Patent ID: 6130689
Filing Date: 2000-10-10
Classification: B41J

Abstract:
An apparatus for injecting recording solution of a print head, comprising:vibration plates having a thin film shape memory alloy of a shape memory alloy phase-transformed in accordance with a temperature variation and at least one second thin film coupled to said film shape memory alloy for regulating the phase transforming quantity;an electric power supply section for inciting said temperature variation of said thin film shape memory alloy;a passage plate installed over said thin film shape memory alloy, and being formed with liquid chambers for retaining said recording solution and formed with a feed path in at least one side of at least one wall plane surrounding each of said liquid chambers for introducing said recording solution;a 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 the form of droplet when said phase of said vibration plate is transformed; andfurther comprising a substrate installed under said vibration plate and having a space portion for allowing said vibration plate to phase-transform.