Sheet stacking apparatus with trail edge control flaps

In a copier with a copy sheet stacking apparatus for stacking copy sheets exiting the copier at high throughput, the improvement wherein said copy sheet stacking apparatus provides positive control of sheets being stacked therein by including, a tray having a surface for receiving sheets from the copier and multiple independently acting sheet biasing means positioned overlying and immediately downstream of the entrance to said tray, said multiple independently acting sheet biasing means each includes a composite member having at least one elongated flexible member that overlies sheets entering the tray and at least one short flexible member that is adapted and positioned to interfere with sheets entering the tray in order to immediately remove the trail edges of sheets exiting the copier from the sheet exit path of the copier to thereby eliminate any possible interference of sheets already in the tray with succeeding sheets entering the tray, and wherein sheets entering the tray initially deflect both said elongated and short flexible members simultaneously.

A copy sheet stacking apparatus that provides positive control of sheets being stacked in the apparatus, comprising, a tray having a surface for receiving sheets from a source and multiple independently acting sheet biasing means positioned overlying and immediately downstream of the entrance to said tray, said multiple independently acting sheet biasing means each includes a composite member having an elongated flexible member that overlies sheets entering the tray and a short flexible member that is adapted and positioned to interfere with sheets entering the tray in order to immediately remove the trail edges of sheets exiting said source from the exit path of said source, and wherein sheets entering the tray initially deflect both said elongated and short flexible members simultaneously.

A copy sheet stacking apparatus that provides positive control of sheets being stacked in the apparatus, comprising at least one pair of sheet output rollers, a tray having a surface for receiving sheets from said at least one pair of sheet output rollers and multiple independently acting sheet biasing means positioned downstream of and in interfering relation with sheets exiting said at least one pair of sheet output rollers and overlying and immediately downstream of the entrance to said tray, said multiple independently acting sheet biasing means each includes an elongated flexible member that overlies sheets entering the tray and a short flexible member that is in contact with said at least one pair of sheet output rollers and is adapted to immediately remove the trail edges of sheets exiting said at least one pair of sheet output rollers from the exit path of said at least one pair of sheet output rollers.