Importance

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Abstract

A form-fill-seal packaging machine in which a packaging material (F) is sealed crosswise by bringing a pair of sealing jaws (41, 42) into contact with each other. The sealing jaws (41, 42) are caused to follow the packaging material along the packaging material transfer direction while they are kept in the same condition, to cause the sealing jaws to take contacting and following motions by means of a single drive source. The rotation of a motor (25) is converted into a linear reciprocating motion along the transfer route of the packaging material through a cam mechanism comprised of a circular cam plate (24) and an arm (33) and the converted reciprocating motion is transmitted to a block (30). Similarly, the rotation of the motor (25) is converted into a linear reciprocating motion in a direction intersecting the packaging material transfer route at right angles through vertically elongated cam plates (50, 50) and the converted reciprocating motion is transmitted to blocks (37, 38). Thus, by supporting these blocks (37, 38) by the block 30, it is possible to allow the sealing jaws (41, 42) to take elevating and contacting motions using the single motor (25).

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First Claim