Seiko Epson Corporation

Yukiyoshi Icyu

Kiyohiko Takemoto

Shuichi Yamaguchi

Akio Yamamori

Kazushige Haketa

A photosensitive resin film is pressed onto the surface of nozzle plate , with one portion entering the inside of nozzle . Then, by ultraviolet radiation directed from the rear surface of nozzle plate , the inside the nozzle portion hardened as to form a plug , and at the same time the portion of photosensitive resin film directly above nozzle is hardened by the ultraviolet radiation to form an extensive portion , of a size at least that of nozzle diameter d, but no larger than 1.4 times that of nozzle diameter d. Finally, using the shape of extensive portion , an ink-repellent eutectoid plating coating layer is applied to the whole surface of nozzle plate with the exception of the edge of nozzle covered by the extensive portion, forming on that surface a water-repellent surface that does not cause deviation in the flight of ink droplets, while restricting the lining of the inside of nozzle with the coating layer.

Nozzle plate and method for surface treatment of same

A nozzle plate free from stray fly and defective jetting is achieved by a method which has a first step of putting a photosensitive resin film 5 in pressure contact with a back surface of a nozzle plate 1. A part of the photosensitive resin film 5 is caused to step into a nozzle 4 by controlling the viscosity thereof by changing temperature. Then, the thus processed photosensitive resin film 5 is hardened by injecting ultraviolet rays thereto. Next, a front surface 2 of the nozzle plate 1 is subjected to a eutectoid plating 6 process. By regulating a step coverage d of a part of the eutectoid plating 6 into the nozzle 4 by the hardened photosensitive resin film 5, a-nozzle plate having consistent nozzles, each being free from stray fly and defective jetting can be formed.

Nozzle plate for ink jet printer and method of manufacturing said nozzle

A photosensitive resin film is pressed onto the surface 1 of nozzle plate 1, with one portion entering the inside of nozzle, then by ultraviolet radiation directed from the rear surface of nozzle plate the intruded portion is hardened as plug, at the same time the portion of photosensitive resin film directly above nozzle being hardened by the ultraviolet radiation to form an extensive portion, of a size at least that of nozzle diameter, being no larger than 1.4 times that of nozzle diameter; finally, using the shape of extensive portion, an ink-repellent eutectoid plating coating layer is applied to the whole surface of nozzle plate with the exception of the edge of nozzle, forming on that surface, a water-repellent surface that does not cause deviation in the flight of ink droplets, while restricting the lining of the inside of nozzle with the coating layer.

A nozzle plate free from stray fly and defective jetting is achieved by a method which has a first step of putting a photosensitive resin film 5 in pressure contact with a back surface of a nozzle plate 1. A part of the photosensitive resin film 5 is caused to step into a nozzle 4 by controlling the viscosity thereof by changing temperature. Then, the thus processed photosensitive resin film 5 is hardened by injecting ultraviolet rays thereto. Next, a front surface 2 of the nozzle plate 1 is subjected to a eutectoid plating 6 process. By regulating a step coverage d of a part of the eutectoid plating 6 into the nozzle 4 by the hardened photosensitive resin film 5, a nozzle plate having a consistent nozzles, each being free from stray fly and defective jetting can be formed.

Growing community of inventors

Nagano, Japan

Yukiyoshi Icyu