Twist tie
A twist tie is a fastener made of one or more metal wires encased in a thin strip of paper or plastic, in such a way that it can bend and retain its shape. Wireless polymeric twist ties have also been developed.[1][2][3]
Use[edit]
It is used to tie the openings of containers including bags, such as garbage bags or bread bags.[4][5] It is also called garden twist wire.[6] A twist tie is used by wrapping it around the item to be fastened, then twisting the ends together.[4] They are often included with boxes of plastic food bags or trash bags, and are commonly available individually in pre-cut lengths, on large spools, or in perforated sheets called gangs.[5]
The outer covering can be in a variety of colors with or without printing.[4] Plain paper, metallic paper, plastic, poly, or custom coatings are popular for different applications.[4] The plastic, poly, or metallic paper twist ties withstand water better than the uncoated paper versions. Different sizes and strengths are used for different applications, from a small closure for a bag of bread to a large, heavy tie to hold unwieldy garden hoses in place. A twist tie with a broad paper covering may also be used for labeling.
The wire is often made of stainless steel or galvanized steel with a diameter between 19 and 31 AWG (0.2 and 0.9 mm).[5]
They were invented by Charles E. Burford in 1961.[7]
Application[edit]
Twist ties can be applied manually. They can be reapplied several times, facilitating reusable packaging. Automatic and semi-automatic equipment is also available. The US Patent Office has listed several hundred patents for automation methods.[8]
See also[edit]
References[edit]
- ^ US US7011879B1, Contaras, ., "Composite polymeric twist tie", published 2006
- ^ US US6663809B1, Haddock, "Wireless polymeric twist tie", published 2003
- ^ US US6663809B1, Haddock, "Wireless polymeric twist tie", published 1992
- ^ a b c d "What are Twist Ties?". Andfel Corporation. Andfel Corporation. Retrieved 11 September 2019.
- ^ a b c "New Trade Case on Imports of Twist Ties from China". JD Supra. June 29, 2020. Retrieved 30 June 2020.
- ^ "Tools - What is the garden wire used for?".
- ^ "Charles Burford dies at 81; inventor created equipment for baking industry". Los Angeles Times. 22 May 2013. Retrieved 24 August 2021.
- ^ Patent classification B65B51/08 Applying binding material, e.g. to twisted bag necks