Insert open-hole

Figure 11-73. During molding, any loose steel inserts falling into the molds will damage their cavities, but brass or soft metals like aluminum will usually crush, with minimal or no damage to the mold. The flow of plastic into the interior of an insert is impeded by using a blind-hole insert and a shoulder (about x in.) around the insert opening.

To activate the delay, first fasten the container securely in an upright position. Make a hole in the side of the container near the bottom and insert the open end of a nonelectric blasting cap. Be sure that some of the sugar-chlorate mix gets into the open end of the cap. The business end of the blasting cap can be inserted directly into the explosive charge or connected to the charge with primacord. To start the delay, carefully place a spoonful of concentrated acid in the pocket of the membrane—... 

Two in vivo microdialysis techniques are employed in the clinical setting open and closed, which refer to the degree of exposure of the brain (Kanthan and Shuaib, 1995). In the open technique, a craniotomy is performed to expose the brain and the microdialysis probe is then implanted into the brain region of interest. In the closed technique, a burr hole is made in the skull and a modified probe is then inserted into the brain via the burr hole. The closed technique permits multiple insertions of the dialysis probe into the brain tissue and consequently minimizes problems associated with prolonged probe placement, such as edema and gliosis (Kochs, 1997). Therefore, the closed technique allows for continuous but intermittent sampling and has lower risks of tissue damage and infection than the open method (Kanthan and Shuaib, 1995). 

The most inexpensive and simplest system is the glove bag, which is basically a plastic bag open at one end with glove inserts. The materials to be used are placed in the bag in the collapsed condition. Holes are cut in the plastic for making electrical connections and so on, and then sealed with tape or other suitable material. The bag is then purged with inert gas for several minutes and the open end is sealed with the gas continuing to flow. 

---