US Patent 7901044 Printhead having flexible controller connections

A printhead is provided having ejection nozzle integrated circuits, flexible printed circuit boards for connecting electrical signals to associated ones of the integrated circuits and controllers each connected to at least one of the integrated circuits via the respective flexible printed circuit board for controlling the printing operation of the integrated circuits. Each controller is provided on a respective printed circuit board. The printed circuit boards are adjacent one another and each have recessed portions which adjoin recessed portions in the adjacent printed circuit boards. The adjoined recessed portions receive an electrical connecting member for interconnecting the controllers of adjacent printed circuit boards such that each interconnected controller is able to control the printing operation of the integrated circuits.