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US 5,279,098 AGranted
Apparatus for and method of transverse sealing for a form-fill-seal packaging machine
AssigneeIshida Scales Mfg. Co., Ltd.
InventorMasao Fukuda
Life of this patent
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AssigneeIshida Scales Mfg. Co., Ltd.
InventorMasao Fukuda
Estimating the term…
A horizontal sealer for a vertical pillow type form-fill-seal packaging machine has a pair of horizontally elongated heater assemblies which are supported such that they remain horizontal as they individually rotate around mutually parallel axes. The distance between these axes are varied as the heater assemblies rotate around them such that the heater assemblies have generally D-shaped trajectories as they horizontally seal a tubularly formed thermoplastic flexible film material to make a bag. Mechanisms are provided whereby the heating surfaces of the assemblies remain oriented in the same direction, the pressure applied to the film material can be controlled and the bag can be squeezed before the horizontal sealing such that articles being packaged will settle inside the bag. A similarly structured vertical sealer may be provided to a horizontal pillow type packaging machine.
A transverse sealer for a form-fill-seal packaging machine with means for transporting a bag-forming film material along a film path, comprising:
A method of transverse sealing for a form-fill-seal packaging machine with means for transporting a bag-forming film material along a film path, a pair of elongated heater assemblies and a pair of heater-supporting members each rotatably supported around one of a pair of axes which are adapted to remain parallel to each other and extending transverse to said film path, each of said heater assemblies being rotatably supported by one of said heater-supporting members such that said heater assemblies remain parallel to said axes and on opposite sides of said film path;
Dependencies are inferred from the claim text.