Electrophotographic copier with a capability of automatically setting up optimum process conditions

摘要

An electrophotographic copier selectively operable with various kinds of toner automatically sets up optimum copy process conditions for any particular characteristic of toner to be used when a toner cartridge is replaced. The copy process conditions are changed upon the lapse of a predetermined delay time after the replacement of a toner cartridge. When an old toner cartridge mounted on the copier is replaced with a new toner cartridge which stores toner of a kind that should not be mixed with toner stored in the former, the copier identifies the new toner cartridge and produces an alarm to inhibit the replacement.