| 摘要 |
A SAFETY RAZOR BLADE UNITS HAS A GUARD (2), A CAP (3), AND THREE PARALLEL BLADES (11,12,13) MOUNTED BETWEEN THE GUARD AND CAP, AT LEAST ONE OF THE BLADES, GUARD AND CAP BEING NOVABLE FROM A NON-SHAVING POSITION TO MODIFY A BLADE EXPOSURE DIMENSION, AND TO ATTAIN A MODIFIED BLADE GEOMETRY IN WHICH THE EXPOSURE OF THE FIRST BLADE (11) IS NOT GREATER THAN ZERO AND THE EXPOSURE OF THE THIRD BLADE (13) IS NOT LESS THAN ZERO. AT LEAST ONE OF THE CAP (2) AND GUARD (3) CAN BE MOVABLE AGAINST THE FORCE OF A SPRING (20 OR 21) FROM A NON-SHAVING POSITION IN WHICH ALL THE BLADES BETWEEN THE GUARD AND CAP HAVE THEIR EDGES DISPOSED BELOW A PLANE TANGENTIAL TO THE SKIN CONTACTING SURFACES OF THE BLADE AND CAP. THE BLADES CAN BE INDEPENDENTLY SPRUNG OR CARRIED FOR MOVEMENT IN UNISON ON A CARRIER PIVOTALLY MOUNTED IN A FRAME OF THE BLADE UNIT. (FIG. 2)
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