Claims
- 1. A method of producing a keytop sheet for a push-button switch, said method comprising:
- positioning within a mold a flexible film sheet and a flexible nameplate sheet having an outer dimension greater than that of said film sheet, with said nameplate sheet positioned over said film sheet and having an outer peripheral portion extending outwardly beyond an outer peripheral portion of said film sheet, and with said outer peripheral portion of said nameplate sheet being bent transversely and confronting an internal surface of said mold;
- injecting molten resin into said mold against a side of said bent outer peripheral portion of said nameplate sheet opposite said internal surface of said mold, thereby urging said bent outer peripheral surface of said nameplate sheet toward said internal surface of said mold, and against a side of said outer peripheral portion of said film sheet opposite said nameplate sheet; and
- solidifying said molten resin and thereby forming a solid frame that is fixed to said outer peripheral portion of said film sheet and that has an outer peripheral side face having affixed thereto said bent outer peripheral portion of said nameplate sheet.
- 2. A method as claimed in claim 1, further comprising removing from said mold said frame and affixed nameplate sheet and film sheet.
- 3. A method as claimed in claim 1, wherein said mold has therein a cavity, and said outer peripheral portion of said film sheet and said outer peripheral portion of said nameplate sheet are positioned within said cavity.
- 4. A method as claimed in claim 1, wherein said nameplate sheet has an opening therethrough at a position inwardly of said outer peripheral portion thereof, with a keytop portion of said film sheet confronting said opening, and further comprising injecting further molten resin into said mold against said keytop portion at a side of said film sheet opposite said nameplate sheet and thereby deforming said keytop portion through said opening into a cavity in said mold, and solidifying said further molten resin and thereby forming a solid keytop that is fixed to said deformed keytop portion of said film sheet.
- 5. A method as claimed in claim 1, wherein said film sheet is of a resin material.
- 6. A method as claimed in claim 1, wherein said nameplate sheet is of a resin material.
Priority Claims (2)
Number |
Date |
Country |
Kind |
5-080049 |
Mar 1993 |
JPX |
|
5-081366 |
Mar 1993 |
JPX |
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Parent Case Info
This is a division of application Ser. No. 08/456,042 filed May 31, 1995, now abandoned, that is a division of application Ser. No. 08/138,065 filed Oct. 20, 1993, now U.S. Pat. No. 5,475,192.
US Referenced Citations (8)
Foreign Referenced Citations (3)
Number |
Date |
Country |
0483898 |
May 1992 |
EPX |
0500330 |
Aug 1992 |
EPX |
2219691 |
Dec 1989 |
GBX |
Divisions (2)
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Number |
Date |
Country |
Parent |
456042 |
May 1995 |
|
Parent |
138065 |
Oct 1993 |
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