A device for imparting tension to a filament.

摘要

A device for holding a reel (14) of filament (9) such as of fine copper wire which device also imparts tension to the filament as the filament is drawn from the reel. The device has a holder (10) for the reel (14) and a pair of tensioning elements (18,21) one of which (18) is mounted on an end cheek of the reel and the other of which (21) is mounted on the holder (10). The tensioning elements interfit to define a non-linear passage through which the filament passes generally, radially inwardly towards and out of a central aperture (27), whereby the zig-zag path the filament is constrained to follow imparts tension to the filament. Since the filament may enter the passage at any point in the 360 DEG arcuate width thereof, localised wear is eliminated.