Electricity: conductors and insulators – Conduits – cables or conductors – Insulated
Reexamination Certificate
1999-05-27
2001-01-16
Kincaid, Kristine (Department: 2831)
Electricity: conductors and insulators
Conduits, cables or conductors
Insulated
C174S069000
Reexamination Certificate
active
06175081
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an improved structure of a signal transmission line, wherein the material of the cable fibers is DU-PONT KEVLAR (polyamide) or nylon, besides, the cables are tightly wound or twisted by copper wires with good conductivity. The material of the cables is DU-PONT KEVLAR or nylon with high tension-resistance, good flexibility and high heat-tolerance. Therefore, the signal transmission line is not easily broken and the signals can be transferred at any time. Therefore, the defect that a prior art signal transmission line is easily broken is improved. Besides, the cables of the signal transmission line are tightly wound and twisted by copper wires, so that the copper wires are densely arranged. Therefore, when the signal transmission line is wound or bent, no gap is formed between copper wires and the signal transmission line has a more preferred flexibility and softness, thus the signal transmission line is more easily wound. Furthermore, the signal transmission line is easier to be welded or pressed into a terminal without breaking.
With reference to
FIG. 4
, a prior art signal transmission line
20
, such as that used in the receiver and transmitter connected to a telephone, or a transmission line used in notebook computer, is illustrated. The transmission line
20
is formed by a plurality of cables
7
. The material of the cables
7
is nylon. A copper foil
8
with good conductivity is tightly wound on the cables
7
and a layer of insulator
9
encloses the outer surface of the cables
7
. The material of the insulator
9
is nylon and the enclosed signal transmission line
10
has a flat and curled shape.
However, in the prior art transmission line
20
, when a copper foil
8
winds the cables
7
, since the copper foil
8
has a flat shape, when the transmission line
20
is curled, gaps will generate between different copper foils
8
. Thus, it is needed to wind the copper foil on the cables
7
twice. Moreover, the transmission line
20
has no sufficient softness, so that the transmission line as a poor flexibility and is not easily curled. Meanwhile, during manufacturing of the copper foil
8
, the copper wires need to be pressed by a roller so as to form as a flat plate. Therefore, the manufacturing process is complicated and the resistance thereof is enlarged. As a result, poor signal transmission is induced.
SUMMARY OF THE INVENTION
Accordingly, the object of the present invention is to provide an improved structure of a signal transmission line, wherein the signal transmission line is formed by a plurality of cables, the material of the cables is DU-PONT KEVLAR or nylon, besides, the cables are tightly wound or twisted by copper wires with good conductivity, furthermore, a layer of insulator covers the outer surfaces of the cables, the material of the insulator is a nylon elastomer (PEBAX). The signal transmission line has a flat and bendable configuration. The material of the cables is DU-PONT KEVLAR or nylon with high tension-resistance, good flexibility and high heat-tolerance. Therefore, the signal transmission line is able to serve as a telephone wire or serves to transfer signals between computers or other communication devices. Therefore, the signal transmission line is not easily broken and the signals are transferred at any time. As a consequence, the prior art defect, such as using a copper foil as material which is easily broken, is improved.
Another object of the present invention is to provide an improved structure of a signal transmission line, wherein the cables of the signal transmission line are tightly wound and twisted by copper wires, so that the copper wires are densely arranged. Therefore, when the signal transmission line is wound or bent, no gap is formed between cooper wires and the signal transmission line has a more preferred flexibility and softness. Thus, the signal transmission line is more easily wound. Furthermore, the signal transmission line is more easily welded to or pressed into a terminal without breaking.
A further object of the present invention is to provide an improved structure of a signal transmission line, wherein since the copper wires are used directly, there is no need for further finishing to form a flat copper foil. Thus, the whole cost is reduced and the conductivity of the copper wires is improved while the resistance of the wire is stable, so as to have a good conductivity and transmission effect.
The present invention will be better understood and its numerous objects and advantages will become apparent to those skilled in the art by referencing to the following drawings in which:
REFERENCES:
patent: Re. 31197 (1983-04-01), Cocco
patent: 2998840 (1961-09-01), Davis
patent: 3823253 (1974-07-01), Walters et al.
patent: 4090763 (1978-05-01), Congdon et al.
patent: 4683349 (1987-07-01), Takebe
patent: 4861947 (1989-08-01), Altermatt et al.
patent: 4975543 (1990-12-01), Saunders
patent: 5500489 (1996-03-01), Shah et al.
patent: 5516986 (1996-05-01), Peterson et al.
patent: 5711116 (1998-01-01), Hasan
Kincaid Kristine
Nguyen Chau N.
Rosenberg , Klein & Lee
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