With complementary tool faces (e.g., for embossing):
(under subclass 412) Device wherein said tool-faces* have substantially equal areas and similar, but reversed, shapes or contours whereby they would be capable of substantially full surface contact (with allowance for the presence of uniform-thickness work therebetween), and including tool-faces which are complemental except for localized work-shape-conforming recesses or projections which have no disclosed deforming function.
(1) Note. Mating tool faces are regarded as complementary for this subclass even though one or both faces have recesses to receive projections on work, such as rivet heads or ribs, providing there is no deformation of work in these recesses.
(2) Note. The presence of mere work- positioning ribs, ledges, etc., on otherwise complementary tool-faces does not bar placement in this subclass.
(3) Note. Grooved pipe-bending dies, for example, are excluded from this subclass for it is evident that deformation takes place in the grooves (the work does not initially fit exactly in the grooves), and the grooves are not complementary.
(4) Note. A small tool-face may be complementary to an opposed portion of a large tool, anvil, etc., but the combination is barred from this subclass because of their dissimilar areas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
343+, for closed-die tool couple which may exhibit complementary faces. 394+, for opposed-face tool-complex which may exhibit complementary, sectional, tool-faces.
