CARRIER PLATE WITH ROLLABLE BALL THEREIN
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United States of America Patent
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Issued Date -
Sep 30, 2021
app pub date -
Mar 24, 2020
filing date -
Mar 24, 2020
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Abstract
A carrier plate with rollable balls therein comprises a plate body including an upper plate and a lower plate; the lower plate being fixed to a lower side of the upper plate; the upper plate and lower plate having a plurality of through holes which are positioned corresponding to the through holes of the upper plate; a plurality of balls loosely embedded into the through holes of the upper plate and the lower plate. A diameter of the ball is larger than the summation of widths of the upper plate and lower plate, and the balls protrude from an upper side of the upper plate and a lower side of the lower plate.
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