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A window screen (also known as insect screen, bug screen, fly screen, flywire, wire mesh, or window net) is designed to cover the opening of a window. It is usually a mesh made of metal, fibreglass , plastic wire, or other pieces of plastic and stretched in a frame of wood or metal.
The welded wire mesh is a metal wire screen that is made up of low carbon steel wire or stainless steel wire. It is available in various sizes and shapes. It is widely used in agricultural, industrial, transportation, horticultural and food procuring sectors. It is also used in mines, gardening, machine protection and other decorations.
A plastic mesh may be extruded, oriented, expanded, woven [1] or tubular.It can be made from polypropylene, polyethylene, nylon, PVC or PTFE.; A metal mesh may be woven, [2] knitted, welded, expanded, sintered, [3] photo-chemically etched or electroformed (screen filter) from steel or other metals.
The door of a microwave oven has a screen built into the window. From the perspective of microwaves (with wavelengths of 12 cm) this screen finishes a Faraday cage formed by the oven's metal housing. Visible light, with wavelengths ranging between 400 nm and 700 nm, passes easily through the screen holes.
The process of perforating metal sheets has been practiced for over 150 years. In the late 19th century, metal screens were used as an efficient means of separating coal. The first perforators were laborers who would manually punch individual holes into the metal sheet. This proved to be an inefficient and inconsistent method which led to the ...
where a = aperture, b = mesh count and c = wire diameter. 2 mesh with an intermediate crimp. Other calculations regarding woven wire cloth/mesh can be made including weight and open area determination. [18] Of note, wire diameters are often referred to by their standard wire gauge (swg); e.g. a 1.6mm wire is a 16 swg. Traditionally, screen ...