Invention Grant
US3813846A Method and apparatus for sealing thermoplastic covers to trays 失效
将热塑性树脂密封在托盘上的方法和装置

Method and apparatus for sealing thermoplastic covers to trays
Abstract:
Method and apparatus for sealing thermoplastic covers to product containing trays; for example in the embodiment disclosed for converting bulk butter and the like into individual service patties and for sealing each pat in a totally enclosed sanitary server.
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