Global Patent Index - EP 0978122 A1

EP 0978122 A1 2000-02-09 - DRY BONDED DIGITAL VERSATILE DISC WITH ONE OR MORE LAYERS OF ADHESIVE

Title (en)

DRY BONDED DIGITAL VERSATILE DISC WITH ONE OR MORE LAYERS OF ADHESIVE

Title (de)

TROCKENGEBUNDENE GIGITALE VIELSEITIGE PLATTE (DVD) MIT EINER ODER MEHREREN KLEBSTOFFSCHICHTEN

Title (fr)

DISQUE NUMERIQUE POLYVALENT LIE A SEC ET COMPORTANT UNE OU PLUSIEURS COUCHES D'ADHESIF

Publication

EP 0978122 A1 (EN)

Application

EP 98919858 A

Priority

  • US 9808204 W
  • US 84562897 A
  • US 86645397 A

Abstract (en)

[origin: WO9849681A1] A digital versatile disc ("DVD") (20) for storing digital or digitized information that includes two sub-discs. Each sub-disc has an outer peripheral edge (28, 38), a top surface (34, 44), a bottom surface (36, 46), and a bore (30, 40) having a second peripheral edge (32, 42). The two sub-discs are bonded together by a layer of dry film adhesive (50) which is in contact with the bottom surface (36) of the first sub-disc (24) and the top surface (44) of the second sub-disc (26). The layer of dry film adhesive is spaced a distance (D) from the second peripheral edges of the bores of the sub-discs. A weld (80) located along the peripheral edges of the bores of the sub-discs provides bonding and structural support to the DVD. A hub or central area (85) which is substantially free of any dry film adhesive is located between the weld and the layer of dry film adhesive. The use of a dry film adhesive to bond the component parts of the DVD eliminates many of the deficiencies of hot-melt and UV-curable adhesive bonding methods, particularly the problem of entrapping air in the adhesive. In an alternative form of the invention, multiple layers of adhesive are used and a means for displaying decoration is positioned between the first (103, 106) and second (104, 108) sub-discs.

IPC 1-7 (main, further and additional classification)

G11B 7/26; B32B 31/06; C09J 5/10; G11B 11/00

IPC 8 full level (invention and additional information)

B29C 65/08 (2006.01); B29C 65/48 (2006.01); B29D 17/00 (2006.01); G11B 5/84 (2006.01); G11B 7/26 (2006.01); G11B 23/00 (2006.01); G11B 7/24 (2013.01)

CPC (invention and additional information)

B29C 66/342 (2013.01); B29C 65/08 (2013.01); B29C 65/4815 (2013.01); B29C 65/4845 (2013.01); B29C 66/452 (2013.01); B29D 17/005 (2013.01); B32B 37/04 (2013.01); G11B 5/84 (2013.01); G11B 7/26 (2013.01); G11B 23/0021 (2013.01); B29C 65/4835 (2013.01); B29C 66/71 (2013.01); B29C 67/0044 (2013.01); B29L 2017/005 (2013.01); B32B 2429/02 (2013.01); G11B 7/24 (2013.01)

Combination set (CPC)

B29C 66/71 + B29K 2067/00

Designated contracting state (EPC)

DE GB

EPO simple patent family

WO 9849681 A1 19981105; AU 7255498 A 19981124; EP 0978122 A1 20000209; EP 0978122 A4 20020731

INPADOC legal status


2002-09-11 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20011101

2002-07-31 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20020613

2002-07-31 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): DE GB

2000-05-17 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: REFLEKT TECHNOLOGY, INC.

2000-05-17 [RIN1] INVENTOR (CORRECTION)

- Inventor name: REFLEKT TECHNOLOGY, INC.

2000-02-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991113

2000-02-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): DE GB