| 摘要 |
A chalk box for producing a chalk line without leakage of chalk dust from within. The chalk box has a chalk-filled chamber that houses a spool (42) and a flexible chalk line (60). The chalk line (60) extends outwardly around a guidepost and through a fibrous tube (54). The fibrous tube (54) snugly hugs the flexible line (60), preventing chalk dust from leaking through the tube (54). The chalk dust impregnating the flexible line (60) provides lubrication for its passage through the fibrous tube (54). The present invention also includes a built-in pencil sharpener (48) isolated from the chalk dust, for the convenience of the user.
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