Yes, the tool can join two filaments to make one.
Here are some pictures
1) welded filaments
2) printed parts with welded filaments
Go see if my website videos of EasyWelder tool.
www.i3dinno.com

Are-you part of a group handyman?
Can you hear their views?
fils soudés.jpgsoudure 1.jpgpiece multi color.jpg

thank you