Back to results
US 4,538,630 AGranted
Microwave heated hair curler
OwnerGordon W. Hendersoninventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerGordon W. Hendersoninventor
Estimating the term…
A hair winder spool containing a lossy dielectric material and a heat sink material is rapidly heated in a microwave oven to hair curling and drying temperatures which are maintained for a sufficient length of time to dry and curl hair wound around the spool. The spool is a hollow molded low loss dielectric plastics material spindle with hair retaining protruberances and radially projecting end flanges. The interior of the spindle is filled with a heat sink material having a melting point temperature within the range desired for drying and curling the hair wound around the spindle and also having a high heat of fusion. The lossy dielectric material may be in the form of a core in the cylinder surrounded by the heat sink material, a lining or coating on the cylinder wall surrounding the heat sink material or a matrix embedded in the plastics material. The lossy dielectric material absorbs microwave energy converting it into thermal energy and heats the spool to hair drying and curling temperatures when placed in a microwave field for a very short time. The hair winders are conveniently packaged in a casing which is relatively insensitive to microwaves to be comfortably handled when removed from a microwave oven after the winders are heated to operating temperatures.
A self-contained, sealed, microwave heatable hair winder comprising a spool of a low loss dielectric material adapted to receive hair therearound and containing a lossy dielectric material in an amount to quickly heat the spool to operating hair curling temperatures when exposed to a microwave field.
A self-contained, sealed, hair curler for use with a microwave field comprising a dielectric plastics material hollow spool adapted to receive strands of hair therearound and containing a heat sink material and a lossy dielectric material effective to rapidly melt the heat sink material when the spool is exposed to microwaves.
A self-contained sealed, microwave heatable set of hair curlers comprising a tray, a plurality of hollow spools mounted in spaced relation on said tray, a cover for the spools on the tray, said tray and cover being inert to microwaves, said spools composed of low dielectric plastics material, a heat sink material sealed in said spools, and said spools containing a lossy dielectric material of high magnetic resonance effective to heat the spools to about 60.degree.-130.degree. C. when exposed to microwaves for not more than about 1 minute.
Dependencies are inferred from the claim text.