EP0243517A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method for producing information storage disk
Assignee: Panasonic Holdings Corp
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Filing: 1986-04-28
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Granted: —
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Expires: 2006-04-28
Abstract
Abstract Bonding of a protection sheet (9) on the substrate of the information storing disk is made by revolving the substrate (1) and the protection sheet (4) with viscose adhesive (26) applied therebetween, to spread it by centrifugal force, and after slowing down the rotation speed UV light is irradiated through the protection sheet (4) to harden the adhesive.
Inventors
- 👤 Masami Uchida
- 👤 Seiko Minamide
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 22:40
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/48; B29C65/52; B29C65/521; B29C35/00; B29C35/02; B29C35/08; B29C35/0888; B29C37/00; B29C37/02; B29C37/04; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29C65/02; B29C65/14; B29C65/1403; B29C65/1406; B29C65/1429; B29C65/1435; B29C65/1477; B29C65/1483; B29C65/4805; B29C65/483; B29C65/4845; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/32; B29C66/324; B29C66/40; B29C66/41; B29C66/43; B29C66/433; B29C66/45; B29C66/452; G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B7/266; B29C65/78; B29C65/7841; B29C65/7847; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29K; B29K2995/00; B29K2995/0018; B29K2995/0026; B29K2995/0027; B29L; B29L2017/00; B29L2017/001; B29L2017/003; B29L2017/005; G11B7/24018; G11B7/24024
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
137 words
Method for making information storage disk, comprising the steps of: applying viscose adhesive 26 on a first disk 1 having a center hole 6, at a part near said center hole, placing a second disk 4 having a center hole 7 corresponding to said center hole 6 of said first disk 1 on said first disk 1, to form a laminated disk 1+4, mounting said laminated disks 1+4 on rotating means 20, inserting a center boss 25, 35 of said rotating means 20 in said center holes 6,7, revolving said laminated disk 1+4 around an axis of said center boss 25, 35 by said rotating means to spread said viscose adhesive 26 to all parts of contacting faces, and hardening said adhesive 26 in said state of mounting said laminated disks on said center boss 25, 35.
Claim 2
Dependent Claim
137 words
Method for making information storage disk, comprising the steps of: applying viscose adhesive 26 on a first disk 1 having a center hole 6, at a part near said center hole, placing a second disk 4 having a center hole 7 corresponding to said center hole 6 of said first disk 1 on said first disk 1, to form a laminated disk 1+4, mounting said laminated disks 1+4 on rotating means 20, inserting a center boss 25, 35 of said rotating means 20 in said center holes 6,7, revolving said laminated disk 1+4 around an axis of said center boss 25, 35 by said rotating means to spread said viscose adhesive 26 to all parts of contacting faces, and hardening said adhesive 26 in said state of mounting said laminated disks on said center boss 25, 35.
Claim 3
Dependent Claim
29 words
Method in accordance with claim 1 wherein speed of revolving of said laminated disk in said hardening is lower than that in said revolving to spread said viscose adhesive.
Claim 4
Dependent Claim
32 words
Method in accordance with claim 1 or 2 wherein, after making said viscose adhesive 26 spread by weight of said second disk 4 overriding thereon, said revolving to spread is carried out.
Claim 5
Dependent Claim
14 words
Method in accordance with claim 1, wherein said viscose adhesive is a UV-hardening adhesive.
Claim 6
Dependent Claim
58 words
Method in accordance with claim 1, wherein, after slowing down speed of revolving of said laminated disk upon completion of said spreading, excessive amount of adhesive coming out at peripheral edge part 27 of said laminated disk is scraped by touching a sucking nozzle 31 to said peripheral edge part said sucking nozzle being connected to suction means.
Claim 7
Dependent Claim
34 words
Method in accordance with claim 5, 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 8
Dependent Claim
37 words
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 9
Dependent Claim
33 words
Method in accordance with claim 1 or 7, wherein said center boss 35, 38, 40 has an upward-narrowing taper and is pressed to said first disk at least during said revoving. FIGs. 12-16
Claim 10
Dependent Claim
53 words
Apparatus for manufacturing information storage disk comprising a rotary holder 20 for holding substrates 1, 4 to be bonded each other to form a disk, and being capable of revolving at a higher speed for centrifugal spreading of viscose adhesive 26 and at a lower speed for at least hardening said viscose adhesive.
Claim 11
Dependent Claim
53 words
Apparatus for manufacturing information storage disk comprising a rotary holder 20 for holding substrates 1, 4 to be bonded each other to form a disk, and being capable of revolving at a higher speed for centrifugal spreading of viscose adhesive 26 and at a lower speed for at least hardening said viscose adhesive.
Claim 12
Dependent Claim
27 words
Apparatus for manufacturing information storage disk in accordance with claim 9, wherein said hardening is made by a UV-exposure 29 to a UV polymerization resin adhesive 26.
Claim 13
Dependent Claim
50 words
Apparatus for manufacturing information storage disk in accordance with claim 9, which further has a sucking nozzle 31 having an opening for light-touching to peripheral edge part of said disk for scraping excessive adhesive thereon and connected by its other end to suction means for removal of said excessive adhesive.
References Cited (Backward Citations)
US4313190A
Cited
EP0139478A1
Cited
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