Reusable plastic bag with loop handle

Claim 1

A bag comprising a unitary piece of flexible thermoplastic material including generally rectangular front and rear panels of flexible thermoplastic material overlying one another and a gusset integral in one piece with said panels and extending between the edges of said panels along one end of said panels to form a closed end of the bag, said gusset being flexible and having a fold line located between said panels and defining the inner boundary of said gusset, each panel having a fold line at said one end defining the outer boundary portion of said gusset, the other end of said panels being open to facilitate introducing goods into the bag, the side edges of said panels and said gusset being connected together in a manner so that the bag when filled can approximate the shape of a hexahedron with said gusset being flattened to form a substantially planar closed end of the bag, a flexible handle defined by a loop of thermoplastic material collapsible on itself, each end of said loop being welded to a separate one of said panels outside and adjacent the outer boundary portion of said gusset by a weld zone at the loop end, said gusset including frangible means integral therewith to facilitate access to goods in the bag and thereafter permit reuse of the bag, said frangible means facilitating provision of an elongated opening in the gusset substantially perpendicular to the length of the handle, and said loop being longer than the transverse width of the gusset so that a person's arm may extend through the loop for the purpose of supporting the bag when said gusset is flattened.