APPARATUS AND METHOD FOR BURNISHING MAGNETIC DISKS

    公开(公告)号:DE3279611D1

    公开(公告)日:1989-05-18

    申请号:DE3279611

    申请日:1982-12-14

    Applicant: IBM

    Abstract: The burnishing tool has a plurality of holes (41) in the planar surface (40) which engages the flexible magnetic disk (4). Each hole contains a burnishing blade (42) positioned at 45° to the direction of motion. A manifold (20) connects each hole to a vacuum pump which draws air into the holes causing the flexible magnetic disk to fly against the planar surface. The vacuum also removes the debris from the burnishing tool.

    3.
    发明专利
    未知

    公开(公告)号:DE2653900A1

    公开(公告)日:1977-07-07

    申请号:DE2653900

    申请日:1976-11-27

    Applicant: IBM

    Abstract: A document card reader including a row of light sources transmitting light through a corresponding series of column-like cavities within a pair of members between which a document card with punched openings therethrough may move and a convex lens placed so as to receive light transmitted through the document card openings and transmit the light from all of the openings to a photodetector positioned at substantially the focal point of the lens.

    5.
    发明专利
    未知

    公开(公告)号:CH600440A5

    公开(公告)日:1978-06-15

    申请号:CH1580776

    申请日:1976-12-16

    Applicant: IBM

    Abstract: A document card reader including a row of light sources transmitting light through a corresponding series of column-like cavities within a pair of members between which a document card with punched openings therethrough may move and a convex lens placed so as to receive light transmitted through the document card openings and transmit the light from all of the openings to a photodetector positioned at substantially the focal point of the lens.

Patent Agency Ranking