Claims
- 1. A method of making a membrane panel switch, comprising the steps of:
- (a) providing a sheet of extruded foam-molded polypropylene having a thickness of greater than 2 mm;
- (b) forming apertures for switches in said sheet by cutting said sheet with a blade;
- (c) placing said sheet on a printed circuit board having a pair of contact elements disposed within said apertures;
- (d) placing a clicking plate in at least some of said apertures in contact with one of said contact elements and spaced from the other of said contact elements, said clicking plates each having at least projection with a free end;
- (e) placing a press plate having a spherical upper surface, a lower surface and at least one hole in the lower surface in each said aperture containing a clicking plate, said lower surface contacting said clicking plate and at least one free end extending into at least one lower surface hole; and
- (f) coupling an insulating layer to said sheet extending over said aperture and over said spherical upper surface.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-89311 |
Apr 1987 |
JPX |
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Parent Case Info
This is a division, of application Ser. No. 07/153,675, filed Feb. 8, 1988 now U.S. Pat. No. 4,892,988.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2902357 |
Jul 1980 |
DEX |
Divisions (1)
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Number |
Date |
Country |
Parent |
153675 |
Feb 1988 |
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