US5077120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical disk
Assignee: Pioneer Display Products Corp
•
Filing: 1990-10-09
•
Granted: 1991-12-31
•
Expires: 2010-10-09
Abstract
Abstract An optical disk is provided with a protective layer which is an adhesive which is non-tacky at room temperature in the case of a one sided disk; and which is useful as a tacky adhesive at room temperature in the case of a two sided disk made from two one-sided disks bonded to one another.
Inventors
- 👤 Hiroshi Kato
- 👤 Masataka Uchidoi
- 👤 Masaomi Ebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:57
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/24018; G11B7/24021; G11B7/26; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24843; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/2826
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
183 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, conveying said disk substrate, heating a hot-melt type filming agent, coating said heated and melted hot-melt type filming agent on said reflecting film layer, solidifying said filming agent coated on said reflecting film layer to form a protective coating for said reflecting film layer, wherein said hot-melt type filming agent is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrate, and bonding two said disk substrates with an adhesive material after said solidifying of said filming agent, wherein said adhesive material comprises a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 2
Independent Claim
183 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, conveying said disk substrate, heating a hot-melt type filming agent, coating said heated and melted hot-melt type filming agent on said reflecting film layer, solidifying said filming agent coated on said reflecting film layer to form a protective coating for said reflecting film layer, wherein said hot-melt type filming agent is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrate, and bonding two said disk substrates with an adhesive material after said solidifying of said filming agent, wherein said adhesive material comprises a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 3
Dependent Claim
27 words
A method of manufacturing an optical disk as claimed in claim 1, wherein said filming agent is coated on said reflecting film layer by a roll coater.
Claim 4
Dependent Claim
70 words
A method of manufacturing an optical disk as claimed in claim 1 or 2, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Styrene/isoprene block polymer
(0 to 100)
Styrene/butadiene block polymer
(0 to 100) 100 as a
Styrene/ethylene/butadiene
(0 to 100) mixture
block polymer
Mineral oil 0 to 100
Hydrogenated petroleum resin
100 to 600.
______________________________________
Claim 5
Independent Claim
148 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, conveying said disk substrate, heating a hot-melt type filming agent, coating said heated and melted hot-melt type filming agent on said reflecting film layer, bonding two said disk substrates through said filming agent, and solidifying said filming agent to thereby form two protective coatings bonded together wherein said hot-melt type filming agent is an adhesive material which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 6
Independent Claim
148 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, conveying said disk substrate, heating a hot-melt type filming agent, coating said heated and melted hot-melt type filming agent on said reflecting film layer, bonding two said disk substrates through said filming agent, and solidifying said filming agent to thereby form two protective coatings bonded together wherein said hot-melt type filming agent is an adhesive material which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 7
Dependent Claim
27 words
A method of manufacturing an optical disk as claimed in claim 4, wherein said adhesive material is coated on said reflecting film layer by a roll coater.
Claim 8
Dependent Claim
70 words
A method of manufacturing an optical disk as claimed in claim 4 or 5, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Styrene/isoprene block polymer
(0 to 100)
Styrene/butadiene block polymer
(0 to 100) 100 as a
Styrene/ethylene/butadiene
(0 to 100) mixture
block polymer
Mineral oil 0 to 100
Hydrogenated petroleum resin
100 to 600.
______________________________________
Claim 9
Independent Claim
178 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, coating a first adhesive material on said reflecting film layer by a roll coater, solidifying said first adhesive material coated on said reflecting film layer to form a protective coating for said reflecting film layer, wherein said first adhesive material is a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic disk substrate, and bonding two said disk substrates having said protective coating with a second adhesive material, said second adhesive material comprising a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said second adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 10
Independent Claim
178 words
A method of manufacturing an optical disk, comprising the steps of: preparing a synthetic resin disk substrate having signal pits formed on one surface thereof, forming a reflecting film layer over said signal pits, coating a first adhesive material on said reflecting film layer by a roll coater, solidifying said first adhesive material coated on said reflecting film layer to form a protective coating for said reflecting film layer, wherein said first adhesive material is a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic disk substrate, and bonding two said disk substrates having said protective coating with a second adhesive material, said second adhesive material comprising a hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrate and which maintains its adhesive properties at room temperature, wherein said second adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 11
Dependent Claim
23 words
A method of manufacturing an optical disk as claimed in claim 7, wherein said first adhesive maintains its adhesive properties at room temperature.
Claim 12
Dependent Claim
25 words
A method of manufacturing an optical disk as claimed in claim 7, wherein said first adhesive does not maintain its adhesive properties at room temperature.
Claim 13
Dependent Claim
71 words
A method of manufacturing an optical disk as claimed in claim 7, 8 or 9, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Styrene/isoprene block polymer
(0 to 100)
Styrene/butadiene block polymer
(0 to 100) 100 as a
Styrene/ethylene/butadiene
(0 to 100) mixture
block polymer
Mineral oil 0 to 100
Hydrogenated petroleum resin
100 to 600.
______________________________________
Claim 14
Dependent Claim
190 words
An optical disk comprising: a first disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a second disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a reflective layer overlying the information bearing surface of each of said first and second disk-shaped substrates, a protective coating overlying each of said reflective layers, said protective coatings comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrates and which maintains adhesive properties at room temperature, and means for joining together said protective layers in a facing adjacent relationship, wherein said joining means is adhesive material comprising a solidified hot-melt type filming agent which is not a solvent type adhesive which affects and erodes said synthetic resin disk substrates, and which maintains adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 15
Dependent Claim
190 words
An optical disk comprising: a first disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a second disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a reflective layer overlying the information bearing surface of each of said first and second disk-shaped substrates, a protective coating overlying each of said reflective layers, said protective coatings comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrates and which maintains adhesive properties at room temperature, and means for joining together said protective layers in a facing adjacent relationship, wherein said joining means is adhesive material comprising a solidified hot-melt type filming agent which is not a solvent type adhesive which affects and erodes said synthetic resin disk substrates, and which maintains adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 16
Dependent Claim
64 words
An optical disk as claimed in claim 11, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Styrene/isoprene block polymer
(0 to 100)
Styrene/butadiene block polymer
(0 to 100) 100 as a
Styrene/ethylene/butadiene
(0 to 100) mixture
block polymer
Mineral oil 0 to 100
Hydrogenated petroleum resin
100 to 600.
______________________________________
Claim 17
Dependent Claim
192 words
An optical disk comprising: a first disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a second disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a reflective layer overlaying the information bearing surface of each of said first and second disk-shaped substrates, a protective coating overlying each of said reflective layers, said protective coatings comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrates, and which does not maintain adhesive properties at a room temperature, and means for joining together said protective layers in a facing adjacent relationship, said joining means comprising an adhesive material comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrates and which maintains adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 18
Dependent Claim
192 words
An optical disk comprising: a first disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a second disk-shaped substrate formed of a synthetic resin and having an information bearing surface on which signal pits are formed, a reflective layer overlaying the information bearing surface of each of said first and second disk-shaped substrates, a protective coating overlying each of said reflective layers, said protective coatings comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes said synthetic resin disk substrates, and which does not maintain adhesive properties at a room temperature, and means for joining together said protective layers in a facing adjacent relationship, said joining means comprising an adhesive material comprising a solidified hot-melt type filming agent which is not a solvent-type adhesive that affects and erodes the synthetic resin disk substrates and which maintains adhesive properties at room temperature, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Block polymer 100
Plasticizer 0 to 100
Tackifier 100 to 600.
______________________________________
Claim 19
Dependent Claim
64 words
An optical disk as claimed in claim 13, wherein said adhesive material has a composition comprising the following components in the following approximate weight proportions: ______________________________________
Approximate weight
proportion
______________________________________
Styrene/isoprene block polymer
(0 to 100)
Styrene/butadiene block polymer
(0 to 100) 100 as a
Styrene/ethylene/butadiene
(0 to 100) mixture
block polymer
Mineral oil 0 to 100
Hydrogenated petroleum resin
100 to 600.
______________________________________
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |