Crimped strips can be used in paper quilling along with regular strips to add special effects and freshness to your projects. A crimper is a device that consists of two cogs, which a quilling strip is run through. The cogs must be wide enough to cover the width of a strip. A crimper can be purchased in one of quilling supplies shops, but for some of you (like for me) that's not possible. After looking for suitable cogs to make a DIY crimper for quilling strips, I've finally got it and wanted to share with you my solution.
It turns out that almost any (I'm sure) printer has exactly what I needed. These days a lot of old office equipment is thrown away, so finding one you can took apart shouldn't be a problem. Look at the photo, these are the crimpers I was able to build out of only one printer. The white crimper is made of two cogs mounted with screws on a plastic board. It can easily crimp 3/8'' (1cm) paper. The black crimpers are intact blocks of the printer, I even didn't have to change anything. The cogs are pretty thin, though, but they still can be used with 1/8'' (3mm) strips.
I hope you find this information useful. Happy quilling!