Lead screw for moving a head
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United States of America Patent
Stats
-
Mar 8, 1988
Issued Date -
N/A
app pub date -
Jan 23, 1986
filing date -
Jun 10, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lead screw for moving, for example, a printing head or a magnetic head. The screw is molded from plastics by a split mold comprising a plurality of longitudinally extending sections. It has on its outer peripheral surface a helical groove satisfying the following relationship: ##EQU1## where P: pitch of the groove; R: radius of the screw; r: radius of the screw between its longitudinal axis and the bottom of the groove; .theta.: angle of division of the mold sections; and L: a half of the difference in width between the top and bottom of the groove. The bottom of the groove is smaller in width than the top thereof.
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