Abstract: A method of bending round tubular metal stock for use in the manufacture of tubular frame furniture comprising the steps of first bending the stock to a shape close to the final angle and thereafter compressing the stock in a direction perpendicular to the plane of the bend so as to fractionally increase the stock diameter in the plane of the bend and reversely bend the stock so as to achieve the final angular relation.
Abstract: A one-piece shell for chairs made of a semi-rigid structural material. A plurality of parallel slots in the shell extend rearwardly from the seat section across the transition section and up the back section to form parallel ribs from the rear of the seat section into the back section. The ribs are corrugated to enable them to expand and twist individually to change the contours of the shell to accommodate different body shapes and movements.
Type:
Grant
Filed:
July 27, 1988
Date of Patent:
January 9, 1990
Assignee:
Chromcraft Furniture Corp.
Inventors:
Ernest A. Pittman, Edward R. Dandridge, Robert L. Wilson