(This post was last modified: 03-14-2018, 09:43 PM by Mickey ObermanSfZ2h8UM.)
Perhaps this will clarify its construction and the difficulty a loop would pose.
The upper left most picture shows it well. The band is wound around itself - see bottom right, second last photo - and fed to a spool which takes the used band.
[Image: IMGP8495.jpg]
Mickey
The upper left most picture shows it well. The band is wound around itself - see bottom right, second last photo - and fed to a spool which takes the used band.
[Image: IMGP8495.jpg]
Mickey