Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1998-03-18
2001-05-15
Aftergut, Jeff H. (Department: 1733)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C029S458000, C427S127000
Reexamination Certificate
active
06231703
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an electromagnetic wave shield magnet, a method for making the magnet and an article of manufacture which acts as a shield from electromagnetic waves. The articles of manufacture made in accordance with the present invention include eyeglasses, masks that protect the head and face of the wearer, and earrings. The purpose of the article of the present invention is to protect the head area of a user and inhibit the harmful effects caused by stray electromagnetic waves generated at home and in the work place.
2. Prior Art
Apparatus such as personal computers, word processors, portable telephones, microwave ovens and the like generate electromagnetic waves which can be harmful to the user. Personal computers, word processors, and the like typically employ cathode ray tubes which operate by means of an electronic gun or electronic beam source that projects an electronic beam onto a luminant and projects a picture. These electronic guns operate at a high voltage and emit electromagnetic waves. Electromagnetic waves are also generated by various kinds of other electronic apparatus such as portable telephones, microwave ovens, car engines, electric shavers, electric dryers and the like.
It is generally believed that stray electromagnetic waves from such apparatuses are harmful to the user. It has been reported that the surface of the cornea of mice and guinea pigs has been injured after long exposure to electromagnetic waves. It is also thought that electromagnetic waves can cause cataracts, brain tumors, and nerve lesions. Such lesions occur on the optic nerves and the periphery nerves such as the auditory nerves and the central nerves. The full effect on a human from stray electromagnetic waves has yet to be fully determined.
It is known that stray electromagnetic waves have a detrimental effect on the measurement precision of medical and scientific apparatus.
Since the intensity of electromagnetic waves is inversely proportional to the square of the distance, it is preferred to stay away from devices that generate electromagnetic waves. Keeping a safe distance, however, is hard or impossible to do with personal computers, portable telephones, microwave ovens and the like. Ceramic powders and ferrite have been used in the past as a shield for medical and scientific apparatus from electromagnetic waves. Typically, the powders and ferrite are applied to the exterior of the device to cut down or eliminate the influence of the waves. These materials have also been applied to the exterior of these devices that generate the electromagnetic waves, such as the exterior shell of the microwave oven to reduce or eliminate the stray electromagnetic waves.
SUMMARY OF THE INVENTION
An electromagnetic wave shield magnet, a method for making the magnet, and an article of manufacture which acts as a shield against harmful electromagnetic waves has now been discovered.
The articles of manufacture which are made in accordance with the present invention include eyeglasses, masks for protecting the head area of the user, aprons worn in the workplace and at home, earrings, and the shell which surrounds medical and scientific devices which are in need of protection from the stray electromagnetic waves.
Broadly, in accordance with the present invention, an electromagnetic wave shield magnet comprises a base magnet which has been treated with an alkali aqueous solution containing chitosan as an essential ingredient therein. The treatment causes the base magnet to become impregnated with the solution and to become negatively ionized after the treatment.
The article of manufacture of the present invention comprises a conductive article on which an electromagnetic wave shield magnet of the present invention has been affixed, or on which a conductive coating and/or an insulating coating has been applied. Preferably, the article made in accordance with the present invention having the electromagnetic wave shield magnet of the present invention affixed thereto also has a conductive coating and, more preferably, an insulating coating thereon. The conductive coating and the insulating coating used in the present invention are liquids which dry and adhere to the conductive article. The conductive coating comprises a conductive pigment, a liquid silicone and hardeners. The insulating coating comprises an insulating pigment, a polyurethane and hardeners.
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Aftergut Jeff H.
Bierman, Muserlian and Lucas
Suehiro Junrou
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