A pig tail spring exhaust hanger includes a pig tail coil having at one end an upper arm and at the other end a lower arm. The aim of the invention is to take measures to counteract the high temperatures in the meniscus region using appropriate embodiments of the copper plates andor the steel charging plates. The present invention also relates to the use of these compositions such as thickeners, dispersants, plastics additives, adhesives, coatings, flexographic inks, overprint varnishes, and dry cement powder modifiers. The memory cell is erased by increasing the net positive charge on the memory cell and programmed by increasing the net negative charge on the memory cell.