Patent US3798718A successfully refreshed from Google Patents.
US3798718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stuffer-crimping yarn
Assignee: Bancroft & Sons Co J
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Filing: 1971-05-21
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Granted: 1974-03-26
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Expires: 1991-05-21
Abstract
Abstract Apparatus for crimping yarn in which a pair of feed rolls feeds the yarn against a conveyor belt which passes between the rolls adjacent the bite and advances parallel to the axes of the rolls. The belt carries the crimped yarn from the crimping zone at the bite over a heated surface where the crimp is set. Alternative embodiments add a second conveyor belt or a pair of helical screw members in opposed cooperating relationship with the first conveyor belt to carry the crimped yarn from the crimping zone.
Inventors
- 👤 A Trifunovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:19
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
212 words
Apparatus for crimping yarn comprising: a pair of driven feed rolls having a bite through which yarn is fed for crimping, a first driven conveyor belt mounted to pass between said feed rolls adjacent the bite and parallel to the axes of said feed rolls, said first conveyor belt cooperating with said feed rolls to form a crimping zone wherein the yarn is crimped as it is fed from said bite against the surface of said first conveyor belt, a second driven conveyor belt disposed in opposed relationship to said first conveyor belt and cooperating therewith to form a confined area along which said crimped yarn is moved, said second conveyor belt being mounted on a plurality of belt rollers, one of said belt rollers being in juxtaposition to said crimping zone, and a transfer bridge spanning the gap between said crimping zone and said second conveyor belt to facilitate smooth passage of yarn from said crimping zone to said second conveyor belt, said transfer bridge comprising a plate having an opening therethrough for the passage of yarn and a first filler element aligned with said opening and wipingly engaging said feed rollers at the bite thereof to insure that yarn cannot intrude between said rotating feed rollers and said transfer bridge.
Claim 2
Dependent Claim
212 words
Apparatus for crimping yarn comprising: a pair of driven feed rolls having a bite through which yarn is fed for crimping, a first driven conveyor belt mounted to pass between said feed rolls adjacent the bite and parallel to the axes of said feed rolls, said first conveyor belt cooperating with said feed rolls to form a crimping zone wherein the yarn is crimped as it is fed from said bite against the surface of said first conveyor belt, a second driven conveyor belt disposed in opposed relationship to said first conveyor belt and cooperating therewith to form a confined area along which said crimped yarn is moved, said second conveyor belt being mounted on a plurality of belt rollers, one of said belt rollers being in juxtaposition to said crimping zone, and a transfer bridge spanning the gap between said crimping zone and said second conveyor belt to facilitate smooth passage of yarn from said crimping zone to said second conveyor belt, said transfer bridge comprising a plate having an opening therethrough for the passage of yarn and a first filler element aligned with said opening and wipingly engaging said feed rollers at the bite thereof to insure that yarn cannot intrude between said rotating feed rollers and said transfer bridge.
Claim 3
Dependent Claim
30 words
Apparatus as set forth in claim 1 including a pressure element disposed against said first belt in the zone of said bite for providing the back pressure required for crimping.
Claim 4
Dependent Claim
32 words
Apparatus as set forth in claim 2 in which said element is mounted for vertical movement and yieldable means is provided for holding said element against the surface of said first belt.
Claim 5
Dependent Claim
25 words
Apparatus as set forth in claim 3 in which said element comprises a pad having a low friction surface in contact with said first belt.
Claim 6
Dependent Claim
31 words
Apparatus as set forth in claim 1 in which adjustable means is provided for mounting said first belt whereby the spacing of said first belt from said bite may be controlled.
Claim 7
Dependent Claim
32 words
Apparatus as set forth in claim 1 in which the contacting surface of said first belt is formed with spaced recesses for producing areas wherein crimps of different leg length are formed.
Claim 8
Dependent Claim
20 words
Apparatus as set forth in claim 1 wherein spaced pins are carried by the contacting surface of said first belt.
Claim 9
Dependent Claim
37 words
Apparatus as set forth in claim 1 further comprising a fixed member having a channel therethrough, said conveyor belts passing through said channel and together therewith forming a confined chamber through which said crimped yarn is moved.
Claim 10
Dependent Claim
53 words
Apparatus as set forth in claim 8 wherein said channel has an input end disposed adjacent one face of said feed rolls and a back plate is disposed adjacent the opposite face of said feed rolls at said bite to form with said feed rolls and said conveyor belt a confined crimping zone.
Claim 11
Dependent Claim
17 words
Apparatus as set forth in claim 1 in which said belts are substantially parallel to one another.
Claim 12
Dependent Claim
24 words
Apparatus as set forth in claim 1 wherein said first and second conveyor belts define a yarn setting zone downstream of said feed rollers.
Claim 13
Dependent Claim
17 words
Apparatus as set forth in claim 11 in which Said setting zone includes heating and cooling zones.
References Cited (Backward Citations)
US3058167A
Cited
US2914810A
Cited
US3166820A
Cited
US3146512A
Cited
US3153272A
Cited
US3212157A
Cited
US3284868A
Cited
US3177556A
Cited
US3287783A
Cited
US3345700A
Cited
US3378997A
Cited
US3656214A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |