초록 ▼

A chalk line apparatus comprising a holder for powdered chalk containing a rotatable reel, a flexible line wound on said reel, an exit opening for the line at one end of the holder, and an adjustable calibrated line-tensioning device in the holder between the reel and the exit opening for the line.

A chalk line apparatus comprising a holder for powdered chalk containing a rotatable reel, a flexible line wound on said reel, an exit opening for the line at one end of the holder, and an adjustable calibrated line-tensioning device in the holder between the reel and the exit opening for the line. The line has evenly spaced short segments of one diameter between the long segments of a different diameter. When the line is snapped, the chalk-covered short segments leave evenly spaced chalk marks which are visibly distinct from those left by the long segments of the line.

대표청구항 ▼

A chalk line apparatus comprising: a holder providing a compartment for holding powdered chalk and having a small line exit opening at one end; a reel rotatably mounted in said holder; a flexible line wound on said reel and extending from said reel through said line exit opening to the outside of th

A chalk line apparatus comprising: a holder providing a compartment for holding powdered chalk and having a small line exit opening at one end; a reel rotatably mounted in said holder; a flexible line wound on said reel and extending from said reel through said line exit opening to the outside of the holder, said line having surface discontinuities at predetermined intervals along its length which produce visible discontinuities in the chalk marking produced by said line outside the holder; a line guide in said holder compartment engaging said flexible line between said reel and said line exit opening; a support for said line guide movably mounted in said holder and positioning said line guide within a range of positions throughout which the line guide deflects the line from a straight path between said reel and said line exit opening; and spring means acting between said holder and said support to bias the support to oppose the withdrawal of the line from the holder by positioning said line guide to deflect the line from a straight path between said reel and said line exit opening.