Geometrical instruments – Straightedge type – Plural straightedges nonadjustably fixed at right angles
Patent
1994-08-23
1995-10-24
Wirthlin, Alvin
Geometrical instruments
Straightedge type
Plural straightedges nonadjustably fixed at right angles
33427, 33446, 33 323, 33 42, B43L 702, B26D 701
Patent
active
054599377
ABSTRACT:
A mat board cutting guide for use in cutting mat board for flamed pictures, for example, is disclosed. The cutting guide includes an elongated straight edge having a top and a bottom surface, a first and a second end, and a first and a second edge. The first and the second edge are parallel to each other and extending along the entire length of the straight edge. The cutting guide also includes a squaring head having a thickness substantially equal to the thickness of a standard single mat board, approximately 1/16 of an inch. The squaring edge is attached to the bottom surface of the straight edge at the first end of the straight edge. The squaring head includes a squaring edge adapted to engage a first edge of a piece of mat board when the bottom surface of the straight edge is placed on the piece of mat board. The squaring head is attached to the straight edge such that the squaring edge of the squaring head is perpendicular to the first and second edge of the straight edge. Several additional features of and attachments for the mat board cutting guide are also disclosed.
REFERENCES:
patent: 1648266 (1927-11-01), Grass
patent: 3086291 (1963-04-01), Harrison
patent: 3343266 (1967-09-01), Dolgorukov
patent: 4825559 (1989-05-01), Santos
patent: 5038487 (1991-08-01), Johnson
patent: 5309642 (1994-05-01), McGinnis
Albin Michael T.
Albin Stephen D.
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