https://hcie.csail.mit.edu/research/laserstacker/laserstacker.html
It is a way of welding the layers together by using a focus point down between the layers when it is being cut. Kind of interesting. They also have a technique for folding a layer back over the top of a hole too by cutting a thin line then using a defocused laser to melt the top down over the hole.
Wondering if anyone has seen this or tried it with the glowforge?
Thanks,
David.