Apparatus for automatically closing L-slide lock cases

Apparatus for automatically closing the top of a case having a closing flap and L-slide lock slots for receiving opposite free end corners of the closing flap while the case is moving with its longitudinal axis in the direction of movement, the apparatus comprising:

• (a) a conveyor for moving a case, the case having a top portion which includes an open closing flap having a free longitudinal edge and opposite free end corners, the top portion further including L-slide lock slots for receiving respective free end corners of the closing flap;
• (b) means for guiding the case to accurately position the case on the conveyor during movement of the conveyor with the longitudinal axis of the case in the direction of movement of the case;
• (c) means for bending the closing flap to form a longitudinal bend in the closing flap while the case is moving on the conveyor so that the free longitudinal edge of the closing flap is positioned at about a level with the top of the case and the opposite free corners of the closing flap are positioned adjacent respective L-slide lock slots, the longitudinal bend being generally parallel with the direction of movement of the case;
• the closing flap bending means including a stationary, flap-bend position guide edge extending generally parallel to the conveyor and above the conveyor surface at a position above the top of the case but substantially below the free longitudinal edge of the closing flap and positioned slightly inside the surface of the closing flap when the closing flap is positioned vertically;
• and the closing flap closing means further including a stationary bend-forcing guide edge including an inclined portion extending from a position outside the surface of the closing flap when standing vertically, the bend-forcing guide edge extending downwardly and inwardly to cross over the bend position guide edge when viewed either horizontally or vertically to a position inwardly and below the flap-bend position guide edge;
• (d) means for tucking the opposite free end corners of the closing flap into the respective L-shaped slots during movement of the case by the conveyor, the closing flap tucking means including means for holding the longitudinal edge of the closing flap at about a level with the top of the case, the closing flap tucking means further including means for guiding the longitudinal bend of the closing flap to a position at about a level with the top of the case, while the case is moving on the conveyor, to cause each of said free end corners to enter the respective L-shaped slots and thereby close the top of the case;
• the longitudinal edge-holding means comprising a horizontal edge extending from the inclined portion of the bend-forcing guide edge to a position under the longitudinal bend guiding means.