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Can opener

From Wikipedia, the free encyclopedia
For other uses, see Can opener (disambiguation).

A late-20th-century Bunker style can opener with a rotating cutting wheel and a counter-rotating serrated wheel, for left-handed use

A can opener (North American and Australian English) or tin opener (British English) is a mechanical device used to open metal tin cans. Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States. These early openers were basically variations of a knife, though the 1855 design continues to be produced.

The can opener consisting of the now familiar sharp rotating cutting wheel that runs round the can's rim to cut open the lid was invented in 1870, but was considered very difficult to operate for the ordinary consumer. A more successful design came out in 1925 when a second, serrated wheel was added to hold the cutting wheel on the rim of the can. This easy-to-use design has become one of the most popular can opener models.

Around the time of World War II, several can openers were developed for military use, such as the American P-38 and P-51. These featured a robust and compact design with a pull cutting blade hinged to a corrugated handle with a pivot. Electric can openers were introduced in the late 1950s and met with success. The development of new can opener types continues with a recent redesign of a side-cutting model.

Invention of cans

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Peach can, September 5, 1856

Food preserved in tin cans was in use by the Dutch Navy from at least 1772.[1] Before 1800, there was already a small industry of canned salmon in the Netherlands. Freshly caught salmon were cleaned, boiled in brine, smoked and placed in tin-plated iron boxes. This canned salmon was known outside the Netherlands, and in 1797 a British company supplied one of their clients with 13 cans. Preservation of food in tin cans was patented by Peter Durand in 1810. The patent was acquired in 1812 by Bryan Donkin, who soon set up the world's first canning factory in London in 1813.

"Simplex" can sealing machine

By 1820, canned food was a recognised article in Britain and France and by 1822 in the United States.[1] The first cans were robust containers, which weighed more than the food they contained and required ingenuity to open, using whatever tools available. The instruction on those cans read "Cut round the top near the outer edge with a chisel and hammer."[2][3] The gap of decades between the invention of the can and can opener may be attributed to the functionality of existing tools versus the cost and effort of a new tool.[4]

Types

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Twist-key

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A twist-key can opener
A twist-key can opener in use

During the 1800s,[5] the canning process was mechanised and refined. Can walls became thinner, but there still was no general-purpose can opener.

The twist-key style was patented by J. Osterhoudt in 1866.[6] Each can produced for its use came with a soldered-on twist-key, which snapped off after fatiguing it’s attachment point by bending back-and-forth. Different food types came in their own style and shape of can, each with a corresponding twist-key. Tinned fish (such as sardines) were sold in flat rectangular cans. A twist-key would be inserted into a fold out tab, then rolled around the top of the can peeling back a pre-scored strip of metal.[7] Coffee,[8] beans, and most other types of meat, were packaged in cylinders, with appropriate sized keys that operated in the same manner.[9]

Lever

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Lever-type can opener design of 1855 by Robert Yeates
Bull-head push-lever-type can opener of 1865
Lever-type can opener design of 1858 by Ezra Warner

General-purpose can openers first appeared in the 1850s and had a primitive claw-shaped or "lever-type" design. In 1855, Robert Yeates, a cutlery and surgical instrument maker of Trafalgar Place West, Hackney Road, Middlesex, UK, devised the first claw-ended can opener with a hand-operated tool that haggled its way around the top of metal cans.[10]

In 1858, another lever-type opener of a more complex shape was patented in the United States by Ezra Warner of Waterbury, Connecticut, US. It consisted of a sharp sickle, which was pushed into the can and sawed around its edge. A guard kept the sickle from penetrating too far into the can. The opener consisted of several parts which could be replaced if worn out, especially the sickle.[11] This opener was adopted by the United States Army during the American Civil War (1861–1865); however, its unprotected knife-like sickle was too dangerous for domestic use. A home-use opener named the "Bull's head opener" was designed in 1865 and was supplied with cans of pickled beef named "Bully beef". The opener was made of cast iron and had a very similar construction to the Yeates opener, but featured a more artistic shape and was the first move towards improving the look of the can opener. The bull-headed design was produced until the 1930s and was also offered with a fish-head shape.[2]

Rotating wheel

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The first rotating wheel can opener was patented in July 1870 by William Lyman of Meriden, Connecticut, US and produced by the firm Baumgarten in the 1890s.[12] The can was to be pierced in its centre with the sharp metal rod of the opener. Then, the length of the lever had to be adjusted to fit the can size, and the lever fixed with the wingnut. The top of the can was cut by pressing the cutting wheel into the can near the edge and rotating it along the can's rim.[13]

The necessity to pierce the can first was a nuisance, and this can opener design did not survive. In 1920, Edwin Anderson[14][15][16] patented a can opener with pivoted handles with which to hold the can in one hand while a key-type handle geared to a cutting wheel is turned with the other cutting the outside of the lip,[17][18][19] a side can opener, unlike the gramophone-like orientation of most contemporary can openers, in effect a hand-held pliers version of the Swanson Can-Opener.[20] In 1925,[21] the Star Can Opener Company[22] of San Francisco, California, US had improved Lyman's design by adding a second, serrated wheel, called a "feed wheel", which allowed a firm grip of the can edge.[23] This addition was so efficient that the design is still in use today.[24][25][26][27][28]

Whereas all previous openers required using one hand or other means to hold the can, can-holding openers simultaneously grip the can and open it. The first such opener was patented in 1931 by the Bunker Clancey Company of Kansas City, Missouri and was, therefore, called the "Bunker". It featured the now standard pliers-type handles, when squeezed would tightly grip the can rim, while turning the key would rotate the cutting wheel, progressively cutting the lid along the rim. The cutting wheel is coupled to a serrated feed wheel as in the Star design[29][15] and rotated in the opposite direction by interlocking cogwheels reducing friction. The Bunker company was absorbed by the Rival Manufacturing Company, also of Kansas City, in 1938.[2]

A new style of the can opener emerged in the 1980s. Whereas most other openers remove the lid by cutting down through the lid from the top just inside the rim, removing the top and leaving the rim attached to the can, these use a roller and cutting wheel to cut through the outside seam of the can. The can is left with a relatively safe, non-jagged edge, and the top can be set back on top as a cover, although it does not provide a seal.[30] The feed wheel teeth have a somewhat finer pitch than those of earlier designs and reside at the bottom of a V-shaped groove, which surrounds the rim on three sides at the point of action.[31][32]

  • 1870 William Lyman can opener
    1870 William Lyman can opener
  • 1920 Star Can Opener
    1920 Star Can Opener
  • 1925 Double-wheel design
    1925 Double-wheel design
  • 1931 Bunker opener
    1931 Bunker opener

Church key

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Main article: Church key
Classic church key, three views. The left end is a can piercer and the right end is a bottle cap lifter.
A combination "butterfly" serrated-wheel raking-blade can opener and church key, with can piercer on left and bottle opener on right

The church key opener began as a simple hand-operated device for prying the cap off a glass bottle. Called a "crown cork" or "bottle cap", this kind of closure was invented in 1892.[33][34] The first church key style openers was patented in Canada in 1900.[35]

In 1935, steel beer cans with flat tops appeared, and a device to pierce the lids was needed. The same opener was used for piercing those cans. Made from a single piece of pressed metal, with a sharp point at one end, it was devised by D. F. Sampson,[36][37] and licensed by the American Can Company, which depicted operating instructions on the cans.[38] The church key opener is still being produced, sometimes as part of another opener.[39][40][41][42] For example, a "butterfly" opener is often a combination of the church key and a serrated-wheel opener. Beer and soda cans began in the mid-1960s to feature pop-tabs, which eliminated the need to manually pierce the can.[43]

Folding

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The first known folding pocket can opener, advertised as being for explorers, "Explorador español", was designed by D. José Valle Armesto and manufactured in Spain in 1906. It also opened bottle caps and could be used as an emergency screwdriver.[44][45][46][47]

Main article: P-38 can opener
P-51 and P-38 openers

A simplified folding can opener described as “designed especially for use by campers and Boy Scouts” and suitable for carrying on a key ring appeared in the 1924 Popular Mechanics magazine. [48]

Its straightforward and robust design, fully-fledged at that time (differing from the P-38 based on it only by having its lanyard hole on the opposite end of its body), is shown in a photograph in use, with an accompanying full view illustration. [48]

With only that one small change, the P-38 was adopted by the United States Armed Forces in 1942 and issued in canned field rations from World War II to the 1980s. It is 1.5 inches (38 mm) long, and consists of a short metal handle (that can be used as an emergency screwdriver), with a small, hinged metal tooth that folds out to pierce the can lid. A notch just under the hinge keeps the opener hooked beneath the rim of the can as the device is "walked" around it to cut the lid out. A larger 51 mm (2.0 in) version, the P-51, offers greater leverage and is somewhat easier to operate.

The P-38 and P-51 were cheaper to manufacture and smaller and lighter to carry than any other self-contained can opener, often worn on a dog tag chain using its small punched hole.[49]

P-38s are no longer used for individual rations by the United States Armed Forces, as canned C-rations were replaced by soft-pack MREs in the 1980s.

Various similar folding can openers are described at the P-38 article.

Electric

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A fully automatic can opener by Mark Sanders

The first electric can opener was modeled after the rotating wheel can opener design and patented in 1931.[50] Advertised as capable of removing lids from more than 20 cans per minute without risk of injury,[51] it nevertheless found little success.

Electric openers were re-introduced in 1956 by two American companies. Klassen Enterprises of Centreville[where?] brought out a wall-mounted electric model,[52] but this complex design was unpopular too.[2] The same year, Walter Hess Bodle invented a freestanding device, combining an electric can opener and knife sharpener.[53] He and his family members built their prototype in his garage, with daughter Elizabeth sculpting the body design. It was manufactured under the "Udico" brand of the Union Die Casting Co. in Los Angeles, California, US and was offered in Flamingo Pink, Avocado Green, and Aqua Blue, popular colors of the era. These openers were introduced to the market for Christmas sales and found immediate success.[2]

See also

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References

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  1. ^ a b Gordon L. Robertson (2006). Food packaging. CRC Press. pp. 122–123. ISBN 0-8493-3775-5.
  2. ^ a b c d e "Lifting the lid on the tin can opener" (PDF). Archived from the original (PDF) on 26 July 2011. Retrieved 8 August 2009.
  3. ^ "Can opener". Archived from the original on 2 January 2010. Retrieved 8 August 2009.
  4. ^ Ridely, Matt (14 September 2012). "Don't Look for Inventions Before Their Time". The Wall Street Journal. Retrieved 8 April 2015.
  5. ^ Esther Inglis-Arkell – Nov 27, 2017 1:58 pm UTC (27 November 2017). "Don't lose a finger: The 200-year evolution of the can opener". Ars Technica. Retrieved 1 March 2020.{{cite web}}: CS1 maint: numeric names: authors list (link)
  6. ^ J. Osterhoudt "Improved Method of Opening Tin Cans" U.S. patent 58,554 2 October 1866
  7. ^ "History of the Can: Can Opener". Archived from the original on 8 July 2012. Retrieved 8 August 2009.
  8. ^ File:1965 - Trexler Park Coffee Can - Allentown PA.jpg
  9. ^ Mjtrinihobby in HomeLife-hacks. "How to Open a Can of Corned Beef. : 4 Steps (with Pictures)". Archived from the original on 8 January 2019. Retrieved 1 March 2020.
  10. ^ Encyclopedia of Kitchen History. Taylor & Francis Group. 27 September 2004. ISBN 978-1-57958-380-4.
  11. ^ Ezra J. Warner (5 January 1858) "Can opener" U.S. patent 19,063
  12. ^ William W. Lyman "Improvement in can openers" U.S. patent 105,346 12 July 1870.
  13. ^ Bryan H. Bunch, Alexander Hellemans (2004). The history of science and technology. Houghton Mifflin Harcourt. p. 398. ISBN 0-618-22123-9.
  14. ^ Stern, Daniel (27 January 1921). "American Artisan". Keeney Publishing Company – via Google Books.
  15. ^ a b "Star Can Opener Co. v. Bunker-Clancey Mfg. Co., 41 F.2d 142 | Casetext". casetext.com. Archived from the original on 27 January 2020.
  16. ^ "Star Can Opener Company Of San Francisco California 1920". eBay.
  17. ^ U.S. patent 1,360,256
  18. ^ Side can opener
  19. ^ File:Can Opener, Pictorial Equipment Article, Kellogg. (3855920935).jpg
  20. ^ File:FMIB 45262 Swanson Can-Opener - a new and practical device invented by a practical canneryman Will open any size, any diameter, any style.jpeg
  21. ^ "Western Canner and Packer". Miller Freeman Publications of California. 27 January 1924 – via Google Books.
  22. ^ 1927 City Directory, San Francisco CA – Page 2029
  23. ^ "Star Can Opener Advertising San Francisco Vintage Kitchen | Etsy". 26 January 2020. Archived from the original on 26 January 2020. Retrieved 27 January 2020.{{cite web}}: CS1 maint: bot: original URL status unknown (link)
  24. ^ U.S. patent 1,598,841
  25. ^ U.S. patent 1,528,178
  26. ^ "Official Gazette of the United States Patent Office". The United States Patent Office. 27 January 1943 – via Google Books.
  27. ^ U.S. patent 180,307
  28. ^ U.S. patent 174,161
  29. ^ Charles Arthur Bunker, "Can opener", U.S. patent 1,838,525, 29 December 1931.
  30. ^ Technology Connections (14 January 2022). "Lessons from a Can Opener". YouTube.
  31. ^ Paul Porucznik, Keith Longstaff, "Can Openers" U.S. patent 4,782,594 5 April 1984
  32. ^ Kun-Jen Chang, "Side cutting can opener with a double grip" U.S. patent 5,946,811 4 November 1997
  33. ^ William Painter (2 February 1892) "Bottle sealing device" U.S. patent 468,258
  34. ^ Churchkey. Worldwidewords.org (2 November 2002). Retrieved on 2013-03-20.
  35. ^ Mario Theriault (2001) Great Maritime Inventions 1833–1950, Goose Lane, p. 21 ISBN 0-86492-324-4
  36. ^ United States Bartenders Guild Newsletter. bartenderschoolofsantarosa.com
  37. ^ Short History of the Beer Can (part 2) Archived 20 July 2011 at the Wayback Machine. Streeter.org. Retrieved on 20 March 2013.
  38. ^ Flat Top Beer Cans. ebeercans.com
  39. ^ Jonathan Lighter, ed. (1994). Historical Dictionary of American Slang. Vol. 1, A–G. New York: Random House. p. 422. Archived from the original on 4 December 2018. Retrieved 31 January 2010.
  40. ^ Timeline: History of Beer Cans. Rustycans.com. Retrieved on 20 March 2013.
  41. ^ Beer can history. Brewery Collectibles Club of America
  42. ^ church key. plateaupress.com.au
  43. ^ Burrington, JD (1976). "Aluminum "pop tops". A hazard to child health". JAMA. 235 (24): 2614–7. doi:10.1001/jama.1976.03260500030022. PMID 946866.
  44. ^ "El abrelatas patentado en Gijón en 1906 que se sigue usando en todo el mundo". El economista. 22 June 2024. Retrieved 24 June 2024.
  45. ^ "José Valle Armesto". El Progreso. 4 April 2019. Retrieved 24 June 2024.
  46. ^ "La historia del gallego que inventó el abrelatas de bolsillo". El Español. 28 March 2021. Retrieved 24 June 2024.
  47. ^ "La historia del gallego que inventó el abrelatas de bolsillo". El Faro de Vigo. 7 December 2021. Retrieved 24 June 2024.
  48. ^ a b "Time and Money Savin- Tools for Women's Workshop in Home". Popular Mechanics. April 1924. Retrieved 26 May 2016. Can Opener Especially Designed For Campers And Boy Scouts, That Can Be Folded Flat And Carried On A Key Ring
  49. ^ R. Foster (18 August 1995). "The greatest Army invention ever". Pentagram (Army Public Affairs). Archived from the original on 23 October 2009. Retrieved 8 August 2009.
  50. ^ Preston C. West "Can opener" U.S. patent 1,834,563 1 December 1931
  51. ^ "Popular Science". The Popular Science Monthly. 123 (5). Bonnier Corporation: 18. 1933. ISSN 0161-7370.
  52. ^ Bernard Klassen "Electrically operated can opener" U.S. patent 2,789,345 26 March 1956.
  53. ^ Walter H. Bodle "Can opening and knife sharpening device" U.S. patent 2,897,589 4 December 1956.
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