Heater and manufacturing method thereof
First Claim
1. A heater comprising:
- a flexible main body which is electrically insulating and flexible;
a plurality of heating elements comprising at least one ceramic which is a positive-characteristic thermistor, said heating elements being connected to said main body along a lengthwise direction of said main body;
a pair of feeders electrically connected to said heating elements, said pair of feeders being attached to said main body; and
at least a pair of flexible retaining members which are electrically conductive and which are provided in said main body so as to be in contact with said feeders and said heating elements, so as to electrically connect and to flexibly retain said feeders and said heating elements by the contact.
1 Assignment
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Accused Products
Abstract
In the case where a heater main body (1) is bent so as to be wound around a subject to be heated such as a water pipe, etc., a heater can stably heats the subject to be heated. A plurality of heating elements (2), which are composed of ceramics as positive-characteristic thermistors and have electrodes on both sides of the heating elements, are sealed along a lengthwise direction of the heater main body (1) with flexibility and electrical insulation at intervals. Pairs of feeders (3) for feeding electricity to the heating elements (2) are provided to the heater main body (1). A holder (5) having electrical conductivity is provided into the heater main body (1) so as to connect the heating elements (2) to the feeders (3) and retain them. The holder (5) reduces faulty electrical connection between the feeders (3) and the heating elements (2), and thus the heat generation by the heating elements (2) can be stabilized.
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Citations
9 Claims
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1. A heater comprising:
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a flexible main body which is electrically insulating and flexible; a plurality of heating elements comprising at least one ceramic which is a positive-characteristic thermistor, said heating elements being connected to said main body along a lengthwise direction of said main body; a pair of feeders electrically connected to said heating elements, said pair of feeders being attached to said main body; and at least a pair of flexible retaining members which are electrically conductive and which are provided in said main body so as to be in contact with said feeders and said heating elements, so as to electrically connect and to flexibly retain said feeders and said heating elements by the contact. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9)
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8. A heater characterized in that:
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a plurality of heating elements comprising positive-characteristic thermistors are sealed into flexible main body comprising a thermoplastic resin along a lengthwise direction of said main body by extrusion molding of said main body, said heating elements have a thickness at rear sides of said heating elements and become thinner at front sides of said heating elements with respect to an extrusion direction of the extrusion molding.
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Specification