US3930807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic molding having satin finish type metallic luster
Assignee: Canon Inc
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Filing: 1974-04-24
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Granted: 1976-01-06
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Expires: 1994-04-24
Abstract
Abstract The present invention relates to a plastic molding having satin finish type metallic luster. More particularly, it provides a molding of high accuracy and good appearance. The plastic molding of the present invention is produced by first applying satin finishing to the surface of the molding, providing a conductive coating thereon, applying polishing treatment on the surface of the coating, and forming a metal film thereon by metal plating.
Inventors
- 👤 Tatsumi Kobayashi
- 👤 Tadashi Ito
- 👤 Yoshihide Kamei
- 👤 Teruhisa Oda
- 👤 Toshio Matsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:18
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/18; C23C18/20; C23C18/22; B; B05; B05D; B05D5/00; B05D5/06; B05D5/067; B05D3/00; B05D3/002; B05D3/005; B05D5/02; B05D7/00; B05D7/02; Y; Y10; Y10S; Y10S205/00; Y10S205/917; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9335; Y10S428/936; Y10T; Y10T428/00; Y10T428/12; Y10T428/12472; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A metal-coated plastic molding having a satin finish type metallic luster comprising: a. A plastic molding having a satin finish; b. An intermediate electroless plated layer of electrically conductive material bonded to said satin finished base, said intermediate layer having a mechanically polished uniform surface; and c. An electroplated metal outer layer bonded to said intermediate layer.
Claim 2
Dependent Claim
57 words
A metal-coated plastic molding having a satin finish type metallic luster comprising: a. A plastic molding having a satin finish; b. An intermediate electroless plated layer of electrically conductive material bonded to said satin finished base, said intermediate layer having a mechanically polished uniform surface; and c. An electroplated metal outer layer bonded to said intermediate layer.
Claim 3
Dependent Claim
20 words
A plastic molding according to claim 1 wherein said outer electroplated layer comprises a chromium layer overlying a nickel layer.
Claim 4
Dependent Claim
19 words
A plastic molding according to claim 1 wherein the thickness of the metal film is 5 to 20 μ.
Claim 5
Dependent Claim
106 words
In the method for forming a plastic molding having a satin finish type metallic luster by applying satin finishing to the surface of the plastic molding to make the surface uneven, electrolessly applying a chemical plating to the satin surface to form a conductive coating, and applying an electroplated metal layer over said conductive coating, the improvement which comprises mechanically polishing the conductive coating to form a uniform surface thereon prior to applying said electroplated layer whereby the minimum thickness of said outer layer is about 5 microns, peeling tendencies of said conductive layer are reduced, and said satin finish is protected from deterioration during manufacture.
Claim 6
Dependent Claim
106 words
In the method for forming a plastic molding having a satin finish type metallic luster by applying satin finishing to the surface of the plastic molding to make the surface uneven, electrolessly applying a chemical plating to the satin surface to form a conductive coating, and applying an electroplated metal layer over said conductive coating, the improvement which comprises mechanically polishing the conductive coating to form a uniform surface thereon prior to applying said electroplated layer whereby the minimum thickness of said outer layer is about 5 microns, peeling tendencies of said conductive layer are reduced, and said satin finish is protected from deterioration during manufacture.
Claim 7
Dependent Claim
23 words
A plastic molding according to claim 4 wherein the satin finishing is carried out using an abrasive grain of 80 to 150 mesh.
Claim 8
Dependent Claim
22 words
A plastic molding according to claim 4 wherein the polishing treatment of the conductive coating is carried out using an abrasive grain.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |