A hair roller comprises a housing, an electrically-powered heater, an electrical energy source, and a controller. A section of hair can be wrapped onto the housing and, in use, the electrically-powered heater heats the hair roller to transfer heat to the hair wrapped around the housing. The electrical energy source is located within the housing and supplies electrical energy to the electrically-powered heater. The controller to controls the supply of electrical energy to the electrically-powered heater.

A hair roller comprises a housing, an electrically-powered heater, and an electrical connector. A section of hair can be wrapped around the housing and, in use, the electrically-powered heater heats the hair roller to transfer heat to the hair wrapped around the housing. The electrical connector is removably connectable to an electrical supply connector of a power applicator. In use, the electrical connector is to receive electrical energy from the electrical supply connector for delivery to the electrically-powered heater. The power applicator is configured so that the electrical energy can supplied to the electrical connector from the electrical supply connector when the hair is wrapped around the housing of the hair roller.

A hair roller comprises a housing, an electrically-powered heater, and an electrical connector. A section of hair can be wrapped around the housing and, in use, the electrically-powered heater heats the hair roller to transfer heat to the hair wrapped around the housing. The electrical connector is removably connectable to an electrical supply connector of a power applicator. In use, the electrical connector is to receive electrical energy from the electrical supply connector for delivery to the electrically-powered heater. The power applicator is configured so that the electrical energy can supplied to the electrical connector from the electrical supply connector when the hair is wrapped around the housing of the hair roller.

Aspects of hair styling instruments and methods for styling hair into waves and curls have been provided herein. In one embodiment, a system for styling hair includes one or more cases for receiving hair therein, the one or more cases including a base having at least a bottom, a center, and an outer annular wall; and a lid coupleable with the base; wherein the lid and the base form a volume for receiving the hair and wherein at least the bottom of the base and an indented upper portion of the lid each include a plurality of openings to allow flow of air and liquids through the case; and a stand, the stand comprising a base; a center piece extending upward from the base, the center piece configured to receive the one or more cases thereon; and a heating element.

Aspects of hair styling instruments and methods for styling hair into waves and curls have been provided herein. In one embodiment, a system for styling hair includes one or more cases for receiving hair therein, the one or more cases including a base having at least a bottom, a center, and an outer annular wall; and a lid coupleable with the base; wherein the lid and the base form a volume for receiving the hair and wherein at least the bottom of the base and an indented upper portion of the lid each include a plurality of openings to allow flow of air and liquids through the case; and a stand, the stand comprising a base; a center piece extending upward from the base, the center piece configured to receive the one or more cases thereon; and a heating element.

Heating units for heating hair rollers are provided, as well as rollers for use therewith. An exemplary heating unit includes a housing having a lid and a lower portion, with a first magnetic core disposed within the lower portion and a second magnetic core disposed within the lid. The first magnetic core includes two parallel legs, and a plurality of conductive windings wound around one of the two legs. When the housing is closed the first and second magnetic cores together form a square closed core. When energized, the windings generate a magnetic field within the square closed core that induces an electric current in a roller disposed around the second of the two legs. An exemplary roller for use with the heating unit comprises a conductive cylinder, such as aluminum, having a diameter of at least two inches and including bristles protruding perpendicular to the exterior surface.

Heating units for heating hair rollers are provided, as well as rollers for use therewith. An exemplary heating unit includes a housing having a lid and a lower portion, with a first magnetic core disposed within the lower portion and a second magnetic core disposed within the lid. The first magnetic core includes two parallel legs, and a plurality of conductive windings wound around one of the two legs. When the housing is closed the first and second magnetic cores together form a square closed core. When energized, the windings generate a magnetic field within the square closed core that induces an electric current in a roller disposed around the second of the two legs. An exemplary roller for use with the heating unit comprises a conductive cylinder, such as aluminum, having a diameter of at least two inches and including bristles protruding perpendicular to the exterior surface.