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Rubber band
A rubber band, also known as a binder, elastic band, lackey band, laggy band, gum band, or elastic, is usually ring shaped and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845 by Stephen Perry.〔〕〔(March 17 - Today in Science History )〕〔〔British Patent 13880/1845, "Specification of the Patent granted to Stephen Perry, of Woodland's-place, St. John's-wood, in the County of Middlesex, Gentleman, and Thomas Barnabas Daft, of Birmingham, Manufacturer, for Improvements in Springs to be applied to Girths, Belts, and Bandages, and Improvements in the Manufacture of Elastic Bands. — Sealed March 17, 1845", http://todayinsci.com/Events/Misc/Perry-ElasticBandsPatent.htm〕 Mesoamericans (such as Aztecs and Mayans) were using natural rubber products by 1600 B.C.; they mixed latex with other materials to get desired properties. In 1839, Charles Goodyear developed vulcanization which is used to make rubber today. Most rubber bands are manufactured out of natural rubber. Rubber bands come in a variety of sizes.
==Manufacturing==
Rubber bands are made by extruding the rubber into a long tube to provide its general shape, putting the tubes on mandrels, curing the rubber with heat, and then slicing it across the width of the tube into little bands.〔(How rubber bands are made ).
This reference states that the rubber is vulcanized before it is extruded. The rubber is then "cured" on mandrels. The "Made How" reference appears to directly copy text from other sources, some of which appears to be incorrect. The exact same text regarding Thomas Hancock appears in a 1995 book entitled "CD's, super glue and salsa: how everyday products are made" by Kathleen Witman, Kyung-Sun Lim, Neil Schlager. Contradicting other sources, both credit Thomas Perry rather than Stephen Perry for the invention of the rubber band.〕〔(Lee Rubber Products, How rubber bands are made. ) This reference states that the rubber is vulcanized after it is extruded.〕 This causes the tube to split into multiple sections, creating a rubber band.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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