Patent US5008002A successfully refreshed from Google Patents.
US5008002A
Expired / Lapsed
US
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Process for producing mold used for obtaining press molded glass article
Assignee: Hoya Corp
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Filing: 1990-01-19
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Granted: 1991-04-16
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Expires: 2010-01-19
Abstract
Abstract The present invention relates to a process for producing a mold for glass press molding which comprises adopting, in the ion plating method to form an i-carbon film, a given hydrocarbon, given voltages, given temperature conditions, etc. According to the process, there could be obtained a mold for glass press molding, having an i-carbon film superior in adhesion to mold base, hardness, lubricity, etc. In this mold for glass press molding, the i-carbon film is less susceptible to peeling and glass releasability is good even after many times of press molding. Therefore, the mold can be used for glass press molding over a long period of time.
Inventors
- 👤 Ken Uno
- 👤 Takuo Fujino
- 👤 Hideki Nakamori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:10
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/44; C23C16/50; C23C16/503; C03; C03B; C03B11/00; C03B11/06; C03B11/08; C03B11/084; C03B11/086; C23C16/22; C23C16/26; C03B2215/00; C03B2215/02; C03B2215/08; C03B2215/10; C03B2215/12; C03B2215/14; C03B2215/24; C03B2215/30; C03B2215/34; C03B2215/72
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A process for producing a mold used for obtaining a press molded glass article, which comprises a step of forming an i-carbon film on a mold base for obtaining a press molded glass article, according to an ion plating method, wherein said ion plating method is effected by, in an ion plating apparatus comprising an anode electrode, a first cathode electrode, a holder for holding said mold base and a reflector extending as far as the vicinity of the mold base holder in such a shape that it surrounds the two electrodes, applying a low voltage between the anode electrode and the first cathode electrode to generate a plasma of ions of a hydrocarbon having a C/H ratio of 1/3 or more, and further applying a voltage of 0.5-2.5 KV between the mold base holder and the anode electrode so that the mold base holder becomes a second cathode electrode relative to the anode electrode while keeping the reflector at the same potential as the first cathode electrode to accelerate the hydrocarbon ions to the direction of the mold base which is being kept at 200°-400° C.
Claim 2
Dependent Claim
187 words
A process for producing a mold used for obtaining a press molded glass article, which comprises a step of forming an i-carbon film on a mold base for obtaining a press molded glass article, according to an ion plating method, wherein said ion plating method is effected by, in an ion plating apparatus comprising an anode electrode, a first cathode electrode, a holder for holding said mold base and a reflector extending as far as the vicinity of the mold base holder in such a shape that it surrounds the two electrodes, applying a low voltage between the anode electrode and the first cathode electrode to generate a plasma of ions of a hydrocarbon having a C/H ratio of 1/3 or more, and further applying a voltage of 0.5-2.5 KV between the mold base holder and the anode electrode so that the mold base holder becomes a second cathode electrode relative to the anode electrode while keeping the reflector at the same potential as the first cathode electrode to accelerate the hydrocarbon ions to the direction of the mold base which is being kept at 200°-400° C.
Claim 3
Dependent Claim
19 words
A process according to claim 1, wherein an ion bombardment treatment is effected prior to the ion plating method.
Claim 4
Dependent Claim
20 words
A process according to claim 1, wherein the mold base has a SiC film formed according to a CVD method.
Claim 5
Dependent Claim
33 words
A process according to claim 1, wherein the hydrocarbon is selected from the group consisting of aromatic hydrocarbons, unsaturated hydrocarbons containing a triple bond, unsaturated hydrocarbons containing a double bond, and saturated hydrocarbons.
Claim 6
Dependent Claim
23 words
A process according to claim 1, wherein the low voltage applied between the anode electrode and the first cathode electrode is 50-150 V.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-15 | 1994-10-15 | 1995-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-15 | 1998-10-15 | 1999-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-15 | 2002-10-15 | 2003-04-16 | $7700.00 | Window Closed / Lapsed |