US3883936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw-crimping textile film strands
Assignee: Individual
•
Filing: 1974-05-10
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Granted: 1975-05-20
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Expires: 1994-05-10
Abstract
Abstract Drawable textile film strands are treated by drawing the same to increased length in a plurality of side-by-side drawing steps and compressively crimping the drawn material, both drawing and crimping being carried out in essentially continuous manner with a minimum of time and space therebetween.
Inventors
- 👤 Robert K Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:00
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
50 words
Continuous draw-crimping process for textile film strands, comprising the sequentially contiguous steps of tensioning a multiplicity of drawable textile film strands and thereby drawing them simultaneously to increased length in a plurality of drawing steps arranged side by side in a drawing zone and then compressively crimping the drawn strands.
Claim 2
Dependent Claim
50 words
Continuous draw-crimping process for textile film strands, comprising the sequentially contiguous steps of tensioning a multiplicity of drawable textile film strands and thereby drawing them simultaneously to increased length in a plurality of drawing steps arranged side by side in a drawing zone and then compressively crimping the drawn strands.
Claim 3
Dependent Claim
15 words
Draw-crimping process according to claim 1, including the step of preheating the strands for drawing.
Claim 4
Dependent Claim
26 words
Draw-crimping process according to claim 2, including maintaining the strands hot during the drawing step and to at least the beginning of the contiguous crimping step.
Claim 5
Dependent Claim
21 words
Draw-crimping process according to claim 3, wherein the strands are maintained at essentially constant temperature from preheating until assuming crimped configuration.
Claim 6
Dependent Claim
72 words
Process comprising slitting a polymeric film sheet into a multiplicity of textile film strands, tensioning the strands and thereby drawing them simultaneously to increased length in a plurality of steps in a drawing zone, each of which steps so treats such strands not so treated in any other such step, forwarding the drawn strands to a contiguous compressive crimping zone and crimping them simultaneously in a crimping step in the crimping zone.
Claim 7
Dependent Claim
72 words
Process comprising slitting a polymeric film sheet into a multiplicity of textile film strands, tensioning the strands and thereby drawing them simultaneously to increased length in a plurality of steps in a drawing zone, each of which steps so treats such strands not so treated in any other such step, forwarding the drawn strands to a contiguous compressive crimping zone and crimping them simultaneously in a crimping step in the crimping zone.
Claim 8
Dependent Claim
47 words
Draw-crimping process according to claim 5, wherein a first plurality of the strands are drawn by a first set of draw rolls in the drawing zone and simultaneously a second plurality of the strands are drawn by a second set of draw rolls in the drawing zone.
Claim 9
Dependent Claim
21 words
Draw-crimping process according to claim 5, wherein all the strands are crimped by a given stuffer crimper in the crimping zone.
Claim 10
Dependent Claim
42 words
Draw-crimping process according to claim 5, wherein a first plurality of the strands are crimped by a first stuffer crimper in the crimping zone and simultaneously a second plurality of strands are crimped by a second stuffer crimper in the crimping zone.
Claim 11
Dependent Claim
46 words
In treatment of textile film strands, the improvement comprising preheating a multiplicity of textile film strands to increased temperature, drawing the hot strands to increased length over a set of draw rolls, and compressively crimping the drawn strands in a plurality of stuffer crimpers arranged side-by-side.
Claim 12
Dependent Claim
46 words
In treatment of textile film strands, the improvement comprising preheating a multiplicity of textile film strands to increased temperature, drawing the hot strands to increased length over a set of draw rolls, and compressively crimping the drawn strands in a plurality of stuffer crimpers arranged side-by-side.
Claim 13
Dependent Claim
29 words
Treatment of textile film strands according to claim 9, including the step of maintaining the temperature of the strands substantially constant from the drawing step to the crimping step.
Claim 14
Dependent Claim
60 words
In treatment of textile film strands, the improvement comprising preheating a multiplicity of textile film strands to increased temperature, drawing the hot strands to increased length over a plurality of sets of draw rolls, each set including input rolls and faster running output rolls over which the strands pass in essentially non-slipping surface contact, and compressively crimping the drawn strands.
Claim 15
Dependent Claim
60 words
In treatment of textile film strands, the improvement comprising preheating a multiplicity of textile film strands to increased temperature, drawing the hot strands to increased length over a plurality of sets of draw rolls, each set including input rolls and faster running output rolls over which the strands pass in essentially non-slipping surface contact, and compressively crimping the drawn strands.
Claim 16
Dependent Claim
29 words
Treatment of textile film strands according to claim 11, including the step of maintaining the temperature of the strands substantially constant from the drawing step to the crimping step.
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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |