Apparel – General structure
Patent
1983-08-30
1985-10-15
Schroeder, Werner H.
Apparel
General structure
2275, 2DIG7, 112418, 139420R, 139425R, A41D 2724
Patent
active
045464979
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to antistatic clothing to be worn principally in a room which is kept clean (hereinafter referred to as a clean room).
2. Background Art
So-called dust-free clothes have been used as working dress, surgeon's operating gowns, etc., (hereinafter referred to generically as working clothes) worn in clean rooms in plants producing semi-conductor integrated circuits, or hospitals, etc. Especially in a clean room where an extremely clean area is required, a worker must wear clothes which can prevent minute fragments of skin or fine particles of dried skin secretions from being released from the seams or other parts of the clothes, and can also stop the loss of particles of material such as pieces of thread from the clothes.
Such working clothes can be manufactured from a cloth composed of long fibers of nylon, polyester or other dust-resistant material woven to a high density.
However, these working clothes, because of the high electrical insulation resistance of their texture, tend to give rise to static electricity and become statically charged.
Such a charged state not only attracts fine dust particles but also becomes a cause of problems, such as static breakdown of circuit elements produced in a semiconductor integrated circuit production plant, because a worker could become a charged body.
Working clothes that can remove this tendency in static charging have been manufactured by using a cloth made by weaving electroconductive fibers such as carbon or metal fibers parallel to each other at suitable intervals in the base cloth.
Such working clothes, however, have the following shortcomings. When two pieces of cloth 1 and 2 are stitched together along their overlapping edges as shown in FIG. 1, the electroconductive fibers 3, 4 in the respective pieces of cloth tend to go out of alignment with each other and thus it is difficult to stitch the pieces of cloth together so that the electroconductive fibers are aligned properly with each other to ensure perfect electric conduction. In fact, it is often found that the electroconductive fibers are not connected electrically to each other at the seams of the finished clothes. For these and other reasons, there are certain limitations to the possible extent of the reduction of static charge on both working clothes and the wearer's body.
The present invention has for its object the provision of antistatic clothing which is free from the problems of the prior art.
DISCLOSURE OF INVENTION
This invention features the incorporation of an electroconductive material in the overlapped seams or butt-joined seams of working clothes, work shoes and other clothing manufactured from a cloth having parallel electroconductive fibers woven therein. Such a provision of an electroconductive material ensures a perfect electrostatic connection at each of the seams of the clothing to minimize static charging on both the clothing and the wearer's body, thus providing an antistatic garment which is suited for wearing in a clean room.
Further, according to this invention, clothing such as working clothes, work shoes, etc., can be manufactured from a cloth using dust-resistant long fibers woven to a high density. This proves helpful in preventing dust and other contaminants in the clothing from being released therefrom, and thus there antistatic clothing is provided which is ideal to wear not only in an ordinary clean room but also in such a clean room where an extremely clean area is required.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a drawing showing an overlapped seam in conventional clothing.
FIGS. 2 to 9 illustrate embodiments of the present invention, wherein FIG. 2 shows a method of seaming according to this invention,
FIG. 3 shows a part joined by this method,
FIG. 4 illustrates another method of seaming,
FIG. 5 illustrates a third method of seaming,
FIG. 6 shows an example of butt-joining,
FIG. 7 illustrates a piece of cloth with both edges thereof seamed together,
FIG. 8 shows part of a cylindrical cover to be stitched onto
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patent: 3422460 (1969-01-01), Burke et al.
patent: 3986530 (1976-10-01), Maekawa
patent: 4319361 (1982-03-01), Prince
patent: 4422483 (1983-12-01), Zins
Okoshi Koichi
Ono Kazumasa
Kravitz J. L.
Midori Anzen Industry Co., Ltd.
Schroeder Werner H.
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