Massachusetts Institute of Technology

The Gillette Company

Elizabeth C Leonard

Jill Marie Shurtleff

Lewis Erwin

A safety razor has a thin flexible metal foil member with a plurality of apertures, and an edge of each aperture is sharpened to define a shaving edge. The foil member is disposed on support surface structure and thin, flexible protective sheet structure with a skin-engaging surface extends about the perimeter of the metal foil member and is secured in overlying relation to the support surface and to the foil member with the apertures of the foil member exposed in shaving relation immediately adjacent and surrounded by the skin engaging surface of the protective sheet structure.

Safety razor

A process for etching polytetrafluoroethylene (PTFE) is disclosed herein which comprises defluorinating the surface layer of PTFE. The process includes exposing a sample of PTFE to the vapors of an alkali metal such that a layer of the fluoride of the alkali metal is formed on the surface of the PTFE sample and removing the fluoride of the alkali metal from the surface of the PTFE sample.

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Cambridge, MA, United States of America

Elizabeth C Leonard