An idea for easy plastic sealing

After having experiemented with various methods for heatsealing two pieces of plastic together I have realized the most obvious: Your fingers will always be the best tools. Pinching the two pieces together between your index and tumb, while applying heat and running the area that needs sealing through your fingers would be easy, intuitive, and extremely flexible way of working with plastic materials. If you could invent a glove like the one pictures on the right, but with heating instead of sensors, it would be a quite useful invention. That is just an idea (transfered to the "Ideas" section).