US3801252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing filamentary and fibrous textile products from thermoplastic film
Assignee: Scragg & Sons
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Filing: 1972-01-19
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Granted: 1974-04-02
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Expires: 1992-01-19
Abstract
Abstract Textile filamentary and fibrous products are made from thermoplastic film by forging the film between a hot roller with circumferential ribs and grooves and a hot film support roller, so that latent filament characteristics are imparted to the film, the process including the feature that the film is stretched longitudinally immediately before the forging step. Further process features include further stretching of the forged film in one or more zones, in one of which the film is split into filaments, while being stretched, by a transversely disposed pin which has the same pattern of ribs and grooves as has the film, and also has a lengthwise groove which the film bridges as it runs over the splitter pin.
Inventors
- 👤 G Waterhouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:28
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423; Y; Y10; Y10S; Y10S264/00; Y10S264/47
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
147 words
In an apparatus for manufacturing filamentAry and fibrous textile products from thermoplastic film, a combination comprising film embossing means for embossing an advancing thermoplastic film so as to form latent filament characteristics therein, comprising a surface-contoured forging roller die and a heated film support roller which together define a nip for advancement therethrough of thermoplastic film to be embossed; film engaging rollers upstream of said film embossing means for feeding and guiding the engaged film in direction toward said means; film stretching rollers downstream of said embossing means for stretching the embossed film longitudinally of the same; drive means for driving said rollers and said roller die, and for rotating at least said film engaging rollers and said roller die at differential speeds to stretch said film longitudinally of the latter immediately upstream of said nip; and film splitting means for splitting the embossed film into filaments.
Claim 2
Dependent Claim
147 words
In an apparatus for manufacturing filamentAry and fibrous textile products from thermoplastic film, a combination comprising film embossing means for embossing an advancing thermoplastic film so as to form latent filament characteristics therein, comprising a surface-contoured forging roller die and a heated film support roller which together define a nip for advancement therethrough of thermoplastic film to be embossed; film engaging rollers upstream of said film embossing means for feeding and guiding the engaged film in direction toward said means; film stretching rollers downstream of said embossing means for stretching the embossed film longitudinally of the same; drive means for driving said rollers and said roller die, and for rotating at least said film engaging rollers and said roller die at differential speeds to stretch said film longitudinally of the latter immediately upstream of said nip; and film splitting means for splitting the embossed film into filaments.
Claim 3
Dependent Claim
22 words
A combination as defined in claim 1; and further comprising cooling means for cooling the embossed film immediately downstream of said nip.
Claim 4
Dependent Claim
18 words
A combination as defined in claim 1, wherein said film splitting means comprises a stationary film splitting device.
Claim 5
Dependent Claim
31 words
A combination as defined in claim 1, wherein said drive means comprises drives operative for rotating said film engaging rollers and said roller die at lower and higher peripheral speeds, respectively.
Claim 6
Dependent Claim
53 words
A combination as defined in claim 1, wherein said drive means comprises drives operative for rotating said film engaging rollers at a first peripheral speed, said roller die at a second peripheral speed higher than said first speed, and said film stretching rollers at a third peripheral speed higher than said second speed.
Claim 7
Dependent Claim
69 words
A combination as defined in claim 1, wherein said film splitting means comprises at least one member extending transversely of the direction of advancement of said film and having an arcuate surface portion provided with surface contouring corresponding to that of the embossed film, an additional surface portion spaced from said arcuate surface portion in said direction by a gap, and heating means for heating said arcuate surface portion.
Claim 8
Dependent Claim
17 words
A combination as defined in claim 6, wherein said additional surface portion is an arcuate surface portion.
Claim 9
Dependent Claim
17 words
A combination as defined in claim 6, wherein said additional surface portion is a flat surface portion.
Claim 10
Dependent Claim
31 words
A combination as defined in claim 6, wherein said member is a rod having an arcuate circumference provided with said arcuate surface portion and with an axial groove constituting said gap.
Claim 11
Dependent Claim
28 words
A combination as defined in claim 9, wherein said circumference of said rod is provided with an additional axial groove, and wherein said film bridges said grooves sequentially.
Claim 12
Dependent Claim
62 words
A combination as defined in claim 9, wherein said groove is bounded by two flat sidewalls one of which is located downstream of the other with reference to the direction of advancement of said film, said one flat sidewall extending at least substantially radial to said arcuate surface portion and being inclined at substantially 90* with reference to said other flat sidewall.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |