Patent ID: 6837410

Claim:
An automatic picture tube cutting system comprising: (a) a frame; (b) a transporting unit coupled to a lower portion of the frame, said transporting unit including a transporting tray for supporting a picture tube, said transporting unit being operable to transport the picture tube; (c) a moving-up-and-down base coupled to said frame, said moving-up-and-down base being operable to vertically adjust in position a picture tube received from said transporting unit; and, (d) a positioning and cutting device coupled to said frame, said positioning and cutting device including: (1) first and second pairs of rotatable threaded rods, said first pair of threaded rods being interlinked for mutually responsive rotation, said second pair of threaded rods being interlinked for mutually responsive rotation, each of said threaded rods having a pair of opposed end sections threaded in a complementary manner; (2) a plurality of guide blocks, each threadedly engaging one said end section of one said threaded rod; (3) a plurality of position rods each extending between a pair of said guide blocks to collectively define a rectangularly crossed configuration; (4) a plurality of micro switches each coupled to an intermediate portion of a respective one of said position rods; and, (5) a plurality of heating filaments each extending in resilient manner substantially between a pair of said guide blocks to be disposed within said rectangularly crossed configuration defined by said position rods, said filaments being operable to substantially circumscribe and heat a portion of the picture tube to be cut.