Rechargeable device for planning and managing purchases, especially household shopping

摘要

Paper (11a) is used to record the shopping list. The paper is a strip held in a housing (1) and rolled around two spools which can be turned by means of knurled wheels (16). The housing (1) has a clip (19) to fix it to the handle (21) of a shopping trolley (22). A calculator (32) is built into the housing. Shopping to be done is recorded in a window (12) formed in the housing. As he takes the articles off the shelves, the customer records with a writing implement (34) the prices shown on the shelves. At the cash desk he checks the total on the calculator (32). For planning one's shopping and checking the price. IMAGE