The D-Form is a novel three dimensional shape invented by Tony Wills. The picture above is of a D-Form being made from paper.
Anthony Wills
PRODUCT DESIGNER AND D-FORM INVENTOR
Tony Wills is the inventor of the D-Form, a novel three dimensional shape which can be made by joining together around their edges any two dimensional shapes having the same perimeter. Particularly pleasing D-Forms can be created by joining around their edges two identical but displaced ellipses. Tony Wills obtained his postgraduate degree from the furniture design department of the Royal College of Art. He, and fellow RCA alumnus Brian Watson co-founded the London-based product design consultancy Wills Watson and Associates. Their main fields of activity are architectural products, contract furniture, and medical devices.