(under the class definition) Roll in which the outer surface of the roll is supported radially by a mechanical spring or springs.
(1) Note. This subclass includes a coil spring acting radially, the axis of the spring being disposed either
radially or axially of the roll. It also includes a leaf spring acting radially of the roll and the cantilever being disposed either circumferentially or axially of the roll. It also includes a coil spring which is wound around the core so that the axis of the spring is helical axially of the roll.
(2) Note. The spring layer is usually intermediate a central shaft and a surface cover so that the cover is resiliently or yieldingly supported. For a cover yieldingly supported, see this class, subclasses 4+ for a roll in which resilience is afforded by a fluid under pressure and subclasses 49+ for a roll in which a solid resilient layer as of rubber underlies a cover layer.
SEE OR SEARCH THIS CLASS, SUBCLASS:
4+, see (2) Note, above.
49+, see (2) Note, above.
SEE OR SEARCH CLASS 15, Brushing, Scrubbing, and General Cleaning,
165, for a brush or broom which is collapsible for entrance through a narrow mouth of hollow ware and expansible after entrance and subclass 213 for a rotary wiper or polisher of like nature.
152, Resilient Tires and Wheels.
295, Railway Wheels and Axles,
14, for a wheel of cooperation with a rail, which wheel includes a metallic spring tire cushion.
