Importance

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Abstract

A dual actuator cylinder assembly includes a cylinder body defining first and second axially aligned and separated internal cavities, which extend along aligned longitudinal axes. A first piston is movably mounted in the first internal cavity for movement along the longitudinal axis of the first internal cavity, and a second piston is movably mounted in the second internal cavity for movement along the longitudinal axis of the second internal cavity. A first actuator rod has an inner end interconnected with the first piston and an outer end located exteriorly of the cylinder body, and a second actuator rod has an inner end interconnected with the second piston and an outer end located exteriorly of the cylinder body. Movement of the first piston within the first internal cavity and movement of the second piston within the second internal cavity causes movement of the first and second actuator rods, respectively, in an axial direction along the longitudinal axes of the first and second internal cavities. The cylinder assembly may be incorporated in a vacuum packaging head that includes a seal member and a knife member. The outer end of the first actuator rod is interconnected with the seal member for moving the seal member between an operative sealing position and a retracted position, and the outer end of the second actuator rod is interconnected with the knife member for moving the knife member between an operative extended position and an inoperative retracted position.

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First Claim