Patent ID: 7469482
Filing Date: 2008-12-30
Classification: B44D

Abstract:
1. A tensioned chalk line apparatus, comprising: a chalk line comprising a multi-strand line, said chalk line having a relaxed configuration in which substantially no tensile force is applied to said chalk line and a tensed configuration in which a predetermined tensile force is applied to an end of said chalk line, said chalk line further having a length that is shorter in said relaxed configuration than in said tensed configuration; said chalk line further having a plurality of surface discontinuities spaced at predetermined intervals along a length of said chalk line; wherein at least one of said plurality of surface discontinuities comprises a thin layer of material having a surface repellant to a chalk material so that chalk is repelled by said surface discontinuities and is selectively adhered to portions of said chalk line located between adjacent surface discontinuities to provide a chalk line capable of producing a multiplicity of aligned, accurately spaced chalk marks on a surface in said tensed configuration.