US3736964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weft storage device
Assignee: Draper Corp
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Filing: 1972-01-24
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Granted: 1973-06-05
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Expires: 1992-01-24
Abstract
Abstract A weft storage device for shuttleless looms having a stationary source of weft supply which includes an elongated air passage device defining a weft chamber through which air is directed to temporarily store a pre-measured length of weft under tension prior to its insertion into a shed of warp threads.
Inventors
- 👤 J Budzyna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:28
CPC Classifications
D; D03; D03D; D03D47/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
An improved structure for storing successively predetermined lengths of textile yarn to be inserted into the sheds formed between cooperating warp yarns, said structure comprising: a. means defining an elongated air passage having a single source of compressed air directed therein and within which a loop of yarn can be formed and stored for weft insertion into a shed; b. means on said elongated air passage defining means forming inlet and outlet ports thorugh which yarn can enter into and exit from said air passage respectively; and c. air flow dividing means disposed within said elongated air passage creating a separate air passage in the vicinity of each inlet and outlet port means which is of smaller cross-sectional area than that of said elongated air passage.
Claim 2
Dependent Claim
126 words
An improved structure for storing successively predetermined lengths of textile yarn to be inserted into the sheds formed between cooperating warp yarns, said structure comprising: a. means defining an elongated air passage having a single source of compressed air directed therein and within which a loop of yarn can be formed and stored for weft insertion into a shed; b. means on said elongated air passage defining means forming inlet and outlet ports thorugh which yarn can enter into and exit from said air passage respectively; and c. air flow dividing means disposed within said elongated air passage creating a separate air passage in the vicinity of each inlet and outlet port means which is of smaller cross-sectional area than that of said elongated air passage.
Claim 3
Dependent Claim
25 words
The improved structure according to claim 1 wherein said inlet and outlet ports are angularly disposed relative to the longitudinal extent of said air passage.
References Cited (Backward Citations)
US3395737A
Cited
CH477581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |