre sliver, comprising the steps of: continuously transporting a strand composed of endless, substantially parallel filaments and possessing a substantially elongate cross-sectional configuration in the longitudinal direction of said strand; cutting the transported strand at intervals at an acute angle relative to its longitudinal direction of movement, to thereby separate the strand into substantially parallelogram-shaped sections; uniting and condensing at both sides thereof the strand thus separated into sections and transforming the strand into a staple fibre sliver of approximately circular cross-sectional configuration; and continually inserting the region of the staple fibre sliver along a generatrix thereof, along which come to lie forwardmost points of the parallelogram-shaped sections during the uniting and condensing of the strand, into the interior of the staple fibre sliver in such a manner that there is formed a staple fibre sliver possessing an approximately kidney-shaped cross-sectional configuration.
Claim 2
Independent Claim
149 words
A method of producing a draftable staple fibre sliver, comprising the steps of: continuously transporting a strand composed of endless, substantially parallel filaments and possessing a substantially elongate cross-sectional configuration in the longitudinal direction of said strand; cutting the transported strand at intervals at an acute angle relative to its longitudinal direction of movement, to thereby separate the strand into substantially parallelogram-shaped sections; uniting and condensing at both sides thereof the strand thus separated into sections and transforming the strand into a staple fibre sliver of approximately circular cross-sectional configuration; and continually inserting the region of the staple fibre sliver along a generatrix thereof, along which come to lie forwardmost points of the parallelogram-shaped sections during the uniting and condensing of the strand, into the interior of the staple fibre sliver in such a manner that there is formed a staple fibre sliver possessing an approximately kidney-shaped cross-sectional configuration.
Claim 3
Dependent Claim
41 words
The method as defined in claim 1, further including the steps of: inserting said region of the staple fibre sliver along said generatrix into the interior of the staple fibre sliver up to a central region of said staple fibre sliver.
Claim 4
Independent Claim
134 words
An apparatus for producing a draftable staple fibre sliver from a strand composed of endless, substantially parallel filaments and possessing a substantially elongate cross-sectional configuration and moved in a predetermined path of travel extending in the longitudinal direction of the strand, comprising: means for laterally uniting and condensing the moving strand into a staple fibre sliver possessing a substantially circular cross-sectional configuration; a rotatable rolling-in roll having an axis of rotation and containing a disc arranged along the path of travel of the staple fibre sliver possessing said approximately circular cross-sectional configuration; and said rolling-in roll protruding into a predetermined region of a generatrix of said sliver containing forwardly protruding points for displacing said region together with said forwardly protruding points of said staple fibre sliver into the interior of the staple fibre sliver.
Claim 5
Independent Claim
134 words
An apparatus for producing a draftable staple fibre sliver from a strand composed of endless, substantially parallel filaments and possessing a substantially elongate cross-sectional configuration and moved in a predetermined path of travel extending in the longitudinal direction of the strand, comprising: means for laterally uniting and condensing the moving strand into a staple fibre sliver possessing a substantially circular cross-sectional configuration; a rotatable rolling-in roll having an axis of rotation and containing a disc arranged along the path of travel of the staple fibre sliver possessing said approximately circular cross-sectional configuration; and said rolling-in roll protruding into a predetermined region of a generatrix of said sliver containing forwardly protruding points for displacing said region together with said forwardly protruding points of said staple fibre sliver into the interior of the staple fibre sliver.
Claim 6
Dependent Claim
44 words
The apparatus as defined in claim 3, wherein: said disc of said rolling-in roll is provided with a rounded-off portion at a zone of a maximum circumference thereof and increases in size from said zone towards said axis of rotation of said rolling-in roll.
Claim 7
Dependent Claim
87 words
The apparatus as defined in claim 3, further including: means for transporting the sliver; said means for uniting and condensing the strand, said rolling-in roll and said transport means for transporting the sliver being successively arranged along said path of travel of said staple fibre sliver; and said staple fibre sliver having respective sliver portions extending from the rolling-in roll in opposite directions towards said uniting and condensing means and said transport means, respectively, and said sliver portions enclosing an angle therebetween which is less than 180°.
Claim 8
Dependent Claim
19 words
The apparatus as defined in claim 5, wherein: said angle is in a range of about 150° to 170°.
Claim 9
Dependent Claim
53 words
The apparatus as defined in claim 3, further including: guide means provided to each side of said disc of said rolling-in roll and arranged in spaced relationship from said disc; said disc having side walls; and said guide means together with said side walls of said disc forming a respective substantially trough-shaped recess.
Claim 10
Dependent Claim
110 words
The apparatus as defined in claim 7, wherein: said disc of said rolling-in roll is provided with a rounded-off portion at a zone of a maximum circumference thereof and increases in size from said zone towards said axis of rotation of said rolling-in roll; a respective roll member provided to each side of said disc of said rolling-in roll; said roll members defining said guide means; said roll members and said disc having neighbouring walls which converge in the direction of the axis of rotation of said rolling-in roll and form a respective trough which continuously surrounds said rolling-in roll; and said walls of said disc defining said side walls.
References Cited (Backward Citations)
US2111139A
Cited
US2187830A
Cited
US2248806A
Cited
US2260383A
Cited
US2206232A
Cited
US2795010A
Cited
CH300885A
Cited
US2908043A
Cited
US2953823A
Cited
US3083414A
Cited
US3209410A
Cited
US3323176A
Cited
FR2112389A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |