Printer and its reservoir for consumables for bureau machines

摘要

The evaluation involves a printing unit (4) supplied with toner from a reservoir (5). A new reservoir is associated with a card and memory chip (7,9) which initially carries the new amount of toner available for printing. The card (7) is detached from the reservoir (5) and connected to the printer central processing unit (2) via an interface (8). After each printing a calculator (10) in association with the central processing unit (2) estimates the actual amount of toner used and debits the memory chip (9)