ELECTRICALLY HEATED HAIR ROLLER WITH SELF-CONTAINED POWER SOURCE
First Claim
1. A hair roller comprising a hollow tube about which hair may be wound, an electrically insulated resistive heating element extending about the wall of at least a portion of said tube, said tube including means for supporting a battery in a location within the hollow interior thereof with at least a portion of the battery positioned in said portion of the tube provided with said heating element and including a heat insulating zone substantially coextensive with said portion of the battery and at least one sixteenth inch thick, said zone having a thermal conductivity no greater than 0.003 cal./(sec.)(cm.2)(*C./cm.) and being disposed between said heating element and said battery location, and means for electrically connecting said heating element to a battery so supported.
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Accused Products
Abstract
A hollow tubular hair roller about which hair may be wound incorporates a resistive heating element in its tubular wall structure. A battery, which may be rechargeable, is supported within the hollow interior of the roller and connected to the heating element. A zone of heat insulation at least one-sixteenth inch deep and having a thermal conductivity less than 0.003 cal./(sec.) (cm.2) (* C./cm.) is provided between the resistive heating element and the battery. The zone of insulation may be a tube of solid or foamed synthetic polymer or an airgap through which battery supporting nibs extend.
26 Citations
8 Claims
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1. A hair roller comprising a hollow tube about which hair may be wound, an electrically insulated resistive heating element extending about the wall of at least a portion of said tube, said tube including means for supporting a battery in a location within the hollow interior thereof with at least a portion of the battery positioned in said portion of the tube provided with said heating element and including a heat insulating zone substantially coextensive with said portion of the battery and at least one sixteenth inch thick, said zone having a thermal conductivity no greater than 0.003 cal./(sec.)(cm.2)(*C./cm.) and being disposed between said heating element and said battery location, and means for electrically connecting said heating element to a battery so supported.
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2. A hair roller as claimed in claim 1 in which said heating element is disposed in helical form about said tube and extends the full length of said battery location.
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3. A hair roller as claimed in claim 1 in which said supporting means is arranged to maintain said battery in spaced relation to the wall of the tube, said space between the battery and the wall forming at least a portion of said heat insulating zone.
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4. A hair roller as claimed in claim 1 in which the wall of said tube comprises a thickness inwardly of said heating element of at least one sixteenth inch, composed of material having a thermal conductivity less than 0.003 cal./(sec.)(cm.2)(*C./cm.) forming said heat insulating zone.
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5. A hair roller as claimed in claim 3 in which said heating element extends the full length of said battery location.
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6. A hair roller as claimed in claim 5 in which said heating element extends the full length of said battery location.
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7. A hair roller as claimed in claim 1 in whiCh said battery is rechargeable, said electrical connecting means is normally closed and is actuatable to open position, and said roller includes an element for connecting said battery to a source of recharging power and for simultaneously actuating said electrical connecting means to open position to disconnect said heating element from said battery.
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8. A hair roller as claimed in claim 7 including an additional electrically nonconductive element interchangeable with said connecting element for actuating said electrical connecting means to open position to disconnect said heating element from said battery without connecting said battery to a source of recharging power.
Specification