US3971520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for doffing and inserting empty cores on an automatic winder
Assignee: Murata Machinery Ltd
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Filing: 1974-08-08
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Granted: 1976-07-27
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Expires: 1994-08-08
Abstract
Abstract An apparatus is disclosed for doffing and inserting empty cores on an automatic winder having core holders each clamping and freeing cores by assuming two prescribed positions, said apparatus being comprised of a position holding mechanism for holding cradle parts of winding units, a forwarding mechanism for arranging a package in a direction adapted for taking it off, a package take-off mechanism for taking off the package from the core holder, a package receiving mechanism for receiving the package so taken off, a yarn severing and holding mechanism for severing a yarn on a path from a bobbin of the winding unit to the package and carrying the yarn end to the core holder part, a core inserting mechanism for inserting an empty core over the core holder and returning the core holder to the winding up position and a core supply mechanism for supplying empty cores to the core inserting mechanism, so that successful doffing can be achieved regardless of the size and type of yarn packages, e.g. cheese-type packages or cone-type packages.
Inventors
- 👤 Junichiro Shimai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:13
CPC Classifications
B; B65; B65H; B65H54/00; B65H54/02; B65H54/22; B65H54/24; B65H67/00; B65H67/04; B65H67/0405; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
261 words
An apparatus for doffing and inserting empty cores on automatic winder having core holders each adapted to clamp and free a core by assuming first and second prescribed positions respectively, and each mounted to urge a core mounted thereon toward a winding drum for forming full packages of yarn on the core from yarn on a bobbin, during a winding operation, said apparatus comprising, in combination, a position holding mechanism for lifting a full package from a winding drum, a forwarding mechanism for turning a core holder from a first position to a second position comprising means positionable to engage and push a side of a full package lifted by said position holding mechanism, a package take-off mechanism for taking off said full package comprising means positionable to engage and push one end of a full package on a core holder turned to its second position by said forwarding mechanism, a receiver mechanism positioned to receive a full package taken off a core holder by said take-off mechanism, a yarn severing and holding mechanism positionable to sever a yarn portion extending from a full package in said receiver mechanism to a bobbin and to hold the end of the severed yarn extending to said bobbin, and a core inserting mechanism comprising means positionable to insert an empty core over a core holder from which a full package has been taken off by said take-off mechanism and means positionable to engage and push a side of said empty core on said core holder for returning said core holder to its first position.
Claim 2
Independent Claim
261 words
An apparatus for doffing and inserting empty cores on automatic winder having core holders each adapted to clamp and free a core by assuming first and second prescribed positions respectively, and each mounted to urge a core mounted thereon toward a winding drum for forming full packages of yarn on the core from yarn on a bobbin, during a winding operation, said apparatus comprising, in combination, a position holding mechanism for lifting a full package from a winding drum, a forwarding mechanism for turning a core holder from a first position to a second position comprising means positionable to engage and push a side of a full package lifted by said position holding mechanism, a package take-off mechanism for taking off said full package comprising means positionable to engage and push one end of a full package on a core holder turned to its second position by said forwarding mechanism, a receiver mechanism positioned to receive a full package taken off a core holder by said take-off mechanism, a yarn severing and holding mechanism positionable to sever a yarn portion extending from a full package in said receiver mechanism to a bobbin and to hold the end of the severed yarn extending to said bobbin, and a core inserting mechanism comprising means positionable to insert an empty core over a core holder from which a full package has been taken off by said take-off mechanism and means positionable to engage and push a side of said empty core on said core holder for returning said core holder to its first position.
Claim 3
Dependent Claim
60 words
The apparatus of claim 1 wherein said receiver mechanism comprises chute means positioned to receive full packages taken off a core holder by said take-off mechanism, and means for releasably holding full packages in said chute means, whereby full yarn packages may be retained in said chute means during severing of a yarn by said yarn severing and holding mechanism.
Claim 4
Dependent Claim
87 words
The apparatus of claim 1 in which said first and second positions are angularly displaced positions about a vertical axis, said position holding mechanism comprising means for vertically lifting a core holder and a full package held thereby to an elevated position, and for holding the respective lifted core holder at said elevated position until an empty core has been placed thereon and said means positionable to engage and push a side of said empty core has acted to return said core holder to its first position.
Claim 5
Dependent Claim
50 words
The apparatus of claim 3 wherein said means positionable to engage and push a side of a full package lifted by said position holding mechanism comprises means positionable to engage a side of said full package to angularly displace said full package from said first position to said second position.
Claim 6
Dependent Claim
90 words
The apparatus of claim 1 wherein said core inserting mechanism comprises a supporting member, a pair of clamping members supported on said supporting member and adapted to clamp an empty core therebetween, single acting air cylinder means positioned to rotate said supporting member for thereby rotating said clamping members about a first axis between a position for receiving an empty core and a position aligned horizontally with said core holder, and releasable stopping means positioned to hold said clamping members to inhibit their return to said empty core receiving position.
Claim 7
Dependent Claim
62 words
The apparatus of claim 5 further comprising a holding assembly, said supporting member being pivotally mounted to said holding assembly for rotation about said first axis, and means for rotating said holding assembly about a second axis normal to said first axis for moving said clamping members to insert an empty core held thereby onto a core holder in said second position.
Claim 8
Dependent Claim
58 words
The apparatus of claim 5 wherein said core inserting mechanism further comprises means responsive to insertion of an empty core over a core holder at said second position for pushing said empty core from said clamping pieces, and lever means engageable with an empty core on a core holder in said first position for rotating said core holder.
Claim 9
Dependent Claim
66 words
The apparatus of claim 1 wherein said means positionable to engage and push a side of said empty core on said holder comprises a lever rotatably mounted to said means positionable to insert an empty core over said core holder, and a core pressing roller rotatably mounted on said lever and positioned to engage and push a side of said empty core on said core holder.
Claim 10
Dependent Claim
166 words
The apparatus of claim 8 further comprising a bent lever means pivotally mounted to said lever, stop means on said means positionable to insert an empty core over a core holder, and spring means mounted to urge said bent lever means into engagement with said stop means, whereby said bent lever means rotates with respect to said lever upon movement of said lever to effect engagement of said core pressing roller with an empty core on a core holder, said means positionable to insert an empty core over a core holder being movable between a position for receiving an empty core and a position for inserting an empty core received thereby on a core holder at said second position, said bent lever means having an end positioned to be engageable with a core on a core holder at said first position for effecting the rotation of said last-mentioned core holder upon return of said means positionable to insert an empty core toward said core receiving position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |