Method and apparatus for bag closure and sealing

摘要

A method and apparatus for sealing a bag made of a polymeric material by applying heat activated layers on different portions of the bag, wherein the first adhesive layer and the second adhesive layer have respective heat activation temperatures below the softening point temperature of the polymeric material; creasing the bag along a fold line, applying heat at a temperature below the softening point temperature of the polymeric material to activate the first adhesive layer and the second adhesive layer to adhesive states after the bag has been filled with contents; and folding the bag to form an adhesive-to adhesive seal by contact between the heat activated first adhesive layer and the heat activated second adhesive layer.

主权项

1. A bag sealer configured to heat adhesives used to seal bags, the bags each including a front panel having a front surface and a rear panel having a flap configured to be folded over onto the front surface, the front surface and the flap each including an adhesive layer, the mechanism comprising:
a first surface defining a first plurality of openings configured to direct hot air in a first direction toward the adhesive layers of the front surfaces of the bags; a second surface defining a second plurality of openings configured to direct hot air in a second direction toward the adhesive layers of the flaps of the bags, the second direction being generally perpendicular to the first direction, the first surface being generally perpendicular to the second surface; and an inlet duct defining a path for air to pass through the inlet duct to the first plurality of openings.