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US 4,517,790 AGranted
Apparatus and method for ultrasonic sealing of packages
AssigneeFrito-Lay, Inc.
InventorWilliam D. Kreager
Life of this patent
Estimating the term…
Abstract
An apparatus and method for continuous rotary ultrasonic sealing of form and fill machines to produce packages utilizes a rotary anvil and cutter knife and an ultrasonic horn having adjustable simulated rotary motion movable in synchronism with the anvil for providing an end seal on packages.
Claims15
Apparatus for making an ultrasonic end seal on a package produced in connection with the form and fill machine, the apparatus comprising:
- a movable ultrasonic horn, mounting means with an adjustable arcuate movement for moving an adjustable said horn into juxtaposition with one side of the package, a movable ultrasonic anvil mounted for rotary movement, means for moving the anvil into juxtaposition with the other side of the package, means for synchronizing the movement of the ultrasonic horn and anvil so that they are simultaneously positioned on opposite sides of the package to accomplish ultrasonic sealing while the package is moving, means for supplying power to the ultrasonic horn when the horn and the anvil are on opposite sides of the package with the package therebetween, and said mounting means for the ultrasonic horn comprises a crank eccentric mounting means for driving the horn through a movable and adjustable pivot point so that by change of position of the pivot point the residence time in the area of the seal may be increased or decreased.
Apparatus for making an ultrasonic end seal on a package produced in connection with a horizontal form-and-fill machine, the apparatus comprising:
- mounting means for an ultrasonic horn, a movable ultrasonic horn, means for moving said horn into juxtaposition with one side of the package, a rotatably mounted ultrasonic anvil, means moving the rotatable anvil into juxtaposition with the other side of the package, means for synchronizing the movement of the ultrasonic horn and anvil so that they are simultaneously positioned on opposite sides of the package to accomplish ultrasonic sealing while the package is moving, means for supplying power to the ultrasonic horn when the horn and anvil are simultaneously positioned on opposite sides of the package to effect ultrasonic sealing with the package therebetween, wherein the mounting means for the ultrasonic horn provide adjustable arcuate movement and comprise a crank eccentric mounting means for driving the horn through a movable and adjustable pivot point so that by change of position of the pivot point the residence time in the area of the seal may be increased or decreased.
Dependencies are inferred from the claim text.