Variable watt density layered heater
First Claim
1. A layered heater comprising:
- at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness, wherein the thickness varies along the length of the resistive circuit pattern for a variable watt density.
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Accused Products
Abstract
A layered heater is provided with a resistive layer having a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness, wherein the thickness varies along the length of the resistive circuit pattern for a variable watt density. The present invention also provides layered heaters having a resistive circuit pattern with a variable thickness along with a variable width and/or spacing of the resistive circuit pattern in order to produce a variable watt density. Methods are also provided wherein the variable thickness is achieved by varying a dispensing rate of a conductive ink used to form the resistive circuit pattern, varying the feed rate of a target surface relative to the dispensing of the ink, and overwriting a volume of conductive ink on top of a previously formed trace of the resistive circuit pattern.
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Citations
27 Claims
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1. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness, wherein the thickness varies along the length of the resistive circuit pattern for a variable watt density. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a width, wherein a thickness of the resistive circuit pattern varies across the width of the resistive circuit pattern for a variable watt density.
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11. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern comprising a material having a variable composition, wherein the resistive circuit pattern comprises a variable watt density.
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12. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length, a width, and a thickness, wherein the width and the thickness vary along the length of the resistive circuit pattern for a variable watt density.
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13. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length, a width, a spacing, and a thickness, wherein the width, spacing, and thickness vary along the length of the resistive circuit pattern for a variable watt density.
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14. A layered heater comprising:
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at least one resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length, a spacing, and a thickness, wherein the spacing and the thickness vary along the length of the resistive circuit pattern for a variable watt density.
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15. A layered heater comprising:
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a dielectric layer;
a resistive layer formed on the dielectric layer, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies along the length of the resistive circuit pattern for a variable watt density.
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16. A layered heater comprising:
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a substrate;
a dielectric layer formed on the substrate;
a resistive layer formed on the dielectric layer, the resistive layer comprising a resistive circuit pattern, the resistive circuit pattern defining a length and a thickness; and
a protective layer formed on the resistive layer, wherein the thickness of the resistive circuit pattern varies along the length of the circuit pattern for a variable watt density.
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17. A resistive circuit pattern for use in a layered heater, the resistive circuit pattern defining a variable thickness.
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18. A layered heater comprising:
at least one resistive layer comprising a resistive circuit pattern, the resistive circuit defining a variable thickness. - View Dependent Claims (19)
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20. A method of forming a resistive circuit pattern of a layered heater, the method comprising the steps of:
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(a) dispensing a conductive ink at a rate onto a surface; and
(b) varying the dispensing rate of the conductive ink to form a variable thickness resistive circuit pattern.
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21. A method of forming a resistive circuit pattern of a layered heater, the method comprising the steps of:
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(a) dispensing a conductive ink at a rate onto a surface; and
(b) varying a feed speed of the substrate relative to the dispensing of conductive ink to form a variable thickness resistive circuit pattern.
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22. A method of forming a resistive circuit pattern of a layered heater, the method comprising the steps of:
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(a) dispensing a conductive ink at a rate onto a surface;
(b) varying the dispensing rate of the conductive ink; and
(c) varying a feed speed of the substrate relative to the dispensing of conductive ink, wherein a variable thickness resistive circuit pattern is produced.
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23. A method of forming a resistive circuit pattern of a layered heater, the method comprising the steps of:
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(a) applying a volume of conductive ink onto a surface to form a trace; and
(b) applying an additional volume of conductive ink onto the trace, wherein a variable thickness resistive circuit pattern is produced. - View Dependent Claims (24, 25, 26)
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27. A layered heater comprising a means for varying the watt density of a resistive circuit pattern.
Specification