Abstract: A head assembly moving along a long side of a magnetic card, more than one magnetic head rotating in the head assembly for reading/writing data, a rotary transformer and a carriage with a card holding mechanism for keeping a card at a predefined position are provided in a card reader of the present invention. A rotating part of the rotary transformer in the head assembly receives and sends a signal to the magnetic head and a fixing part of the rotary transformer is connected to a reading/writing circuit. On the card of the present invention, which is usually rectangular, there are tracks defined by plural arcs. The arcs are on plural same-size circles whose centers are aligned on one line along the long side of the card. A magnetic card or an optical card can be used for the present invention.

Abstract: A head assembly moving along a long side of a magnetic card, more than one magnetic head rotating in the head assembly for reading/writing data, a rotary transformer and a carriage with a card holding mechanism for keeping a card at a predefined position are provided in a card reader of the present invention. A rotating part of the rotary transformer in the head assembly receives and sends a signal to the magnetic head and a fixing part of the rotary transformer is connected to a reading/writing circuit. On the card of the present invention, which is usually rectangular, there are tracks defined by plural arcs. The arcs are on plural same-size circles whose centers are aligned on one line along the long side of the card. A magnetic card or an optical card can be used for the present invention.

Abstract: A magnetic head slider is disclosed, of which a surface in frictional contact with a magnetic recording medium has different shapes adjacent to air stream inlet and outlet ends such that mean gap with respect to the magnetic recording medium is smaller adjacent to the air stream inlet end than adjacent to the air stream outlet end. When performing recording or reproduction, the magnetic recording medium is sucked to be in contact with the magnetic head slider by a negative pressure generated with relative movement of the magnetic recording medium and magnetic head slider.

Abstract: A magnetic head includes a head core having a top surface with a magnetic gap for contact with a magnetic record medium and a pair of sections of a laminar slider bonded onto the top of the head core such that their top surface is flush with the core top surface to form a slider surface, thereby eliminating any sliders which have been bonded to sides of the head core.

Abstract: A magnetic head including a head core having at least one gap and a pair of non-magnetic reinforcing members bonded so as to clamp the head core therebetween. An elongate notch or bore is formed in at least one of the non-magnetic reinforcing members, the notch or bore extending from the gap to the end of the non-magnetic reinforcing member in the direction in which the gap extends, so that the depth of the gap can be directly and optically observed through the notch or bore. It is therefore possible to measure the gap depth easily and accurately in the magnetic head manufacturing process and hence possible to obtain a magnetic head with high accuracy.