JAM RESISTANT CHALK REEL

Abstract

A chalk reel includes a housing defining a chalk chamber and an opening from the chalk chamber; a spool positioned within the chalk chamber; and a line wound on the spool and extending through the opening, the line having a width of dimension X. The spool comprises an axial hub and a sidewall. The sidewall comprises a plurality of apertures extending through the sidewall from a first face distal from the axial hub to a second face proximal to the axial hub. Each of the plurality of apertures having a maximum width of dimension Y. The dimension Y is less than or approximately equal to twice the dimension X.

Description

Claims

1. A chalk reel comprising: a housing defining a chalk chamber and an opening from the chalk chamber;a spool positioned within the chalk chamber; anda line wound on the spool and extending through the opening, the line having a width of dimension X;wherein the spool comprises an axial hub and a sidewall;wherein the sidewall comprises a plurality of apertures extending through the sidewall from a first face distal from the axial hub to a second face proximal to the axial hub;wherein each of the plurality of apertures having a maximum width of dimension Y;wherein the dimension Y is less than or approximately equal to twice dimension X.

2. The chalk reel of claim 1, wherein the dimension X is a compressed width of the line.

3. The chalk reel of claim 2, wherein the dimension X is approximately between 0.25 mm and 1.25 mm.

4. The chalk reel of claim 1, wherein the dimension X is approximately between 0.5 and 2.5 mm.

5. The chalk reel of claim 1, wherein the dimension Y of each of the plurality of apertures is greater than 0.015 mm.

6. The chalk reel of claim 1, wherein the plurality of apertures comprises greater than twenty apertures.

7. The chalk reel of claim 1, wherein the spool comprises a second sidewall opposite the axial hub from the first sidewall.

8. The chalk reel of claim 7, wherein the plurality of apertures is formed on both the first sidewall and the second sidewall.

9. The chalk reel of claim 8 wherein the plurality of apertures comprises greater than forty apertures.

10. The chalk reel of claim 1 wherein the line is formed from one or more of nylon, polyester, and cotton.

11. The chalk reel of claim 1, wherein the spool is formed from one or more of metal and plastic.

12. The chalk reel of claim 1, wherein the sidewall comprises a mesh or perforated material defining the apertures.

13. The chalk reel of claim 12, wherein the sidewall is defined by the mesh or perforated material.

14. The chalk reel of claim 13, further comprising reinforcements to support the mesh or perforated material.

15. The chalk reel of claim 1, wherein the dimension Y is less than approximately twice the dimension X.