guards

Preferred label: 

Narrow strips of paper or parchment folded lengthways either to reinforce the folds of gatherings or endleaves (sewing guards) or to attach plates or tables to a textblock (extension guards).

AAT

The Arts and Architecture Thesaurus Online, The Getty Research Institute.

Additional reference: 
http://vocab.getty.edu/aat/300248893 (modified)
Hierarchy: 
Broader concept: 
Broader partitive concept: 
Top concept: 
objects