Every so often, we get a discussion about Abrafile, and similar, tension blades for hacksaws:
**LINK**
https://www.model-engineer.co.uk/forums/searchresults.asp?Search=abrafile&t=0
This page gives some history of the Spyral blade, which is currently manufactured in the USA, by Bestway Products: **LINK**
https://www.bestwayproductscompany.com
The Spyral saw blade was first manufactured by Tyler Manufacturing which started in 1946. …
Interestingly [?] : Today I purchased three Tyler Spiral [note the spelling] blades and a pair of adapters, in a blue sleeve … images to follow.
I suspect that these pre-date the Spyral ones, which are usually seen in a yellow sleeve.
Any memories ??
MichaelG.
.
Edit: Here’s the patent for the manufacturing machine:
https://worldwide.espacenet.com/patent/search?q=pn%3DGB659356A
Edited By Michael Gilligan on 05/09/2020 18:53:58