necessarily to scale instead emphasis has been placed upon illustrating the principles of the invention in addition in the embodiments depicted herein like reference numerals in the various drawings refer to identical or near identical structural elements moreover the terms u201c substantially or approximately u201d as used herein may be applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related for example a linear marking apparatus may include more or fewer functional elements may include more or fewer level components or spools or may include components which are placed in locations on a linear marking apparatus which are different than the exemplary embodiments shown fig1 a illustrates a sectional view of an exemplary non extendable embodiment of linear marking apparatus 100 which includes a housing 10 which in the embodiment shown is comprised of a square tubular body 10 in the embodiment shown housing 10 is aluminum but in other embodiments housing 10 may be made of wood plastic or other metals and may be machined molded stamped or extruded in the embodiment shown is a singularly constructed component but in other embodiments housing 10 may be constructed from multiple components in the embodiment shown housing 10 includes at least one internal channel 18 which may be hollow or partially hollow or contain apertures or recesses for depositing one or more marking.