Five rubber bands

A rubber band (in some regions known as a binder, elastic band, lackey band, "laggy band" or gumband) is a short length of rubber and latex formed in the shape of a loop. LaTeX (ˈleɪtɛ Such bands are typically used to hold multiple objects together. The rubber band was patented in Australia on March 17, 1845 by Stephen Perry. For a topic outline on this subject see List of basic Australia topics. Events 45 BC - In his last victory Julius Caesar defeats the Pompeian forces of Titus Labienus and Pompey the Younger Year 1845 ( MDCCCXLV) was a Common year starting on Wednesday (link will display the full calendar of the Gregorian calendar (or a Common Stephen Perry was a 19th century British Inventor and businessman

Manufacturing

The manufacturing process involves extruding the rubber into a long tube to provide its general shape, putting the tubes on mandrels and curing the rubber with heat, and then slicing it along the width of the tube into little bands. A cylinder is one of the most basic curvilinear geometric shapes the Surface formed by the points at a fixed distance from a given Straight line, the axis ^[1][2] While other rubber products may use synthetic rubber, rubber bands are still primarily manufactured using natural rubber because of its superior elasticity. Elastomer Synthetic rubber is any type of artificially made Polymer material which acts as an Elastomer.

The modern rubber band is different from its ancestor at the time of patenting by Stephen Perry in that rubber is now vulcanized. Vulcanization (or Vulcanisation refers to a specific curing process of Rubber involving high heat and the addition of Sulfur or other equivalent curatives The vulcanization process makes the rubber more durable and elastic, and therefore makes the rubber band more useful.

Rubber Band Sizes

Measuring

Measuring a rubber band

A rubber band has three basic dimensions: Length, width, and thickness. In mathematics the dimension of a Space is roughly defined as the minimum number of Coordinates needed to specify every point within it Length is the long Dimension of any object The length of a thing is the distance between its ends its linear extent as measured from end to end Length is the long Dimension of any object The length of a thing is the distance between its ends its linear extent as measured from end to end Graph theory is a growing area in mathematical research and has a large specialized vocabulary (See picture. )

A rubber band's length is half its circumference. The circumference is the distance around a closed Curve. Circumference is a kind of Perimeter. Its thickness is the distance from the inner circle to the outer circle.

Lay a rubber band down so that it makes a square. Classification A square (regular Quadrilateral) is a special case of a Rectangle as it has four right angles and equal parallel sides The band's width is the height of that band or the square's intersection from the derivative case. If one imagines a long tube of rubber before it is sliced into rubber bands, the band's width is how far apart the slices are cut.

Rubber Band Size Numbers

A rubber band is given a [quasi-]standard number based on its dimensions.

Generally, rubber bands are numbered from small to large, width first. Thus, rubber bands numbered 8-19 are all 1/16 inches wide, with length going from 7/8 inches to 3 1/2 inches. Inches redirects here To see the Les Savy Fav album see Inches. Rubber band numbers 30-34 are for width of 1/8 inches, going again from shorter to longer. For even longer bands, the numbering starts over for numbers above 100, again starting at width 1/16 inches.

The origin of these size numbers is not clear and there appears to be some conflict in the "standard" numbers. For example, one distributor^[3] has a size 117 being 1/16 inch wide and a size 127 being 1/8 inch wide. However, an OfficeMax size 117^[4] is 1/8 inch wide. A manufacturer^[5] has a size 117A (1/16 inch wide) and a 117B (1/8 inch wide). Another distributor^[6] calls them 7AA (1/16 inch wide) and 7A (1/8 inch wide) (but labels them as specialty bands).

References

Rubber bands and heat - http://scifun.chem.wisc.edu/HOMEEXPTS/rubberband.html

External links

• The Unofficial Rubber Band Website
• http://www.madehow.com/Volume-1/Rubber-Band.html