Package making – Progressively seamed cover web or web folds – With closing of web between package units
Reexamination Certificate
2007-12-11
2007-12-11
Harmon, Christopher (Department: 3721)
Package making
Progressively seamed cover web or web folds
With closing of web between package units
C053S451000, C053S550000, C053S574000
Reexamination Certificate
active
09996624
ABSTRACT:
A packaging machine moves its heater unit for longitudinal sealing of a tubularly formed film between a sealing position at which the heater unit contacts the film and a retracted position at which it is separated from the film. In addition to the mechanism for this motion, an air cylinder is provided for controlling the compressive force with which the heater unit at its sealing position compresses the film. A pressure controlling system regulates the air pressure supplied to the air cylinder. If the mechanism for moving the heater unit also employs another air cylinder, a higher pressure for moving the heater unit and a lower pressure for controlling its compressive force may be generated from a single air source and supplied to the two air cylinders by a switching mechanism. A single air cylinder with two air chambers may be used for the both functions. A motor is additionally provided for removing the heater unit and its support unit much farther away from the film to provide a large enough space for exchanging the former and/or the chute of the packaging machine.
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European Search Report, Application No. EP03026857, completed Feb. 24, 2004.
Fukuda Masao
Kubo Michihiro
Beyer & Weaver, LLP
Harmon Christopher
Ishida Co. Ltd.
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