Card-shaped recording medium
专利汇可以提供Card-shaped recording medium专利检索，专利查询，专利分析的服务。并且PURPOSE: To enable convenient identification in adaptation to a case of rotating the medium by providing marks for identifying the medium respectively to the positions symmetrical with the axis of rotation of the medium or the axis running the center of the medium and parallel with the axis of rotation.
CONSTITUTION: The recording medium (optical card 1) is provided with a central hole 2 of rotation and an information recording region 3 in a rectangular substrate of a wallet size. The identification marks 4a, 4b for identifying the medium are respectively provided to the positions symmetrical with the axis of rotation of the optical card 1. Respective kinds of the identification marks 4a, 4b are arrayed in one row and consist of, for example, 4 pieces of holes. The optical card 1 is guided from a card insertion port 5 into a device by an introducing roller 6 and the identification mark 4a is detected by a photointerruptor array 7 provided to the position corresponding to the identification mark in the device. The optical card is thereby identified even when the card is inserted to the device from any side.
COPYRIGHT: (C)1989,JPO&Japio，下面是Card-shaped recording medium专利的具体信息内容。
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