Patent US2692045A successfully refreshed from Google Patents.
Patent US3870294A successfully refreshed from Google Patents.
US3870294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the extraction of sheets
Assignee: Kleindienst GmbH and Co KG
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Filing: 1973-01-17
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Granted: 1975-03-11
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Expires: 1993-01-17
Abstract
Abstract Apparatus for the withdrawal of sheets from a stack comprises a unit to receive a major stack of the sheets, a collecting unit in which a minor stack of constant height is formed of sheets withdrawn from the major stack, and means effective to separate and feed forwardly the lowermost sheet in the minor stack.
Inventors
- 👤 Sigmar Donner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:07
CPC Classifications
B; B65; B65H; B65H83/00; B65H83/02; B07; B07C; B07C1/00; B07C1/02; B07C1/025; B65G; B65G59/00; B65G59/06; B65G59/067; B65G59/068; B65H3/00; B65H3/02; B65H3/06; B65H3/063; B65H3/46; B65H3/60; B65H3/62; G; G06; G06K; G06K13/00; G06K13/02; G06K13/08; G06K13/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
An apparatus for feeding sheets to a processing unit, comprising: a magazine adapted to receive a main stack of sheets of variable height and having a support surface at the bottom of the magazine and an outlet at said surface for passing sheets from the bottom of said main stack in one direction; first feed means for advancing sheets from the bottom of said main stack through said outlet in said direction; a further surface disposed below the first-mentioned surface and ahead of said outlet in said direction for receiving a minor stack of sheets, said first surface being inclined at an acute angle to said further surface; an abutment extending generally transversely to said further surface remote from said outlet for intercepting leading edges of sheets fed through said outlet and depositing same upon said further surface in said minor stack with the sheets thereof aligned along said edges; second feed means for drawing the lowermost sheet from said minor stack and advancing same beneath said magazine in the opposite direction with the aforementioned edges of the sheets withdrawn from said minor stack trailing in said opposite direction; and stack-height-detection means on said abutment and responsive to the height of the minor stack on said further surface for controlling said first means to maintain at least the maximum height of said minor stack constant.
Claim 2
Independent Claim
225 words
An apparatus for feeding sheets to a processing unit, comprising: a magazine adapted to receive a main stack of sheets of variable height and having a support surface at the bottom of the magazine and an outlet at said surface for passing sheets from the bottom of said main stack in one direction; first feed means for advancing sheets from the bottom of said main stack through said outlet in said direction; a further surface disposed below the first-mentioned surface and ahead of said outlet in said direction for receiving a minor stack of sheets, said first surface being inclined at an acute angle to said further surface; an abutment extending generally transversely to said further surface remote from said outlet for intercepting leading edges of sheets fed through said outlet and depositing same upon said further surface in said minor stack with the sheets thereof aligned along said edges; second feed means for drawing the lowermost sheet from said minor stack and advancing same beneath said magazine in the opposite direction with the aforementioned edges of the sheets withdrawn from said minor stack trailing in said opposite direction; and stack-height-detection means on said abutment and responsive to the height of the minor stack on said further surface for controlling said first means to maintain at least the maximum height of said minor stack constant.
Claim 3
Independent Claim
225 words
An apparatus for feeding sheets to a processing unit, comprising: a magazine adapted to receive a main stack of sheets of variable height and having a support surface at the bottom of the magazine and an outlet at said surface for passing sheets from the bottom of said main stack in one direction; first feed means for advancing sheets from the bottom of said main stack through said outlet in said direction; a further surface disposed below the first-mentioned surface and ahead of said outlet in said direction for receiving a minor stack of sheets, said first surface being inclined at an acute angle to said further surface; an abutment extending generally transversely to said further surface remote from said outlet for intercepting leading edges of sheets fed through said outlet and depositing same upon said further surface in said minor stack with the sheets thereof aligned along said edges; second feed means for drawing the lowermost sheet from said minor stack and advancing same beneath said magazine in the opposite direction with the aforementioned edges of the sheets withdrawn from said minor stack trailing in said opposite direction; and stack-height-detection means on said abutment and responsive to the height of the minor stack on said further surface for controlling said first means to maintain at least the maximum height of said minor stack constant.
Claim 4
Independent Claim
225 words
An apparatus for feeding sheets to a processing unit, comprising: a magazine adapted to receive a main stack of sheets of variable height and having a support surface at the bottom of the magazine and an outlet at said surface for passing sheets from the bottom of said main stack in one direction; first feed means for advancing sheets from the bottom of said main stack through said outlet in said direction; a further surface disposed below the first-mentioned surface and ahead of said outlet in said direction for receiving a minor stack of sheets, said first surface being inclined at an acute angle to said further surface; an abutment extending generally transversely to said further surface remote from said outlet for intercepting leading edges of sheets fed through said outlet and depositing same upon said further surface in said minor stack with the sheets thereof aligned along said edges; second feed means for drawing the lowermost sheet from said minor stack and advancing same beneath said magazine in the opposite direction with the aforementioned edges of the sheets withdrawn from said minor stack trailing in said opposite direction; and stack-height-detection means on said abutment and responsive to the height of the minor stack on said further surface for controlling said first means to maintain at least the maximum height of said minor stack constant.
Claim 5
Dependent Claim
41 words
The apparatus defined in claim 1, further comprising means for supporting said magazine for pivotal movement about a horizontal axis to adjust said angle; and means selectively locking said magazine in one of its angular positions relative to said further surface.
Claim 6
Dependent Claim
36 words
The apparatus defined in claim 2 wherein said first feed means includes a plurality of rollers spaced apart along said first surface, said magazine being pivotal about the axis of the roller proximal to said outlet.
Claim 7
Dependent Claim
28 words
The apparatus defined in claim 1 wherein said stack-height-detection means includes a switch operable to deactivate said first feed means upon said minor stack attaining said maximum height.
Claim 8
Dependent Claim
35 words
The apparatus defined in claim 1 wherein said outlet is formed by a plate having a beveled bottom edge and at least one lamellae adjustable in a vertical direction and partly overhanging said beveled edge.
Claim 9
Dependent Claim
43 words
The apparatus defined in claim 1, further comprising an upright plate spaced from said abutment along said further surface and formed with a beveled edge inclined downwardly in said opposite direction, and at least one vertically adjustable lamellae partly overhanging said beveled edge.
Claim 10
Dependent Claim
53 words
The apparatus defined in claim 1 wherein said second feed means includes at least two elements engageable with a sheet on said further surface for advancing same in said opposite direction, and at least one Retarding device engageable with a sheet entrained in said opposite direction and acting thereon in said one direction.
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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) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |