Friction drive for a disc player

A device for rotating a disc, comprising:

• first and second flexible continuous loop elements;
• said disc having an outer edge;
• first and second means for revolving said first and second loop elements, respectively;
• means for reading said disc;
• means for engaging said first and second loop elements with said outer edge when said loop elements revolve, whereby said disc is rotated;
• and
• control means for changing a rotational frequency of said first and second loop elements.

Comprising:

• means for reading said disc;
• first and second drive belts;
• each of said first and second drive belts wrapping around first and second pulley sets;
• each pulley set including a drive pulley and a passive pulley;
• said first and second pulley sets being slidably mounted on first and second plates;
• said first and second plates being connected such that movement in a direction of one of said plates causes a corresponding equal and opposite movement in the other of said plates;
• said first and second plates having a playback position where said first and second drive belts engage an outer rim of said disc;
• means for moving said first and second plates to said playback position;
• and
• control means for adjusting the rotational frequency of said first and second drive pulleys.

A disc drive comprising:

• first and second belts;
• means for moving said first and second belts into contact with
• means for reading said disc;
• disc rotation means for driving contact points of said first and second belts with said disc at the same speed, and in opposite directions, whereby said disc is rotated without translation;
• and
• disc advance means for changing a speed of said first belt in a first direction at its contact point and for changing a speed of said second belt at its contact point in a second direction by substantially the same amount, whereby said disc is translated.