US3638290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing nonwoven fabrics
Assignee: Deering Milliken Research Corp
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Filing: 1970-09-04
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Granted: 1972-02-01
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Expires: 1990-09-04
Abstract
Abstract Apparatus for producing nonwoven scrim fabrics wherein the weft thread sheet-forming support means comprises a helical member having a centrally disposed thread support element extending along the axis of the helical member for supporting the weft thread reaches during weft sheet formation.
Inventors
- 👤 Ralph A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; D04H3/07; D04H3/04; B; B29; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/0854
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
154 words
In apparatus for producing nonwoven net fabrics including a pair of spaced, side-by-side elongate thread support means, means for laying a continuous thread about corresponding adjacent ends of said support means to form a plurality of thread reaches extending between said support means, and means for advancing said reaches along said support means to form a weft thread sheet; the improvement wherein each of said thread support means comprises a helical member, means supporting said member for rotation about its central axis, a thread support element positioned inside said helical member and extending along the central axis thereof for reception and support of loop ends of thread laid thereon by said laying means, and wherein said means for advancing the reaches along said thread support means includes means for rotating said helical members to advance thread placed on said thread support elements in spaced relation along said elements to form the weft thread sheet.
Claim 2
Dependent Claim
154 words
In apparatus for producing nonwoven net fabrics including a pair of spaced, side-by-side elongate thread support means, means for laying a continuous thread about corresponding adjacent ends of said support means to form a plurality of thread reaches extending between said support means, and means for advancing said reaches along said support means to form a weft thread sheet; the improvement wherein each of said thread support means comprises a helical member, means supporting said member for rotation about its central axis, a thread support element positioned inside said helical member and extending along the central axis thereof for reception and support of loop ends of thread laid thereon by said laying means, and wherein said means for advancing the reaches along said thread support means includes means for rotating said helical members to advance thread placed on said thread support elements in spaced relation along said elements to form the weft thread sheet.
Claim 3
Dependent Claim
15 words
Apparatus as defined in claim 1 wherein said element has a relatively smooth outer surface.
Claim 4
Dependent Claim
16 words
Apparatus as defined in claim 1 wherein said element is of varying diameter along its length.
Claim 5
Dependent Claim
26 words
Apparatus as defined in claim 3 wherein said element is flared over at least portion of its length from its end adjacent said thread laying means.
Claim 6
Dependent Claim
36 words
Apparatus as defined in claim 1 wherein said helical member is attached for rotation at one end thereof adjacent said thread laying means and said element is supportably secured to said one end for rotation therewith.
Claim 7
Dependent Claim
15 words
Apparatus as defined in claim 1 wherein said thread support element comprises a rigid tube.
Claim 8
Dependent Claim
14 words
Apparatus as defined in claim 1 wherein said helical member comprises a helical spring.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |