Sheet feeding or delivering – Feeding – With means to interrupt feeding
Patent
1998-01-29
2000-02-08
Walsh, Donald P.
Sheet feeding or delivering
Feeding
With means to interrupt feeding
27125804, 27125805, 271259, B65H 702
Patent
active
060220198
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an apparatus for testing sheet material such as bank notes.
2. Related Art
Such an apparatus is known from DE-PS 32 42 789. The device uses a plurality of sensors each consisting of two components. The two components are disposed on opposite sides of a transport path which transports the sheet material through the sensors. The components of the sensors on one side of the transport path are combined into a group and fastened to a separate mounting plate.
In order to permit access to the transport path in the area of the sensors, e.g. for eliminating sheet material jams or maintenance of the sensor surfaces facing the transport path, the mounting plate is pivoted and can be rotated out of the base plate plane. This rotation opens the sensor gap formed by the component of a sensor and the transport path and exposes the front side of the sensor components facing the transport path and the transport path itself. This permits elimination of a bank note jam or cleaning of the front sides of the sensor components in a simple way.
In order to prevent removal of security-relevant components of sensors by unauthorized persons, these components are protected with an alarm loop. This can be realized in the simplest case in the form of an unbridgeable electric circuit. Since the electric supply lines to the sensors need not be interrupted in the apparatus, the gap formed by the sensors can be opened without triggering an alarm.
Time-consuming adjustment of the sensors after removal of a bank note jam or maintenance of the front sides of the sensor components is unnecessary since the original adjustment is restored when the mounting plate is turned back.
A disadvantage of the apparatus is that the sensors must be disposed on an axis and parallel to each other for effective use of a mounting plate. If there is a large number of sensors this results in an elongate apparatus with a large space requirement. Further, the housings of the individual sensor components should be of like construction if possible. If the housings have different sizes the mounting plate must be adapted to the largest housing, which again involves a relatively large space requirement. In order to protect the sensor components from removal by unauthorized persons one must provide each with an alarm loop.
On these premises, the invention is based on the problem of proposing an apparatus for testing sheet material wherein the sensor gap formed by the sensor components and the transport path can be opened and which simultaneously ensures a spacesaving arrangement of the sensors and protection of the sensor components from removal by unauthorized persons.
BRIEF SUMMARY OF THE INVENTION
The basic idea of the invention is substantially to fasten the sensors consisting of assemblies of one or more components to the front of the base plate as separate units on one and/or both sides of the transport path. The means used for fastening are first fastening means or assembly operable from the back of the base plate and permitting removal of the sensor in the released state. To permit opening of the sensor gap between a certain sensor component and the transport path, these sensor components have second fastening means or assembly operable from the front of the base plate and permitting only motion of the sensor component relative to the transport system in the released state. Removal of the sensor is impossible in the released state of the second fastening means.
An advantage of the apparatus is that since the sensors are fastened to the base plate as separate units there is no prior restriction either on the position of the sensors relative to each other or on the construction of the sensor housing. The sensors can therefore be disposed on the base plate in the most space-saving way.
Since the first fastening means of the sensors are operable only from the back of the base plate, it is possible to remove a sensor component only if the person has access to the back of the base plat
REFERENCES:
patent: 4862064 (1989-08-01), Sumi
patent: 5165044 (1992-11-01), Eschweiler, Jr. et al.
Giesecke & Devrient GmbH
Schlak Daniel Keith
Walsh Donald P.
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