Geometrical instruments – Scriber – Straight-line
Reexamination Certificate
2010-07-01
2011-11-08
Bennett, Brad (Department: 2841)
Geometrical instruments
Scriber
Straight-line
C033S032100
Reexamination Certificate
active
08051573
ABSTRACT:
A user manipulated apparatus for producing straight construction lines on sheet material includes a linearly extensive frame with integrally formed handle and an expendable marking strip affixed to a bottom edge of the frame. A user positions the frame so that its ends are in registry with the endpoints of a desired construction line, with the marking strip contacting the surface of the sheet material. The user then linearly displaces the frame a short distance along its length so that the marking strip rubs along the surface of the sheet material and produces a visible construction line. The portion of the frame that supports the marking substance may be compliant to ensure that the marking substance fully engages the surface of the sheet material even when the sheet material has surface irregularities or is not perfectly planar.
REFERENCES:
patent: 1895754 (1933-01-01), Finkenwirth
patent: 2557699 (1951-06-01), Silver
patent: 2655728 (1953-10-01), Cook
patent: 2964848 (1960-12-01), Gonsalves
patent: 3475822 (1969-11-01), Lain
patent: 3626595 (1971-12-01), Hulen
patent: 4189844 (1980-02-01), Riggins, Sr.
patent: 5699622 (1997-12-01), Umbro
patent: 6944962 (2005-09-01), Tessel
patent: 2007/0240317 (2007-10-01), Nicholson
Bennett Brad
Navarre Mark A.
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