Buckles – buttons – clasps – etc. – Having magnetic fastener
Reexamination Certificate
1999-07-27
2001-05-08
Sakran, Victor N. (Department: 3626)
Buckles, buttons, clasps, etc.
Having magnetic fastener
C024S066100
Reexamination Certificate
active
06226842
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application claims foreign priority benefit under Title 35, U.S.C. §119 of Chinese Patent Application No. 99100120.6, filed Jan. 12, 1999.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a kind of fastener and a method of its manufacture, more particularly, to a waterproof and washable magnetic button and method of manufacturing it.
2. Description of the Related Art
The conventional magnetic button used on articles, such as trunks, cases or bags is usually composed of a top plate and a magnetic button main body. The top plate of the magnetic button has fitting legs, and the magnetic button main body comprises a case, a magnet disposed inside the case and a button cover with fitting legs. The magnetic button is fixed on articles, such as gloves, bags, etc, through the fitting legs disposed on the top plate and back plate for opening and closing the cover of the glove and bag. However, such kind of convenient magnetic button cannot be used on those articles which require opening and closing frequently, such as overcoats, leather coats, suits, etc. The reason is that the conventional magnet does not have strong magnetism (the magnetic field intensity is about 500 Gauss). In order to intensify the magnetism, the only way is to increase the size or thickness of the magnet to 8 mm in the usual case, and thus it is not suitable for use on clothings. Secondly, there is no way to bore a needle hole on the magnetic button for fixing it on clothes as the conventional button is. Thirdly, as the magnetic button is made by pressing the steel sheet, the occurrence of rust cannot be avoided though it is processed with electroplating or anticorrosive treatment. And fourthly, conventional magnetic buttons do not undergo anticorrosive treatment, so it cannot be washed with water.
SUMMARY OF THE INVENTION
In order to overcome the above disadvantages of the magnetic button, extending the application scope of the magnetic button from articles such as gloves, bags, etc. to the category of clothes, the present invention provides a magnetic button which is waterproof and washable. The other object of the present invention is to provide a method of manufacturing a magnetic button which is waterproof and washable.
The object of the present invention can be realized as follows. The magnetic button of the present invention comprises:
a button body having a decorative top button face, said top button face is a projecting extending plane, its periphery being the rim lower than the top button face, said rim portion is provided with a through hole for affixing the magnetic button; its reverse surface is a flat back button face, a cavity is provided in between said top button face and back button face and is isolated from the outside;
a magnet disposed inside the cavity of the button body and each of the two sides is N pole and S pole; and
a steel plate whose shape and size match with said magnet, its edge extends vertically to one direction so that the extended edge surrounds the magnet and places on one of the surfaces of said magnet.
The method of manufacturing the magnetic button comprises the following steps:
Step A: make a button body with non-magnetic material, which button body has a decorative top button face, said top button face has a swelled extending surface, and around it is the edge portion lower than the surface of top button plate, in said edge portion are disposed with through holes for affixing the magnetic button, the reverse side is generally a flat back button face, a cavity being disposed inbetween said top button face and back button face;
Step B: place the magnet into said cavity in a fixed magnetic pole direction, then place in the steel plate so that the steel plate joins with the magnetic due to magnetic force, and the vertically extended edge portion surrounds the magnet;
Step C: inject the resinoid into the cavity of the button body which has been disposed with the magnet and the steel plate, said magnet and steel plate being completely sealed within the button body and combined integrally after being hardened.
Thus the magnetic button made by the method of present invention is waterproof and washable as the magnet is enclosed by non-magnetic material and sealed. In addition there are no through holes disposed around the edge portion so it can be applied conveniently to clothes as ordinary buttons. Furthermore, as the magnetic button according to the present invention can automatically attract and combine each other due to its strong magnetic force, it is well suited for use in cold weather or the situation wherein the button cannot be unbuttoned due to certain reasons, such as when both hands are wearing gloves.
REFERENCES:
patent: 2319292 (1943-05-01), Boggs
patent: 2363914 (1944-11-01), Wakefield
patent: 3086268 (1963-04-01), Chaffin, Jr.
patent: 3378893 (1968-04-01), Labek
patent: 4399595 (1983-08-01), Yoon et al.
patent: 4991270 (1991-02-01), Aoki
patent: 5450658 (1995-09-01), Hicks
patent: 5732451 (1998-03-01), Mars
Hing Ngai Company Limited
Jones Day Reavis & Pogue
Sakran Victor N.
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