US3791132A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sizing textile fibres
Assignee: CENTRE TECHN IND INST TEXTILE DE FR FR
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Filing: 1971-12-01
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Granted: 1974-02-12
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Expires: 1991-12-01
Abstract
Abstract Process for sizing slivers or rovings of textile fibres in which the slivers or rovings are unwound from a supply thereof and are accelerated progressively and smoothly to a given speed by a pulling force which is always less than the cohesion force between the fibres constituting the slivers or rovings. The slivers or rovings are then flattened by passing between a first pair of pressure rollers, before dipping into a bath of size and then passing through a second pair of pressure rollers to be forwarded onto a drier for drying the size whereafter they are wound up on a bobbin. The size has the effect of gluing the fibres of slivers or rovings together and imparts sufficient cohesion for the slivers or rovings to be worked as such in a loom or knitting machine. The size may subsequently be removed after manufacture of a textile article from the slivers or rovings.
Inventors
- 👤 R Schutz
- 👤 P Exbrayat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:03
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A process for sizing slivers or rovings of textile fibres while maintaining said fibres substantially in their initial state as slivers or rovings whereby said fibres may be worked without substantial deformation, said process comprising the steps of: a. unwinding the slivers or rovings from a feed bobbin by applying a pulling force to the slivers or rovings progressively and smoothly to accelerate the slivers or rovings to a given speed, said pulling force always being less than the cohesion force between the fibres constituting the slivers or rovings; b. flattening the silvers or rovings; c. guiding the slivers or rovings in their flattened state through a bath of size; d. drying the sized slivers or rovings; and e. winding up the sized and dried slivers or rovings on a rewind bobbin.
Claim 2
Dependent Claim
132 words
A process for sizing slivers or rovings of textile fibres while maintaining said fibres substantially in their initial state as slivers or rovings whereby said fibres may be worked without substantial deformation, said process comprising the steps of: a. unwinding the slivers or rovings from a feed bobbin by applying a pulling force to the slivers or rovings progressively and smoothly to accelerate the slivers or rovings to a given speed, said pulling force always being less than the cohesion force between the fibres constituting the slivers or rovings; b. flattening the silvers or rovings; c. guiding the slivers or rovings in their flattened state through a bath of size; d. drying the sized slivers or rovings; and e. winding up the sized and dried slivers or rovings on a rewind bobbin.
Claim 3
Dependent Claim
16 words
A process as claimed in claim 1, wherein the pulling force is less than 50 cN.
Claim 4
Dependent Claim
51 words
A process as claimed in claim 1 and further comprising the step of turning the slivers or rovings around their axis at several turns per meter during said unwinding thereof, said turning being to the extent effective for removal of twists existing in said slivers or rovings prior to said unwinding.
Claim 5
Dependent Claim
18 words
A process as claimed in claim 1 and further comprising the step of oiling the slivers or rovings.
Claim 6
Dependent Claim
44 words
A process as claimed in claim 1 and further comprising the step of supporting the slivers or rovings before said flattening step on a support and transport filament and separating the slivers or rovings from said filament before the end of the drying step.
Claim 7
Dependent Claim
43 words
A process as claimed in claim 1, wherein the size is selected from the group consisting of a solution of pure polyvinyl alcohol, a solution of polyvinyl alcohol wherein the polyvinyl alcohol contains acetyl and sulphate groups, and a solution of acrylic copolymer.
Claim 8
Dependent Claim
13 words
A process as claimed in claim 6, wherein said size contains a plasticizer.
Claim 9
Dependent Claim
26 words
A process as claimed in claim 1, wherein the size is capable of being dissolved from the sized slivers or rovings when in the dry state.
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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |