Electric heating – Metal heating – For bonding with pressure
Reexamination Certificate
2007-10-16
2007-10-16
Kerns, Kevin P. (Department: 1725)
Electric heating
Metal heating
For bonding with pressure
C219S117100, C219S093000
Reexamination Certificate
active
11140682
ABSTRACT:
A welding assembly is provided for welding a fastener to an object such as a vehicle body panel. The assembly includes a weld gun having first and second electrodes movable relative to one another between an open position and a closed position. The first electrode includes a housing assembly. A pin is received in the housing assembly and is movable when in said closed position between a desired nut position, and upside down nut position, and a no nut position. An optical sensor has a terminal end space from the pin for direction light thereon. The terminal end of the sensor received reflected light from the pin. A sensor control system processes the reflected light into a signal corresponding to one of the desired nut, upside down nut, and no nut positions.
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Search Report PCT/CA02/00857; Filed Jun. 12, 2002.
Carlson & Gaskey & Olds
Doben Limited
Kerns Kevin P.
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