Printing curved-surface

Tubes and Perforated Tubes Electrodepositing nickel non-adherently all over the curved surface of a cylinder, and then sliding off the coating, produces a tubular nickel product. Some tubes manufactured in this way are plain, but most are perforated. They are used industrially for screen printing textiles, carpets and wall paper . 

Screen Printing Ink is applied to part through a finely woven screen. Screen is masked in areas that won t be painted. Economical means for decorating flat or curved surfaces, especially in relatively short runs. Screens, fixture, squeegee conveyorized press setup (for any kind of volume). Dryers Manual screen printing possible, for very low-volume items... 

Plastic part Non-contact accommodates curved surfaces. Improved print... 

A common application for elastomeric molds is for micro- or nanocontact printing, where a self-assembled monolayer (SAM) is placed on both planar and curved surfaces via contact with the reliefs on the mold (Figure 6.66). SAMs will be an important architecture for the next generation of nanostructured materials. 

Fig. 15.7 (a) Printed elastic conductors on a PDMS sheet. The insets show SWCNTs dispersed in paste and a micrograph of printed eiastic conductors (b) typicai SEM image of the eiastic conductor, in which finer or exfoliated SWCNTs are uniformly dispersed in the rubber and formed well-developed conducting networks ruid (c) a stretchable display that can be spread over arbitrary curved surfaces (Reproduced from Ref [109] with kind permission of Nature Publishing Group)... 

Of these traditional methods, ink printing is the most widely used. The primary benefits are the relatively low capital investment and the ability to print (pad print) on curved surfaces. The disadvantages to printing with ink are numerous and include ... 

One printing technique that will apply adhesive to such shapes is the screen. Silk screens have long been used to apply paste-type inks to flat surfaces and even to simple curved surfaces such as cans and bottles. Many of the paste-type structural adhesives can be suitably deposited in intricate flat shapes by this means. Rather than the conventional silk screens, however, screens made from fine stainless steel wire are more suitable. The thickness of the deposit is determined by the gauge of the wire. In other respects, the method is quite similar to silk screen printing. 

Diethyl phthalate Cellulose nitrate, printing transfer films for curved-surface printing (16), conductive composite (17), orthodontic adhesives (18)... 

T. Niwa, M. Ishikawa, and K. Nakamura, Curved-surface printing method applicable to member exposed to high-temperature closed atmosphere and lamp unit having same applied thereto, US Patent 6 408 743, assigned to Cubic Co., Ltd. (Shimizu, JP) Koito Manufacturing Co., Ltd. (Tokyo, JP), June 25,2002. 

Microcontact printing (pCP) is a technique that uses an elastomeric stamp with relief on its surface to generate patterned SAMs on the surface of both planar and curved substrates [87,88]. SAMs are highly ordered molecular assemblies that form spontaneously by chemisorption of functionalized long-chain molecules on the surfaces of appropriate substrates [79,89]. Well-established systems of SAMs include alkanethiolates on coinage metals (Au, Ag, Cu) [90] alkyl-siloxanes on hydroxyl-terminated surfaces (Si/Si02, glass) [91] carboxylic and... 

The data shown below, in Fig. 4.4, illustrate the richness of local information that can be extracted. On a micropattemed surface of organic molecules exposing hydrophobic -CH3 and hydrophilic -COOH groups at the film surface (prepared by microcontact printing [23]), the border region of the printed pattern was investigated in AFM-FV measurements. F-d curves were acquired pixel-per-pixel and provided information of local tip-surface interactions as shown in panels a and b. Here, the difference in pull-off force between the two chemically distinct regions and the tip is clearly pronounced. 

One can expect (see fine print further) that the greater diffusivity of the counter-ion layer as compared to that established in Helmholtz model, would only affect the velocity distribution profile of the displacement of individual fluid layers in the direct vicinity of the solid surface. The experimentally observed velocity of the mutual motion of the phases with respect to each other, v0, determined, as in Helmholtz model, by the potential change significantly (curve 2 approaches the same limiting value as curve 7 ). This is also confirmed by the fact that the distance between the capacitor plates, 8, which is the only parameter defining the geometry of the system in the Helmholtz model, is not present in the final expression.4 The thickness of the ionic atmosphere, k 1, may be used as the parameter closest to the distance 8, i.e. 8=1/k. 

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