The springy nozzle has a low-ish thermal mass but more usefully and is a poorer conductor than an equivalent solid tube. This reduces the length of metal gas pipe needed before you are cool enough not to melt the plastic.
You find springy handles on oven doors and steam valves from a certain era too, and the idea is the same, running cooler.
The springy nozzle has a low-ish thermal mass but more usefully and is a poorer conductor than an equivalent solid tube. This reduces the length of metal gas pipe needed before you are cool enough not to melt the plastic.
You find springy handles on oven doors and steam valves from a certain era too, and the idea is the same, running cooler.
