Cutting – With work immobilizer – Means to clamp work
Patent
1980-04-30
1983-11-08
Schran, D. R.
Cutting
With work immobilizer
Means to clamp work
83522, 83614, B26D 702, B26D 726, B26D 510
Patent
active
044135424
ABSTRACT:
A cutter for picture frame mats is provided herein. It includes a rectangular cutter base having a planar mat-supporting surface, a hinged frame, a cutter head assembly mounted on a guide rod on the hinged frame, and a stop on the guide frame. The inventive concept is embodied in a novel clamping frame including a pair of spaced-apart, parallel, transverse, lateral hinge bars, each being secured by an associated hinge adjacent its respective rear end. A longitudinally extending handle interconnects the respective forward ends of the transverse lateral hinge bars. A longitudinally extending intermediately transversely positioned cutter head guide bar assembly is disposed between the hinge bars. The cutter head guide bar assembly includes a guide plate having a lower surface which, in use, lies flush with the picture frame mat which is resting on the mat-supporting surface. A guide rod is secured to its upper surface, rotation in, and with respect to, the transverse, lateral hinge bars, at a point intermediate the forward end and the rearward end of the transverse, lateral hinge bars. Each such hinge has a first stop member cooperating with an associated hinge bar to limit rotation of the cutter head guide bar assembly and the clamping frame to an upright position at a selected angle within the range of from about 92.degree.-96.degree. to the plane of the cutter base. Each hinge also has a second stop member cooperating with an associated hinge bar to limit rotation of the cutter head guide bar assembly and the clamping frame to a lowered position at which the bottom surface of the guide plate is flush with, but is not resting with any significant weight upon, the picture frame mat which is resting on the mat-supporting surface. The clamping frame is thus selectively deformable by exerting downward pressure on the cutter head guide assembly thereby to urge the guide plate into gripping engagement with the picture frame mat. A mat guide system is also mounted on the cutter base to enable duplication and repeating of the same cutting procedures through a series of three steps in a duplicator block, repeater block and groover block mounted on a wide rigid central bar.
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