Pneumatic presses with configured press chamber and membrane and methods of using the same

A method of pressure bonding footwear, the method comprising:

• suctioning, with a pressure source, a press chamber in a press with a pressure source to draw a press membrane to an internal surface of the press chamber and open the press membrane to outside the press, wherein the press membrane is elastic, and wherein the inserting includes maneuvering the footwear article into the press membrane without throwing or losing contact with the footwear article;
• inserting a footwear article into the press membrane, wherein the press chamber has an internal surface of a shape matching the footwear article,
• releasing the press chamber to neutral pressure, wherein the press membrane at the neutral pressure has the shape of the footwear article that matches and is smaller than the press chamber so as to not be in contact with the internal surface of the press chamber, and wherein the releasing causes the press membrane to be in uniform contact with the footwear article and partially bond the footwear article;
• pressurizing, with the pressure source, the press chamber to compress the press membrane uniformly to the footwear article to close the opening and bond the footwear article, wherein the footwear article is in a shape of the human foot and smaller than the press chamber, wherein the footwear article includes a sole and top portion connected by glue that bonds the sole and top portion during the pressurizing;
• suctioning, with the pressure source, the press chamber to neutral pressure to draw the press membrane to the internal surface of the press chamber and open the press membrane to outside the press;
• and
• withdrawing the bonded footwear article.