If a computer is not used for the drawing of jurors pursuant to the provisions of § 14-7-140, the clerk shall write or cause the names of the jurors in attendance to be written, each on a separate paper or ballot which must be white and plain, which must resemble each other as much as possible, and which must be so folded that the name written thereon is not visible on the outside. The clerk shall place each of the ballots or separate papers in a separate, small opaque capsule or container, which must be as uniform in size, shape, and color as possible at the time of original purchase or repurchase of the capsules or containers. Whenever a jury panel of twenty is to be drawn, these capsules or containers must be placed in a small rotating drum, cylindrical in shape, having a handle at the end thereof and resting on such supports that it can be turned by means of the handle, the drum, capsules, and other equipment to be furnished by the jury commissioners and approved by the resident judge. When the containers or capsules have been placed in the drum, it must be completely closed and securely fastened and rotated by means of the handle for a sufficient length of time necessary for a complete mixing of the containers or capsules and the required number of jurors must then be drawn, one by one, by a responsible and impartial person designated by the clerk of court, with the approval of the presiding judge. The names of the jurors so drawn must be returned to the capsules and replaced in the drum when the jurors are no longer actually engaged in service on a trial jury.