US3778996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for doffing a bobbin and forming a transfer tail
Assignee: REED-CHATWOOD Inc
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Filing: 1972-04-13
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Granted: 1973-12-18
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Expires: 1992-04-13
Abstract
Abstract A method for simultaneously removing a filled bobbin and its trailing bobbin thread from a spindle in a single operation, winding a new transfer tail on the spindle, and then severing the thread between the spindle and bobbin.
Inventors
- 👤 R Olson
- 👤 H Yone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:10
CPC Classifications
D; D01; D01H; D01H9/00; D01H9/02; D01H9/08; D01H9/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
111 words
A method for automatically forming on a spindle a new transfer tail from a filament wound on a bobbin mounted upon said spindle without accumulating an old transfer tail on said spindle, comprising the steps of doffing from said spindle the bobbin having said filament wound thereon, maintaining said filament on the bobbin until the same is substantially clear of the spindle to prevent transfer of said filament from the bobbin to said spindle during said doffing, wrapping a turn of said filament around the spindle to form said new transfer tail, and severing said filament between the spindle and said bobbin to leave said new transfer tail on the spindle.
Claim 2
Independent Claim
111 words
A method for automatically forming on a spindle a new transfer tail from a filament wound on a bobbin mounted upon said spindle without accumulating an old transfer tail on said spindle, comprising the steps of doffing from said spindle the bobbin having said filament wound thereon, maintaining said filament on the bobbin until the same is substantially clear of the spindle to prevent transfer of said filament from the bobbin to said spindle during said doffing, wrapping a turn of said filament around the spindle to form said new transfer tail, and severing said filament between the spindle and said bobbin to leave said new transfer tail on the spindle.
Claim 3
Dependent Claim
42 words
A method according to claim 1 further comprising an initial step of providing slack in the filament trailing from said bobbin to prevent breakage of the filament as said bobbin is doffed and the new transfer tail is wound on the spindle.
Claim 4
Dependent Claim
45 words
A method according to claim 1 wherein said maintaining comprises contacting both the bobbin and the filament trailing from said bobbin, inhibiting unwinding of the filament from said bobbin, and maintaining said contact while accelerating said bobbin and the filament simultaneously off of the spindle.
Claim 5
Dependent Claim
25 words
A method according to claim 1 wherein said doffing comprises prying the bobbin loose from said spindle and accelerating the bobbin off of said spindle.
Claim 6
Dependent Claim
29 words
A method according to claim 1 wherein said wrapping comprises catching a portion of the filament trailing from the doffed bobbin and moving said trailing portion around the spindle.
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |