US3720409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for successively taking out papers from a stack thereof
Assignee: Toshiba Corp
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Filing: 1971-04-07
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Granted: 1973-03-13
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Expires: 1991-04-07
Abstract
Abstract Sheet feeding apparatus comprises paper supply means including means for progressively advancing a stack of papers, a rotary member positioned on the output side of the paper supply means, and a suction head supported by the rotary member so as to be rotatable about its own axis and to rotate about the axis of the rotary member in response to the rotation of the rotary member. The suction head has a vacuum suction port to suck and separate the foremost sheet of paper from the stack and suction conveyor means is disposed close to the locus of revolution of the suction head to suck and convey the sheet of paper sucked and separated by the suction head away from the stack.
Inventors
- 👤 M Kubo
- 👤 S Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:56
CPC Classifications
B; B65; B65H; B65H5/00; B65H5/08; B65H5/12; B65H3/00; B65H3/08; B65H3/42; B65H2301/00; B65H2301/30; B65H2301/32; B65H2301/321; B65H2403/00; B65H2403/50; B65H2403/54; B65H2403/543
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
183 words
Sheet feeding apparatus comprising: paper sheet supply means including means for holding paper sheets in a stacked state, and means for progressively advancing said stack of paper sheets; a rotary member positioned on the output side of said paper sheet supply means; means for rotating said rotary member; a suction head supported by said rotary member so as to be rotatable about its own axis and to rotate about the axis of said rotary member in response to the rotation of said rotary member; means for rotating said suction head said suction head having a vacuum suction port to separate one end of the foremost sheet of paper from the remaining stacked sheets of paper by the application of suction through said vacuum suction port to that side of the foremost sheet of paper which faces said suction head; and suction conveyor means disposEd close to the locus of revolution of said suction head and arranged to attract the side of said foremost sheet of paper sucked and separated by said suction head, and to convey the separated sheet away from the stack.
Claim 2
Dependent Claim
183 words
Sheet feeding apparatus comprising: paper sheet supply means including means for holding paper sheets in a stacked state, and means for progressively advancing said stack of paper sheets; a rotary member positioned on the output side of said paper sheet supply means; means for rotating said rotary member; a suction head supported by said rotary member so as to be rotatable about its own axis and to rotate about the axis of said rotary member in response to the rotation of said rotary member; means for rotating said suction head said suction head having a vacuum suction port to separate one end of the foremost sheet of paper from the remaining stacked sheets of paper by the application of suction through said vacuum suction port to that side of the foremost sheet of paper which faces said suction head; and suction conveyor means disposEd close to the locus of revolution of said suction head and arranged to attract the side of said foremost sheet of paper sucked and separated by said suction head, and to convey the separated sheet away from the stack.
Claim 3
Dependent Claim
183 words
Sheet feeding apparatus comprising: paper sheet supply means including means for holding paper sheets in a stacked state, and means for progressively advancing said stack of paper sheets; a rotary member positioned on the output side of said paper sheet supply means; means for rotating said rotary member; a suction head supported by said rotary member so as to be rotatable about its own axis and to rotate about the axis of said rotary member in response to the rotation of said rotary member; means for rotating said suction head said suction head having a vacuum suction port to separate one end of the foremost sheet of paper from the remaining stacked sheets of paper by the application of suction through said vacuum suction port to that side of the foremost sheet of paper which faces said suction head; and suction conveyor means disposEd close to the locus of revolution of said suction head and arranged to attract the side of said foremost sheet of paper sucked and separated by said suction head, and to convey the separated sheet away from the stack.
Claim 4
Dependent Claim
183 words
Sheet feeding apparatus comprising: paper sheet supply means including means for holding paper sheets in a stacked state, and means for progressively advancing said stack of paper sheets; a rotary member positioned on the output side of said paper sheet supply means; means for rotating said rotary member; a suction head supported by said rotary member so as to be rotatable about its own axis and to rotate about the axis of said rotary member in response to the rotation of said rotary member; means for rotating said suction head said suction head having a vacuum suction port to separate one end of the foremost sheet of paper from the remaining stacked sheets of paper by the application of suction through said vacuum suction port to that side of the foremost sheet of paper which faces said suction head; and suction conveyor means disposEd close to the locus of revolution of said suction head and arranged to attract the side of said foremost sheet of paper sucked and separated by said suction head, and to convey the separated sheet away from the stack.
Claim 5
Dependent Claim
107 words
Apparatus according to claim 1 comprising a hollow shaft supporting said rotary member, an evacuation device connected to said hollow shaft, the suction head being mounted on the periphery of said rotary member, said suction port communicating with the interior of said hollow shaft, and valve means for controlling the communication between said suction head and said hollow shaft in response to the rotation of said rotary member, thereby applying suction to said sheet of paper before said suction port of said suction head engages said sheet of paper and removing said suction after said foremost sheet of paper has been sucked and separated from the stack.
Claim 6
Dependent Claim
52 words
Apparatus according to claim 2 wherein said suction head is provided with gear teeth and a fixed member is provided with gear teeth meshing with said gear teeth on said suction head so as to rotate said suction head about its own axis in response to the rotation of said rotary member.
Claim 7
Dependent Claim
79 words
Apparatus according to claim 1 wherein a separation head is mounted on said rotary member at a position to the rear of said suction head as viewed in the direction of rotation of said rotary member, whereby as said rotary member rotates said separation head is inserted between a sheet of paper sucked and separated by said suction head and the next sheet of paper so as to feed said separated sheet of paper to said suction conveyor means.
Claim 8
Dependent Claim
21 words
Apparatus according to claim 4 wherein said separation head includes a rotary member having a larger diameter than said separation head.
Claim 9
Dependent Claim
15 words
Apparatus according to claim 5 wherein said rotary member is made of a frictional member.
Claim 10
Dependent Claim
31 words
Apparatus according to claim 5 wherein means for controlling the rotation of said separation head during the rotation of said rotary member is provided near the periphery of said rotary member.
Claim 11
Dependent Claim
54 words
Apparatus according to claim 7 wherein said rotation control means is positioned to the rear of the position where said separation head engages the foremost sheet of said paper in said paper supply means and said rotation control means comprises a spring member arranged to resiliently engage the rotary member of said separation head.
Claim 12
Dependent Claim
53 words
Apparatus according to claim 7 wherein said rotation control means is positioned to the rear of the position where said separation head engages the foremost sheet of paper in said paper supply means and comprises by an endless belt running in a direction opposite to the direction of rotation of said rotary member.
Claim 13
Dependent Claim
26 words
Apparatus according to claim 9 wherein said belt also forms a conveyor passage cooperating with said suction conveyor means for carrying said separated sheet of paper.
Claim 14
Dependent Claim
47 words
Apparatus according to claim 5 wherein said separation head is carried by one end of a crank arm pivotally mounted on said rotary member and said crank arm is provided with a spring urging said separation head to the outside of the periphery of said rotary head.
Claim 15
Dependent Claim
31 words
Apparatus according to claim 2 wherein said valve means includes a communication passage which vents to the atmosphere said suction port of said suction head when said valve means is closed.
Claim 16
Dependent Claim
34 words
Apparatus according to claim 2 which further comprises means for detecting suction of said paper by said suction head and means controlled by said detecting means for controlling the speed of said rotary member.
Claim 17
Dependent Claim
23 words
Apparatus according to claim 13 wherein said suction detection means comprises a pressure responsive means responsive to the pressure in said suction head.
Claim 18
Dependent Claim
46 words
Apparatus according to claim 13 wherein said suction detection means comprises a source of light and a photoelectric element which are arranged such that the light from said source to said photoelectric element is interrupted by a paper sheet sucked and separated by said suction head.
Claim 19
Dependent Claim
27 words
APparatus according to claim 13 wherein said suction detection means comprises a micro-switch arranged to be operated by a paper sucked and separated by said suction head.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |