WO1994014161A1 - Protective covers for optical discs - Google Patents
Protective covers for optical discs Download PDFInfo
- Publication number
- WO1994014161A1 WO1994014161A1 PCT/AU1993/000635 AU9300635W WO9414161A1 WO 1994014161 A1 WO1994014161 A1 WO 1994014161A1 AU 9300635 W AU9300635 W AU 9300635W WO 9414161 A1 WO9414161 A1 WO 9414161A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical disc
- cover
- optical
- disc
- information
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 80
- 230000001681 protective effect Effects 0.000 title description 21
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 3
- 229920003023 plastic Polymers 0.000 abstract description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical compound C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/24097—Structures for detection, control, recording operation or replay operation; Special shapes or structures for centering or eccentricity prevention; Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B23/00—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 ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
- G11B23/02—Containers; Storing means both adapted to cooperate with the recording or reproducing means
- G11B23/03—Containers for flat record carriers
- G11B23/0301—Details
- G11B23/0313—Container cases
- G11B23/0316—Constructional details, e.g. shape
Definitions
- the invention relates to a protective cover for an optical storage means (such as, for example, a compact disc) to reduce the possibility of damage to its optical surface.
- an optical storage means such as, for example, a compact disc
- optical storage means which are discs, although it will be apparent that it is applicable to other optical storage means.
- optical disc includes, but is not limited to, any optical storage disc, for example text, audio, video, graphics discs or any combination of them.
- Compact discs are currently one of the most important means of storing recorded music and are commonly found in both commercial and domestic situations. Further, it is envisaged that greater use of optical discs, including compact discs, will be made as a means for storing computer software and data as a result of the very high density at which information can be stored on an optical disc. Thus, the already substantial use of optical discs is likely to increase quite significantly.
- Information is read from an optical disc by the interaction of a laser beam with the optical surface of the optical disc.
- the accuracy of the reading of the information stored on the optical disc is partly dependent upon the optical surface of the disc being maintained in as good a condition as it was in at the time of manufacture. This is not always possible because, at the very least, the optical surface is exposed when an optical disc is inserted or removed from a playing apparatus. At these times, it may easily be scratched or otherwise damaged due to the build up of airborne dust particles or by being accidentally bumped against the apparatus, its case or a fingernail or ring of the operator. Although in many cases each occurrence of such damage may not of itself cause a substantial deterioration in the accuracy of reading information from the optical disc, the damage is largely irreversible and eventually there is a noticeable deterioration in the reading of information from the optical disc.
- the factors which result in a deterioration of the accuracy of reading information from an optical disc will also inhibit the accurate writing of information to the optical disc.
- the invention can also be used to protect an optical surface for the accurate writing of information. Accordingly, investigations have been carried out with the view of devising a protective cover for the optical surface which can be semi-permanently attached to the optical disc. It was felt that the attachment should be semi-permanent so that the cover would be attached to the optical disc permanently until the protective cover is damaged. At that stage, the protective cover would be removed in a manner which did not damage the optical disc and replaced with a new one, the damaged protective cover then being disposed of. In this way, the protective covers are sacrificed to preserve the optical surface of the optical disc.
- Such protective covers could only be used if they permitted the reading of information from an optical disc and, where applicable, the writing of information to an optical disc.
- the "top” surface is the surface to which the label identifying the optical disc is usually affixed.
- the “bottom” surface is the surface through which the laser beam passes in order to read information stored underneath the "top” surface.
- a cover for an optical disc having a surface through which information is readable, the cover comprising;
- attachment means to attach the planar member to the surface, the planar member being composed of plastics material which does not interfere with the reading of the information by an optical disc reading apparatus.
- the planar member is in the shape of a disc.
- the cover is removable from the optical disc.
- attachment means is an adhesive.
- adhesive is attached to the surface in areas devoid of information which is readable.
- the attachment means includes at least one peripheral clip adapted to attach to the periphery of the optical disc.
- the attachment means includes an upstanding rim projecting from the planar member, which rim includes an annular recess to receive the periphery of the optical disc.
- attachment means is the application of a static field to a surface of the cover.
- the protective cover may be manufactured from any material which:
- such material may be a polycarbonate.
- the cover could be made from any other material from which the optical surface of the disc itself is manufactured.
- Figure 1 is a plan view of a typical compact disc
- Figure 2 is a plan view of an optical disc cover according to one embodiment of the invention
- Figure 3 is a cross-sectional view of an optical disc cover according to another embodiment of the invention.
- Figure 4 is a perspective view of an optical disc cover according to the same embodiment of the invention represented in figure 3.
- Figure 1 is a representation of a typical compact disc (1) which is commercially available. Such compact discs typically have an inner annular raised portion (2) which is thicker than the body of the compact disc and extends a fixed distance from the central hole (3). In a typical compact disc, the diameter of the overall disc (1) is about 120 mm, the diameter of the raised portion (2) is about 38 mm and the diameter of the central hole (3) is about 15 mm.
- Figure 2 is a representation of an optical disc cover (4) according to one embodiment of the invention.
- the cover (4) has a hole (5) which is adapted to receive the raised portion (2). Typically, the diameter of the cover (4) will be about 122 mm and the diameter of the hole (5) will be about 39 mm.
- a material suitable for the manufacture of an optical disc cover (4) is a non-UV treated polycarbonate sheet of about 0.17mm thickness supplied by Cadillac Plastics Australia of 10 Whitely Parade, Footscray, Victoria, Australia which permits transmission of the laser beam of an optical disc reading apparatus.
- Figure 3 is a cross-sectional representation of another embodiment of the invention. It consists of a compact disc (1) shown in position with an optical disc cover (8).
- the optical disc cover (8) has an upstanding rim (9) from which protrudes an annular ridge (10) to define an annular recess (11) to assist in attaching the optical disc (1) to the optical disc cover (8).
- the raised portion (2) is not shown.
- Figure 4 shows a perspective representation of the protective cover (8) shown in figure 3 together with the compact disc (1) and the raised rim (9). For clarity, the annular ridge (10) is not shown in figure 4.
- an optical disc reading apparatus does not depend for its function upon an optical disc being exactly 120 mm in diameter (or any other particular diameter). The part of the apparatus which receives the optical disc usually holds the optical disc only loosely. Thus, an optical disc which is attached to a protective cover (8) according to the present invention can be played by the optical disc reading apparatus without removal of the protective cover.
- the protective cover does not need to be removed at all from the optical disc until it is damaged whereupon it can be replaced by a new protective cover. Accordingly, the optical surface of the optical disc (7) is protected from exposure to any object which may damage it for other than a very short time when the protective optical disc cover is replaced.
- a protective cover is provided for an optical disc which can be permanently attached to the optical disc while it is being played or stored and need only be removed from the optical disc when it is damaged so that it can be replaced.
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU56203/94A AU681363B2 (en) | 1992-12-08 | 1993-12-08 | Protective covers for optical discs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPL6227 | 1992-12-08 | ||
AUPL622792 | 1992-12-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1994014161A1 true WO1994014161A1 (en) | 1994-06-23 |
WO1994014161A9 WO1994014161A9 (en) | 1994-09-15 |
Family
ID=3776582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1993/000635 WO1994014161A1 (en) | 1992-12-08 | 1993-12-08 | Protective covers for optical discs |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO1994014161A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021928A1 (en) * | 1995-01-10 | 1996-07-18 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
WO1998011542A1 (en) * | 1996-09-13 | 1998-03-19 | Digital Armor Inc. | Protective cover for an optical disc |
US5757765A (en) * | 1996-02-28 | 1998-05-26 | Chen; Yao-Kuo | Disc protection structure |
US5787069A (en) * | 1996-09-13 | 1998-07-28 | Digital Armor Inc. | Protective cover for an optical disc |
FR2765381A1 (en) * | 1997-06-18 | 1998-12-31 | Dennis Lin | Compact disk casing |
GB2328071A (en) * | 1997-07-31 | 1999-02-10 | Hi Tech Developments Limited | Apparatus for protecting and/or repairing an optical surface |
US5912875A (en) * | 1996-09-13 | 1999-06-15 | Digital Armor Inc. | Applicator for protective cover for an optical disc |
WO2000016333A1 (en) * | 1998-09-15 | 2000-03-23 | Stefan Michalski | Data carrier system for durably attaching a material layer which can be provided with an identification marking |
WO2000047495A1 (en) * | 1999-02-09 | 2000-08-17 | Torsten Frederiksen | Package with sealing |
US6192025B1 (en) * | 1999-05-05 | 2001-02-20 | Yong E. Chen | Structure for protecting reading area of compact disc and device for applying same |
US6243356B1 (en) | 1997-04-30 | 2001-06-05 | Rubino, Iii Vincent James | Screwing action playable compact disc case |
US6463026B1 (en) | 1999-09-02 | 2002-10-08 | Digital Innovations, L.L.C. | Optical disc label |
DE10338134A1 (en) * | 2003-08-15 | 2005-03-17 | Tesa Ag | Use of adhesive films for securing and simultaneously covering and protecting optical storage media |
US6874158B2 (en) | 2001-04-24 | 2005-03-29 | Chak Sang Simon Chan | Holder for an optically readable information disc |
US7409698B2 (en) * | 2005-10-15 | 2008-08-05 | Mark Tjensvold | Optical disc case usable in player with disc encased therein |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0051339A1 (en) * | 1980-11-03 | 1982-05-12 | North American Philips Corporation | Optical disc cartridge |
FR2576703A1 (en) * | 1985-01-30 | 1986-08-01 | Martinesco Dimitri | Device for packaging a disk |
US4874085A (en) * | 1982-02-16 | 1989-10-17 | Polygram Gmbh | Storage cassette for high storage density, disc-shaped information carriers |
NL8900365A (en) * | 1989-02-15 | 1990-09-03 | Paulus Gerardus Maria Krijnen | Transparent protective cover for compact recording disc - has thickened rim which clips over CD |
WO1992006904A1 (en) * | 1990-10-22 | 1992-04-30 | Hansen Darrell L | Optical storage disc protector |
-
1993
- 1993-12-08 WO PCT/AU1993/000635 patent/WO1994014161A1/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0051339A1 (en) * | 1980-11-03 | 1982-05-12 | North American Philips Corporation | Optical disc cartridge |
US4874085A (en) * | 1982-02-16 | 1989-10-17 | Polygram Gmbh | Storage cassette for high storage density, disc-shaped information carriers |
FR2576703A1 (en) * | 1985-01-30 | 1986-08-01 | Martinesco Dimitri | Device for packaging a disk |
NL8900365A (en) * | 1989-02-15 | 1990-09-03 | Paulus Gerardus Maria Krijnen | Transparent protective cover for compact recording disc - has thickened rim which clips over CD |
WO1992006904A1 (en) * | 1990-10-22 | 1992-04-30 | Hansen Darrell L | Optical storage disc protector |
Non-Patent Citations (2)
Title |
---|
DERWENT ABSTRACT, Accession No. 86-240442/37, Class T03; & FR,A,2 576 703 (MARTINESCO D), 1 August 1986. * |
DERWENT ABSTRACT, Accession No. 90-288282/38, Class T03; & NL,A,89 00 365 (KRIJNEN PGM), 3 September 1990. * |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2311890B (en) * | 1995-01-10 | 1999-06-23 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
GB2311890A (en) * | 1995-01-10 | 1997-10-08 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
US6240061B1 (en) | 1995-01-10 | 2001-05-29 | Optidisc International Limited | Semi-permanent enclosure for optical data storage device |
US6144632A (en) * | 1995-01-10 | 2000-11-07 | Optidisc International Limited | Semi-permanent enclosure for optical data storage device |
AU714233B2 (en) * | 1995-01-10 | 1999-12-23 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
WO1996021928A1 (en) * | 1995-01-10 | 1996-07-18 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
AU714235B2 (en) * | 1995-01-10 | 1999-12-23 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
AU704323B2 (en) * | 1995-01-10 | 1999-04-22 | Trevor Alan Burroughs | Semi-permanent enclosure for optical data storage device |
US5757765A (en) * | 1996-02-28 | 1998-05-26 | Chen; Yao-Kuo | Disc protection structure |
US5912875A (en) * | 1996-09-13 | 1999-06-15 | Digital Armor Inc. | Applicator for protective cover for an optical disc |
US5787069A (en) * | 1996-09-13 | 1998-07-28 | Digital Armor Inc. | Protective cover for an optical disc |
WO1998011542A1 (en) * | 1996-09-13 | 1998-03-19 | Digital Armor Inc. | Protective cover for an optical disc |
US6243356B1 (en) | 1997-04-30 | 2001-06-05 | Rubino, Iii Vincent James | Screwing action playable compact disc case |
FR2765381A1 (en) * | 1997-06-18 | 1998-12-31 | Dennis Lin | Compact disk casing |
GB2328071A (en) * | 1997-07-31 | 1999-02-10 | Hi Tech Developments Limited | Apparatus for protecting and/or repairing an optical surface |
WO2000016333A1 (en) * | 1998-09-15 | 2000-03-23 | Stefan Michalski | Data carrier system for durably attaching a material layer which can be provided with an identification marking |
WO2000047495A1 (en) * | 1999-02-09 | 2000-08-17 | Torsten Frederiksen | Package with sealing |
US6192025B1 (en) * | 1999-05-05 | 2001-02-20 | Yong E. Chen | Structure for protecting reading area of compact disc and device for applying same |
US6463026B1 (en) | 1999-09-02 | 2002-10-08 | Digital Innovations, L.L.C. | Optical disc label |
US6874158B2 (en) | 2001-04-24 | 2005-03-29 | Chak Sang Simon Chan | Holder for an optically readable information disc |
DE10338134A1 (en) * | 2003-08-15 | 2005-03-17 | Tesa Ag | Use of adhesive films for securing and simultaneously covering and protecting optical storage media |
US7409698B2 (en) * | 2005-10-15 | 2008-08-05 | Mark Tjensvold | Optical disc case usable in player with disc encased therein |
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