Stone Container Corporation

Michael R Avila

Robert G Kelley

Don G Giles

Christopher S Wadium

Robert F Kendall

Thomas L Myers

Michael D Abar

Mark D Belser

John P Fuller

Jerry L Aldridge

A valve bag is provided having a self-closing feature to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.

Self-closing sealable valve bag

A method and apparatus for sealing a valved bag transported by a conveyor. The valved bag has a body with a longitudinal axis, a center of gravity, and a sealable valve. At least a portion of the sealable valve protrudes from the body in a substantially perpendicular orientation relative to the longitudinal access. The apparatus includes a conveyor for transporting the valved bag in a direction of travel substantially parallel to its longitudinal access. A stop member stops the transportation of the valved bag when the sealable valve is aligned with a sealing area. A ram member positions the valved bag to dispose at least a portion of the sealable valve into the sealing area. An ultrasonic horn and anvil engage and seal the sealable valve. The stop member is removed from the path of the sealed bag, allowing it to resume transportation along the conveyor.

Apparatus and method for sealing valved bags transported by a conveyor

A valve bag is provided having a self-closing feature, to preclude sifting losses after filling, but before the bag is fully sealed, while enabling the facilitated final secure closure of the bag.

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West Jordan, UT, United States of America

Michael R Avila