Not too long ago we were celebrating our success with fixing a spiral binding. Our reward is that several more have crept in to the fixit pile!
Tonight I found this article:Spiral Bindings in a Hard Cover: An Alternative to Rebinding – by William Minter. You can find the article at http://www.srmarchivists.org/resources/preservation/preservation-publications/spiral-binding-in-a-hard-cover-an-alternative-to-rebinding/, Archival Products NEWS Volume 5, No.1, page three.
This article would not have changed how we fixed our problem book, but it may be a way to protect the books we already have. I’m going to have to study the diagram when I have more brain space.