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A Ziploc-branded storage bag Close-up from a cross section of the sealing mechanism. A zipper storage bag, slider storage bag, zipper bag, ziplock bag, zip-lock bag, ziploc bag, or zippie is an inexpensive flexible rectangular storage bag, usually transparent, made of polyethylene [1] [2] or similar plastic, that can be sealed and opened many times, either by a slider, which works in a similar ...
A coil zipper with its slider removed. Coil zippers now form the bulk of sales of zippers worldwide. The slider runs on two coils on each side; the teeth are formed by the windings of the coils. Two basic types of coils are used: one with coils in spiral form, usually with a cord running inside the coils; the other with coils in ladder form ...
Drawing of 1917 slide fastener patent filing. Talon was the first slide fastener, a/k/a zipper, manufacturing company. It was founded in 1893 as the Universal Fastener Company, manufacturing hookless fasteners for shoes. In 1913 it moved to Meadville, Pennsylvania, becoming the first manufacturer of zippers. The company flourished through the ...
Chipseal (also chip seal or chip and seal or spray seal) is a pavement surface treatment that combines one or more layers of asphalt with one or more layers of fine aggregate. In the United States, chipseals are typically used on rural roads carrying lower traffic volumes, and the process is often referred to as asphaltic surface treatment .
Weatherstripping around openings – especially doors and windows – is used in buildings to keep out weather, increase interior comfort, lower utility bills, [2] and reduce noise. Builder weatherstripping can be made from felt; [ 3 ] vinyl, rubber, or poly foam; [ 2 ] [ 3 ] EPDM cellular rubber and vinyl tubing; [ 4 ] and metals such as brass ...
A slider-crank linkage is a four-link mechanism with three revolute joints and one prismatic (sliding) joint. [1] The rotation of the crank drives the linear movement of the slider, or the expansion of gases against a sliding piston in a cylinder can drive the rotation of the crank. There are two types of slider-cranks: in-line and offset.
The bottom and sides are heat-sealed together to form the pouch, and the product is loaded from the top. The pouch with the loaded product then advances downwards; the top is sealed and the pouch is cut off. The sealing of the top of the pouch forms the bottom of the next pouch. During this process a tear notch may be punched.
A sliding door is a type of door that is mounted on or suspended from a track for the door to slide, usually horizontally and outside. It is a feature predominantly found in minibuses, buses, minivans and vans , so as to allow a large unobstructed access to the interior for loading and unloading of passengers or cargo without the doors ...