An oscillating sealing wire for high speed sealing of thermoplastic film. The sealing wire curved in the shape of a bow rocks back and forth across the moving surface of a thermoplastic film so the wire continuously presents a hot surface to the film. The film removes heat from the wire surface which touches the film. The oscillating wire continuously presents a new hot surface to the film to allow high speed movement of the film and still obtain a good seal.
申请公布号
DE3920905(A1)
申请公布日期
1990.01.25
申请号
DE19893920905
申请日期
1989.06.26
申请人
FMC CORP., CHICAGO, ILL., US
发明人
HEELER, DAVID E., GREEN BAY, WIS., US;PAMPERIN, JOHN M., ONEIDA, WIS., US