Sheet feeding or delivering – Feeding – Multiple supplies
Patent
1997-04-24
1998-09-08
Skaggs, H. Grant
Sheet feeding or delivering
Feeding
Multiple supplies
271 901, 271159, 4147958, 4147967, B65H 344, B65H 526
Patent
active
058034463
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a method for singling loose sheet material, in particular bank notes, wherein the sheet material is supplied in an input pocket in the form of a stack in a defined position for vertical feed of the sheet material to a singler. The sheet material is moved within the input pocket vertically from the feed position to a singling position and singled. The invention further relates to an apparatus for singling loose sheet material.
A method and apparatus of the abovementioned type is known for example from EP 0 185 395 B1. In the known method a stack of sheets is transported to the singling apparatus by a stack transport system when the last sheet of the preceding stack has been singled. As soon as the last sheet of a stack has been singled the transport system is activated to supply a further stack. As soon as the stack of sheets is located on a stack table with its leading edge in a defined position for vertical feed of the sheets, the singling run is started.
The known method has the disadvantage that one can only start supplying the next stack of sheets to be singled on the stack table when the last sheet of the preceding stack has left the singling apparatus. One must accordingly interrupt singling to supply a new stack, which proves disadvantageous in particular when singling large piece numbers. Although it is already proposed in the known method to reduce gaps in the singling run by supplying the next stack of sheets to be singled as quickly as possible, this solution is unsatisfactory since the quick transport of a stack of sheets can cause a shift in individual sheets, which can complicate the positioning and thus the singling of the stack of sheets.
The invention is based on the problem of providing a method for singling loose sheet material which permits a higher throughput with no disturbances in the run of a singling apparatus.
This problem is solved by the features stated in the characterizing parts of the independent claims.
The basic idea of the invention is that the next stack to be singled is supplied in the input pocket of the singler in a defined position while the preceding stack is still being singled in the singler. This improves the throughput since the singling run need not be interrupted for supplying the next stack to be singled. Since the next stack to be singled is supplied in overlap with the singling of the preceding stack, there is enough time for proper exact positioning of the stack in the input pocket of the singler. This makes it possible for example to avoid malfunctions in the singling run due to an improperly positioned stack, thereby improving the reliability.
According to a development of the invention, the stack of sheets already being processed in the singler can be brought together in the singling apparatus with the next stack to be singled, resulting in a continuous flow of sheet material within the input pocket of the singler. This has in particular the advantage that the continuous feed of sheet material within the singler permits the singling run to be performed without interruption. This improves the throughput rate further, making the invention excellently suited in particular for high-speed sorting machines to which the sheet material is fed in loose form.
For example the invention can be used for testing fresh printed bank notes or for testing the condition of used bank notes, which are supplied in loose form in the input pockets of the singler in each case. One can combine a plurality of stacks of fresh printed or used bank notes into one accounting unit which is then distributed over a plurality of input pockets. The last sheet of the accounting unit can for example be recognized automatically by a reflected light barrier of the singler.
In a preferred development, the input pockets are of transportable design and can be filled with sheet material at a loading position and transported to one or more singlers. For transporting the input pockets one provides a suitable transport system which can include one or more transport paths whi
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Benker Karl
Demmeler Erwin
Geier Josef
Konig Wolfgang
Leuthold Karl
Giesecke & Devrient GmbH
Skaggs H. Grant
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