(under subclass 190) Device including a roll* having uneven surface characteristics which (1) increase the coefficient of friction between the surface and the material, or, (2) has other means on the surface to hold and grip the material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
52+, for a device comprising a modified material engaging surface which engages modifications in material.
SEE OR SEARCH CLASS
19, Textiles: Fiber Preparation,
258+, for the surface structure of a drawing roll for fiber-containing structures, such as slivers.
474, Endless Belt Power Transmission Systems or Components, appropriate subclasses for pulleys having surfaces for increasing frictional grip, and for pulleys with auxiliary gripping means.
