Patent ID: 8528134

Claim:
A method of preventing bed bugs from escaping a zipper opening formed at the terminal end of a zipper closure disposed in a closeable apparatus, said closeable apparatus comprising (1) an encasement material formed of a bed bug impervious material, (2) an opening from which bed bugs may escape, and (3) a zipper closure, said zipper closure located in said opening and having a zipper head and a pair of zipper tracks mateable together to provide closure to the zipper opening, said zipper opening formed at the terminal end of the zipper closure by an unzipped portion of said zipper tracks, said zipper head having a lower portion disposed beneath said zipper tracks, said method comprising the steps: a) attaching a barrier beneath the zipper tracks to block bed bugs from approaching said zipper opening at the terminal end of said zipper closure, said attaching including securing a first portion of the barrier at the terminal end of the zipper closure to block bed bug movement along the longitudinal axis of said zipper tracks, securing a second portion of the barrier along one side of said zipper tracks to block bed bug movement orthogonal to the longitudinal axis of said zipper tracks, and securing a third portion of the barrier along the other side of said zipper tracks to block bed bug movement orthogonal to the longitudinal axis of said zipper tracks; b) creating a channel beneath said zipper tracks adjacent the terminal end of the zipper closure, including forming said channel from said barrier to have an entrance (1) spaced a first distance from the terminal end of the zipper closure and (2) disposed beneath the said zipper tracks and of a size for receiving the lower portion of said zipper head, and forming said channel to have a confined space sufficient to permit movement of the lower portion of the zipper head along said channel; and c) forming said channel to block movement of bed bugs along said channel and around said lower portion of said zipper head in order to prevent bed bugs escaping through said zipper opening when said lower portion of said zipper head is disposed in said channel a second distance less than said first distance, from the terminal end of the zipper closure.