Patent FR522680A successfully refreshed from Google Patents.
Patent US4880350A successfully refreshed from Google Patents.
US4880350A
Expired / Lapsed
US
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Method and apparatus for handling stacks of sheets
Assignee: Baldwin Technology Corp
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Filing: 1988-09-06
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Granted: 1989-11-14
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Expires: 2008-09-06
Abstract
Abstract Method and apparatus for handling stacks of sheets, including a carrier for lowering the sheets in a stacker and having a clamp which applies to the bundle and moves therewith throughout the lowering process. The clamp is mounted on the carrier for movement into and out of clamping position, and in the clamping position it permits the bundles to be lowered without bending or distorting the sheets which are otherwise dragging on a stationary support.
Inventors
- 👤 Walter J. Stobb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:41
CPC Classifications
B; B65; B65H; B65H31/00; B65H31/30; B65H31/3036; B65H31/3045; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/422; B65H2301/4223; B65H2301/4224; B65H2301/42242; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/102; Y10S414/103; Y10S414/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
208 words
In a sheet stacker wherein sheets are formed into a stack relationship having a stack top and with the sheet edges disposed along an inclined plane and on and in contact with an inclined support extending along said inclined plane and with the sheets stacked on a stack carrier which engages one end of the stack while the stack is being formed and which moves the stack downwardly along the inclined direction of said inclined support, the improvement comprising a clamp assembly attached to said carrier for movement both relative to and with said carrier, said clamp assembly including a movable portion extending across and being movable along said inclined plane for engaging said top of said stack and being in contact with said stack top at the intersection of said top and the inclined plane of said edges, displacement means for moving said assembly relative to said carrier to thereby position said movable portion for engaging said stack opposite end, and said clamp assembly including a force applicator for pressing said movable portion against said stack opposite end and thereby clamp said stack relative to said carrier for the movement of said stack downwardly along said inclined support and thereby prevent said sheet edges from turning upward.
Claim 2
Dependent Claim
208 words
In a sheet stacker wherein sheets are formed into a stack relationship having a stack top and with the sheet edges disposed along an inclined plane and on and in contact with an inclined support extending along said inclined plane and with the sheets stacked on a stack carrier which engages one end of the stack while the stack is being formed and which moves the stack downwardly along the inclined direction of said inclined support, the improvement comprising a clamp assembly attached to said carrier for movement both relative to and with said carrier, said clamp assembly including a movable portion extending across and being movable along said inclined plane for engaging said top of said stack and being in contact with said stack top at the intersection of said top and the inclined plane of said edges, displacement means for moving said assembly relative to said carrier to thereby position said movable portion for engaging said stack opposite end, and said clamp assembly including a force applicator for pressing said movable portion against said stack opposite end and thereby clamp said stack relative to said carrier for the movement of said stack downwardly along said inclined support and thereby prevent said sheet edges from turning upward.
Claim 3
Dependent Claim
23 words
The sheet stacker as claimed in claim 1, wherein said force applicator is a fluid cylinder assembly for the clamping of said stack.
Claim 4
Dependent Claim
40 words
The sheet stacker as claimed in claim 1, wherein said clamp assembly is pivotally attached at a location on said carrier, and said movable portion is a presser located on said assembly spaced from the location of the pivotal attachment.
Claim 5
Dependent Claim
28 words
The sheet stacker as claimed in claim 3, wherein said displacement means is a fluid cylinder assembly pivotally mounted on said carrier and connected to said clamp assembly.
Claim 6
Dependent Claim
24 words
The sheet stacker as claimed in claim 1, wherein said displacement means and said force applicator are both fluid cylinder assemblies for inducing movement.
Claim 7
Dependent Claim
39 words
The sheet stacker as claimed in claim 5, wherein said fluid cylinder assemblies are both pivotally mounted on said carrier and include a piston, and said piston of said force applicator fluid assembly having said movable portion attached thereto.
Claim 8
Dependent Claim
24 words
The sheet stacker as claimed in claim 5, including a control connected to both of said cylinder assemblies for sequential operation of said assemblies.
Claim 9
Independent Claim
155 words
A method of moving a stack of sheets which were stacked onto a carrier in an inclined position while being formed into a stack having a stack top and with said sheets having edges disposed along an inclined plane and on an inclined support and with one end of said stack against said carrier for downward movement along said support to a position of stack removal, characterized in clamping said stack relative to said carrier by applying pressing apparatus onto said stack top and extending across said inclined plane and in contact with said stack top at the intersection of said stack top with said inclined plane, said pressing apparatus being attached to said carrier for movement relative thereto and therewith, and lowering said carrier and said pressing apparatus downwardly in pressing relation on said edges. along said inclined plane while said stack is being clamped, and thereby prevent said sheet edges from curling upward.
Claim 10
Independent Claim
155 words
A method of moving a stack of sheets which were stacked onto a carrier in an inclined position while being formed into a stack having a stack top and with said sheets having edges disposed along an inclined plane and on an inclined support and with one end of said stack against said carrier for downward movement along said support to a position of stack removal, characterized in clamping said stack relative to said carrier by applying pressing apparatus onto said stack top and extending across said inclined plane and in contact with said stack top at the intersection of said stack top with said inclined plane, said pressing apparatus being attached to said carrier for movement relative thereto and therewith, and lowering said carrier and said pressing apparatus downwardly in pressing relation on said edges. along said inclined plane while said stack is being clamped, and thereby prevent said sheet edges from curling upward.
Claim 11
Dependent Claim
46 words
The method of moving a stack of sheets, as claimed in claim 8, including sequencing the clamping and moving of said stack to initially apply said pressing apparatus and then move said stack downwardly, and to subsequently initially release said pressing apparatus at the downward location.
References Cited (Backward Citations)
US2933314A
Cited
US3739924A
Cited
US3969993B1
Cited
US3969993A
Cited
US4247093A
Cited
US4068837A
Cited
US4311090A
Cited
US4383788A
Cited
US4477218A
Cited
US4541763A
Cited
US4618054A
Cited
US4554867A
Cited
US4588070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |