Cutlery – Cutting tools – With guard and/or guide
Patent
1982-08-31
1985-01-29
Meister, James M.
Cutlery
Cutting tools
With guard and/or guide
30287, 30288, 145 20, B26B 2900
Patent
active
044956975
ABSTRACT:
A plasterboard trimming tool includes a main support element that consists of two parallel arms interconnected by a web and having lateral guiding surfaces which face one another and confine the marginal portion of the plasterboard between themselves in operation. A transverse guiding surface is provided on the web itself and/or an auxiliary support element which is selectively mountable on the web. A pair of cutting blades is mounted in respective holders at the same distance from the transverse guiding surface, the cutting blades having respective cutting edges which partially penetrate into the plasterboard to form continuous straight scoring cuts therein across the plasterboard from one another. The position of the auxiliary support element on the web can be reversed. The auxiliary support element has elongated sections of different thicknesses extending along the web, so that the distance of the scoring cuts from the edge face can be changed by reversing the position of the auxiliary support element. The auxiliary support element has a wedge-shaped leveling zone which levels the edge face of the plasterboard after the marginal portion of the same has been broken away along the scoring cuts. The auxiliary support element is of a flexible material and has an abutment section which is rigid with one of the elongated sections and prevents removal of the auxiliary support element from the web unless the one elongated section is deflected.
REFERENCES:
patent: 820639 (1906-05-01), Gabrielson
patent: 1878410 (1932-09-01), Lyon
patent: 2529210 (1950-11-01), Butler
patent: 2641834 (1953-06-01), Bobrowski et al.
patent: 3791014 (1974-02-01), Perna
Meister James M.
Watts Douglas D.
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