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Roll shutters on windows. Security roller shutters in a dead mall. A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open ...
The curtain is then rolled onto an axle which is covered by a housing. Rolling shutters can be operated manually by gear, by pull strap or can be motorized independently or in conjunction with a manual override. Motorized shutters can be operated by either a switch or remote and can be controlled either individually or in groups.
The prototype SL2000 was first exhibited at photokina '76, featuring both aperture- and shutter-priority autoexposure modes along with a top speed of 1 ⁄ 2000 sec. [1] However, when it was released in February 1981 for Germany and selected other European countries, the shutter-priority mode had been dropped and the top speed reduced to 1 ⁄ 1000 sec. [2] Rollei's bankruptcy later that year ...
High Speed Doors are an evolution of the traditional roller shutter door (hence the alternative name they are often given of Rapid Roll Doors). They are primarily designed to give higher operating speeds, improved sealing and sustain a higher number of opening & closing cycles than traditional roller shutters, without compromising reliability ...
A typical single-car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Oversized roller doors in commercial premises are not sprung (except in the US), and a manual pulley and chain system or a geared motor is used to raise and lower (roll up and roll down) the door.
Severe thunderstorms are likely in parts of the South through this weekend, during the busy holiday travel season. This may include tornadoes, damaging straight-line winds, large hail and heavy ...
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