Safety razor with filament guard
View Patent ↗A razor cartridge is provided with a skin engaging structure at the cap and/or guard surface of the razor cartridge. The skin engaging structure has an array of closely spaced elongated protrusions integrally formed with a substrate. In use, the protrusions produce a pleasant tactile sensation tending to reduce shaving discomfort. The protrusions are formed by closely packed molded flexible filaments that can be less than 0.25 mm wide and have spacing between adjacent protrusions less than 0.2 mm. The protrusions can have a density greater than 5 protrusions per mm 2 . The skin engaging structure can be molded from e.g. an olefin polymer. The substrate can be integrally formed with a housing of the razor cartridge.
1. A skin engaging structure for a razor cartridge comprising:
a plurality of elongated filament-like protrusions comprising a non-elastomeric thermoplastic polymer, the protrusions extending from a substrate integrally formed with the protrusions;
wherein the protrusions have a width less than 0.25 mm defined at their respective roots and a spacing between adjacent protrusions less than 0.2 mm.
2. The skin engaging structure of claim 1 , wherein the spacing between adjacent protrusions is about 0.15 mm.
3. The skin engaging structure of claim 1 , wherein the thermoplastic polymer is a polyolefin.
4. The skin engaging structure of claim 1 , wherein a transverse cross-section of any one protrusion is one of circular, oval and polygonal.
5. The skin engaging structure of claim 1 , wherein any one protrusion has substantially parallel sides.
6. The skin engaging structure of claim 1 , wherein any one protrusion is tapered.
7. The skin engaging structure of claim 1 , wherein any one protrusion has stepped sides.
8. The skin engaging structure of claim 1 , wherein protrusions are arranged in a plurality of parallel rows.
9. The skin engaging structure of claim 1 , wherein the protrusions are randomly distributed.
10. The skin engaging structure of claim 1 , wherein the protrusions have a density greater than 5 protrusions per mm 2 .