| 摘要 |
A heat storing hair roller is provided having an outer plastic casing and an inner heat storage body filled with a heat storage material. Means, such as a plurality of radially directed protrusions, are provided between the plastic casing and the inner body in order to impart a radial stress on the plastic casing. This radial stress compensates for the greater thermal expansion rate of the plastic casing as compared to the inner heat storage body and maintains good thermal contact between the casing and the storage body despite the difference in thermal expansion rate.
|
