Staples come in long stuck-together stacks. Are the staples glued together or is it one long piece of metal perforated almost all the way through?
I broke out my staples. Looks like glue to me.
My guess is that a flat metal piece is scored almost all the way through, like those easy open cans, and then bent in two places to form the staple shape.
Check this video out. Skip ahead to about 5:00 for staples.
I’ve shot tens of thousands of staples out of pneumatic air guns. They are definitely bound by an adhesive.
Since the poster above didn’t state what was in the video,
long thin wires are aligned side by side and glued together. then cut and formed.