Bag with elastic strip and method of making the same

摘要

Provided is a plastic bag (100) including a live elastic strip (120) that, in the elastic strip's normal condition, contracts thereby constricting an opening of the bag to assist in retaining the bag to an object. The elastic strip includes a first region (150) that is continuously attached to a sidewall of the bag between a first side edge (106) and a second side edge (108) of the bag and a region (or typically two regions either side of attached region 150) that remains unattached to the sidewall. The attached region does not contract but instead forces the portion of the sidewall to which it is attached to pucker into a serpentine path. The unattached region (or regions) does (do) contract causing the portion of the sidewall to which it is adjacent to bunch together. Also provided is a method for manufacturing a plastic bag that involves stretching a live elastic tape and continuously attaching a region of the stretched tape to a web of plastic material.