Elo TouchSystems IntelliTouch SecureTouch Proper placement of adhesive tape to the touchscreen

Use two layers of the double-sided adhesive tape to achieve a total thickness of 1/16-inch (2 mm). While specific touchscreen and CRT combinations may allow the use of thinner materials, 1/16-inch (2 mm) is generally necessary to allow for variations in ROC between the two glass surfaces. Review the fit between the touchscreen and the CRT before applying the tape. If one pair of opposite edges has a closer fit than the other, put the adhesive tape on the edges of the touchscreen with the better fit. See Figure 2.4 on page 19 for typical placement. You want the sealing tape on the rear of the touchscreen so it can’t be seen in the viewable area once reassembled. If there is a good fit on all four edges, you may want to use double-sided adhesive tape on all four edges. When doing this, move the adhesive tape in slightly on one pair of edges and add foam sealing tape outside these two edges. The thicker foam tape will keep the adhesive tape away from the CRT until you are ready to adhere the touchscreen to the display.

Figure 2.4 Proper placement of adhesive tape to the touchscreen.

In general, the adhesive tape should be set back slightly from the edge of the active area of the touchscreen. The adhesive tape should be attached to the glass. When the display is reassembled, the mounting tape should not be visible. Do not remove the liner from the exposed side of the adhesive tape yet.

Cut and place the foam sealing tape on the back of the touchscreen to form a dust seal as shown in Figure on page 31. This seal is particularly important because the CRT is a good electrostatic precipitator and will attract dust. The adhesive tape and foam sealing tape should form a complete seal around the touchscreen. Do not leave any gaps. The sealing tape should not be visible when the display is reassembled.

Practice aligning the touchscreen on the CRT without removing the adhesive tape liner. The installation can tolerate some horizontal and vertical shift. However, rotational skew between the touchscreen and display axes cannot be easily compensated for in the video alignment, and will also interfere with proper mounting of the tube in the bezel.

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