Patent ID: 6148708
Filing Date: 2000-11-21
Classification: B26D,B41J,G07B,Y10T

Abstract:
A cutting device for cutting strip stock comprising:a housing provided with a pair of identical, laterally spaced bearing elements, each respective bearing element comprised of two slotted walls in spaced confronting relationship,and a respective ball bearing supported and movable in each of said respective slots, each slot being identical and vertically disposed in confronting relationship to the other of the respective bearing unit;a movable blade interposed between each pair of ball bearings, said movable blade defined by a pair of opposed sides, a pair of opposed lateral ends, and a top and a bottom end, wherein said bottom end comprises a cutting edge, each of said sides of said movable blade including a respective surface, wherein each respective opposed surface is in contact against a respective said ball bearing adjacent each lateral blade end, said movable blade including two laterally spaced openings extending between said opposed surfaces, each of said spaced openings disposed above said cutting edge an equal extent;a stationary blade fixed to said housing and having a cutting edge;a drive assembly for displacing said movable blade, said drive assembly connected to a drive unit attached to said movable blade,said drive assembly comprising a drive motor mounted within said housing, a worm connected to a shaft of said drive motor, a wormed wheel enmeshed with said worm, and a connecting rod connected to said wormed wheel, said connecting rod having input and output ends and an angled opening formed in said rod at said input end, said wormed wheel including a driving pin inserted in said angled opening, of said connecting rod,said drive unit comprising a first and second output crank, each of said output cranks having respective input and output ends, said input end of said first crank connected by a drive pin with the output end of said connecting rod, said one drive pin connected to said movable blade through one of said laterally spaced openings in said movable blade so as to form a first support and drive point of said movable blade, said output end of said first output crank provided with toothing, said input end of said second output crank provided with toothing complementary to said toothing on said first output crank and interlocked therewith, said output end of said second output crank connected by another drive pin to said movable blade through insertion of said other drive pin through the other of said laterally spaced openings in said movable blade so as to form a second support and drive point of said movable blade, said movable blade being displaceable at each of said drive points upon movement of each of said driving pins by said drive assembly,wherein said cutting edge of said movable blade continuously contacts along said cutting edge of said stationary blade so that a third support point of said movable blade is maintained and wherein said movable blade is adjustable according to a length of an operating stroke of said connecting rod, said operating stroke length determined by said angled opening provided in said connecting rod, wherein said angled opening is respectively comprised of two vertically oriented cutouts arranged side-by-side, one of said cutouts relatively of longer extent than the other cutout.