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1. (WO1998049681) DRY BONDED DIGITAL VERSATILE DISC WITH ONE OR MORE LAYERS OF ADHESIVE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/049681 International Application No.: PCT/US1998/008204
Publication Date: 05.11.1998 International Filing Date: 23.04.1998
Chapter 2 Demand Filed: 25.11.1998
IPC:
B29C 65/08 (2006.01) ,B29C 65/48 (2006.01) ,B29D 17/00 (2006.01) ,G11B 23/00 (2006.01) ,G11B 5/84 (2006.01) ,G11B 7/26 (2006.01) ,G11B 7/24 (2013.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65
Joining of preformed parts; Apparatus therefor
02
by heating, with or without pressure
08
using ultrasonic vibrations
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
65
Joining of preformed parts; Apparatus therefor
48
using adhesives
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
D
PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
17
Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback or cylinder records; Producing record discs from master stencils
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
23
Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
5
Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
84
Processes or apparatus specially adapted for manufacturing record carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
26
Apparatus or processes specially adapted for the manufacture of record carriers
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
24
Record carriers characterised by shape, structure or physical properties, or by the selection of the material 
Applicants:
SCHWARTZ, Vladimir [US/US]; US
Inventors:
SCHWARTZ, Vladimir; US
Agent:
KEES, Nicholas, A. ; Godfrey & Kahn, S.C. 780 North Water Street Milwaukee, WI 53202, US
Priority Data:
08/845,62825.04.1997US
08/866,45330.05.1997US
Title (EN) DRY BONDED DIGITAL VERSATILE DISC WITH ONE OR MORE LAYERS OF ADHESIVE
(FR) DISQUE NUMERIQUE POLYVALENT LIE A SEC ET COMPORTANT UNE OU PLUSIEURS COUCHES D'ADHESIF
Abstract:
(EN) 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.
(FR) Ce disque numérique polyvalent ('DVD') destiné à la mémorisation de données numériques ou numérisées comporte deux disques auxiliaires, constitué chacun d'un bord périphérique extérieur (28, 38), d'une face inférieure (36, 46) et d'un alésage (30, 40) comportant un second bord périphérique (32, 42). Ces deux disques auxiliaires sont réunis au moyen d'une couche consistant en un adhésif pelliculaire sec (50) en contact avec la face inférieure (36) du premier disque auxiliaire (24) et la face supérieure (44) du second disque auxiliaire (26). Cette couche d'adhésif pelliculaire sec est séparée d'une distance (D) des seconds bords périphériques des alésages des disques auxiliaires. Une soudure (80) pratiquée le long des bords périphériques des alésages des disques auxiliaires assure le liaisonnement et constitue le support de structure du DVD. Un moyeu, ou zone centrale, (85) sensiblement exempt de tout adhésif pelliculaire sec se trouve entre la soudure et la couche dudit adhésif, L'emploi d'un tel adhésif pelliculaire sec pour réunir les constituants du DVD supprime nombre de défauts dus à l'utilisation d'adhésifs thermo-fusibles et d'adhésifs à séchage par ultraviolet, notamment le piégeage d'air au sein de l'adhésif. Dans une variante de l'invention, on a recours à plusieurs couches d'adhésif tandis qu'un dispositif destiné à afficher un décor est mis en place entre le premier et le second disque auxiliaire.
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Designated States: AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GE, GH, GM, GW, HU, ID, IL, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZW
African Regional Intellectual Property Organization (ARIPO) (GH, GM, KE, LS, MW, SD, SZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0978122AU1998072554