Security caps

Heat Treatment Heating of both 5 g- and 350 g-samples were studied. In the case of the 5 g-samples, the oil was placed in 225 mL round bottomed flasks which were either securely capped or left open. Surface-to-volume ratio for these samples was 22.6/cm. In case of the 350 g-samples, the oil was placed in 1 L stainless-steel beakers with internal diameters of 10.0 cm, providing a surface-to-volume ratio of 0.9/cm. Heating was conducted in a silicone oil bath, maintained at 185 2 C. 

Keep all chemicals away from children and pets. If necessary, lock the chemicals up. Label and date all bottles of mixed solutions. Do not use drink or food bottles for darkroom solutions that are not clearly relabeled. Be sure storage bottles have a secure cap. Protect all chemicals from air, heat, light, moisture, and contamination from other chemicals. 

One-inch-thick layers of hydrated nickel chloride are arranged in open Pyrex ovenware dishes which are then stored for 17 hours at 80° in a circulating air oven, continuously purged with dry air. The resultant yellow hygroscopic nickel(II) chloride dihydrate is pulverized in a Waring Blendor and then transferred promptly to securely capped jars. The water content (Karl Fischer titration) varies from 1.88 to 2.2 hydrate. 

Waste Disposal. The general rule for waste disposal is that only dilute inorganic solutions and a few benign organic chemicals such as alcohol and acetic acid can be put down the drain. Materials such as organic solvents, concentrated acids and alkalis, or toxic chemicals (cyanides, arsenic, lead, and heavy-metal componnds) must be put into proper containers, securely capped and labeled, for disposal by the safety office. 

Waste containers should be clearly and securely labeled as to their contents and securely capped when not in immediate use. 

Figure 7.29 shows the material transferred to the individual machines by individual material lines. The alternate method would be to utilize common material lines. With common lines, you have one line per material source rather than one per use point. The common line is fitted with Y laterals at each use point, and they are selectively connected to the vacuum hoppers. The Ys not in use must be securely capped or the vacuum will be lost through the openings. One advantage to a common material line system is the fact that each line is always dedi-... 

Security cap before fitment showing hinges (HH) and gates (arrows). 

FIGURE 9.12 Security caps for electronic counting systems (graphics courtesy of HARTING Mitronics)... 

Detecting a drill with a diameter of 200 pm calls for a closely meshed conductor network with a pitch of 300 pm (150 pm conductor width and 150 pm center-to-center distance). PBT was chosen as the material because the heat-resistance requirements for these security caps are relatively low. Contacting is by conductive rubber strips ... 

The big advantages of MID security caps over conventional solutions (glued flex-print films) are very easy installation and the avoidance of quality problems in the field, often the result of failure of the adhesive. Production volume is high, so the product can be manufactured economically on frame carriers. The process parameters have to be closely monitored because the resistance range acceptable for the conductors is very closely toleranced. 

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