Dynamic information storage or retrieval – Storage medium structure – Adjuncts or adapters
Reexamination Certificate
1999-05-05
2001-02-20
Ometz, David L. (Department: 2754)
Dynamic information storage or retrieval
Storage medium structure
Adjuncts or adapters
C369S283000, C428S064400, C428S066600
Reexamination Certificate
active
06192025
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to a structure for protecting musical CD, CD-ROM and DVD multimedia compact disc, and more particularly to a structure for protecting the reading area of a compact disc.
BACKGROUND OF THE INVENTION
A digital disc, such as musical CD, MD mini-compact disc, CD-ROM, DVD compact disc, etc., is used to store a large amount of digital data in the form of microscopic pits which are formed densely and serially on the digital disc. The digital disc is generally formed with a transparent protective outer layer for protecting the integrity of data stored in the reading area of the digital disc. The digital disc is played on a device using a laser beam to read the encoded information stored on the disc. It is therefore conceivable that a reading distortion may be resulted from a damaged or contaminated protective layer. For this reason, the user of the compact disc is advised to handle the compact disc carefully.
The Taiwan Patent Publication No. 312232 describes an annular strip, as a prior art, for protecting a compact disc in such a manner that the annular strip is attached fixedly to the rim of the compact disc, so as to prevent the reading area of the compact disc from making contact with a surface at such time when the compact disc is placed on the surface by utilizing the height of the annular strip.
The inventor of the Taiwan Patent Publication No. 312232 discloses another structure for protecting a compact disc to improve the annular strip. The structure comprises a protective film which has a thickness of 60 microns (&mgr;m) or less. The protective film is adhered by static attraction to the surface of the reading side of the compact disk and is also adhered by adhesive to the inner annular portion thereof. Such a protective film as described above has several drawbacks, which are described hereinafter.
The side of the reading area of the compact disc has a protruded ring surrounding the central hole thereof, which will cause the protective film not being able to be attached flatly to the surface of the reading side, especially at the portion near the protruded ring of the compact disc. As a result, the static attracted portion of the protective film is prone to become detached.
The adhesive can not be easily applied to the inner annular portion of the compact disc in terms of the position and the quantity of the adhesive. In addition, the reading area of the compact disc is vulnerable to contamination by the adhesive. Moreover, the adhesive availability must be taken into consideration.
The same inventor, in U.S. Pat. No. 5,757,765, further discloses an improved structure to the invention disclosed in the Taiwan Patent Publication No. 312232, in which an annular adhesive sheet is used to replace the adhesive applied to the inner annular portion of the compact disc. However, the protective film still has a complicated shape at its inner rim portion and suffers the above-mentioned first drawback of the structure disclosed in the Taiwan Patent Publication No. 312232.
SUMMARY OF THE INVENTION
The primary objective of the present invention is therefore to provide a compact disc protection structure free from the shortcomings of the prior art structures described above.
A structure for protecting a reading area at one side of a compact disc constructed according to the present invention comprises:
a transparent circular plastic film having an outer diameter equal to or smaller than an outer diameter of the compact disc, said circular plastic film further having a center hole with a diameter greater than a protruded ring on said one side of the compact disc; and
a two-side-adhesive ring having an inner diameter equal to or greater than the protruded ring of the compact disc, said two-side-adhesive ring further having an outer diameter greater than said inner diameter by 2-5 mm;
wherein one side of said two-side-adhesive ring is adhere to an inner annular portion of said circular plastic film and another side of said two-side-adhesive ring is adhered to said one side of the compact disc with the protruded ring thereof surrounded by the two-side-adhesive ring,
wherein said transparent circular plastic film is concentrically attached to said two-side-adhesive ring, and is attached to the reading area of the compact disc by static attraction.
The present invention further provides a device for applying said structure to the reading area of the compact disc, which comprises:
an alignment ring provided with an inner hole having a diameter substantially equal to the diameter of the center hole of the compact disc, said alignment ring having an outer diameter equal to or greater than the protruded ring of the compact disc and smaller than said inner diameter of said two-side-adhesive ring.
Preferably, said device further comprises a press cover having a hollow cylindrical body, and said hollow cylindrical body has an inner diameter greater than said outer diameter of said alignment ring and an outer diameter smaller than said outer diameter of said two-side-adhesive ring.
The objective, features, functions, and advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
REFERENCES:
patent: 4556968 (1985-12-01), Pelkey et al.
patent: 4879710 (1989-11-01), Ijima
patent: 5020048 (1991-05-01), Arai et al.
patent: 5299186 (1994-03-01), Tsurushima
patent: 5757765 (1998-05-01), Chen
patent: 5787069 (1998-07-01), Lowe et al.
patent: 5922430 (1999-07-01), Biddlecome
patent: 5935673 (1999-08-01), Mueller
patent: 6081501 (2000-06-01), Hunter et al.
patent: 1-105370 (1989-04-01), None
patent: 94/14161 (1994-06-01), None
patent: 95/12881 (1995-05-01), None
Bacon & Thomas
Ometz David L.
LandOfFree
Structure for protecting reading area of compact disc and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Structure for protecting reading area of compact disc and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Structure for protecting reading area of compact disc and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2608865