| 摘要 |
A writing instrument such as a pen having a nib and a shaft for hand-held use. The shaft is formed with three elongated concave indentations in a generally equilateral triangular configuration with rounded vertices and at least one concave side as seen in cross section in the region normally grasped which form sockets to receive the thumb, index finger and middle finger respectively so as to provide a firm, comfortable and relaxed grasp ensuring complete control of the instrument and virtually eliminating writing tension. The nib is adjustable positionable relative to the shaft axis to provide a nib edge alignment at an angle to the pen's horizontal axis as defined by the three concave indentations, thus ensuring an optimum angle of contact between the nib and a writing surface, regardless of whether the pen is used right or left-handed, for producing attractive pleasing writing. Interchangeable nibs containing their own soluble marking medium in a nib unit may be provided for a shaft which carries solvent to be fed to the nib unit through a dialysis membrane. This pen is advantageous for use by both adults and children and can be used with any of a number of writing systems as taught to children in various schools. It is found that children's hands become relaxed in using this writing instrument and their writing skills advance more rapidly than when using conventional equipment.
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