Abstract: A light alloy wheel for a vehicle comprising a disc portion comprising a hub portion and a design portion and a rim portion, the design portion having as-die-cast spoke portions having a taper angle of less than 5.0°. This wheel can be produced by using a casting apparatus comprising a die assembly comprising at least a stationary lower die and a movable upper die, a movable platen to which the upper die is fixed, a first cylinder and at least three synchronous second cylinders mounted onto a frame of the apparatus for moving the movable platen; driving the first cylinder to slowly reduce the clamping force of the lower die and the upper die; synchronously driving the second cylinders to elevate the movable platen in parallel from a position at which the lower die and the upper die are clamped to a position at which the wheel would not impinge on the lower die even if the movable platen were slanted; and then further elevating the movable platen by the first cylinder.

Abstract: An interface circuit transmits a digital data signal from a transmission unit to a reception unit via a coupling device. The interface circuit includes a device removing jitter components from the digital data signal. The interface circuit also includes a device removing high frequency noise components from the digital data signal. The jitter removing device and the noise removing device may be disposed in either of the transmission unit and the reception unit.