Apparatus for deforming corrugated fiberboard
 Apparatus for inelastically deforming an initially flat blank of a corrugated fiberboard, comprising two die blocks movable relative to each other and having complementarily convex and concave pressing surfaces and blank retaining means adapted to clamp opposite marginal portions of a blank of a corrugated fiberboard being warped between the die blocks with the marginal portions urged sidewise inboardly of the die blocks, the blank retaining means being operative to restrain the blank from being moved in a direction parallel with the marginal portions but to allow the marginal portion of the blank to move the marginal portions of the blank sidewise inboardly of the die blocks in a direction perpendicular to the marginal portions so that not only production of creases in curved portions of the blank but production of fissures as would be caused if the blank is excessively stretched between the opposite marginal portions of the blank are precluded. 
Nissan Motor Company, Limited
B B Y B B B B B B B B B B B B B E
B29C B32B Y10S B29K B32B B32B B31F B32B B32B B32B B32B B29C B32B B32B B32B B29C E04C
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Toshihiko
Fujii