Patent US3880101A successfully refreshed from Google Patents.
US3880101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Looper apparatus for tufting uniform cut pile
Assignee: Individual
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Filing: 1974-04-22
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Granted: 1975-04-29
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Expires: 1994-04-22
Abstract
Abstract A tufting looper mechanism including a looper element or hook and a knife member disposed against one face of the bill of the looper element only and means for reciprocably moving the looper element and knife member relative to each other at an angle for cutting a yarn loop held by the looper element to form cut pile yarn ends of equal length.
Inventors
- 👤 William Erby Passons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
D; D05; D05C; D05C15/00; D05C15/04; D05C15/08; D05C15/16; D05C15/24
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
In a tufting machine having means for stitching a yarn through a base fabric to form loops, a looper mechanism comprising: a. a looper element for receiving and holding each yarn loop, b. said looper element having an elongated bill with opposite faces and a lower cutting edge, c. a knife member having a knife edge having a length less than the length of said cutting edge, and d. means mounting said knife member for reciprocal movement relative to said looper element so that said knife edge continuously, and only, engages one face of said bill, and said knife edge cooperates only with said cutting edge to cut said yarn loop to form cut pile strand of substantially equal length.
Claim 2
Dependent Claim
120 words
In a tufting machine having means for stitching a yarn through a base fabric to form loops, a looper mechanism comprising: a. a looper element for receiving and holding each yarn loop, b. said looper element having an elongated bill with opposite faces and a lower cutting edge, c. a knife member having a knife edge having a length less than the length of said cutting edge, and d. means mounting said knife member for reciprocal movement relative to said looper element so that said knife edge continuously, and only, engages one face of said bill, and said knife edge cooperates only with said cutting edge to cut said yarn loop to form cut pile strand of substantially equal length.
Claim 3
Dependent Claim
29 words
The invention according to claim 1 to which said one face has a lower plane angular surface converging downwarD toward said opposite face and terminating in said cutting edge.
Claim 4
Dependent Claim
32 words
The invention according to claim 2 in which said opposite faces of said looper element are plane and parallel, said cutting edge lying substantially equidistant between the planes of said opposite faces.
Claim 5
Dependent Claim
25 words
The invention according to claim 3 in which said angular surface forms a dihedral angle of approximately 20* with the planes of said opposite faces.
Claim 6
Dependent Claim
34 words
The invention according to claim 4 in which said knife edge is disposed at an angle to said cutting edge having a lateral component of approximately 8* to the plane of said one face.
Claim 7
Dependent Claim
30 words
The invention according to claim 1 in which said knife edge is disposed at an angle to said cutting edge to provide a reciprocable scissors action for cutting said yarn.
References Cited (Backward Citations)
US3730115A
Cited
US3735715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |