(under subclass 11) Devices in which a portion of the back between spaced locations at which teeth are secured to the back has an angled or curved surface.
(1) Note. This expedient is often used to expedite cleaning of the kerf.
(2) Note. This structure is sometimes employed so that there will be no corners in the kerf such as would pull on the hair as the comb is used. Often the angle or arch surface will continue down the sides of adjoining teeth.
