Patent US3815762A successfully refreshed from Google Patents.
US3815762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sheet feeder
Assignee: GREENE LINE Manufacturing CORP
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Filing: 1973-03-26
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Granted: 1974-06-11
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Expires: 1993-03-26
Abstract
Abstract An apparatus for feeding sheets from a stack onto a conveyor. The stack is supported by a vertically movable platform which is positioned beneath horizontally movable pushing means. The means pushes sheets from atop the stack onto an adjacent conveyor which is telescopically constructed. The conveyor is pivotally mounted to allow positioning of the conveyor distal end allowing the conveyor to be swung upwardly during non-use. The means includes a pushing arm slidably mounted in the vertical direction which has a horizontal portion resting atop the stack and a vertical portion positioned adjacent the stack. An indicator signals the vertically movable platform when the top sheet on the stack is at a predetermined height.
Inventors
- 👤 J Greene
- 👤 K Hoke
- 👤 G Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:29
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/24; B65H3/242; B65G; B65G59/00; B65H1/00; B65H1/08; B65H5/00; B65H5/02; B65H5/021
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
187 words
An apparatus for feeding sheets from a stack comprising: supporting means for initially receiving and supporting said stack and being operable to move said stack upwardly as sheets are removed from atop said stack; conveying means mounted adjacent said supporting means and operable to receive and convey away sheets from atop said stack as said sheets are pushed from said stack to said conveying means; and, pushing means mounted over said supporting means and having an outwardly extending portion and a downward extension connected together, said pushing means having said portion and extension slidably mounted thereto in an upward direction with said portion normally located by gravity in a bottom position, said supporting means being operable to lift said stack upwardly against said outwardly extending portion lifting said portion above said bottom position and contacting said stack against said portion, said pushing means being operable to position said extension vertically against said stack to push sheets therefrom to said conveying means, said extension extending a constant distance downward from said portion allowing the same number of sheets to be pushed off of said stack on each push.
Claim 2
Independent Claim
187 words
An apparatus for feeding sheets from a stack comprising: supporting means for initially receiving and supporting said stack and being operable to move said stack upwardly as sheets are removed from atop said stack; conveying means mounted adjacent said supporting means and operable to receive and convey away sheets from atop said stack as said sheets are pushed from said stack to said conveying means; and, pushing means mounted over said supporting means and having an outwardly extending portion and a downward extension connected together, said pushing means having said portion and extension slidably mounted thereto in an upward direction with said portion normally located by gravity in a bottom position, said supporting means being operable to lift said stack upwardly against said outwardly extending portion lifting said portion above said bottom position and contacting said stack against said portion, said pushing means being operable to position said extension vertically against said stack to push sheets therefrom to said conveying means, said extension extending a constant distance downward from said portion allowing the same number of sheets to be pushed off of said stack on each push.
Claim 3
Dependent Claim
68 words
The apparatus of claim 1 wherein: said pushing means includes a frame extending toward said conveying means and a carrier slidably mounted on said frame, said pushing means includes a cylinder motor with an extendable and retractable piston rod connected to said carrier to move said carrier on said frame to and from said conveying means, said portion and said extension are slidably mounted vertically to said carrier.
Claim 4
Dependent Claim
25 words
The apparatus of claim 2 wherein: said pushing means includes a beaM extending toward said conveying means with said frame slidably mounted on said beam.
Claim 5
Dependent Claim
25 words
The apparatus of claim 2 wherein: said outwardly extending portion is fixed with respect to said downward extension with said portion extending upwardly from horizontal.
Claim 6
Dependent Claim
138 words
The apparatus of claim 1 and further comprising: said conveying means includes a conveyor frame and a first conveyor with a proximal end portion pivotally mounted to said conveyor frame and with an outer end, said conveying means further includes a second conveyor with an end mounted to said outer end, said conveying means includes a cylinder motor connected between said conveyor frame and said first conveyor to pivot said first conveyor and said second conveyor upwardly and downwardly; a vertical stop wall mounted across said first conveyor limiting movement of sheets on said conveying means received from said stack and providing an accumulation of sheets against said stop wall, said stop wall being spaced above said first conveyor a fixed distance allowing only a limited number of sheets from said accumulation to pass therebeneath at a time.
Claim 7
Dependent Claim
49 words
The apparatus of claim 1 wherein: said supporting means includes a platform with a plurality of positively driven rollers rotatably mounted thereon to support said stack, said supporting means further includes a continuous belt extending around said rollers elevating said stack above said rollers and providing a gap therebetween.
Claim 8
Dependent Claim
73 words
The apparatus of claim 1 wherein: said supporting means includes a supporting frame and a platform mounted thereon, said supporting means includes a first cylinder motor connected to said platform controlling vertical movement thereof and a second cylinder motor connected to said platform controlling horizontal movement thereof transverse to the direction of movement of said sheets passing from said supporting means to said conveying means, said platform includes a plurality of drivable rollers.
Claim 9
Dependent Claim
50 words
The apparatus of claim 1 and further comprising: a pair of side guides pivotally mounted to said conveying means; and, means mounted on said conveying means and connected to said guides being operable to pivot said guides into contact with said sheets on said conveying means to straighten said sheets.
Claim 10
Independent Claim
356 words
An apparatus for feeding sheets from a stack comprising: supporting means for initially receiving and supporting said stack and being operable to move said stack upwardly as sheets are removed from atop said stack; conveying means mounted adjacent said supporting means and operable to receive and convey away sheets from atop said stack as said sheets are pushed from said stack to said conveying means; and, pushing means mounted over said supporting means and having an outwardly extending portion and a downward extension connected together, said pushing means having said portion and extension slidably mounted thereto in an upward direction with said portion normally located by gravity in a bottom position, said supporting means being operable to lift said stack upwardly against said outwardly extending portion lifting said portion above said bottom position and contacting said stack against said portion, said pushing means being operable to position said extension vertically against said stack to push sheets therefrom to said conveying means, said extension extending a constant distance downward from said portion allowing the same number of sheets to be pushed off of said stack on each push; said conveying means includes a conveyor frame and a first conveyor with a proximal end portion pivotally mounted to said conveyor frame and with an outer end, said conveying means further includes a second conveyor with an end mounted to said outer end, said conveying means includes a cylinder motor connected between said conveyor frame and said first conveyor to pivot said first conveyor and said second conveyor upwardly and downwardly; a plurality of feed rollers rotatably mounted to sAid first conveyor and positioned to force said sheet onto said first conveyor as said pushing means pushes said sheets off said stack; said supporting means includes a supporting frame and a platform mounted thereon, said supporting means includes a first cylinder motor connected to said platform controlling vertical movement thereof and a second cylinder motor connected to said platform controlling horizontal movement thereof transverse to the direction of movement of said sheets passing from said supporting means to said conveying means, said platform includes a plurality of drivable rollers.
Claim 11
Independent Claim
356 words
An apparatus for feeding sheets from a stack comprising: supporting means for initially receiving and supporting said stack and being operable to move said stack upwardly as sheets are removed from atop said stack; conveying means mounted adjacent said supporting means and operable to receive and convey away sheets from atop said stack as said sheets are pushed from said stack to said conveying means; and, pushing means mounted over said supporting means and having an outwardly extending portion and a downward extension connected together, said pushing means having said portion and extension slidably mounted thereto in an upward direction with said portion normally located by gravity in a bottom position, said supporting means being operable to lift said stack upwardly against said outwardly extending portion lifting said portion above said bottom position and contacting said stack against said portion, said pushing means being operable to position said extension vertically against said stack to push sheets therefrom to said conveying means, said extension extending a constant distance downward from said portion allowing the same number of sheets to be pushed off of said stack on each push; said conveying means includes a conveyor frame and a first conveyor with a proximal end portion pivotally mounted to said conveyor frame and with an outer end, said conveying means further includes a second conveyor with an end mounted to said outer end, said conveying means includes a cylinder motor connected between said conveyor frame and said first conveyor to pivot said first conveyor and said second conveyor upwardly and downwardly; a plurality of feed rollers rotatably mounted to sAid first conveyor and positioned to force said sheet onto said first conveyor as said pushing means pushes said sheets off said stack; said supporting means includes a supporting frame and a platform mounted thereon, said supporting means includes a first cylinder motor connected to said platform controlling vertical movement thereof and a second cylinder motor connected to said platform controlling horizontal movement thereof transverse to the direction of movement of said sheets passing from said supporting means to said conveying means, said platform includes a plurality of drivable rollers.
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |