Electrostatic pinning in a process for gusseting film web
AssigneeDowbrands L.P.
InventorRaymond D. Barta
Life of this patent
Estimating the term…
Abstract
Disclosed is an apparatus and process for gusseting plastic film web having a means for applying an electrostatic charge of negative or positive polarity to the gusset to maintain stable gusset folds prior to storing or processing the gusseted web into a multiplicity of gusseted bags.
Claims9
Apparatus for gusseting a continuous, dual-walled plastic film web having walls integrally connected along at least one continuous edge, comprising means for providing the web, means for forming a gusset having gusset folds extending continuously along at least one integrally connected edge of the web, means for applying an electrostatic charge of sufficient magnitude to the gusset to cause the gusset folds to cling to each other, and means for disposing of the film web.
Dependencies are inferred from the claim text.