Colour coding price system for self-service stores - has prices displayed on board against colour code of articles

摘要

In self-service stores each article on sale carries a ticket indicating its price. When prices change a great deal of labour is involved in sticking the new price tickets onto each article. To eliminate this labour it is proposed to use tickets on which the size and other details are indicated by a colour code using a number of different colours. A board on display lists every article on sale according to its colour code and indicates its price. When prices change only the figures on the board need be changed.