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A system for sampling a heated product comprising a disposable first subassembly and a physically separate reusable second subassembly. Prior to use, the two subassemblies are able to form a rigid connection. As a result of forming this connection, a portion of an electric heating circuit is inserte

A system for sampling a heated product comprising a disposable first subassembly and a physically separate reusable second subassembly. Prior to use, the two subassemblies are able to form a rigid connection. As a result of forming this connection, a portion of an electric heating circuit is inserted into an interior space of an applicator head. After forming the connection, the first subassembly is broken, the electric heating circuit is turned on, and the applicator head is used to apply product.

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1. A system for sampling a heated product comprising: a disposable first subassembly that comprises: a reservoir that is capable of holding a product,an elongated neck that is connected to the reservoir in a detachable manner, anda hollow applicator head that depends from the elongated neck into the

1. A system for sampling a heated product comprising: a disposable first subassembly that comprises: a reservoir that is capable of holding a product,an elongated neck that is connected to the reservoir in a detachable manner, anda hollow applicator head that depends from the elongated neck into the reservoir;wherein a portion of the applicator head seals off the reservoir from the ambient atmosphere;a reusable second subassembly that is physically separate from the first subassembly, that comprises: a handle,a power source located in the handle;an electric circuit housing that is opened at an upper end and a lower end, that is able to form a rigid, detachable connection to the elongated neck;an electric heating circuit, that passes through the electric circuit housing, such that a heat generating portion of the heating circuit emerges from the lower end of the housing;wherein when the electric circuit housing is made to form a rigid connection to the elongated neck, then the heat generating portion is disposed inside the applicator head. 2. A system for sampling a heated product comprising: a disposable first subassembly that comprises: a reservoir that is capable of holding a product,an elongated neck that is connected to the reservoir in a detachable manner, anda hollow applicator head that depends from the elongated neck into the reservoir;wherein a portion of the applicator head seals off the reservoir from the ambient atmosphere; anda reusable second subassembly that comprises: a handle,a power source located in the handle;an electric circuit housing that is opened at an upper end and a lower end, that is detachably connected to the elongated neck;an electric heating circuit, that passes through the electric circuit housing, such that a heat generating portion of the heating circuit emerges from the lower end of the housing into the applicator head. 3. The system of claim 2 wherein a top end (1a) of the reservoir is connected to a bottom end of the elongated neck, such that an orifice of the reservoir is surrounded by the elongated neck. 4. The system of claim 3 wherein the reservoir and elongated neck articulate along a surface of joining that is relatively weak compared to the surrounding structure. 5. The system of claim 3 wherein the reservoir comprises a wiper element that is integrally molded around the perimeter of the orifice. 6. The system of claim 2 wherein the lower end of the electric circuit housing is provided with threads that are engaged with threads provided in the elongated neck. 7. The system of claim 2 wherein the electric heating circuit comprises a printed circuit board and the heat generating portion comprises a plurality of individual, discrete resistive heating elements supported on a lower portion of the printed circuit board, outside of the electric circuit housing. 8. The system of claim 7 wherein the printed circuit board comprises a substrate that is non-conductive to electricity, and that supports electronic components and electrical leads that are effective to connect the heat generating portion to the power source. 9. The system of claim 8 that automatically turns off the heat generating portion about 2 to 5 minutes after the heat generating portion has reached a predetermined temperature. 10. The system of claim 9 which includes a voltage divider circuit and a thermistor. 11. The system of claim 10 which further comprises an operational amplifier and an N-channel MOSFET switch. 12. The system of claim 7 wherein the heating elements are a bank of fixed value resistors electronically arranged in series, parallel, or any combination thereof, and physically situated in two rows, one on both sides of the printed circuit board. 13. The system of claim 12 wherein the fixed value resistors have rated resistances from 1 to 10 ohms. 14. The system of claim 13 wherein the overall resistance of all the heating elements ranges from 1 to 10 ohms. 15. The system of claim 12 wherein the resistive heating elements are metal oxide thick film, chip resistors, the largest dimension of which is 2.0 mm or less. 16. The system of claim 12 wherein the resistive heating elements are discrete dots of a metal oxide thick film, provided as a silk screen deposit on the printed circuit board. 17. The system of claim 16 wherein the metal oxide thick film is comprised of ruthenium oxide (RuO2), and each dot is 2.0 mm or less. 18. The system of claim 7 wherein the resistive heating elements are embedded in a continuous, solid mass of a heat transfer material. 19. The system of claim 18 wherein the heat transfer material is one or more thermally conductive adhesives, one or more thermally conductive encapsulating epoxies or a combination of these. 20. The system of claim 2 further comprising an on-off mechanism that has at least two positions, in at least one of the positions the mechanism effects electrical contact between the heat generating portion and the power source, and in at least one of the positions the mechanism interrupts electrical contact between the heat generating portion and the power source, wherein the mechanism is accessible from the outside of the dispenser, and can be engaged, either directly or indirectly, by a user. 21. The system of claim 20 wherein the power source has a terminal, that may alternately occupy at least one “on” position and at least one “off” position, according to the positioning of the on-off mechanism. 22. The system of claim 21 wherein the terminal directly contacts a conductive element on the printed circuit board, when the terminal is on the “on” position. 23. The system of claim 21, wherein the power source is rechargeable. 24. The system of claim 21, wherein the power source is replaceable through a removable cap in the handle. 25. The system of claim 2 wherein a portion of the exterior surface of the reservoir is fashioned from a thermochromic material, such that the thermochromic material changes color within 10 seconds of the product in the chamber reaching a product application temperature. 26. The system of claim 1 wherein the reservoir holds a product comprising less than 10% water. 27. An outer package that includes a set comprising: a reusable second subassembly that comprises: a handle,a power source located in the handle;an electric circuit housing that is opened at an upper end and a lower end, that is adapted to detachably connect to an elongated neck;an electric heating circuit, that passes through the electric circuit housing, such that a heat generating portion of the heating circuit emerges from the lower end of the housing into the applicator head; andone or more disposable first subassemblies, each comprising: a reservoir that holds a product,an elongated neck that is connected to the reservoir in a detachable manner, anda hollow applicator head that depends from the elongated neck into the reservoir;wherein a portion of the applicator head seals off the product in the reservoir from the ambient atmosphere; andwherein all the reservoirs do not contain the same product. 28. The method of using a system for sampling a heated product comprising the steps of: providing a first subassembly that comprises: a reservoir that holds a product,an elongated neck that is connected to the reservoir in a detachable manner, anda hollow applicator head having a working surface that depends from the elongated neck into the reservoir;wherein a portion of the applicator head seals off the product in the reservoir from the ambient atmosphere;providing a second subassembly physically separate from the first subassembly, comprising: a handle,a power source located in the handle;an electric circuit housing that is opened at an upper and a lower end, andan electric heating circuit, that passes through the electric circuit housing, such that a heat generating portion of the heating circuit emerges from the lower end of the housing into the applicator head;inserting the heat generating portion into the applicator head by connecting the electric circuit housing to the elongated neck;breaking the connection between the reservoir and elongated neck;turning on the electric heating circuit;waiting a recommended amount of time;raising the applicator head out of the reservoir;transferring heated product to the hair or skin;turning off the heating circuit;separating the electric circuit housing from the elongated neck;removing the heat generating portion from the interior of the applicator head; anddisposing of the reservoir, applicator head, and elongated neck. 29. The method of claim 28 further comprising the step of raising the applicator head until the working surface is located in the wiper element, this step being performed after breaking the connection between the reservoir and elongated neck and before turning on the electric heating circuit.