Abstract: The specification discloses a removable denture retaining structure in which an elastic mounting member is provided between a denture body and an support base.This structure can obviate all problems of the prior art, i.e. many parts are required, skilled technique is also required to produce, mount and dismount the denture body, and looseness and breakage due to fatigue are apt to occur.Furthermore, the invention is advantageous because the structure can provide patients with comfortable feeling during use.

Abstract: A method of manufacturing a die for embossing a desired circuit pattern of a metal foil onto a substrate comprises steps of forming, on the work surface of die material, a first circuit-coating pattern corresponding to the contour of the desired circuit pattern and a second circuit-coating pattern large enough to cover the first circuit-coating pattern and larger than the desired circuit pattern. The die material surface uncovered by the second circuit-coating pattern is partly etched away to leave a grooving for receiving the embossed metal foil. Then, the second circuit-coating pattern is stripped away, and the uncovered metal portion surrounded by the first circuit-coating pattern is suitably removed, and finally the first coating pattern is stripped away.

Abstract: A method of manufacturing laminated buses begins with a step of preparing a number of perforated sheets, each comprising a number of parallel conductor elements each of which has terminals formed at desired intervals along its length, ribs connecting the conductor elements to one another widthwise, and an outer frame connected to the connecting ribs and surrounding and integrally holding all of the conductor elements. Next, one of the perforated sheets is held at its outer frame by a jig, and an insulating material is temporarily bonded to the individual conductor elements as well as to the outer frame. The procedure is repeated until another perforated sheet and another insulating material are alternately laminated over the aforesaid insulating material. In or before the final step of finishing, all of the connecting ribs are trimmed off from the conductor elements and the resulting laminates are pressed to a desired shape.