Method of producing a thin plastic dial plate and in particular a plastic date wheel
Abstract
Abstract This invention relates to a method of producing a thin plastic dial plate and in particular a plastic date wheel equipped in the mechanism of the wrist-watch and comprises a process of injection-molding said dial plate united with an external or internal circular brim frame or a circular disk instead of said brim frame in order to improve the flow of plastic resin in the injection-molding and dissolve the unevenness and the warp in the annealing, a process of annealing said molded article under nonconfinement, a process of cutting off said brim frame or said disk from said dial plate and a process of annealing said cut dial plate under confinement. Therefore, this invention may provide a light thin plastic dial plate instead of a heavy metallic plate for the meters and may cheaply mass-produce it.
Inventors
- 👤 R Suzuki
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |