Patent US3820730A successfully refreshed from Google Patents.
US3820730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic doffing apparatus for textile machine having one or more winding units
Assignee: Individual
•
Filing: 1972-06-12
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Granted: 1974-06-28
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Expires: 1992-06-12
Abstract
Abstract A textile machine having a plurality of winding units arranged in a row is serviced by automatic doffing apparatus travelling on a track along the row of winding units. Each winding unit has means for sensing when a bobbin being wound in it is full. When the doffing apparatus comes to a winding unit with a full bobbin, it stops, the yarn is severed upstream of the bobbin and is sucked into a storage box and the full bobbin is released from the bobbin chuck and discharged. A new bare bobbin is thereupon delivered by the doffing apparatus to the chuck, the yarn is transferred to the new bobbin which thereupon starts to rotate and is severed by the severing means downstream of the bobbin. The doffing apparatus then proceeds to the next winding unit with a full bobbin. When stopping at a winding unit, the doffing apparatus first slows down so that shock is avoided and accurate positioning is achieved. The sequential steps of operation of the doffing apparatus are controlled by a group of coaxial programming cams actuating corresponding microswitches.
Inventors
- 👤 T Endo
- 👤 K Egami
- 👤 S Hagihara
- 👤 T Aoba
- 👤 S Morishita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:05
CPC Classifications
B; B65; B65H; B65H54/00; B65H54/70; B65H54/71; B65H67/00; B65H67/04; B65H67/0405; B65H67/06; B65H67/067; B65H75/00; B65H75/02; B65H75/18; B65H75/28; B65H75/30; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
225 words
In combination with a textile machine having at least one winding unit comprising chuck means for successively holding bobbins on which yarn is to be wound, means including a roller bail for supplying yarn to a bobbin held by said chuck means to be wound on said bobbin and means for sensing a fully packaged bobbin; automatic doffing apparatus comprising: a. means for severing said supplied yarn, b. means for releasing and discharging a fully packaged bobbin from said chuck means, c. means for pneumatically sucking a leading end of said severed yarn and storing said yarn, d. means for supplying bare bobbins, e. means for delivering a bare bobbin from said supply means to said chuck means of said winding unit, f. means for starting rOtation of said newly fed bare bobbin, g. means for transferring said yarn to the peripheral surface of said newly fed bare bobbin to be wound thereon and, h. programming means controlled by said sensing means for operating said severing means, releasing and discharging means, sucking and storing means, bobbin supply and delivery means, rotation starting means and transferring means in predetermined sequence including means for operating said severing means to sever said yarn at the start of the doffing operation and again prior to or concurrently with the winding of said yarn on said newly fed bare bobbin.
Claim 2
Dependent Claim
225 words
In combination with a textile machine having at least one winding unit comprising chuck means for successively holding bobbins on which yarn is to be wound, means including a roller bail for supplying yarn to a bobbin held by said chuck means to be wound on said bobbin and means for sensing a fully packaged bobbin; automatic doffing apparatus comprising: a. means for severing said supplied yarn, b. means for releasing and discharging a fully packaged bobbin from said chuck means, c. means for pneumatically sucking a leading end of said severed yarn and storing said yarn, d. means for supplying bare bobbins, e. means for delivering a bare bobbin from said supply means to said chuck means of said winding unit, f. means for starting rOtation of said newly fed bare bobbin, g. means for transferring said yarn to the peripheral surface of said newly fed bare bobbin to be wound thereon and, h. programming means controlled by said sensing means for operating said severing means, releasing and discharging means, sucking and storing means, bobbin supply and delivery means, rotation starting means and transferring means in predetermined sequence including means for operating said severing means to sever said yarn at the start of the doffing operation and again prior to or concurrently with the winding of said yarn on said newly fed bare bobbin.
Claim 3
Dependent Claim
64 words
Apparatus according to claim 1, in which said textile machine comprises a plurality of said winding units arranged in a row and said doffing apparatus comprises a carriage running on a track along said row and means for propelling said carriage along said track and means controlled by said sensing means for stopping said carriage at a winding unit having a fully packaged bobbin.
Claim 4
Dependent Claim
42 words
Apparatus according to claim 2, in which said propelling means comprises means for propelling said carriage normally at a first selected rate and for propelling said carriage at a lower second selected rate prior to stopping said carriage at a winding station.
Claim 5
Dependent Claim
43 words
Apparatus according to claim 2, in which said carriage comprises a horizontally movable framework on which said severing means, sucking means, bobbin supply means and bobbin delivery means are mounted, and means for moving said framework toward and away from said winding unit.
Claim 6
Dependent Claim
14 words
Apparatus according to claim 4, further comprising means for moving said sucking means vertically.
Claim 7
Dependent Claim
58 words
Apparatus according to claim 1, in which said yarn severing means comprises two scissor-like blades of which one is fixed and the other is movable, means for biasing said movable blade to open position and means controlled by said programming means to move said movable blade toward said stationary blade to sever a yarn disposed between said blades.
Claim 8
Dependent Claim
51 words
Apparatus according to claim 1, in which said bobbin supply means comprises a bobbin box for holding a plurality of empty bobbins, and said bobbin delivery means comprises slide means horizontally movable under said bobbin box to move one bobbin at a time from said bobbin box toward said winding unit.
Claim 9
Dependent Claim
41 words
Apparatus according to claim 7, in which said bobbin delivery means further comprises a swingable arm carrying bobbin holding means and means for operating said arm to take a bobbin from said slide means and deliver it to said winding unit.
Claim 10
Dependent Claim
52 words
Apparatus according to claim 1, in which said yarn transferring means comprises a nozzle and means for supplying air under pressure to said nozzle at a selected time, said nozzle being positioned to direct a stream of air to deflect said yarn to the surface of a bobbin in said winding unit.
Claim 11
Dependent Claim
43 words
Apparatus according to claim 1, in which said yarn transferring means comprises a movable arm carrying a yarn-engaging finger, and means for moving said arm to transfer a yarn engaged by said finger to the surface of a bobbin in said winding unit.
Claim 12
Dependent Claim
36 words
In apparatus according to claim 1, a bobbin having a portion of its peripheral surface covered with hook fabric for holding a yarn brought into engagement with the periphery of said bobbin by said transferring means.
Claim 13
Dependent Claim
30 words
In apparatus according to claim 1, a bobbin having a notch at one end to catch and hold a yarn brought into engagement with said bobbin by said transferring means.
Claim 14
Dependent Claim
54 words
Apparatus according to claim 1, in which said programming means comprises a plurality of coaxial programming cams, means for rotating said cams together at a selected speed and switch means actuable respectively by said cams and controlling the sequential operation of said severing means, sucking and storing means, bobbin delivery means and transferring means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |