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US3903770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear feeding system to front gauges using magnetic delivery means and a vertically yielding support table
Assignee: Individual
•
Filing: 1973-11-15
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Granted: 1975-09-09
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Expires: 1993-11-15
Abstract
Abstract A feed system for moving sheet material along a feed path from behind a squaring shear between the shear knives to gauging stops in front of a shear using reversible magnetic conveyors for delivery and a vertically yielding table to avoid interfering with the ram of the shear during the cutting cycle. A preferred embodiment uses dual tracks of reversible magnetic conveyors which can be alternately actuated to place sheet material positively against front stops. The preferred embodiment is also programmable to allow sequenced feeding to accommodate squaring, re-squaring and secondary cutting operations to a front gauge or a back gauge.
Inventors
- 👤 Alexander Fowler
- 👤 Joseph M Fowler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:31
CPC Classifications
B; B23; B23D; B23D15/00; B23D15/06; B23D15/08; B21; B21D; B21D43/00; B21D43/02; B21D43/18; Y; Y10; Y10T; Y10T83/00; Y10T83/162; Y10T83/173; Y10T83/175; Y10T83/178; Y10T83/202; Y10T83/2092; Y10T83/2198; Y10T83/444; Y10T83/461; Y10T83/4612; Y10T83/647; Y10T83/6572; Y10T83/6574; Y10T83/664; Y10T83/748
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
200 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, in which the mass of said vertically yieldable apparatus is counterbalanced around a pivoted support located behind the stationary lower knife, said apparatus including power operated driving means conjoined with magnetic sheet holding means to move a sheet along said feed path away from said positioning means, electrical control means for determining limits of sheet movement away from said positioning means, and means for reversing said driving means automatically after completion of a preset number of shearing cycles to return a sheet along said path to said positioning means.
Claim 2
Dependent Claim
200 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, in which the mass of said vertically yieldable apparatus is counterbalanced around a pivoted support located behind the stationary lower knife, said apparatus including power operated driving means conjoined with magnetic sheet holding means to move a sheet along said feed path away from said positioning means, electrical control means for determining limits of sheet movement away from said positioning means, and means for reversing said driving means automatically after completion of a preset number of shearing cycles to return a sheet along said path to said positioning means.
Claim 3
Dependent Claim
25 words
In a fabricating system as set forth in claim 1 in which the driving means conjoined with magnetic sheet holding means comprises electromagnetic roll means.
Claim 4
Dependent Claim
47 words
In a fabricating system as set forth in claim 1 in which the transfer means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 5
Dependent Claim
24 words
In a fabricating system as set forth in claim 3 in which the transfer means comprises driving means conjoined with magnetic sheet holding means.
Claim 6
Dependent Claim
25 words
In a fabricating system as set forth in claim 4 in which the driving means conjoined with magnetic sheet holding means comprises electromagnetic roll means.
Claim 7
Dependent Claim
188 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has a positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated transfer means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said transfer means to return sheets along said feed path to said positioning means, in which said transfer means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 8
Dependent Claim
188 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has a positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated transfer means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said transfer means to return sheets along said feed path to said positioning means, in which said transfer means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 9
Dependent Claim
198 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationarY lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated driving means conjoined with magnetic sheet holding means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said driving means to return sheets along said feed path to said positioning means, in which said driving means conjoined with sheet holding means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 10
Dependent Claim
198 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationarY lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated driving means conjoined with magnetic sheet holding means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said driving means to return sheets along said feed path to said positioning means, in which said driving means conjoined with sheet holding means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 11
Dependent Claim
190 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated electromagnetic roll means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said electromagnetic roll means to return sheets along said feed path to said positioning means, in which said electromagnetic roll means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
Claim 12
Dependent Claim
190 words
In a fabricating system in which a squaring shear has a stationary bed carrying a stationary lower knife and has a vertically reciprocative ram carrying an upper knife, and has positioning stop means for sheets located close to a work station at the front thereof, said positioning means disposed transverse to a feed path for sheets, and in which the squaring shear acts to sever positioned sheets disposed along said feed path, the combination with said squaring shear, of feeding apparatus for sheets located immediately behind and adjacent to the stationary lower knife, said apparatus being vertically yieldable when the shear ram descends in order to avoid interference with ram operation, said apparatus including power operated electromagnetic roll means to move sheets along said feed path away from said positioning means and electrically controlled mechanisms for reversing said electromagnetic roll means to return sheets along said feed path to said positioning means, in which said electromagnetic roll means is divided into separate sections located on opposite sides of a center line of said feed path, and means for actuating each of said sections when the other sections are not actuated.
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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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |