| 摘要 |
<p>The invention relates to a combination of an apparatus for the transfer of fungible goods or services, for example, cashless payment for merchandise or services, with a transfer device having marked thereon a plurality of cancellable value units in the form of at least first and second types of optical markings different from one another, and arranged in a predetermined cyclical sequence on at least one track of the transfer device, without the occurrence of any gaps, but with a transition region formed between adjacent markings. The apparatus includes a reading device, inclusive of a light source, and at least first and second light sensors associated with the first and second types of optical markings, respectively. The reading device is arranged for reading and generating signals from the markings, and from the transition regions, and an activatable erasing device erases the markings in dependence of the number of value units to be cancelled. A transport device effects a relative movement between the transfer device, and respectively, the reading and erasing devices along the track, and a control device controls the movement of the transport and erasing devices, disables the transport device, and activates the erasing device, when the erasing device is near one of the transition regions.</p> |
