offset from the marginal flange 86 of the front portion of the tray and has an inclined camming surface 98 which assists in centering the tray in the printer during installation thereof by engaging a correspondingly beveled surface on the left hand printer chassis sideplate 60 the output tray 70 also has a rearwardly and forwardly extending guide wing 100 depending downwardly from the undersurface of the rear portion 76 proximate the left side edge thereof the wing 100 has a rearwardly and upwardly extending guide surface 102 and a forwardly and upwardly extending guide surface 104 which respectively engage the left hand printer chassis plate 50 to lift the left hand tray edge during attachment to and removal of the tray 70 from the printer when properly positioned the paper output tray wing 100 is received in a pocket in the left hand printer chassis plate such that the front portion of the tray is properly oriented horizontally fig1 and 18 show vertically extending webs 106 108 integrally molded on the underside of the output tray whose lower edges 107 109 define horizontally extending output tray support surfaces which engage the horizontally extending web support surfaces 28 40 on the printer input tray arms 25 27 downwardly facing projections 110 112 on the output tray support surfaces are received in the previously described upwardly facing notches 37 47 on the paper input tray web support surfaces a plurality of vertically extending stiffening webs 114 is also shown on the underside of the horizontal and inclined surfaces of the paper output tray which also has a sliding shelf 120 to accommodate paper of.