Cassette loaded sheet feeder for reproduction machine

A reproduction machine having a copy sheet cassette adapted for insertion and removal from the machine for loading copy sheets therein comprising

• a cassette having a front wall, a rear wall, side walls and a top wall adapted to receive a stc of copy sheets therein,
• a bottom wall, adapted for pivotal movement toward and away from said top wall,
• a friction retard sheet feeder adapted for sequentially separating single copy sheets from the top of the copy sheet stack, said friction retard feeder comprising sheet separator means permanently mounted within the reproduction machine and friction retard means mounted on said front wall of the copy sheet cassette,
• means for positioning the front wall of the cassette within the reproduction machine to provide the required spacial relationship between said sheet separator means and said friction retard means, said positioning means including an abutment means formed on the front wall of said cassette and a corresponding abutment mounted within the reproduction machine;
• a cassette locking lever moveable between a cassette locing position and a cassette removal position having a cam surface formed thereon adapted for cooperation with a cam follower to force the sheet cassette upwardly such that said abutment means on the wall of the cassette is moved into engagement with said abutment means mounted within the machine to accurately position the cassette within the machine and provide the required spacial relationship between said sheet separator means and said friction retard means when said locing lever is moved to the locking position;
• and,
• biased lever means adapted for contact with said bottom wall of the cassette to bias said bottom wall in an upward direction to maintain the top sheet in the copy sheet stac in contact with said sheet separator means irrespective of the quantity of copy sheets in the sheet cassette.