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US 6,472,603 B1Granted
Weak current wire
AssigneeTomoegawa Paper Co., Ltd.
InventorYoshio Inoue
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AssigneeTomoegawa Paper Co., Ltd.
InventorYoshio Inoue
Estimating the term…
A weak current wire not susceptive to external electromagnetic waves, lightweight, having a relatively small outer diameter, and applicable to electromagnetic wave shield communication cables and non-underground communication cables not radiating electromagnetic waves externally, such as signal cables, control cables and wire harnesses. The weak current wire according to the present invention is one selected from non-underground communication cables, subscriber lead-in telephone cables, signal cables, control cables and wire harnesses including cables for communication, signal and control and is characterized in that around a cable conductor, paired telephone wires or a wire harness, an electromagnetic wave shield layer of a porous sheet made by making an unsintered metallic fiber sheet from a slurry containing metallic fibers by a paper machine and pressing the unsintered metallic fiber sheet or made by making a metallic fiber sheet from a slurry containing metallic fibers by a paper machine and sintering the metallic fiber sheet is provided. The porous sheets may be impregnated with a thermosetting conductive adhesive.
A weak current wire selected form non-underground communication cables, signal cables, control cables and wire harnesses including cables for communication, signal and control, which is characterized in that around a cable conductor or a wire harness, an electromagnetic wave shield layer of a porous sheet made by making a metallic fiber sheet from a slurry containing metallic fibers by a paper machine and sintering the metallic fiber sheet is provided, wherein said metallic fiber sheet is made of metallic fibers having a fiber length of 1 to 10 mm and a fiber diameter of 1 to 20 μm, and has a basis weight of 30 to 500 g/m2, or said metallic fiber sheet has voids of 50 to 93%.
A weak current wire selected form non-underground communication cables, signal cables, control cables and wire harnesses including cables for communication, signal and control, which is characterized in that around a cable conductor or a wire harness, an electromagnetic wave shield layer of a porous sheet made by making an unsintered metallic fiber sheet from a slurry containing metallic fibers by a paper machine and impregnating or filling the unsintered metallic fiber sheet with a thermosetting conductive adhesive, or of a laminated porous sheet made by laminating a thermosetting conductive adhesive layer on at least one side of the unsintered metallic fiber sheet is provided, wherein said metallic fiber sheet is made of metallic fibers having a fiber length of 1 to 10 mm and a fiber diameter of 1 to 20 μm, and has a basis weight of 30 to 500 g/m2, or said metallic fiber sheet has voids of 50 to 93%.
A weak current wire selected from non-underground communication cables, signal cables, control cables and wire harnesses including cables for communication, signal and control, which is characterized in that around a cable conductor or a wire harness, an electromagnetic wave shield layer of a porous sheet made by making a metallic fiber sheet from a slurry containing metallic fibers by a paper machine, sintering the metallic fiber sheet and impregnating or filling the sintered metallic fiber sheet with a thermosetting conductive adhesive, or of a laminated porous sheet made by laminating a thermosetting conductive adhesive layer on at least one side of the sintered metallic fiber sheet is provided, wherein said metallic fiber sheet is made of metallic fibers having a fiber length of 1 to 10 mm and a fiber diameter of 1 to 20 μm, and has a basis weight of 30 to 500 g/m2, or said metallic fiber sheet has voids of 50 to 93%.
Dependencies are inferred from the claim text.