Sheet feeding or delivering – Feeding – By means to convey sheet
Patent
1995-09-08
2000-06-20
Skaggs, H. Grant
Sheet feeding or delivering
Feeding
By means to convey sheet
271275, 271198, 198817, 1986261, 198604, 198842, B65H 502
Patent
active
060768266
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention pertains to systems for transporting rectangular sheets of paper, called documents hereafter, particularly inside currency validators where the document is a banknote.
DESCRIPTION OF THE BACKGROUND ART
The U.S. Pat. No. 4,958,715 discloses a transport system comprising multiple pairs of belts disposed to allow a directional change along a transport path.
A problem encountered in such transport systems for validators is related to the construction of the frame of the validator. Said frame is usually made of at least one base plate, on which axes are secured perpendicularly for support of pulleys, the document-carrying belts being supported, and sometimes driven, by said pulleys. One advantage of a single base plate is to provide easy access for validator maintenance and belt replacement; however, the higher cost involved due to the larger diameters of axes that are necessary for this type of construction have led most manufacturers to prefer a frame construction comprising two parallel plates, each plate supporting one end of each axes. This type of two-plate construction allows to use thinner, cheaper rods for axes; however, maintenance is complicated because, if for example a belt has to be replaced, the operator has to completely dismantle a plate, usually the one that is closer to the belt that needs to be changed, remove the belts that are between the removed plate and the belt that has to be replaced, replace the belt and then reverse operations to finally reinstall the plate.
In modern validators, processing of the document comprises several steps, comprising e.g. identifying and authenticating the document by magnetic and/or optical means, rotating the document around a is plurality of axes for subsequent stacking in a predetermined orientation, sorting the document, and punching it out of the belt path into a stack. As a result, the validators are now made of a plurality of sub-parts, each of these being in charge of one of the above-mentioned functions. A single transport system carrying the document through all sub-systems is not easy to maintain; as a result, the problem of serviceability maybe solved by increasing the number of transport systems, hereafter called sub-systems, along the transport path, e.g. allocating one transport sub-system to each sub-part performing a function in the validator. This allows the use of shorter belts, being driven and supported by a smaller number of pulleys, rotating around a smaller number of axles.
SUMMARY OF THE INVENTION
The present invention provides a document validator for validating documents of value, in which a document is carried along a transport path, for example for purposes of indentification, authentication, rotation, sorting or stacking, said validator comprising a transport system comprising a plurality of parallel belts supported by pulleys rotating around axes that are supported by two plates, the position of each of the axes being determined by said plates at either side of the belts, characterized in that the serviceability of the belts is improved by said axes being individually removable from both plates without removing either of said plates.
When a belt that is worn out, has to be replaced, the operator does not have to remove any plate, but only the axles that are inside a volume defined by the belt between the two plates.
The present invention also discloses a system for securing axles (axes) at both ends to the plates in an easily removable manner. In a first case, the axis is made of a rod on which the pulleys are secured, bearings being provided at both ends of the rod for accommodation in corresponding housings in both plates. Such bearings allow rotation but prevent axial movement of the rod. In this type of a rotating rod, the pulleys are secured to the rod. The bearings are prevented from axial movement by circlips engaging in circular recesses in the rod, on each side of a plate.
In a second case, the axis is made of a rod releasably secured by its end to both plates, for e
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Clark, Weighted pinch rolls, Xerox Disclosure Journal vol. 2 No. 6 pp. 57-59, Dec. 1977.
Gerlier Andre
Polidoro Roberto
Mars Incorporated
Skaggs H. Grant
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