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Duofold
The Parker Duofold is a range of fountain pens produced by the Parker Pen Company. History The first model was produced in 1921 and was a large pen – 5.5 inches long when capped. It was made of a showy bright red hard rubber and expensively priced at $7.00, . The original full-sized Duofold was soon joined by the smaller Duofold Junior, Duofold Special, and Lady Duofold. While the Junior and Special could also be fitted with Parker’s Washer Clip, the Lady Duofold was available with a Chatelaine, or Ring Top for hanging around one's neck. The Ring Top would also appear on Parker's Vest Pocket models, for being attached to a watch fob. Matching pencils would come with either clip or ring, depending on the pen selected. The pen was available only in black and red hard rubber until 1926, when Parker introduced the “unbreakable Permanite” Duofold (Permanite was Parker’s trade name for a plastic manufactured by DuPont DuPont de Nemours, Inc., commonly shortened to DuPont ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parker Pens
The Parker Pen Company is a French manufacturer of luxury writing pens, founded in 1888 by George Safford Parker in Janesville, Wisconsin, United States. In 2011 the Parker factory at Newhaven, East Sussex, England, was closed, and its production transferred to Nantes, France. History George Safford Parker, the founder, had previously been a sales agent for the John Holland Gold Pen Company. He received his first fountain pen related patent in 1889. In 1894 Parker received a patent on his "Lucky Curve" fountain pen feed, which was claimed to draw excess ink back into the pen barrel when the pen was not in use. The company's first successful pen, released in 1899, was the Parker Jointless. The Lucky Curve feed was used in various forms until 1928. From the 1920s to the 1960s, before the development of the ballpoint pen, Parker was either number one or number two in worldwide writing instrument sales. In 1931, Parker created Quink (quick drying ink), which eliminated the need ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parker Pen Company
The Parker Pen Company is a French manufacturer of luxury writing pens, founded in 1888 by George Safford Parker in Janesville, Wisconsin, United States. In 2011 the Parker factory at Newhaven, East Sussex, England, was closed, and its production transferred to Nantes, France. History George Safford Parker, the founder, had previously been a sales agent for the John Holland Gold Pen Company. He received his first fountain pen related patent in 1889. In 1894 Parker received a patent on his "Lucky Curve" fountain pen feed, which was claimed to draw excess ink back into the pen barrel when the pen was not in use. The company's first successful pen, released in 1899, was the Parker Jointless. The Lucky Curve feed was used in various forms until 1928. From the 1920s to the 1960s, before the development of the ballpoint pen, Parker was either number one or number two in worldwide writing instrument sales. In 1931, Parker created Quink (quick drying ink), which eliminated the need ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fountain Pen
A fountain pen is a writing instrument which uses a metal nib to apply a water-based ink to paper. It is distinguished from earlier dip pens by using an internal reservoir to hold ink, eliminating the need to repeatedly dip the pen in an inkwell during use. The pen draws ink from the reservoir through a feed to the nib and deposits the ink on paper via a combination of gravity and capillary action. Filling the reservoir with ink may be achieved manually, via the use of an eyedropper or syringe, or via an internal filling mechanism which creates suction (for example, through a piston mechanism) or a vacuum to transfer ink directly through the nib into the reservoir. Some pens employ removable reservoirs in the form of pre-filled ink cartridges. History Early prototypes of reservoir pens According to Qadi al-Nu'man al-Tamimi (d. 974) in his ''Kitab al-Majalis wa 'l-musayarat'', the Fatimid caliph Al-Mu'izz li-Din Allah in Arab Egypt demanded a pen that would not stain his h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parker Vacumatic
The The Parker Pen Company, Parker Vacumatic fountain pen was launched in 1932, and would come to out-sell the Parker Duofold, the then top seller. The pen was originally marketed under the name of Golden Arrow, a reference to the new arrow clip but was again changed to Vacuum Filler in reference to its ink reservoir filling action. The Vacumatic featured a brand new filling mechanism which took 5 years to develop at a cost of $125,000. Parker boasted the model to be the first self-filler without a sac; while this was not entirely true, the filling mechanism was still a great innovation. By using a diaphragm rather than a sac, the whole barrel can be used as a reservoir. The principle workings are essentially like that of the earlier button fillers like the Duofold as the depression of the plunger pushed on the rubber sac and forced out the air (creating a vacuum) and when the rubber regained its natural form the ink got sucked into the pen to replace the air. The difference was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ebonite
Ebonite is a brand name for a material generically known as hard rubber, and is obtained via vulcanizing natural rubber for prolonged periods. Ebonite may contain from 25% to 80% sulfur and linseed oil. Its name comes from its intended use as an artificial substitute for ebony wood. The material has also been called ''vulcanite'', although that name formally refers to the mineral vulcanite. Charles Goodyear's brother Nelson Goodyear experimented with the chemistry of ebonite composites. In 1851 he used zinc oxide as a filler. Hugh Silver was responsible for giving it its name. Properties The sulfur percentage and the applied temperatures and duration of vulcanizing are the main variables that determine the technical properties of the hard rubber polysulfide elastomer. The occurring reaction is basically addition of sulfur at the double bonds, forming intramolecular ring structures, so a large portion of the sulfur is highly cross-linked in the form of intramolecular addition. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DuPont
DuPont de Nemours, Inc., commonly shortened to DuPont, is an American multinational chemical company first formed in 1802 by French-American chemist and industrialist Éleuthère Irénée du Pont de Nemours. The company played a major role in the development of Delaware and first arose as a major supplier of gunpowder. DuPont developed many polymers such as Vespel, neoprene, nylon, Corian, Teflon, Mylar, Kapton, Kevlar, Zemdrain, M5 fiber, Nomex, Tyvek, Sorona, Corfam and Lycra in the 20th century, and its scientists developed many chemicals, most notably Freon (chlorofluorocarbons), for the refrigerant industry. It also developed synthetic pigments and paints including ChromaFlair. In 2015, DuPont and the Dow Chemical Company agreed to a reorganization plan in which the two companies would merge and split into three. As a merged entity, DuPont simultaneously acquired Dow and renamed itself to DowDuPont on August 31, 2017, and after 18 months spin off the merged entity' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radite
Radite is a trade name for an early plastic, formed of pyroxylin Nitrocellulose (also known as cellulose nitrate, flash paper, flash cotton, guncotton, pyroxylin and flash string, depending on form) is a highly flammable compound formed by nitrating cellulose through exposure to a mixture of nitric acid and ... - a partially nitrated cellulose - introduced by the Sheaffer Pen Company in the 1920s when plastics were first used as a material for pen manufacture. Plastics {{Tech-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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