Chalk line apparatus

Details Chalk line apparatus Chalk line apparatus

1986-05-30

1987-04-28

Little, Willis

Geometrical instruments

Straightedge type

Cord type

33138, 33613, B44D 338

Patent

active

046602917

ABSTRACT:
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.

REFERENCES:
patent: 695145 (1902-03-01), Cook
patent: 997831 (1911-07-01), Kiso
patent: 2398805 (1946-04-01), Pomeroy
patent: 3475822 (1969-11-01), DeLain
patent: 3721009 (1973-03-01), Lucich
patent: 4143462 (1979-03-01), Gertz
patent: 4149320 (1979-04-01), Troyer et al.
patent: 4152836 (1979-05-01), Rodrique
patent: 4367590 (1983-01-01), Winter et al.

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