Abstract: A first member and a second member are coupled so as to form a flat card path therebetween. The card path is open at one end of each of the first and second members. A plurality of guide holes are formed in the first member so as to open to the card path. The guide holes are substantially perpendicular to the card path. A plurality of light-emitting elements are respectively mounted in the guide holes such that a light-emitting direction of each light-emitting element crosses the card path. A plurality of photodetector chambers are formed in the second member such that each photodetector has an optical axis aligned with that of each light-emitting element. A plurality of light-receiving elements are housed in the photodetector chambers so as to receive only light beams having a predetermined wavelength through respective filters. An information card having pattern data formed by a fluophor thereon is inserted along the card path, thereby allowing reading of the pattern data by the light-receiving elements.

Abstract: A magnetic card reader of the moving head type in which a magnetic head is supported by a leaf spring on a supporting member horizontally. The leaf spring has an aperture at the center thereof to accommodate and support the magnetic head so that two wings of the leaf spring extend outwardly from opposite sides of the magnetic head in directions parallel with the reading direction or the direction in which the magnetic head travels carried by the supporting member. The leaf spring is supported by the supporting member so that a resilience is exerted against the magnetic card and also the magnetic head is rotatable about the axis along the two wings of the leaf spring by twisting the same.

Abstract: An ink liquid supply system for issuing ink from a nozzle under a predetermined uniform pressure in an ink jet system printer. The ink liquid supply system mainly comprises a gas pressure control means for generating a gas pressure of a predetermined uniform value, and a pressure chamber for applying the thus generated uniform gas pressure to the ink to be supplied to the nozzle.