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Open-ended zippers use a box and pin mechanism to lock the two sides of the zipper into place, often in jackets. Open-ended zippers can be of any of the above described types. Two way open-ended zippers have a puller on each end of the zipper tape instead of having an insertion pin and pin box at the bottom. Someone wearing a garment with this ...
The Interstate Bridge (also Columbia River Interstate Bridge, I-5 Bridge, Portland-Vancouver Interstate Bridge, Vancouver-Portland Bridge) is a pair of nearly identical steel vertical-lift, Parker through-truss bridges that carry Interstate 5 traffic over the Columbia River between Vancouver, Washington and Portland, Oregon in the United States.
A major technological change came in 1950, when the company purchased a chain machine from the U.S. that allowed the automation of the zipper making process. Previously, YKK zippers were made by hand, and hence had an inferior quality compared to automated zippers from abroad. In March 1951, YKK relocated its headquarters to Chūō, Tokyo.
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The foot treadle used since the Middle Ages, [11] used to convert reciprocating to rotary motion, was adapted to drive the sewing machine, leaving both hands free. When Howe learned of Singer's machine he took him to court, where Howe won and Singer was forced to pay a lump sum for all machines already produced.
The Zipper was created by Joseph Brown under Chance Rides in 1968 in Wichita, Kansas, and registered under patent 3,596,905 in 1971. [6] The ride's basic design was based on an earlier ride called The Swooper, invented in 1928, which also featured a series of cars being pulled along a cable around an oblong framework. [6]