Zipper storage bag
Resealable plastic bag
From Wikipedia, the free encyclopedia
A zipper storage bag, slider storage bag, zipper bag, ziplock bag, zip-lock bag, ziploc bag, or zippie is an inexpensive flexible rectangular storage bag, usually transparent, made of polyethylene[1][2] or similar plastic, that can be sealed and opened many times, either by a slider, which works in a similar way to a zip fastener, or by pinching together the two sides of a mechanical sealing mechanism with one's fingers. The bags are made in many sizes; a typical small size is 1.5 by 2.5 inches (3.8 cm × 6.4 cm), and a typical large size is 9 by 12 inches (23 cm × 30 cm). Material thickness (gauge) varies; smaller bags are typically 40 to 45 μm.
Many such bags are used to contain foodstuffs, such as sandwiches but not cereal and freezer storage. [clarification needed] Single and multiple small items for sale are often packed in small zipper bags for convenience and visibility.
Several types of reclosable features are available for plastic bags.[3][4] Sometimes other types of bag, such as a cloth bag for toiletries fitted with a conventional zip fastener, are described as zipper bags.[5]
History
One bag was patented by Robert W. Vergobbi on May 18, 1954.[citation needed] In the same year, Minigrip licensed them as pencil bags. The zipper storage bag's most recognized function was not realized until 1957, when a fifth-grader named Robert Lejeune demonstrated that the bag could also be used safely as a food storage device.[6] Eleven years later, in 1968, Dow Chemical Company began marketing them under the name Ziploc. Widetrack ribs were added in 1982, clicking zippers in 1993 and color in 1997.[7]
