(under subclass 293) Subject matter wherein the work-gripping instrumentality cooperates with another work-gripping instrumentality cooperates with another work-gripping instrumentality located at a fixed distance therefrom.
(1) Note. For original placement in this subclass, there must be structure to effect friction gripping engagement on significantly spaced portions of the same workpiece; e.g., adjacent two distinct edges of a sheet or at different points along the length of a rod, usually accompanied by a metal-deforming operation adjacent each clamped portion or between two clamped portions. One clamp may, however, have merely a steadying or stabilizing function.
(2) Note. Some "stretch formers" are found in this subclass; i.e., those in which the work clamps are relatively fixed during metal deformation. [figure] [caption]Relatively fixed clamps and actuated tool (subclass 305)
SEE OR SEARCH THIS CLASS, SUBCLASS:
295+, for method or machine employing plural relatively movable work clamps to deform work.
