US3802038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crimping of filamentary materials
Assignee: Neumuenstersche Maschinen und Apparatebau GmbH
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Filing: 1971-12-14
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Granted: 1974-04-09
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Expires: 1991-12-14
Abstract
Abstract Filamentary material is crimped by entraining it with a stream of hot gas and inserting it with the stream to an enclosed space having radial venting ports through which the hot gas escape. Into the same space, but in counterflow to the hot gas, a stream of cool gas is admitted so that it will initially flow counter to the hot gas and the direction of advancement of the inserted filamentary material, and will subsequently radially vent through the venting ports. An apparatus for carrying out the method is also disclosed.
Inventors
- 👤 E Bauch
- 👤 J Beitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:52
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12; D02G1/125
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
140 words
A method of crimping filamentary materials, comprising the steps of providing an enclosed space having axially spaced inlets and outlets and radial venting ports intermediate the same; entraining and inserting into said inlet with a stream of hot fluid having a temperature between substantially 180* and 340* C filamentary material to be crimped, so that such material advances towards said outlet and becomes crimped within said space whereas said hot fluid vents radially through said venting ports; and admitting into said space in the region of said outlet a stream of cool fluid for contact with and initial counterflow to the direction of advancement of the crimped filamentary material, and for subsequent radial venting through said venting ports, whereby to uniformly cool the crimped filamentary material in said space prior to withdrawal of the crimped filamentary material from said space.
Claim 2
Independent Claim
140 words
A method of crimping filamentary materials, comprising the steps of providing an enclosed space having axially spaced inlets and outlets and radial venting ports intermediate the same; entraining and inserting into said inlet with a stream of hot fluid having a temperature between substantially 180* and 340* C filamentary material to be crimped, so that such material advances towards said outlet and becomes crimped within said space whereas said hot fluid vents radially through said venting ports; and admitting into said space in the region of said outlet a stream of cool fluid for contact with and initial counterflow to the direction of advancement of the crimped filamentary material, and for subsequent radial venting through said venting ports, whereby to uniformly cool the crimped filamentary material in said space prior to withdrawal of the crimped filamentary material from said space.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1 and comprising the step of advancing said crimped filamentary material through said stream of cool gas to said outlet.
Claim 4
Dependent Claim
23 words
A method as defined in claim 1; and comprising the step of withdrawing the crimped filamentary material from said space through said outlet.
Claim 5
Dependent Claim
20 words
A method as defined in claim 1; further comprising the step of heating said filamentary material prior to entraining thereof.
Claim 6
Dependent Claim
13 words
A method as defined in claim 1; wherein said fluids are gaseous fluids.
Claim 7
Dependent Claim
37 words
A method as defined in claim 1; and further comprising the additional step of maintaining the ambient region surrounding said enclosed space and with which said venting ports communicate, at a pressure slightly below ambient atmospheric pressure.
Claim 8
Dependent Claim
30 words
A method as defined in claim 6, wherein said additional step comprises maintaining said ambient region at a pressure which is between 0.01 and 0.1 atmospheres below ambient atmospheric pressure.
Claim 9
Dependent Claim
30 words
A method as defined in claim 6, wherein said additional step comprises maintaining said ambient region at a pressure which is between 0.02 and 0.04 atmospheres below ambient atmospheric pressure.
Claim 10
Dependent Claim
22 words
A method as defined in claim 6; further comprising the step of regulating the pressure in said ambient region within desired limits.
Claim 11
Dependent Claim
23 words
A method as defined in claim 6; further comprising the step of maintaining the pressure in said ambient region at least substantially constant.
Claim 12
Dependent Claim
22 words
A method as defined in claim 6; further comprising the step of regulating the flow quantity of said stream of hot fluid.
Claim 13
Dependent Claim
26 words
A method as defined in claim 6; further comprising the step of maintaining the flow quantity of said stream of hot fluid at least substantially constant.
Claim 14
Dependent Claim
22 words
A method as defined in claim 6; further comprising the step of regulating the flow quantity of said stream of cool fluid.
Claim 15
Dependent Claim
26 words
A method as defined in claim 6; further comprising the step of maintaining the flow quantity of said stream of cool fluid at least substantially constant.
Claim 16
Dependent Claim
22 words
A method as defined in claim 6; further comprising the step of regulating the temperature of at least one of said fluids.
Claim 17
Dependent Claim
26 words
A method as defined in claim 6; further comprising the step of maintaining the temperature of at least one of said fluids at least substantially constant.
Claim 18
Dependent Claim
22 words
A method as defined in claim 1; further comprising maintaining the temperature of said cool fluid between substantially 4* and 20* C.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |