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US 4,176,452 AGranted
Picture frame mat opening cutter
AssigneeFrameworks, LLC
InventorsRichard W. Duggins, James W. Rodgers
Life of this patent
Estimating the term…
Abstract
A versatile mat opening cutter is adapted for cutting circular and oval openings, rectangular openings and, with the aid of a template, special shaped openings. The cutter body mounts a retractable cable wound on a spring-loaded, rotatable spool, an adjustable cutting blade, and a template follower. Circles and ovals are cut utilizing the retractable cable and positioning pins on a working surface. Special shaped openings are cut by using a template and the template follower.
Claims14
A picture frame mat opening cutter comprising:
- (a) a cutter body adapted for being manually grasped and manipulated to form an opening in a picture frame mat, said cutter body having a flat bottom surface with a horizontal guide slot formed centrally therein and having an angularly disposed guide slot formed in said cutter body;
- (b) a blade support bar slidably mounted in said angularly disposed guide slot and providing a blade mounting surface thereon;
- (c) a mat opening cutter blade detachably mounted on said blade support bar surface for slidable movement therewith;
- (d) spring means mounted within said cutter body and operative on said blade support bar enabling said blade support bar and said blade mounted thereon to be constantly tensioned in a retracted blade direction;
- (e) means mounted on said cutter body and adapted to adjustably locate said blade support bar and said blade mounted thereon in a position appropriate to cutting a preselected mat opening;
- and
- (f) an elongated template guide bar movably mounted in said horizontal guide slot, said guide bar having an outwardly angled protrusion at its forward end from which a thin, flat guide vane extends rearwardly from the outer edge thereof to form a hook structure with said protrusion adapted to engage a template edge as a guide for forming a mat opening according to the shape of opening formed in said template.
4 more elements
A picture frame mat opening cutter comprising:
- (a) a cutter body adapted for being manually grasped and manipulated to form picture frame mat openings, said cutter body having a flat bottom surface with a horizontal guide slot formed centrally therein and having an angularly disposed guide slot formed in said cutter body;
- (b) a blade support bar movably mounted in said angularly disposed guide slot and providing a blade mounting surface thereon;
- (c) a mat opening cutter blade detachably mounted on said blade support bar surface for slidable movement therewith;
- (d) spring means mounted within said cutter body and operative on said blade support bar enabling said blade support bar and said blade mounted thereon to be constantly tensioned in a retracted blade direction;
- (e) means mounted on said cutter body and adapted to adjustably locate said blade support bar and said blade mounted thereon in a position appropriate to cutting a preselected mat opening;
- (f) a spring loaded spool member mounted in a lower portion of said cutter body and including a flexible retractable cable wound thereon with an outer end secured to said cutter body, said cable being adapted to be withdrawn from said cutter body forward of said mat opening cutter blade for encircling appropriate mat positioning pins to form circle, oval openings, and the like, in a selected picture frame mat;
- (g) means for locking said spool means in a selected position with said cable withdrawn a selected amount;
- and
- (h) an elongated template guide bar adjustably mounted in said horizontal guide slot, said guide bar having an outwardly angled protrusion at its forward end from which a thin, flat guide vane extends rearwardly from the outer edge thereof to form a hook structure with said protrusion adapted to engage a template edge as a guide for forming a mat opening according to the shape of opening formed in said template.
6 more elements
Dependencies are inferred from the claim text.