Patent ID: 6123414
Filing Date: 2000-09-26
Classification: B41J

Abstract:
An apparatus for injecting a recording solution of a print head comprising:thin film shape memory alloys having a phase transformed in accordance with a temperature variation;an electric power supply section for inciting said temperature variation of said thin film shape memory alloys;a substrate having space portions for forcibly transforming said phase of said thin film shape memory alloys by a pressure lower than an atmospheric pressure when said thin film shape memory alloys are coupled to an upper portion of said substrate;a passage plate installed to said upper portion of said substrate and formed with liquid chambers for retaining said recording solution to a direct upper portion of said thin film shape memory alloys and formed with a feed path in a side of a wall surrounding said liquid chambers for introducing said recording solution; anda nozzle plate installed over said passage plate and formed with nozzles having dimensions smaller than those of said liquid chambers of said passage plate for enabling said recording solution to be injected in droplet form when said phase of said thin film shape memory alloys is transformed.