Device for applying thermoplastic foil on edge of thin packaging material web has electrical heating arrangement with electrical resistance, having maximum temperature coefficient at fixed temperature

摘要

The device (1) has a packaging material feed (8) for feeding packaging material web. An electrical heating arrangement (10) is arranged between the foil feed (9) and connecting arrangement (11). The heating arrangement has an upper heating section with upper foil area and a bottom heating section with bottom foil area, which comes into contact in operating condition. The heating arrangement has an electrical resistance R, having maximum temperature coefficient at fixed temperature Tc. The heating arrangement has a core of PTC-ceramic.