Flexible blades

Fig. 4. The effect of blade loading on the wet-coating thickness in flexible blade coating where ( ) represents a less stiff blade (B) represents a stiffer...

In the rod-blade coater unit a rod is mounted at the end of the blade. This coater behaves more like the beveled blade coater than a flexible blade... 

Two-BIa.de Coaters. In order to coat both sides of a web simultaneously, two flexible blade coaters can be used back-to-back, ie, with both blades pressing against each other and the web between them. The web usually travels vertically upward. Different coatings can be appHed on each side of the web. The blades tend to be thinner and more flexible than the standard blades and the angle to the web is lower. The web has to have sufficient tensile strength to be pulled through the nip. 

Simultaneous coatings can also be made with one flexible blade against a roU, where the web moves downward and suppHes the coating fluid with puddles and edge dams between the web and the blade and between the web and the roU. The roU may rotate faster than the web. Figure 5 shows a version where the fluid on the roU side is suppHed by a transfer roU. 

Figure 6.18 Micro Force Balance (A) stage, (B) and (C) micromanipulators, (D) objective, (E) temperature controller device, (F) flexible blade, (G) travelling platform, (FT) travel piezo adjuster, (/) and (L) LVDT after Pratola etal., 2000)...

Where a flush door sill is required, the gaskets on the lower edge will he in the form of two or three flexible blades which just brush the floor. 

Piezoelectric fans are small, low-power, relatively low-noise, solid-state devices that provide viable thermal management solutions for a variety of portable electronic appliances, including laptop computers and cellular phones. In these fans piezoceramic patches are bonded onto thin, low-frequency flexible blades driven at resonance frequency, thereby creating an air stream directed at the electronics components. Thereby, up to 100% improvement over natural convective heat transfer can be achieved (Acikalin et al. 2004). 

GEA-Wiegand, Ettlingen. RFB Rotor with flexible blades... 

Squeegee A soft, flexible blade or roller used in wiping operations, particularly in screen printing and lay-up molding. 

Flexible - this type of blade is also made from high-speed steel, but with only the teeth hardened. This results in a flexible blade with hard teeth which is virtually unbreakable and can therefore be used by the less experienced user or when sawing in an awkward position. The blade life is reduced due to the problem of fully hardening the teeth only. 

Drying Lines. Oven drying lines represent large capital investments, of the order of several million dollars, and the same line is frequently used to handle both solutions and latices. The metering equipment may be either reverse roll coaters, which offer maximum flexibility, or knife-over-roll coaters, which are less expensive. For thin films a wire-wound rod to remove excess material can be used. Because of coating difficulties encountered with latex vehicles such devices as an air knife or flexible blade are sometimes used with these products. 

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