Method of manufacturing headerless produce bags with increased adhesion
AssigneeNew York Packaging II
InventorJEFFREY D. RABIEA
Life of this patent
Estimating the term…
Abstract
During the manufacturing process the exterior surface of one or both of the sheets of plastic film which form the bags is treated with low temperature corona discharge plasma to raise the level of surface charge magnitude to at least 43 Dyne to increase the adhesion force between the bags. A recess is formed in each of the bags to further increase the adhesion. The increased adhesion causes the mouth of one bag to automatically open as the adjacent bag is removed from the rack. The recess is formed at the same time openings are created in the bags to accept the support rods of a dispensing rack. The bags can have simple edge sides or side gussets and may be provided in a package including a pouch which receives and supports the lower portions of the bags.
Claims26
A method for manufacturing a plastic bag from sheets of plastic film comprising the steps of:
- forming a plastic bag having an exterior surface;
- treating the plastic bag by exposing the exterior surface to low temperature corona discharge plasma to increase the surface charge magnitude thereof to at least 43 Dyne;
- and forming a recess in the bag.
A method for manufacturing a plastic bag from sheets of plastic film comprising the steps of:
- forming a plastic bag having an exterior surface;
- treating the plastic bag by exposing the exterior surface to low temperature corona discharge plasma to increase the surface charge magnitude thereof;
- and forming a recess in the bag.
A method of increasing adhesion between the exterior surfaces of first and second plastic bags of the type formed from sheets of plastic film comprising the steps of:
- treating one of the bags by exposing the exterior surface thereof to a low temperature corona discharge plasma to increase the surface charge magnitude to at least 43 Dyne;
- creating a recess in each of the bags, and aligning the bags such that the exterior surface of the treated bag is adjacent the other bag;
- wherein the exterior surface of the treated adheres to the second bag with sufficient force to automatically open the mouth of the second bag as the treated bag is moved away from the other bag.
A produce bag comprising first and second plastic sheets joined at the sides and bottom to form a compartment adapted to receive a product, one of said plastic sheets having an exterior surface with a surface charge magnitude of at least 43 Dyne, and at least one of said sheets comprising a recess.
First and a second aligned produce bags, each of said bags comprising first and second plastic sheets joined at the sides and bottom to form a compartment with an unsealed mouth adapted to receive a product, said first plastic bag having an exterior surface with a surface charge magnitude of at least 43 Dyne which is adjacent said second plastic bag, each of said bags having a recess, such that said exterior surface of said first bag adheres to said second bag with sufficient force to automatically open the mouth of the second bag as the first bag is moved away from the second bag.
Dependencies are inferred from the claim text.