GB2072129A - Wrapping device for coin packaging machines - Google Patents

Abstract

A wrapping device (6) for coin packaging machines in which a stack (50) of coins are packed by wrapping a paper strip around the stack, comprises three vertically arranged rollers (9, 10, 11) which, in use, engage the stack of coins between them and rotate it for the wrapping operation, at least two of the rollers (9, 10) having spaced, circumferential grooves (21). The grooved rollers (9, 10) prevent alignment of the corners of adjacent angular coins in the stack during the wrapping operation. <IMAGE>

Description

SPECIFICATION Wrapping device for coin packaging machines The present invention relates to a wrapping device for coin packaging machines, in which a predetermined number of coins are packed in the form of a roll or cylinder of coins by wrapping a stack of coins in a strip of paper whereby the wrapping device is especially adapted for packaging angular coins.

It is generally known in coin packaging machines to supply a certain number of coins to a stacking cylinder wherein an orderly stack of coins is formed, this stack of coins is then removed and conveyed to a wrapping device where the roll of coins is formed by wrapping a strip of paper around the stack of coins and folding over the ends of the strip of paper.

The wrapping device thus substantially comprises a plurality, preferably three, vertically arranged rollers which assume an equidistant angular distance and which engage the stack of coins between themselves. The stack of coins supported at the bottom is then rotated, by virtue of one or more of the rollers being driven, and during this rotary movement the strip of paper is inserted between rollers and stack of coins until the stack is sufficiently wrapped. The ends of the strip of paper project above and below beyond the height of the wrapped stack of coins, and during progressive rotation these free ends of the paper are folded over the end faces of the stack of coins by folding hooks. The completed roll or cylinder of coins is subsequently released from the rollers by the opening out of the triangle of rollers and the cylinder of coins is transferred to a collecting container.

These wrapping devices have proved to be effective in practice in connection with wrapping machines for standard, circular coins. However the situation changes as soon as angular coins which are used in certain countries, are to be wrapped in such an apparatus. In such case it was observed that the whole stack of coins on application of the rollers and at the start of the rotary movement immediately aligned in such a manner that the corners of the individual coins in the whole stack are in perfect register with one another and they retain this position during the entire wrapping and folding operation.

Considerable disadvantages for the operation of the whole packaging machine result herefrom during the handling of angular coins and also with regard to the packaged cylinders of coins.

The rollers of the wrapping device with each rotation of the stack of coins are subjected to hard impacts by each corner of all the coins and are thereby subject to considerable wear. Moreover, the noise level increases during operation of the packaging machine to an extent undesirable for office operation.

Added to this is the fact that in completely packaged rolls of coins, the wrapping paper is stretched over the corners of the coins and cavities formed between the corners which are readily depressed, whilst the corners may stick out through the paper.

An effective remedy for these disadvantages has as yet not been found and also the reduction of the machine output and the reduction of the roller speed did not provide a solution to the arising problems.

The overcoming of the disadvantages led to the object underlying the invention which resides in the improvement of the wrapping device of coin packaging machines in such a manner that a satisfactory wrapping of angular coins is obtained and the disadvantages arising heretofore are removed or minimized.

According to the present invention there is provided a wrapping device for coin packaging machines in which a predetermined number of coins are packed in the shape of a roll or cylinder of coins by wrapping a paper strip around a stack of coins, comprising a plurality of vertically arranged rollers which, in use, engage the stack of coins between them to rotate it for the wrapping operation, and wherein one or more of the rollers are driven characterised by the feature that for wrapping angular coins a roller having a smooth surface and two rollers having grooves are provided, whereby the grooves are succeeded by projecting equidistantly spaced rings and all the rollers form a triangle of rollers in the wrapping position in use, abutting against the stack of coins.

The two rollers provided with slotted or cut grooves are mutually so arranged that each groove of a roller assumes a position opposite a projecting ring of the other rollers, the external diameter of which ring corresponds to the full roller diameter. Three vertically arranged rollers are preferably provided.

The depth of the grooves provided in the rollers corresponds at least to the extent at which the corners of the coins project beyond the endless circumference defined by their main bodies and the height of the grooves and the height of the rings substantially corresponds to the thickness of the individual coins.

As a particuiar advantage of the wrapping apparatus in accordance with the invention in comparison with known apparatus, it has been found that it is now also possible to wrap angular coins into rolls without having to reduce standard machine output. Moreover, no more increased roller wear occurs - the operating noise of the machine remains substantially unchanged and the quality of wrapping of the coin cylinders is considerably improved.

The invention will be described further, by way of example with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of a coin packaging machine with wrapping device and mounted coin counter as working unit; Fig. 2 is a front elevation of the wrapping device as a unit; and Fig. 3 is a plan view of the wrapping device of Fig. 2.

Mounted on a coin packaging machine 1 is a coin counting apparatus 2 in a receiving container 3 in which there are stored coins 5 to be counted and wrapped into coin rolls or cylinders 4.

Packaging of the coins 5 takes place in a wrapping device 6 by means of paper strips into which a stack 50 of coins is rolled. To close up the stack 50 of coins into cylinder 4 of coins, folding hooks 7 and 8 are used which are mounted on holders 70 and fold over the ends of the paper sections.

The wrapping device 6 comprises rubber rollers 9, 10, 11 which in the wrapping position (Fig. 3) are mutually spaced at equidistant angle and form a roller triangle symmetrically abutting against the stack (50) of coins. The rollers 9, 10, 11 each mounted on pivot levers 12, 13, 14 respectively and may be pivotaily displaced by adjusting shafts 15, 16, 17 into an open position for insertion of a completed roll of coins 4 and into the wrapping position (Fig. 3). The two rollers 10 and 11 as principal rollers are driven by means of gearwheels 18 and 1 9, whilst roller 9 rotates freely therewith, and in addition rests against the rocker lever 12 and held against that which is being driven by the torsion spring 20.

To process angular coins 5 the freely rotating roller 9 and the driven roller 10 have equidistantly spaced grooves 21 punched or cut therein and between which rings 22 project to the actual roller diameter. The third roller 11 has a standard roll diameter and a smooth surface.

The flutings or grooves in the rollers 9 and 10 are so arranged that the grooves 21 cut in one roller 10 are opposed by a projecting ring 22 of the other roller 10 and an identical reversed condition applies when regarding from the roller 10.

The depth of the grooves 21 cut into the rollers 9 and 10 corresponds to the extent at which the corners 51 of the coins 5 project beyond the continuous circumference, or is only insignificantly greater so that the coins are forcibly guided in the grooves 21 at their circumferential corners and are unable to yield radially.

The same also applies to the height of the grooves 21 and the height of the rings 22 corresponding to the thickness of the individual coins 5 so that a tightly packaged coin roll or cylinder 4 is formed.

During the wrapping operation, the rollers 9, 10 and 11 abut against the stack 50 of coins (Fig. 3), which is rotated by means of the gearwheels 1 8 and 19 whereby the smooth, ungrooved roller 11 is constantly in contact with the stack 50 of coins and so to speak is rotated therewith over its corners 51. As shown by means of a detailed view in broken lines in Fig. 2 the rollers 9 and 10 have a different function: between these rollers the coins 5 are guided alternately by one ring 22 over the corners 51 in same manner as the smooth roller and with their corners 51 run free in the opposite groove 21 of the grooved backing roller whereby they are only prevented from radial drift in groove 21.

This guiding and freewheel relation between the rollers 9 and 10 changes from coin to coin over the whole stack (50) of coins.

The surprising result is that in the wrapping device in accordance with the invention in the stack (50) of coins they no longer produced any alignment of the individual coins by way of their corners 51, but that the corners are mutually offset and hence provide an approximation to a normal roll of circular coins which may accurately be wrapped by the wrapping paper. Thus, corner impacts and wearing of the apparatus are almost completely prevented and the packaging machine may be operated at full output even when processing angular coins.

The present invention, of course, also fully extends to the possibility of providing all the rollers 9, 10 and 11 with alternate grooves 21 and projecting rings 22 in the manner described although whilst this would only produce additional manufacturing costs, no further advantages would accrue to operating the packaging machine.

Claims (5)

1. A wrapping device for coin packaging machines in which a predetermined number of coins are packed in the shape of a roll or cylinder of coins, by wrapping a paper strip around a stack of coins, comprising a plurality of vertically arranged rollers which, in use, engage the stack of coins between them to rotate it for the wrapping operation, and wherein one or more of the rollers are driven, characterised by the feature that for wrapping angular coins a roller having a smooth surface and two rollers having grooves are provided, whereby the grooves are succeeded by projecting equidistantly spaced rings and all the rollers form a triangle of rollers in the wrapping position in use, abutting against the stack of coins.

2. A wrapping device as claimed in claim 1, in which the grooves cut in one roller assume a position opposite a projecting ring of the other roller, the diameter of which ring corresponds to the diameter of the roller.

3. A wrapping device as claimed in claims 1 and 2, in which the depth of the grooves cut into the rollers corresponds approximately to the distance which the corners of the coins project beyond the circumference of the endless circle defined thereby.

4. A wrapping device as claimed in claims 1 to 3, in which the height of the grooves cut into the rollers and the height of the projecting rings corresponds at least to the thickness of the individual coins.

5. A wrapping device constructed and arranged to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.