System for dispensing sheet material, in particular security doc

Sheet feeding or delivering – Feeding – Multiple supplies

Patent

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Details

271 912, B65H 344, B65H 526

Patent

active

06003856&

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The invention relates generally to a system for dispensing sheet material, and particularly to a system for dispensing security documents, from one of two sheet compartments to a collecting station.
Such a system typically has a separate delivery roller assigned to each sheet compartment acting on the respective foremost sheet of a sheet stack in its respective compartment. Each delivery roller feeds the respective sheet drawn off from the stack to a respective conveyor roller assigned to each compartment. Each conveyor roller feeds the aforementioned sheet to a dispensing conveyor which is common to both sheet compartments. The delivery and conveyor rollers are driven by a stepping motor.
This system is used for the purpose of, for example, dispensing security documents, such as currency notes, of two different nominal values individually to the collecting station. To this end, security documents of one nominal value are in each case stacked in one sheet compartment, and always only one single currency note is drawn off from the respective stack and fed to the dispensing conveyor by the delivery and conveyor roller assigned to this sheet compartment. The dispensing system for different types of security documents therefore has a double module in which two individual modules for dispensing one type of security document in each case are connected via a common dispensing conveyor. A single module contains one sheet compartment and the delivery and conveyor roller assigned to the latter.
A system of this type is known from European Patent EP 0 161 742. In the case of the known system, there is a single stepping motor for driving the delivery rollers and the conveyor rollers of the two individual modules. By reversing the direction of rotation of the stepping motor, security documents are dispensed either from one or from the other individual module. The security documents are fed to a common dispensing conveyor via a shuttle conveyor assigned to each individual module. The shuttle conveyor systems are not suitable for a compact construction, because the systems utilize a significant proportion of the total structural space of an individual module and because additional components are necessary for their implementation.
A further disadvantage of the known system is that the individual modules and the shuttle conveyors are not identical and are thus not simply constructed. Hence, the individual modules or their component parts are also not interchangeable. The production outlay is thus higher than in the case of identical individual modules.


SUMMARY OF THE INVENTION

It is therefore an object of the invention to provide a system for dispensing sheet material which has a simple and compact construction.
This object is achieved, by utilizing two stepping motors which can be operated in opposite directions when dispensing from a sheet compartment. The two stepping motors drive one delivery roller in the first direction of rotation and the conveyor roller of the respective other sheet compartment in the second direction of rotation.
The use of two stepping motors enables integration of the respective shuttle conveyor into the associated conveyor roller of an individual module. This is because the delivery and conveyor roller can be driven in an optimum manner without restrictions arising as a result of the simultaneous driving of delivery and conveyor roller of an individual module. The delivery roller is rotated until the foremost security document has been drawn off, and the conveyor roller then rotates for such a time as is necessary for reliable conveying of the drawn off currency note to the central dispensing conveyor. As a result of this measure, separate shuttle conveyors can be dispensed with, which results in a more compact construction. As a result of the saving of components for the shuttle conveyors, a more simple construction in comparison with the prior art is achieved, and in addition the production outlay is reduced.
Each of the stepping motors drives in each case one

REFERENCES:
patent: 4518158 (1985-05-01), Goi
patent: 4577849 (1986-03-01), Watanabe
patent: 4691910 (1987-09-01), Cargill et al.
Patent Abstracts of Japan 07137870 May 3, 1995, "Bank Note Delivery System", published May 1995.

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