| 摘要 |
A BALLPOINT PEN NIB (2) HOUSING THE BALL (3) AND HAVING A STEM (6), AT LEAST ONE PART OF WHICH IS INSERTED COAXIALLY INTO A HOLE (5) IN THE LOWER END (4F) OF A HOLLOW BARREL (4) FORMING PART OF THE BALLPOINT PEN (1). ON THE OUTER SURFACE OF THE AT LEAST ONE PART OF THE STEM ARE FORMED ONE OR MORE FLUTES (7i) THAT EXTEND PARALLEL TO THE LONGITUDINAL AXIS (Z-Z) OF THE STEM (6) FOR A LENGTH (L) EQUAL TO OR GREATER THAN THE AXIAL LENGTH (H) OF THE HOLE (5) IN SUCH A WAY THAT THE OPPOSITE ENDS (D, E) OF THE ABOVEMENTIONED FLUTES (7i) ARE OUTSIDE OF IT AND ON OPPOSITE SIDES WITH RESPECT TO IT.FIG.1
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