(under subclass 438) Device which incorporates either (a) an idler roller (or roller-carried band) engageable with passing work, or (b) a guide element which is biased toward a predetermined location by a counterweight or springlike means (either solid or fluid), so that the element may be pushed back by random lateral displacements of passing work but tends to return toward its initial position.
(1) Note. There is usually, but not necessarily, another
element, such as a guide or a work-supporting surface, opposed to the movable or yieldable guide element. Such other element may, but need not, be movable or yieldable.
SEE OR SEARCH THIS CLASS, SUBCLASS:
422, for yieldable means to press work to a work-mover.
