This is a new use for the microwave. The magnetron produces a beam of microwaves that produces heat from moisture in hair. When used in a hair appliance the microwave beams heat the moisture in the hair causing a long lasting or permanent curling or straightening effect without the use of harsh chemicals. To protect the patron whose hair is being styled from the microwave radiation, shields are built into the appliance and the appliance will not operate unless the shield is in place guarding the patron from the microwave.
The shields are made from a ferrite or microwave absorbing material. This can include, but is not limited to the clear glass or plastic material in the door of a microwave oven.
The ferrite substance surrounds the magnetron except for where the microwave energy emanates. The magnetron may have microwave safe glass or plastic where the microwave radiation emanates. The glass or plastic casing or styling tool can be either smooth or it may have built in combs to aid straightening or curling hair. Ventilation is built into the casing to allow steam from the hair to escape without burning the patron's skin. An absorbent material may also be attached to the appliance to prevent steam from burning the patron.
A sensor can be used to monitor and control temperature and moisture in the patron's hair.
The magnetron can be either in the styling appliance tool or it can be in a base unit and the microwave energy can be delivered to the styling tool via a flexible microwave antenna. The microwave antenna is covered in a ferrite or microwave absorbing material to protect the people using it.
If the magnetron is too heavy or awkward to be used in a styling tool it can be attached to a floor stand or separate base unit for support.
The magnetron may use a fan, lens or other device to distribute microwave energy to a confined space.
The magnetron may use a control to regulate energy or temperature.
The magnetron may use a timer.
A soft flexible, malleable ferrite or microwaveable material may be used between appliance and scalp to absorb microwave energy.