Circuit for electro mechanical tubing sealer

Details Circuit for electro mechanical tubing sealer Circuit for electro mechanical tubing sealer

1981-12-28

1983-06-28

Shoop, William M.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323349, 219 1077, 219 1081, H05B 904, B32B 1902, G05F 144

Patent

active

043908322

ABSTRACT:
A pair of jaws moveable with respect to one another whether mounted in a hand held sealer or desk mounted sealer, compresses, heats, elongates, spreads and welds liquid filled tubing placed therebetween. Variants of the pair of jaws provide means for serially or simultaneously segmenting the tubing into a plurality of sealed compartments. The pair of jaws are electrically connected to a source of RF energy as the plates of a variable capacitor in an RF resonant circuit. The flow of RF energy across the pair of jaws, which energy heats the tubing and, in conjunction with mechanical pressure, makes the weld, is a function of timing and of the spacing between the jaws which spacing affects the degree of resonance of the RF resonant circuit. Simultaneous with the heating of the tubing, the configuration of the pair of jaws compresses the tubing placed therebetween and focuses the RF energy in a narrow swath across the tubing while simultaneously elongating and spreading the tubing at the swath to obtain a leak free weld, which weld is configured to provide for separation of the sealed compartments without tearing or rupturing the compartments.

REFERENCES:
patent: 3541420 (1970-11-01), Rees
patent: 3562668 (1971-02-01), Bartlett et al.
patent: 3914679 (1975-10-01), Sullivan
patent: 4013860 (1977-03-01), Hosterman et al.
patent: 4186292 (1980-01-01), Acker

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