A hair styling appliance is described having a first electrode and a second electrode, and a drive unit for applying alternating voltages to the electrodes to heat dielectrically hair located between the electrodes. The drive unit applies a first alternating voltage to the first electrode and a second alternating voltage to the second electrode, and the second alternating voltage is phase shifted relative to the first alternating voltage.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

Heating systems utilizing radio frequency (RF) energy and methods for using the same to rapidly and uniformly heat packaged articles moving through the system on one or more convey lines. These systems may be useful for a variety of processes, including the pasteurization or sterilization of packaged foodstuffs.

A hair styling appliance is described having a pair of electrodes, and a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair located between the electrodes, wherein the frequency of the alternating voltage is constant.

A hair styling appliance is described having a pair of electrodes, and a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair located between the electrodes, wherein the frequency of the alternating voltage is constant.

A hair styling appliance is described having a pair of electrodes, and a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair located between the electrodes. The drive unit includes mutually coupled inductors having a coupling coefficient that varies in response to changes in a spacing of the electrodes.

A hair styling appliance is described having a pair of electrodes, and a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair located between the electrodes. The drive unit includes mutually coupled inductors having a coupling coefficient that varies in response to changes in a spacing of the electrodes.

A hair styling appliance is described having a plurality of projections and one or more channels, each channel being located between adjacent projections. Each of the projections includes an electrode and the appliance includes a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair within the channels.

A hair styling appliance is described having a plurality of projections and one or more channels, each channel being located between adjacent projections. Each of the projections includes an electrode and the appliance includes a drive unit for applying an alternating voltage to the electrodes to heat dielectrically hair within the channels.

A hair styling appliance is described having electrodes and a drive unit. The drive unit is operable to determine a presence of hair between the electrodes. In response to determining that hair is present, the drive unit applies an alternating voltage to the electrodes to heat the hair dielectrically.