Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2000-07-06
2001-09-25
Hoang, Tu Ba (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S201000, C219S528000, C219S549000
Reexamination Certificate
active
06294770
ABSTRACT:
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates to a reticulate heater. More particularly, the invention concerns a reticulate heater, which is used on a handle or seat of an automobile, an elbow portion of a complex piping, or the like.
DESCRIPTION OF THE RELATED ART
When in a cold district one rides in an automobile in a severe winter season and grips the handle, it sometimes happens that the palms of the hands get frozen onto the handle due to the water content of their skins. Therefore, providing a heater on the handle has hitherto been proposed. This kind of heater for use on the handle is demanded to rise in temperature in a short time and also to give comfortableness with no unnatural feel of gripping to the driver when he has gripped the handle. These requirements become able to be satisfied for example by putting a reticulate heater on the handle.
However, in case that knitting heater wires into a structure of net meshes, the heater wires become likely to come up at the intersecting points where the heater wires intersect each other. Therefore, there is the likelihood that the heater wires will come up to a covering for covering the heater and that also the heater will become electrically unstable.
With respect to this drawback, it is considered to dispose the heater at a central-in-cross-section portion of the material constituting the handle. However, even when using a heater generating a large amount of heat, a significantly large length of time is inconveniently needed to increase the temperature on account of a delay in the conduction of the heat.
SUMMARY OF THE INVENTION
The present invention has been made in order to solve the above-described conventional drawbacks and has an object to provide a reticulate heater which can be close adhered to a complex curved surface as well and which can be also electrically stabilized very much.
Another object of the invention is to provide a reticulate heater which can be close adhered to a complex curved surface as well and which enables the procurement of a constant amount of heat.
To attain the above object, according to the invention, there is provided a reticulate heater which comprises a net-mesh-like-structured heat generator including a plurality of heater wires each having the same wire diameter of from 0.02 to 0.12 mm, the plurality of heater wires being formed into the net-mesh-like-structured heat generator by a tricot knitting technique wherein loops are vertically formed by vertically knitting the heater wire on a continuous and planar basis, the knit meshes of the tricot knitting having a pitch of 0.5 to 5 mm.
According to the reticulate heater of the invention having the above-described construction, since the heat generator is formed with a tricot knitting technique, the reticulate heater has high elasticity and flexibility. Therefore, the reticulate heater can be close adhered to a complex curved surface as well. Also, the heater wire does not rise at the intersecting portions where the heater wires intersect each other. Therefore, the reticulate heater is electrically stabilized.
Also, according to the invention, there is provided a reticulate heater which comprises a net-mesh-like-structured heat generator including a plurality of heater wires each having the same wire diameter of from 0.02 to 0.12 mm and prepared by covering a heater bare wire with a for-enamel-wire coating, the plurality of heater wires being formed into the net-mesh-like-structured heat generator by a tricot knitting technique wherein loops are vertically formed by vertically knitting the heater wire on a continuous and planar basis, the knit meshes of the tricot knitting having a pitch of 0.5 to 5 mm.
According to the reticulate heater of the invention having the above-described construction, since the heat generator is formed with a tricot knitting technique, the reticulate heater has high elasticity and flexibility. Therefore, the reticulate heater can be close adhered to a complex curved surface as well. In addition, the heater wire is reliably insulated by a for-enamel-wire coating at the intersecting portions where the heater wires intersect each other. Therefore, the resistance value of the heat generator can be made stable. As a result of this, it becomes possible to obtain a stable constant amount of heat generated.
Also, according to the invention, there is provided a reticulate heater which comprises a net-mesh-like-structured heat generator including a plurality of first heater wires each having the same wire diameter of from 0.02 to 0.12 mm and each consisting of a heater bare wire only and a plurality of second heater wires each prepared by covering the heater bare wire with a for-enamel-wire coating, the plurality of first heater wires and second heater wires being formed into the net-mesh-like-structured heat generator by a tricot knitting technique wherein the loops are vertically formed by vertically continuously knitting the first and second heater wires on a planar basis and so that fellow ones of the first heater wires will not intersect each other, the knit meshes of the tricot knitting having a pitch of 0.5 to 5 mm.
According to the reticulate heater of the invention having the above-described construction, since the heat generator is formed with a tricot knitting technique, the reticulate heater has high elasticity and flexibility. Therefore, the reticulate heater can be close adhered to a complex curved surface as well. In addition, the heater wire can be reliably insulated by a for-enamel-wire coating by the second heater wires being knitted in so that fellow ones of the first heater wires will not intersect each other. Therefore, the resistance value of the heat generator can be made stable. As a result of this, it becomes possible to obtain a stable constant amount of heat generated.
Also, according to the invention, there is provided a reticulate heater which comprises a net-mesh-like-structured heat generator including a plurality of heater bare wires each having the same wire diameter of from 0.02 to 0.12 mm, the plurality of heater bare wires being formed into the net-mesh-like-structured heat generator by a tricot knitting technique wherein loops are vertically formed by vertically knitting the heater wire on a continuous and planar basis, the knit meshes of the tricot braiding having a pitch of 0.5 to 5 mm, the plurality of heater bare wires that are formed into the net-mesh-like-structured heat generator by a tricot knitting technique being insulation processed.
According to the reticulate heater of the invention having the above-described construction, since the heat generator is formed with a tricot knitting technique, the reticulate heater has high elasticity and flexibility. Therefore, the reticulate heater can be close adhered to a complex curved surface as well. In addition, the plurality of heater bare wires, which have formed the net-mesh-like-structured heat generator, are each insulation processed. And therefore the resistance value of the heat generator can be made stable. As a result of this, it becomes possible to obtain a stable constant amount of heat generated.
Also, according to the invention, there is provided a reticulate heater in which, preferably, the heater bare wires are each a copper alloy wire containing therein silver. As a result of this, the heater bare wire can have a tensile strength two or three times as high as that of a soft copper wire. Therefore, the heater bare wire can be made thin and highly flexible.
Also, according to the invention, there is provided a reticulate heater in which, preferably, electrodes are connected to both end portions of the net-mesh-like-structured heat generator as viewed in the vertical direction in a state of their being disposed isolated from each other; and each of the electrodes consists of electrically conductive tapes and electrically conductive adhesive for causing the electrically conductive tapes to respectively adhere to an obverse and reverse surface of the net-mesh-like-structured heat generato
Hasegawa Shiro
Kurata Hiroshi
Hoang Tu Ba
Lorusso & Loud
Showa Electric Wire & Cable Co. Ltd.
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