Prisudregnende elektronisk vægt

摘要

Price-computing weighing machines for self-service purposes conventionally have an input keyboard with key pads, 20,20', the key pads 20,20' being equipped with pictographs of commodities, the price per kilogram of which is entered in the weighing machine by means of the respective key pad 20,20'. To adapt to the particular scope of the range of commodities on offer, according to the invention the weighing machine is equipped with exchangeable keyboard membranes 19' of differing key-field division, and the weighing machine is set to the newly attached key sheet whenever the keyboard membrane 19' is changed.