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US 5,484,983 AGranted
Electric heating element in knitted fabric
AssigneeTecnit-Techische Textilien und Systeme GmbH
InventorFriedrich Roell
Life of this patent
Estimating the term…
Abstract
An electric heating element is formed of a knit fabric and includes current supply wires and resistance wires which are incorporated in the heating element. The different types of wires extend mutually perpendicularly in the heating element. The conductive wires may be disposed in local or edge regions spaced apart with the knit fabric located therebetween. The knit fabric located between the conductive wires may be formed of non-conductive fibers or resistance wires.
Claims27
An electric heating element comprising:
- a central mesh structure having a pair of edge portions;
- a first and second conductive interlace mesh structure formed by knitting conductive, separated current supply wires, said first conductive interlace mesh structure being attached to one of said pair of edge portions of the central mesh structure and said second conductive interlace mesh structure being attached to the other of said pair of edge portions of the central mesh structure;
- a plurality of electric resistance wires extending between and connected to the current supply wires forming the first and second conductive interlace mesh structures, such that the current supply wires supply current to the resistance wires, the resistance wires extending through and along the central mesh structure for supplying heat to the central mesh structure;
- wherein
- each of the first and second conductive interlace mesh structures form a plurality of electrical connections with each of the resistance wires at each of the pair of edge portions of the central mesh structure such that the current supply to at least some of the resistance wires continues even upon at least one of breakage and inoperability of at least one of the conductive wires.
2 more elements
A method of making an electric heating element, the method comprising the steps of:
- knitting a knitted mesh structure having first and second edge portions;
- forming first and second conductive interlace mesh members from a plurality of electrically conductive, separated, current supply wires;
- attaching the first conductive interlace mesh member to the first edge portion of the knitted mesh structure;
- attaching the second conductive interlace mesh member to the second edge portion of the knitted mesh structure;
- and
- attaching a plurality of resistance wires between the first and second conductive interlace mesh members so that the resistance wires extend from the first conductive interlace mesh member to the second interlace mesh member through the knitted mesh structure and so that each of the first and second conductive interlace mesh members form a plurality of electrical connections with each of the resistance wires so that current supply to at least some of the resistance wires continues even upon at least one of a breakage and inoperability of at least one of the conductive wires.
3 more elements
An electric heating element comprising:
- a central mesh structure having first and second edge portions and being formed of only a resistive interlace mesh structure consisting of a plurality of interconnected electrical resistance wires;
- a first pair of conductive current feed wires attached to the first edge portion of the central mesh structure so as to be spaced from each other and to provide a plurality of electrical connections between each of the resistance wires and each of the first pair of conductive current feed wires;
- and
- a second pair of conductive current feed wires attached to the second edge portion of central mesh structure so as to be spaced from each other and to provide a plurality of electrical connections between each of the resistance wires and each of the second pair of conductive current feed wires.
1 more element
A method of making an electric heating element, the method comprising the steps of:
- forming a central mesh structure having first and second edge portions and being formed of only a resistive interlace mesh structure consisting of a plurality of interconnected electrical resistance wires;
- attaching a first pair of conductive current feed wires to the first edge portion of the central mesh structure so that the first pair of conductive current feed wires are spaced from each other and form a plurality of electrical connections between each of the resistance wires and each of the first pair of conductive current feed wires;
- and
- attaching a second pair of conductive current feed wires to the second edge portion of the central mesh structure so that the second pair of conductive current feed wires are spaced from each other and form a plurality of electrical connections between each of the resistance wires and each of the second pair of conductive current feed wires.
1 more element
Dependencies are inferred from the claim text.