Patent ID: 7871142
Filing Date: 2011-01-18
Classification: B41J

Abstract:
1. A method for controlling a first ink jet pen and a second ink jet pen, the method comprising: establishing values of a register, the values indicating whether a pulse is or is not to be sent on select lines that extend from a control circuit to the first and the second ink jet pens; sending a first select pulse on a first select line with a first control module of the control circuit after consultation of the register; and sending a second select pulse on a second select line with a second control module of the control circuit after separate consultation of the register; wherein the first and second select pulses are sent at substantially the same time to enable overlap of select pulses, wherein the first ink jet pen has a first number of internal select lines, the second ink jet pen has a second number of internal select lines, and the first number of internal select lines is greater than the second number of internal select lines, wherein the register has a plurality of a bits, a number of the plurality of bits being equal to the first number of internal select lines.