发明授权
US4060443A Device for the heat-sealing of thermoplastic material or paper material coated with thermoplastics 失效
用热塑性材料或涂有热塑性塑料的纸材进行热封的装置

Device for the heat-sealing of thermoplastic material or paper material
coated with thermoplastics
摘要:
A device to heat seal at least two thermoplastic layers using heat generated by the dielectric loss from a high frequency generator.
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