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Patent: 3,640,010
Issued: Feb. 8, 1972
Inventors: Murray Altman, Valley Stream, NY; Mordecai R. Craig, Demarest, NY, and Irwin H. Block, New York.
Assignee: The Purdue Frederick Company
   This invention is a shipping carton whose cover may be separated from the base and erected as a self-supporting display panel to allow product exhibition in the opened carton.

Patent No. 3,638,664
Issued: Feb. 1, 1972
Inventor: Jerry Cohn, New York, NY

Patent: 3,631,820
Issued: Jan. 4, 1972
Inventor: Russell E. Taber, Atlanta, GA
   A structure for displaying stacked merchandise includes a shelf or separator of more or less rigid material which is flexibly hinged by a unique spring to a back panel in such a way that that the shelf or separator will stabilize the layers of merchandise. Because of the flexible spring hinge, the shelf or separator will automatically seek a vertical position when all merchandise is removed. The device works in the following manner.