Velcro hooks

Velcro loops

Velcro is a company that produces the first commercially marketed fabric hook-and-loop fastener,^[1] invented in 1948 by the Swiss electrical engineer George de Mestral. De Mestral patented Velcro in 1955, subsequently refining and developing its practical manufacture until its commercial introduction in the late 1950s.

The word Velcro is a portmanteau of the two French words velours ("velvet"), and crochet ("hook").^[1][2][3]

Hook-and-loop fasteners consist of two components: typically, two lineal fabric strips (or, alternatively, round "dots" or squares) which are attached (e.g., sewn, adhered, etc.) to the opposing surfaces to be fastened. The first component features tiny hooks; the second features even smaller and "hairier" loops. When the two components are pressed together, the hooks catch in the loops and the two pieces fasten or bind temporarily.^[4] When separated, by pulling or peeling the two surfaces apart, the velcro strips make a distinctive "ripping" sound.

The first Velcro sample was made of cotton, which proved impractical^[5] and was replaced by Nylon and polyester.^[6] Velcro fasteners made of Teflon loops, polyester hooks, and glass backing are used in aerospace applications, e.g. on space shuttles.^[6]

Variations on the standard Velcro hook and loop fasteners include hooks on both faces, buttons, zippers, laces, and buckles.

George de Mestral's patent expired in 1978, but the term Velcro is a registered trademark in most countries. Generic terminology for these fasteners includes "hook and loop", "burr" and "touch" fasteners. While the company states that it does not actually sell any product named "Velcro",^[7] the Velcro brand is an example of a genericized trademark, its brand name having become the generic term in many languages. The Velcro company headquarters is in Manchester, New Hampshire, USA.

History[link]

Tiny hooks can be seen covering the surface of this burr. The design of Velcro imitated this natural mechanism for seed dispersion.

The hook-and-loop fastener was invented in 1941 by Swiss engineer, Georges de Mestral^[2][8][9] who lived in Commugny, Switzerland. The idea came to him one day after returning from a hunting trip with his dog in the Alps. He took a close look at the burrs (seeds) of burdock that kept sticking to his clothes and his dog's fur. He examined them under a microscope, and noted their hundreds of "hooks" that caught on anything with a loop, such as clothing, animal fur, or hair.^[5] He saw the possibility of binding two materials reversibly in a simple fashion if he could figure out how to duplicate the hooks and loops.^[2][9]. This inspiration from nature or the copying of nature's mechanisms (called bionics or biomimesis) is viewed by some like Steven Vogel^[10] or Werner Nachtigall^[11] as a key example.

Originally people refused to take him, and the idea, seriously when he took his idea to Lyon, which was then a center of weaving. He did manage to gain the help of one weaver, who made two cotton strips that worked. However the cotton wore out quickly, so de Mestral turned to synthetic fibers.^[5] He settled on nylon as being the best synthetic, which had several advantages. Nylon doesn’t break down, rot, or attract mold, and it could be produced in threads of various thickness.^[6] Nylon had only recently been invented, and through trial and error he eventually discovered that, when sewn under hot infrared light, nylon forms hooks that were perfect for the hook side of the fastener.^[2] Though he had figured out how to make the hooks, he had yet to figure out a way to mechanize the process, and to make the looped side. Next he found that nylon thread, when woven in loops and heat-treated, retains its shape and is resilient; however, the loops had to be cut in just the right spot so that they could be fastened and unfastened many times. On the verge of giving up, a new idea came to him. He bought a pair of shears and trimmed the tops off the loops, thus creating hooks that would match up perfectly with the loops in the pile.^[5]

Mechanizing the process of weaving the hooks took eight years, and it took another year to create the loom that trimmed the loops after weaving them. In all, it took ten years to create a mechanized process that worked.^[5] He submitted his idea for patent in Switzerland in 1951 and the patent was granted in 1955.^[2] Within a few years he obtained patents and began to open shops in Germany, Switzerland, Great Britain, Sweden, Italy, the Netherlands, Belgium, and Canada. In 1957 he branched out to the textile center of Manchester, New Hampshire in the United States. Columnist Sylvia Porter made the first mention of the product in her column Your Money's Worth of August 25, 1958, writing "It is with understandable enthusiasm that I give you today an exclusive report on this news: A 'zipperless zipper' has been invented — finally. The new fastening device is in many ways potentially more revolutionary than was the zipper a quarter century ago."^[12] A Montreal firm, Velek, Ltd., acquired the exclusive right to market the product in North and South America, as well as in Japan, with American Velcro, Inc. of New Hampshire, and Velcro Sales of New York, marketing the "zipperless zipper" in the United States.^[13]

De Mestral obtained patents in many countries right after inventing Velcro as he expected a high demand immediately. Partly due to its appearance, though, Velcro's integration into the textile industry took time.^{[citation needed]} At the time, Velcro looked like it had been made from leftover bits of cheap fabric, and thus was not sewn into clothing or used widely when it debuted in the early 1960s.^[14] It was also viewed as impractical.^[14]

De Mestral saw Velcro as a replacement for zippers, among other things.

A number of Velcro items were displayed at a fashion show at the Waldorf-Astoria hotel in New York in 1959,^[15] however the fabric got its first break when it was used in the aerospace industry to help astronauts maneuver in and out of bulky space suits. However, this reinforced the view among the populace that Velcro was something with very limited utilitarian uses. The next major use Velcro saw was with skiers, who saw the similarities between their costume and the astronauts, and thus saw the advantages of a suit that was easier to don and remove. Scuba and marine gear followed soon after. After seeing astronauts storing food pouches on walls^[16], children's clothing makers came onboard.^[14] As Velcro only became widely used after NASA's adoption of it, NASA is popularly — and improperly — credited with its invention. By the mid-1960s Velcro was used in the futuristic creations of fashion designers such as Pierre Cardin, André Courrèges and Paco Rabanne.^[17]

Later improvements included strengthening the filament by adding polyester.^[6]

In 1978 de Mestral's patent expired, prompting a flood of low-cost imitations from Taiwan, China and South Korea onto the market. Today, the trademark is the subject of more than 300 trademark registrations in over 159 countries.^[specify] George de Mestral was inducted into the national inventors hall of fame for his invention.^[5] He once offered some advice to Velcro executives:

"If any of your employees ask for a two-week holiday to go hunting, say yes."

The big breakthrough George de Mestral made was to think about hook-and-eye closures on a greatly reduced scale. Hook and eye fasteners have been common for centuries, but what was new about Velcro was the scale of the hooks and eyes. Shrinking the hooks led to the two other important differences. Firstly, instead of a single-file line of hooks, Velcro has a two-dimensional surface.^[18] This was needed, because in decreasing the size of the hooks, the strength was also unavoidably lessened, thus requiring more hooks for the same strength. The other difference is that Velcro has indeterminate match-up between the hooks and eyes. With larger hook and eye fasteners, each hook has its own eye. On a scale as small as that of Velcro, matching up each of these hooks with the corresponding eye is impractical, thus leading to the indeterminate matching.^[18]

Genericized trademark[link]

The Velcro brand is an example of a genericized trademark — a brand name that has become the generic term for a type of product. The Velcro company has forbidden its employees to use the term "Velcro",^[14] in an effort to stop this. Instead the employees must use the generic terms "hook and loop fastener", "hook tape", or "loop tape". The company is very protective, and refer to their product as "the Velcro brand hook-and-loop fastener". The company publishes detailed trademark guidelines designed to preserve the strength of the Velcro brand.^[19]

Besides being used as a generic term for hook and loop fasteners, the word "Velcro" has also become a verb, as in "Velcroed", which means to be attached by Velcro. It has been used as such since approximately 1972.^[20]

Strength[link]

The hooks on a piece of Velcro

The loops on a piece of Velcro

Velcro is strong enough that a two inch square piece is enough to support a 175-pound (79 kg) person.^[14] The strength of the bond depends on how well the hooks are embedded in the loops, how much surface area is in contact with the hooks, and the nature of the force pulling it apart. If Velcro is used to bond two rigid surfaces, e.g. auto body panels and frame, the bond is particularly strong because any force pulling the pieces apart is spread evenly across all hooks. Also, any force pushing the pieces together is disproportionally applied to engaging more hooks and loops. Vibration can cause rigid pieces to improve their bond. Full-body Velcro suits have been made that can hold a person to a suitably covered wall.

When one or both of the pieces is flexible, e.g. a pocket flap, the pieces can be pulled apart with a peeling action that applies the force to relatively few hooks at a time. If a flexible piece is pulled in a direction parallel to the plane of the Velcro surface, then the force is spread evenly as it is with rigid pieces.

Three ways to maximize the strength of a bond between the two flexible pieces are:

• increase the area of the bond, e.g. using larger pieces of Velcro
• ensure that the force is applied parallel to the plane of the fastener surface, e.g. bending around a corner or pulley.
• increase the number of hooks and loops per area unit.

Shoe closures can resist a large force with only a small amount of Velcro. This is because the strap is wrapped through a slot, halving the force on the bond by acting as a pulley system (thus gaining a mechanical advantage), and further absorbing some of the force in friction around the tight bend. This layout also ensures that the force is parallel to the Velcro strips.

Advantages and disadvantages[link]

In favor of Velcro, it is easy to use, safe, and maintenance free. There is only a minimal decline in effectiveness even after many fastening and unfastenings. The tearing noise it makes can also be useful against pickpockets. Additionally, in the United States Air Force, where Velcro is used to attach patches to flight suits, aircrew have learned that they can remove small cloth pile balls that accumulate on the suits by using the hook side on the back of the patches like a brush to remove them.

Velcro has several deficiencies: it tends to accumulate hair, dust, and fur in its hooks after a few months of regular use. The loops can become elongated or broken after extended use. Velcro often becomes attached to articles of clothing, especially loosely woven items like sweaters. Additionally, the clothing may be damaged when one attempts to remove the Velcro, even if they are separated slowly. The tearing noise made by unfastening Velcro makes it inappropriate for some applications. For example, a soldier hiding from the enemy would not want to alert the enemy to his position by opening a Velcro pocket.^[2] It also absorbs moisture and perspiration when worn next to the skin, which means it will smell if not washed.

Textiles can contain chemicals or compounds, e.g. dyes,^[21] that may be allergenic to sensitive populations. Velcro products have been tested according to the Oeko-tex certification standard which imposes limits on the chemical content of textiles to address the issue of human ecological safety.

Applications[link]

A shoe using Velcro closures

NASA astronaut Greg Chamitoff ponders his next move with a Velcro-modified chess set on board the ISS. Also visible up and to the left are bare Velcro pads for affixing

Because it is easy to use, maintenance free and safe, the hook-and-loop fasteners have been used for just about every conceivable application where a temporary bond is required. It is especially popular in clothing where it replaces buttons or zippers, and as a shoe fastener for children who have not yet learned to tie shoelaces and for those who choose Velcro over laces. Velcro is used in adaptive clothing, which is clothing designed for people with physical disabilities, the elderly, and the infirm who may experience difficulty dressing themselves due to an inability to manipulate closures, such as buttons and zippers. As Velcro is easier to manipulate, it makes a good replacement.

Velcro held together a human heart during the first artificial heart surgery, and it is used in nuclear power plants and army tanks to hold flashlights to walls. Cars use it to bond headliners, floor mats and speaker covers. It is used in the home when pleating draperies, holding carpets in place and attaching upholstery, among many other things.^[5] It closes backpacks, briefcases and notebooks, secures pockets, and holds disposable diapers, and diaper covers for cloth diapers, on babies. It is an integral part of the game tag rugby, is used in surfboard leashes and orthopaedic braces.

NASA makes significant use of Velcro. Each space shuttle has ten thousand inches of a special Velcro made of Teflon loops, polyester hooks, and glass backing.^[6] Velcro is used everywhere, from the astronauts' suits, to anchoring equipment. In the near weightless conditions in orbit, Velcro is used to temporarily hold objects and keep them from floating away.^[22] A Velcro patch is used inside astronauts' helmets where it serves as a nose scratcher.^[5][6] During mealtimes astronauts use trays that attach to their thighs using spring and Velcro fasteners.^[16]

The US Army is another big user. It uses Velcro fasteners on combat uniforms to attach name tapes, rank insignia, shoulder pockets for unit patches, skill tabs, and recognition devices, such as the infrared (IR) feedback American flag. They also had a silent version of Velcro developed for use with Army soldier uniforms, as the ripping sound could betray a soldier's position. A new version was created which reduced the noise by over 95%. The manufacturing process to create this noiseless Velcro is, however, a military secret.^[6]

RFID attached with Velcro

There have been some failed uses for Velcro as well. One such failure was a worm collar that consisted of a cylindrical strip that fishers were supposed to slip over their live bait. The Velcro was supposed to snag in the teeth of striking bass. Another failure was a strap-on device for impotent men.^[6]

Variations on Velcro[link]

Leonard Duffy, noting the disadvantages of Velcro, and taking Velcro as his model, created a new product called the "slidingly engaging fastener". Instead of loops and hooks, it has interlocking islands with undercut edges that slide together.^[23][24] Duffy then created a wraparound cast made from a single plastic sheet sealed with his fasteners to replace similar removable casts with Velcro straps. His sister-in-law had a removable cast with Velcro strips, and complained about the Velcro because it absorbed perspiration and thus smelled, as well as catching on her clothing.^[23][24] With the Unity Wrap, Duffy won the grand prize in NASA's "Create the Future" invention contest. Since then the sliding engaging fastener has become available at Material ConneXion, a global materials consultancy and library of innovative and sustainable materials, and several designers and a prosthetics company have expressed interest.^[23][24]

The advantages of this new Velcro are that it is more durable (it does not wear down over time), is eight times stronger, and makes no noise when fastened or unfastened.^[23][24] However it is thicker and bulkier, which limits some of its applications. It also is not as flexible as Velcro.

Heavy duty variants (e.g., "Dual Lock" by 3M) feature mushroom shaped stems on each face of the Velcro, providing an audible snap when the two faces mate. A strong adhesive backing adheres each component to its substrate.

See also[link]

• Adaptive clothing
• Biomimicry
• Metaklett

References[link]

External links[link]

Wikimedia Commons has media related to: Velcro

Look up velcro in Wiktionary, the free dictionary.

• Velcro Official US company website
• closeup of Velcro hooks and loops
• VELCRO Patent - from Google Patents Anniversary

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A Love
File:A Love.jpg A Love (Sarang) movie poster
Hangul	사랑
RR	Sarang
MR	Sarang
Directed by	Kwak Kyung-taek
Produced by	Jeong Tae-Won Yang Jung-Gyeong
Written by	Kwak Kyung-taek
Starring	Ju Jin-mo Park Si-yeon
Editing by	Park Gwang-Il
Release date(s)	September 19, 2007 (2007-09-19)
Running time	104 min.
Country	South Korea
Language	Korean

A Love (사랑 - Sarang) is a 2007 South Korean film directed by Kwak Kyung-taek. Kwak Kyung-taek's most notable film is Chingoo. A Love stars Ju Jin-mo from 200 Pounds Beauty and Park Si-yeon.

Plot[link]

At age 17, In ho meets a girl as beautiful as a watercolor painting, and promises to protect her after her brother dies. Although he is the best fighter in his school, he dreams of making his mother proud by going to college. It takes him 7 years to confess to the girl of his dreams. He stabs a gangster in the neck for her, although he wanted to live quietly like everyone else. But to keep his promise to protect her, he stabs Chi-kwon, a notorious mobster in Busan. He devotes his life to working for Chairman Yoo. He buries his love for the vanished girl and gets a second chance while working at the docks. He offers his life to the man who first holds out his hand for him. The girl he cannot forget returns as a love he cannot have. She becomes his patron’s woman and beyond reach... But as he decides to be happy for once in life, cruel destiny rattles everything in his life.

Cast[link]

• Ju Jin-mo - In-ho
• Park Si-yeon - Mi-Ju
• Joo Hyun
• Kim Min-jun

See also[link]

• List of Korean language films
• Korean cinema
• List of Korea-related topics

External links[link]

• Official site (Korean)
• Sa-rang (2007) at the Internet Movie Database
• A Love at HanCinema

v t e Cinema of Korea List of Korean language films · List of pre–1948 films (A–Z) People Actors · Animators · Directors (list) · Producers · Screenwriters · Cinematographers · Editors Topics Animation · Animation studios · Festivals · K-Horror   Cinema of North Korea List of films (A–Z) People Actors · Directors · Producers · Screenwriters Topics Festivals   Cinema of South Korea List of films (A–Z) People Actors (list) · Directors · Producers · Screenwriters · Cinematographers · Editors · Score composers · Critics Topics Chungmuro · Animation · Animation studios · Production companies · Festivals (list) · Awards Box Office 2006 · 2007 · 2008 · 2009 · 2010 · 2011 1948 · 1949 1950 · 1951 · 1952 · 1953 · 1954 · 1955 · 1956 · 1957 · 1958 · 1959 1960 · 1961 · 1962 · 1963 · 1964 · 1965 · 1966 · 1967 · 1968 · 1969 1970 · 1971 · 1972 · 1973 · 1974 · 1975 · 1976 · 1977 · 1978 · 1979 1980 · 1981 · 1982 · 1983 · 1984 · 1985 · 1986 · 1987 · 1988 · 1989 1990 · 1991 · 1992 · 1993 · 1994 · 1995 · 1996 · 1997 · 1998 · 1999 2000 · 2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 2010 · 2011 Category

This South Korean film-related article is a stub. You can help Wikipedia by expanding it. v t e

Pete Yorn
Yorn in 2006
Background information
Birth name	Peter Joseph Yorn
Born	(1974-07-27) July 27, 1974 (age 37) Montville, New Jersey, United States
Genres	Rock Singer-songwriter
Instruments	Vocals Guitar Harmonica drums
Years active	2000–present
Labels	Columbia, Rhino, Vagrant, Warner Brothers (France), Trampoline
Associated acts	Minibar
Website	www.peteyorn.com

Peter Joseph Yorn (born July 27, 1974, Montville, New Jersey, United States) is an American singer-songwriter and guitarist who first gained international recognition after his debut record, Musicforthemorningafter, was released to critical acclaim in 2001.

Early history[link]

Yorn's father is a retired dentist and his mother is a former school teacher and real estate agent. His brother Rick is a major talent manager in Hollywood,^[1] while his brother Kevin is an entertainment lawyer who represents stars such as Scarlett Johansson.^[2] He grew up in Montville, New Jersey, where he attended Montville Township High School.^[3][4]

Breakthrough[link]

Yorn was encouraged enough to maintain a focus on music while attending Syracuse University (class of 1996) where he was a major in the department of Communication and Rhetorical Studies and a member of the Delta Upsilon Fraternity. After graduating, Yorn moved to Los Angeles, where he began to attract a following with his performances at Cafe Largo. He was signed to Columbia records in 1999. Shortly after, film producer Bradley Thomas (Kingpin & There's Something About Mary) liked Yorn's act enough to request Yorn send him some rough demos for possible inclusion in the Farrelly Brothers' film Me, Myself and Irene. Soon after, Yorn landed a job scoring all of the music to the film and also contributed the songs "Strange Condition" and "Just Another" to the film and its soundtrack.

After experiencing this taste of success, Yorn released his 2001 LP debut, entitled musicforthemorningafter, which went gold on the strength of the album's lead single, "Life on a Chain." Rolling Stone Magazine named Yorn one of "Ten [artists] to Watch in 2001" and gave the album a favorable four-star rating.

Yorn went on to release the 2003 album Day I Forgot which has sold over 300,000 copies to date and scored a third radio hit with the song "Come Back Home."

In 2006, Yorn released his third album, Nightcrawler. Nightcrawler was named one of the top 20 records of 2006 by Paste magazine.

Guitarist Peter Buck of the band R.E.M. has made appearances on several Pete Yorn recordings, including instrumentation on the single version of "Strange Condition" and a number of songs from the Day I Forgot LP. Yorn has worked with producers R. Walt Vincent, Brad Wood, and Ken Andrews of Failure and Year of the Rabbit, in addition to several other producers including Scott Litt, Butch Walker and Sonic Youth producer Don Fleming.

Yorn has shared bills with the Dave Matthews Band, R.E.M., Crowded House, Foo Fighters, Weezer, Coldplay, The Dixie Chicks, Semisonic, and Sunny Day Real Estate, among others.

Yorn's song, "Lose You" can be heard just before the ending credits of the episode "Simple Explanation" during Kutner's funeral on the Fox show House, MD.

The Trilogy[link]

Pete Yorn's third studio release, Nightcrawler, completes a conceptual trilogy of sorts,^[5] which spans his first three albums (EPs not included); beginning in the morning with the musicforthemorningafter LP, continuing through the day with the Day I Forgot LP, and arriving at nightfall with the Nightcrawler LP.

In September 2006, in an interview with silentuproar.com, Yorn elaborated on his true intentions behind the trilogy, remarking that it was at least partially a conscious trilogy but wasn't meant to be taken too seriously: "I didn't mean like a Star Wars trilogy where it's one story at all." Yorn expressed that the "trilogy" was more of a diary of sorts; a person gaining new life experiences and simply commenting on them in linear order. "So it's a sort of continuing analysis of those topics, and the Nightcrawler LP would represent a later phase," Yorn said.^[5]