Patent US3879925A successfully refreshed from Google Patents.
US3879925A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary doffer in automatic doffing apparatus
Assignee: Toyota Industries Corp
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Filing: 1973-12-05
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Granted: 1975-04-29
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Expires: 1993-12-05
Abstract
Abstract An automatic doffing apparatus adapted for use with spinning machinery having a plurality of spinning units arranged in sideby-side relation, for doffing full packages one by one from the respective spinning units during operation of the spinning machinery while travelling along the front of the spinning machinery. The doffing apparatus includes a rotary doffer, which comprises a cam for releasing a bobbin holder of each spinning unit holding the full package, a first package receiving and transporting plate for demounting the package from the bobbin holder and receiving the demounted package, and a second package receiving and transporting plate for receiving the demounted package from the first package receiving and transporting plate and transporting it to a predetermined position, from which the full packages are transferred to a package container. Both the plates are associated with respective cams so that they perform their abovedescribed functions sequentially according to a predetermined program.
Inventors
- 👤 Toshio Yoshizawa
- 👤 Yasuo Yamada
- 👤 Toshinori Taniguchi
- 👤 Tatsuo Kose
- 👤 Kazuo Ohchi
- 👤 Kiyokazu Hori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:48
CPC Classifications
B; B65; B65H; B65H67/00; B65H67/04; B65H67/0405; B65H67/0411; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
323 words
In an automatic doffing apparatus, a rotary doffer adapted for use with a spinning machine having a plurality of spinning units arranged in side-by-side relation, for performing a doffing operation of demounting full packages one by one from the respective spinning units and applying empty bobbins to the spinning units, from which the full packages have been demounted, while travelling along the front of the spinning machine during operation of the same: said rotary doffer comprising: a rotary shaft; a support fixedly secured to said rotary shaft; a pair of first and second package receiving and transporting members pitovally mounted on said support; a pair of first and second cam means operatively associated with said first and second members respectively and having cam surfaces for giving to said first and second members different rotational and pivotal combination motions so that a portion of the doffing operation, which portion comprises at least demounting and receiving each full package from the respective spinning unit and transporting it to a predetermined position from which each full package is brought out of a path of said rotary doffer, is shared by said first and second members, said cam surfaces having shapes advancing said first member to come into contact with the full package earlier than said second member, for pushing up each full package by the free end of said first member, for locating said first member in a package receiving position below the package while moving the free end of said first member substantially horizontally, for advancing said second member so as to be ready to contact the package when said first member reaches substantially the package receiving position, for further advancing said first and second members so as to transfer the package from said first member to said second member, and for rapidly advancing said second member to the predetermined position from which the package is brought out of the path of said rotary doffer.
Claim 2
Dependent Claim
323 words
In an automatic doffing apparatus, a rotary doffer adapted for use with a spinning machine having a plurality of spinning units arranged in side-by-side relation, for performing a doffing operation of demounting full packages one by one from the respective spinning units and applying empty bobbins to the spinning units, from which the full packages have been demounted, while travelling along the front of the spinning machine during operation of the same: said rotary doffer comprising: a rotary shaft; a support fixedly secured to said rotary shaft; a pair of first and second package receiving and transporting members pitovally mounted on said support; a pair of first and second cam means operatively associated with said first and second members respectively and having cam surfaces for giving to said first and second members different rotational and pivotal combination motions so that a portion of the doffing operation, which portion comprises at least demounting and receiving each full package from the respective spinning unit and transporting it to a predetermined position from which each full package is brought out of a path of said rotary doffer, is shared by said first and second members, said cam surfaces having shapes advancing said first member to come into contact with the full package earlier than said second member, for pushing up each full package by the free end of said first member, for locating said first member in a package receiving position below the package while moving the free end of said first member substantially horizontally, for advancing said second member so as to be ready to contact the package when said first member reaches substantially the package receiving position, for further advancing said first and second members so as to transfer the package from said first member to said second member, and for rapidly advancing said second member to the predetermined position from which the package is brought out of the path of said rotary doffer.
Claim 3
Dependent Claim
53 words
The rotary doffer as set forth in claim 1, wherein said first and second members have multi-forked end portions so that the end portions of the second member can pass between the end portions of the first member, whereby the doffing operation is pErformed without any interferences between said first and second members.
Claim 4
Dependent Claim
38 words
The rotary doffer as set forth in claim 1, wherein said first member has a roller at the free end thereof to prevent the package from being injured by the free end when it pushes up the package.
Claim 5
Dependent Claim
34 words
The rotary doffer as set forth in claim 1, wherein the free end of said second member is rounded to facilitate the transfer of the package from said first member to said second member.
Claim 6
Dependent Claim
68 words
The rotary doffer as set forth in claim 1, wherein each of said first and second cam means comprises a cam plate loosely mounted on said rotary shaft and fixedly secured to a portion of the doffing apparatus, and a cam follower mounted on a lever fixedly connected with the associated package receiving and transporting member so as to roll on the cam surface of said cam plate.
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) | 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 |