Patent ID: 7364252
Filing Date: 2008-04-29
Classification: B41J

Abstract:
1. A printing apparatus to which at least one printing material container is attachable, wherein the printing material container stores printing material and has a detection terminal, the printing apparatus comprising: a contact detection terminal that contacts to the detection terminal of the printing material container when the printing material container is attached to the printing apparatus; a contact detection circuit that detects contact or non-contact between the contact detection terminal and the detection terminal of the printing material container using a predetermined level of voltage; a high voltage output terminal that outputs a high voltage higher than the predetermined level of voltage; a shorting detector that detects a shorting between the contact detection terminal and the high voltage output terminal; and a high voltage circuit that controls a voltage outputted from the high voltage output terminal, wherein the high voltage circuit reduces or interrupts the voltage outputted from the high voltage output terminal when the shorting is detected.