Electric heating – Heating devices – Tool or instrument
Patent
1974-11-11
1976-12-28
Bartis, A.
Electric heating
Heating devices
Tool or instrument
30116, 30140, 83171, 219233, 219533, 225 935, H05B 100, B26D 710, B26F 312
Patent
active
040003957
ABSTRACT:
An apparatus for cutting arbitrary shapes in material, particularly in synthetic plastic foam material, is disclosed. The apparatus includes a bendable, shape-retaining, electrically conductive resitive wire which may be successively formed into any desired shape by selectively arranging either or both elements of a pair of independently movable wire positioning elements which are respectively attached to end portions of the resistive wire. The resistive wire is also connected to an electrical current source provided on said elements for heating the wire to a predetermined temperature which is sufficiently high so that the wire may cut the desired shape into the workpiece by heat. Securing portions are provided on the independently movable elements so that the latter may be secured together and form an interlocked assembly so that the resistive wire may be fixedly positioned into a loop, threby permitting identical shapes and circular patterns to be cut into a series of workpieces by mass-production techniques.
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Bartis A.
Striker Michael J.
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