EP 0978122 A1 20000209 - 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
Application
Priority
- US 9808204 W 19980423
- US 84562897 A 19970425
- US 86645397 A 19970530
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
IPC 8 full level
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 (source: EP)
B29C 65/08 (2013.01); B29C 65/4815 (2013.01); B29C 65/4845 (2013.01); B29C 66/1122 (2013.01); B29C 66/342 (2013.01); B29C 66/452 (2013.01); B29C 66/723 (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)
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 9849681 A1 19981105; AU 7255498 A 19981124; EP 0978122 A1 20000209; EP 0978122 A4 20020731
DOCDB simple family (application)
US 9808204 W 19980423; AU 7255498 A 19980423; EP 98919858 A 19980423