发明授权
US4551000A Process kit and an image forming apparatus using the same 失效
处理工具和使用该工具的成像装置

Process kit and an image forming apparatus using the same
摘要:
A process kit containing consumable members is detachably mountable in the main body of an operating device and includes apparatus for indicating when the useful life of the process kit is about to expire and when it has expired.
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