.~.~ Frames movable toward each other in parallel relationship
DEFINITION
Classification: 211/201
(under subclass 195) Device wherein the framework included two or more framework sections, each of which sections includes article-supporting elements and element-connecting members lying in a common plane, which sections are disposed in parallel relationship one with another, that is, the planes in which the sections lie are equidistant one from another at all corresponding points, and which sections are connected one to another so as permit movement relative to each other while maintaining their parallel relationship.
