WALTER TISCHUK
Engineers in Richmond, IN

4262514, Apr 21, 1981

Oct 22, 1979

6/087445

Norbert C. Howell - Connersville IN
Walter Tischuk - Richmond IN

H. H. Robertson Company - Pittsburgh PA

B21D 2200

72 55

Apparatus for bending a laminated panel about at least one intended bend line extending parallel with the bottom of a notch formed in the backing of the panel. The panel is retained in engagement with a forming edge which extends along and is at least coextensive with the bend line. The panel and the forming edge are supported spaced-apart from a base. A substantially air-impervious membrane covers the panel and cooperates with the base to provide a substantially closed chamber. Means is provided establishing a pressure within the chamber which is less than the pressure outside of the chamber, whereby the pressure outside of the chamber forces the panel to bend about the forming edge thereby to place the panel portions on opposite sides of the bend line in angular relation relative to each other. A method for bending laminated panels is disclosed.

4037377, Jul 26, 1977

Nov 3, 1970

5/086425

Norbert C. Howell - Connersville IN
Walter Tischuk - Richmond IN
Thomas M. Welsh - Connersville IN

H. H. Robertson Company - Pittsburgh PA

E04C 110, E04C 220

523099

A double-skin construction panel having its outer skin spaced-apart from its inner skin. The panels are adapted to be assembled without exposed fasteners. A positive mechanical connection between the outer skin and the foamed-in-place panel core is provided. The panels have mating elements in the outer skin to provide for positive mechanical engagement of adjacent outer sheets when the panels are assembled in use.