News for hackers. Stuff that matters.

A comment on Letterlocking. Parent comment

Re:Letterlocking by Animats on Tuesday March 23, 2021 @10:13PM (#26562780)
There are crimp-type devices, and there are ones that cut a slot and tab. The slot and tab devices were patented in 1910. The main one was the "Bump Paper Fastener", which shows up on eBay now and then. So that's automatic letter-locking.

[1] https://pdfpiw.uspto.gov/.piw?docid=01065904&

[ Parent | on HN ]

There are no comments on this comment yet.