US3913176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the draft and breaking of synthetic textile fibres
Assignee: TEMATEX SpA
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Filing: 1973-11-19
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Granted: 1975-10-21
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Expires: 1993-11-19
Abstract
Abstract Apparatus for the draft and breaking of synthetic textile fibres which is designed to receive a fibre sliver coming out of a breaking machine and to complete the breaking of those fibres which have not yet been broken, characterized by the fact that the apparatus comprises a draft and breaking unit including a series of successive draft operations carried out at increasing speeds, a transfer unit for receiving the material from the draft and breaking unit and guiding it to a draft gill box for combing and drafting the material and, thereafter, passing it to a collecting device. The draft and breaking unit comprises at least two successive draft fields wherein the length of the first draft field is at least a third longer than the length of the next draft field. The combing operation of the draft gill box is performed by the mutual effect of two sets of vertical faller pins facing each other and operating from the lower and the upper part of the sliver and which are caused to gradually engage the sliver advancing in its traveling direction.
Inventors
- 👤 Oscar Grossi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:38
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/06; D01G1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
247 words
Apparatus for drafting and breaking synthetic textile fibres which remain unbroken subsequently of passage through a breaking machine comprising: drafting and breaking means comprising a plurality of serially arranged drafting and breaking groups each group including an upper and two lower rotatable cylinders having parallel axes and arranged substantially perpendicularly to the direction of feeding of a fibre sliver therethrough, said upper cylinder comprising a pressure cylinder and having an elastically deformable substance on the exterior surface thereof, said lower cylinders comprising driving cylinders and having metallic grooves on the exterior surfaces thereof; feed means for continuously feeding a previously broken fibre sliver to said drafting and breaking means; driving means associated with said driving cylinders for rotating said driving cylinders of each of said drafting and breaking groups, said driving means including transmission means connected to said driving cylinders for transmitting motion from said driving means to said driving cylinders so that the speed of a successive drafting and breaking group is greater than the speed of the preceding drafting and breaking group; draft faller means arranged subsequently of said drafting and breaking means for combing and drafting the fibre sliver; transfer means for receiving the fibre sliver from the last one of said drafting and breaking means and guiding it to said draft gill means, said transfer means comprising a first substantially conical guiding section and a second substantially cylindrical section; and means arranged subsequently of said draft faller means for collecting the fibre sliver.
Claim 2
Dependent Claim
247 words
Apparatus for drafting and breaking synthetic textile fibres which remain unbroken subsequently of passage through a breaking machine comprising: drafting and breaking means comprising a plurality of serially arranged drafting and breaking groups each group including an upper and two lower rotatable cylinders having parallel axes and arranged substantially perpendicularly to the direction of feeding of a fibre sliver therethrough, said upper cylinder comprising a pressure cylinder and having an elastically deformable substance on the exterior surface thereof, said lower cylinders comprising driving cylinders and having metallic grooves on the exterior surfaces thereof; feed means for continuously feeding a previously broken fibre sliver to said drafting and breaking means; driving means associated with said driving cylinders for rotating said driving cylinders of each of said drafting and breaking groups, said driving means including transmission means connected to said driving cylinders for transmitting motion from said driving means to said driving cylinders so that the speed of a successive drafting and breaking group is greater than the speed of the preceding drafting and breaking group; draft faller means arranged subsequently of said drafting and breaking means for combing and drafting the fibre sliver; transfer means for receiving the fibre sliver from the last one of said drafting and breaking means and guiding it to said draft gill means, said transfer means comprising a first substantially conical guiding section and a second substantially cylindrical section; and means arranged subsequently of said draft faller means for collecting the fibre sliver.
Claim 3
Dependent Claim
51 words
Apparatus according to claim 1, wherein the upper and lower cylinders of each of said drafting and breaking groups are each supported at both ends thereof and including means for supporting each drafting and breaking group in adjustable relation to one another in the direction of travel of the fibre sliver.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 2, wherein the spacing between a first pair of said plurality of drafting and breaking groups is at least one third longer than the spacing between a second pair of said groups.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |