Apparatus or corresponding method for winding, unwinding, guiding, or tensioning elongated material in which particular significance is attributed to structure or treatment of a surface to enhance support of an element or reduce friction normally inherent to movement of such an element.
SEE OR SEARCH CLASS
184, Lubrication, appropriate subclasses for lubrication of general and numerous special uses.
384, Bearings, appropriate subclasses for bearings of general and numerous special uses.
