Method and apparatus for manufacturing hollow cylindrical guide roller for magnetic recording tape
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United States of America Patent
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Nov 28, 1989
Grant Date -
N/A
app pub date -
Sep 22, 1987
filing date -
Sep 15, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for manufacturing a hollow tape guide for guiding magnetic recording tape. In this method, a round rod-like metal wire is sheared by shearing cutters into a blank a predetermined length, having a first end and a second end. Then, the blank is shaped and made into a blank having a shallow recess in the second end. The blank is then extruded and made into a cup-shaped blank closed at the first end by a bottom and having a predetermined length and a predetermined wall thickness. Finally, the bottom of the cup-shaped blank is punched out, thereby providing a hollow tape guide. The bottom is thick when the rod-like blank is too long, and is thin when the rod-like blank is too short, so that the cup-shaped blank may have the desired length and desired wall thickness.
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