Patent ID: 8845056
Filing Date: 2014-09-30
Classification: B41J,G03G,G06F,G06K,H04L

Abstract:
1. A cartridge including a memory unit and detachably mounted in an image forming apparatus, the memory unit communicating with the image forming apparatus via two signal lines, the cartridge comprising: a memory configured to store data; a constant current generating portion configured to be connected to a first signal line of the two signal lines, a control portion configured to read out data from the memory and to output a signal according to the data to the constant current generating portion, and a voltage supply portion connected to the first signal line and configured to supply the control portion with a voltage, wherein a second signal line of the two signal lines is connected to a reference voltage, and the constant current generating portion is further configured to change a voltage level of the first signal line in accordance with the signal output from the control portion to transmit the data stored in the memory to the image forming apparatus.