Device for manufacturing thread sewn book blocks

摘要

u The cross-section of the needle (1) is multi-edged, and it~s front section may have a point (2) and have, at least in the puncturing direction~s rear end, a multi-edged cross-section. The cross-sections of the needle may be triangular or star-shaped, whilst the free end of the needle may have a longitudinal central axis (5).