Metal fusion bonding – With control means responsive to sensed condition – Work-responsive
Patent
1991-08-07
1992-12-08
Seidel, Richard K.
Metal fusion bonding
With control means responsive to sensed condition
Work-responsive
228 494, 156574, 156391, B23K 114, B30B 304, B30B 1534
Patent
active
051690527
ABSTRACT:
An apparatus for welding overlapping edges of plastic sheeting comprises a wedge-shaped heater assembly having spaced first and second heating surfaces converging to a wedge-tip. A heating element is operably associated with each of the surfaces for causing heating thereof. A sensor is operably associated with each of the surfaces for monitoring the temperature of sheeting passing therealong. A control system is operably associated with each of the sensors and with each associated heating element for controlling oeration of each of the heating elements in response to the temperature monitored by the associated sensor. A drive system is proximate the wedge-tip for causing sheeting to be advanced over the surfaces and to be compressed together upon passing beyond the wedge-tip for thereby being welded together.
REFERENCES:
patent: 3624836 (1971-11-01), Rohdin
patent: 4146419 (1979-03-01), Neidhart
patent: 4769102 (1988-09-01), Neumuller et al.
patent: 4855004 (1989-08-01), Chitjian
patent: 4960478 (1990-10-01), Newkirk et al.
Berenato, III Joseph W.
Elpel Jeanne M.
Seidel Richard K.
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