| 摘要 |
A casing for a chalk line dispenser comprises a pair of casing elements which interfit and define a chamber for storing chalk. The casing elements have end walls and sidewalls extending about the periphery thereof with interfitting surface portions along the outer ends thereof. The interfitting surface portion of one of the casing elements has a groove in the end surface of the sidewall extending about the periphery thereof and intermediate its width to provide resiliently deflectable depending wall sections. The interfitting surface portion on the other of the casing elements has a tongue extending about its periphery which seats in the groove and is of greater width than the groove to deflect the wall sections, so that the tongue is firmly gripped by the resiliently deflectable wall sections to provide a seal therebetween.
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