Philadelphia patent-back guard
A heavy cloth guard to which a folio of a large
blankbook is sewn before being sewn to webbings.
It is used mainly where the sewing must have
greater flexibility than that afforded by sewing
on webbings alone. It also contributes
considerably to the strength of the sewing.
all CoOL documents]
Timestamp: Saturday, 19-Nov-2011 13:18:43 PST
Retrieved: Sunday, 24-Mar-2019 04:37:07 GMT