Key top plate and a method for manufacturing the same
AssigneeTeikoku Tsushin Kogyo Co., Ltd.
InventorsTatsuya Okamura, Kimitane Kimura, Yasuo Kojima, Atsushi Hari, Shinji Mizuno
Life of this patent
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Abstract
A first film plate 20 and a second film plate 40, each made of flexible resin film, are attached to a top surface and a bottom surface of a key top 30 made of mold-resin, respectively, so as to cover the key top 30. The first film plate 20 is pressed upward to form a recessed portion 23, the key top 30 is molded within this recessed portion 23. The second film plate 40 is arranged on the bottom surface of the key top 30. All of the first film plate 20, the key top 30, and the second film plate 40 are transparent. Decorative layers 21 and 41 are formed on the first film plate 20 and the second film plate 40, respectively.
Claims9
A method of manufacturing a key top plate, comprising:
- placing a first film plate on a second film plate, each of the first film plate and the second film plate comprising a flexible transparent resin film;
- clamping the first film plate and the second film plate between a first die and a second die, the first die and the second die being shaped and arranged to form a key top cavity therebetween;
- injecting molten mold-thermoplastic resin into the key top cavity between the first film plate and the second film plate so as to fill the key top cavity to thereby form a mold-thermoplastic resin key top body with the first film plate attached to a top surface of the key top body and with the second film plate attached to a bottom surface of the key top body;
- and
- removing the first die and the second die after the molten mold-thermoplastic resin has set so as to obtain a key top including the key top body, the first film plate attached to the top surface of the key top body, and the second film plate attached to the bottom surface of the key top body.
Dependencies are inferred from the claim text.