US4877475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing information storage disk
Assignee: Panasonic Holdings Corp
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Filing: 1987-12-18
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Granted: 1989-10-31
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Expires: 2007-12-18
Abstract
Abstract Bonding of a protection sheet on the substrate of the information storing disk is made by revolving the substrate and the protection film with viscous adhesive applied therebetween, to spread it by centrifugal force, and, after slowing down the rotation speed, UV light is irradiated through the protection film to harden the adhesive.
Inventors
- 👤 Masami Uchida
- 👤 Seiko Minamide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:04
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/02; B29C37/04; B32; B32B; B32B38/00; B32B38/18; B32B38/1808; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1435; B29C65/1477; B29C65/1483; B29C65/48; B29C65/4805; B29C65/483; B29C65/4845; B29C65/52; B29C65/521; B29C65/78; B29C65/7802; B29C65/7805; B29C65/7808; B29C65/7811; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/32; B29C66/324; B29C66/40; B29C66/41; B29C66/45; B29C66/452; B29C66/50; B29C66/51; B29C66/54; B32B37/00; B32B37/12; B32B37/1284; B32B38/1825; B32B38/1833; B32B38/1841; G; G11; G11B; G11B23/00; G11B23/0014; G11B23/0021; G11B23/0028; G11B23/0035; G11B7/00; G11B7/24; G11B7/26; G11B7/266; B29C65/7841; B29C65/7847; B29C66/53; B29C66/532; B29C66/5326; B29C66/534; B29C66/5344; B29L; B29L2017/00; B29L2017/001; B29L2017/003; B29L2017/005; B32B2310/00; B32B2310/08; B32B2310/0806; B32B2310/0831; B32B2429/00; B32B2429/02; G11B7/24018; G11B7/24024
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A method for making information storage disk, comprising the steps of: applying viscose adhesive on a first disk having a center hole, at a part near said center hole, placing a second disk having a center hole corresponding to said center hole of said first disk on said first disk, to form an assembled disk, in which a face of said first disk confronts a face of said second disk, temporarily mounting said assembled disk on rotating means, temporarily inserting a center boss of said rotating means in both said center holes, while releasably holding only said first disk, revolving said assembled disk around an axis of said center boss by said rotating means to spread said viscose adhesive to all parts of said confronting faces, and revolving said assembled disk around said axis of said center boss by said rotating means, while hardening said adhesive while maintaining said assembled disk temporarily mounted on said center boss.
Claim 2
Independent Claim
157 words
A method for making information storage disk, comprising the steps of: applying viscose adhesive on a first disk having a center hole, at a part near said center hole, placing a second disk having a center hole corresponding to said center hole of said first disk on said first disk, to form an assembled disk, in which a face of said first disk confronts a face of said second disk, temporarily mounting said assembled disk on rotating means, temporarily inserting a center boss of said rotating means in both said center holes, while releasably holding only said first disk, revolving said assembled disk around an axis of said center boss by said rotating means to spread said viscose adhesive to all parts of said confronting faces, and revolving said assembled disk around said axis of said center boss by said rotating means, while hardening said adhesive while maintaining said assembled disk temporarily mounted on said center boss.
Claim 3
Dependent Claim
30 words
A method in accordance with claim 1 wherein speed of revolving of said assembled disk in said hardening is lower than that in said revolving to spread said viscose adhesive.
Claim 4
Dependent Claim
15 words
A method in accordance with claim 1, wherein said viscose adhesive is a UV-hardening adhesive.
Claim 5
Dependent Claim
57 words
A method in accordance with claim 1, wherein after slowing down speed of revolving of said assembled disk upon completion of said spreading, excessive amount of adhesive coming out at peripheral edge part of said assembled disk is scraped by touching a sucking nozzle to said peripheral edge part said sucking nozzle being connected to suction means.
Claim 6
Dependent Claim
35 words
A method in accordance with claim 4, wherein said sucking nozzle has substantially flat opening to touch said peripheral edge part, made in vertically oblong oval or rectangle shape with a pipe of thin sheet.
Claim 7
Dependent Claim
38 words
A method in accordance with claim 1, wherein said center boss has a resiliency, said first disk is mounted by lightly pressing to said center boss and said second disk is mounted by loosely fitting said center boss.
Claim 8
Dependent Claim
33 words
A method in accordance with claim 1, wherein said center boss has an upward-narrowing taper, and said first disk is mounted on said center boss by pressing said first disk onto center boss.
Claim 9
Dependent Claim
34 words
A method in accordance with claim 6, wherein said center boss has an upward-narrowing taper, and said first disk is mounted on said center boss by pressing said first disk onto said center boss.
References Cited (Backward Citations)
US2632725A
Cited
US3217088A
Cited
US3968972A
Cited
US4227347A
Cited
US4549922A
Cited
US4611553A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |