B - Operations – Transporting – 43 – L
Patent
B - Operations, Transporting
43
L
B43L 5/02 (2006.01) B42F 1/00 (2006.01) B42F 9/00 (2006.01)
Patent
CA 2639424
Improvements in the instruments for drawing lines using grooves providing the presentation of lines that may be drawn by placing a sheet of paper over the presentation and engaging the sheet of paper with the point of a writing tool with sufficient force to press the engaged part of the paper into a selected groove and then moving the writing tool point within the line, depositing pencil lead or ink from the end of the writing tool on the paper that is pressed into the selected groove to form a line on the paper. The improvements include the provision of registration marks on a clipboard which has the presentation of grooves for lines to be drawn on the upper side of the clipboard, the registration marks acting as guidelines for the precise placement of the sheet of paper on which lines are to be drawn and its retention in that placement by a clip attached to the end of the clipboard and engaging the end of the sheet of paper for such retention. This precise placement of the sheet of paper allows a sheet of paper that has had one or more lines drawn on it in the manner noted above to be removed and later replaced on the clipboard in precisely the same location as it had when the line or lines were earlier drawn on it, with the result that any additional lines to be drawn will be in perfect relation to the lines earlier drawn, and the later drawings and the earlier drawings appear to have been made just as if the sheet of paper had not been removed between such drawings. Various shapes of such marks may be employed. Another major improvement is the provision of a turntable as a part of the upper surface of the clipboard, with the presentation of the array of grooves being in the upper surface of the turntable, and the turntable may be rotated under the sheet of paper to allow the drawing of lines at different angles to each other. The amount of rotation of the turntable is limited to a desired amount of arcuate movement, within ranges of 90°, 180°, 270°, or 360°. Another improvement is the ability to use different turntables having different types of arrays of grooves which are easily substituted as desired, not requiring completely different clipboard assemblies.
Hachey Daniel Louis
Johnson Ryan Loron
Gowling Lafleur Henderson Llp
Hachey Daniel Louis
Johnson Ryan Loron
LandOfFree
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