US4748046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making keys of a keyboard
Assignee: Alps Alpine Co Ltd
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Filing: 1987-02-24
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Granted: 1988-05-31
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Expires: 2007-02-24
Abstract
Abstract A method of making any key of a keyboard having a top surface on which a symbol is formed by padding. An ultraviolet-curing resin is applied by padding to only the surface of a material forming the symbol to form an overcoating layer covering only the surface of the symbol. The layer is cured by ultraviolet radiation.
Inventors
- 👤 Yoshitomo Kuboki
- 👤 Mitsuhiro Okada
- 👤 Hiroo Ookoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:48
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/02; H01H13/12; H01H13/14; B; B05; B05D; B05D1/00; B05D1/28; B05D7/00; B05D7/50; B05D7/52; B05D7/53; B05D7/532; B44; B44C; B44C1/00; B44C1/16; B44C1/165; B44C1/17; B44C1/1733; B44C1/1745; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; B05D5/00; B05D5/06; H01H2209/00; H01H2209/016; H01H2209/02; H01H2219/00; H01H2229/00; H01H2229/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A method of making a key of a keyboard having a top surface on which a symbol for the key is displayed, comprising: applying a first pad having a selected shape and displaying the symbol on the top surface of the key; forming a second pad of ultraviolet-curable resin corresponding to the selected shape of the first pad, and applying the second pad as a protective layer on the first pad; and curing the protective layer of the second pad on the first pad by ultraviolet radiation.
Claim 2
Independent Claim
87 words
A method of making a key of a keyboard having a top surface on which a symbol for the key is displayed, comprising: applying a first pad having a selected shape and displaying the symbol on the top surface of the key; forming a second pad of ultraviolet-curable resin corresponding to the selected shape of the first pad, and applying the second pad as a protective layer on the first pad; and curing the protective layer of the second pad on the first pad by ultraviolet radiation.
Claim 3
Dependent Claim
16 words
A method as set forth in claim 1, wherein said resin does not contain any solvent.
Claim 4
Dependent Claim
14 words
A method as set forth in claim 1, wherein said resin contains silica powder.
Claim 5
Dependent Claim
117 words
A method of making a key of a keyboard according to claim 1, wherein said step of forming and applying the second pad on the first pad includes: preparing an etching plate having an etching groove formed therein of a shape corresponding to the selected shape of the first pad and having an appropriate depth; filling said groove with a layer of an ultraviolet-curable resin to form the second pad; bringing a transferring pad into contact with the second pad of resin to draw it out of said groove; and pressing said transferring pad with the second pad of resin thereon to transfer the second pad onto the first pad on the top surface of the key.
References Cited (Backward Citations)
US4105816A
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US4122225A
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JPS5316402A
Cited
JPS53105542A
Cited
JPS5882756A
Cited
JPS59171418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |