Patent ID: 7133144

Claim:
A printer system comprising: a print job processor for generating a print job request, said request including a toner type requirement data; a printer having a structure for receiving a developer unit; a developer unit, containing toner having a type from among a plurality of given types, engaged with said structure for receiving a developer unit; a switch, in said printer, settable to a state indicating which of said types of said toner is contained in the developer unit, and for generating a toner signal representative of said state; a print processor engine associated with said printer, for receiving said toner signal and generating a toner feedback signal in response, and for activating said printer in response to receiving a print activation command; a communication path between said print job processor and said print processor engine, said communication path including a central print controller, wherein said central print controller receives said print job request from said print job processor and receives said toner feedback signal from said print processor engine, and wherein at least one of said print job processor and said central print controller generates said print activation command based on said print job request and said toner signal, the generation is such that it prevents said printer from printing if said toner signal does not match said toner requirement data.