US3908980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Work loading, unloading, and positioning means for handling sheet material in power presses and the like
Assignee: Individual
•
Filing: 1973-08-02
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Granted: 1975-09-30
•
Expires: 1993-08-02
Abstract
Abstract Work loading, unloading, and positioning means for handling sheet material for power presses and the like is provided with reversible power driven rollers for both loading and unloading of sheets. In the case of sheets constructed of ferromagnetic material, magnetized drive rollers are used to move the sheets against forward positioning or locating stops that extend above and below the pass line to arrest movement of the sheets. In one embodiment of this invention, each sheet is moved against a positioning or locating side stop extending upward from the press bed, by power means that bodily moves the drive rollers sideways. In other embodiments of this invention, a sideways pusher, in the form of a spring or a power operated device, moves the sheet sideways against the side stop. To improve side pusher operation, the magnetic field of the drive rollers is pulsed, and in the case of the power operated side pusher, energization thereof is alternated with energization of the drive roll magnetic system. In still another embodiment of this invention, two sets of axially aligned drive rollers have their magnetic fields alternately energized to prevent the sheets from coming to rest in a skewed position. After the press is operated, rotation of the drive rolls is reversed to retrieve the sheet and deliver it to a stacking means.
Inventors
- 👤 Alexander Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:12
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/26; B21D43/02; B21D43/04; B21D43/08; B21D43/18; Y; Y10; Y10S; Y10S271/00; Y10S271/901; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2198; Y10T83/647; Y10T83/6572; Y10T83/6574
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
183 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning said stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means includes electromagnetic sheet holding means divided into first and second portions spaced along the rotational axis of said roller means and positioned on opposite sides of a center line for said feed path, and means for energizing each of said portions while the other is deenergized.
Claim 2
Dependent Claim
183 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning said stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means includes electromagnetic sheet holding means divided into first and second portions spaced along the rotational axis of said roller means and positioned on opposite sides of a center line for said feed path, and means for energizing each of said portions while the other is deenergized.
Claim 3
Dependent Claim
280 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; means at said feeding station defining a support for a sheet having its leading edge portion engaged by said roll means; a receiving means to the rear of said roll means operatively positioned to receive sheets retrieved from the work station by said roll means; and means active upon reverse rotation of said roll means to direct sheets from said roll means to said receiving means; said receiving means being positioned below the support; said means active upon reverse rotation of said roll means including said support and means for tilting said support by raising its front edge above its rear edge and above said feed path.
Claim 4
Dependent Claim
280 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; means at said feeding station defining a support for a sheet having its leading edge portion engaged by said roll means; a receiving means to the rear of said roll means operatively positioned to receive sheets retrieved from the work station by said roll means; and means active upon reverse rotation of said roll means to direct sheets from said roll means to said receiving means; said receiving means being positioned below the support; said means active upon reverse rotation of said roll means including said support and means for tilting said support by raising its front edge above its rear edge and above said feed path.
Claim 5
Dependent Claim
188 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said means for moving a sheet sideways including spring means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means, said roll means including pulse operated electromagnetic sheet holding means.
Claim 6
Dependent Claim
188 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said means for moving a sheet sideways including spring means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means, said roll means including pulse operated electromagnetic sheet holding means.
Claim 7
Dependent Claim
199 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said means for moving a sheet sideways including a power operated pusher means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means, said roll means including electromagnetic sheet holding means, said holding means and said pusher means being alternately energized.
Claim 8
Dependent Claim
199 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said means for moving a sheet sideways including a power operated pusher means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means, said roll means including electromagnetic sheet holding means, said holding means and said pusher means being alternately energized.
Claim 9
Dependent Claim
288 words
Feeding and positioning apparatus for moving sheets along a feed path to a worK station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station, means at said feeding station defining a support for a sheet having its leading edge portion engaged by said roll means; a receiving means to the rear of said roll means operatively positioned to receive sheets retrieved from the work station by said roll means; and means active upon reverse rotation of said roll means to direct sheets from said roll means to said receiving means; said receiving means being positioned below the support; said means active upon reverse rotation of said roll means including said support and means for tilting said support by raising its front edge above its rear edge and above said feed path.
Claim 10
Dependent Claim
288 words
Feeding and positioning apparatus for moving sheets along a feed path to a worK station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station, means at said feeding station defining a support for a sheet having its leading edge portion engaged by said roll means; a receiving means to the rear of said roll means operatively positioned to receive sheets retrieved from the work station by said roll means; and means active upon reverse rotation of said roll means to direct sheets from said roll means to said receiving means; said receiving means being positioned below the support; said means active upon reverse rotation of said roll means including said support and means for tilting said support by raising its front edge above its rear edge and above said feed path.
Claim 11
Dependent Claim
234 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; said means for moving a sheet sideways including spring means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means; said sheet holding means being electromagnetic and pulse operated.
Claim 12
Dependent Claim
234 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; said means for moving a sheet sideways including spring means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means; said sheet holding means being electromagnetic and pulse operated.
Claim 13
Dependent Claim
243 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; said means for moving a sheet sIdeways including a power operated pusher means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means; said holding means being electromagnetic, said holding means and said pusher means being alternately energized.
Claim 14
Dependent Claim
243 words
Feeding and positioning apparatus for moving sheets along a feed path to a work station of a power operated machine from a supply station located to the rear thereof; said apparatus including positioning front stop means at said work station and disposed transverse to said feed path, positioning side stop means at said work station at one side of said feed path, power operated roll means disposed to the rear of said work station positioned to engage a sheet at said supply station and upon forward rotation of said roll means drive this sheet forward until movement thereof is arrested by engagement of its leading edge with said front stop means, means for moving a sheet sideways to move a side edge of a sheet at said work station against said side stop means, said roll means including magnetic sheet holding means, said roll means being positioned to engage a trailing edge portion of a sheet engaged with said front stop means; and means for reversing rotation of said roll means whereby the latter retrieves the sheet from said work station; said means for moving a sheet sIdeways including a power operated pusher means along the other side of the feed path and engageable with a side edge of a sheet at said work station urging the other side edge of said sheet against said side stop means; said holding means being electromagnetic, said holding means and said pusher means being alternately energized.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |