Patent GB-525726-A (GB)
Title: Improvements in or relating to apparatus for stacking sheets which are continuously delivered thereto
IPC: B65H33/16
Filed: 1939-02-27
Abstract: 525,726. Delivery apparatus. CHAMBON CORPORATION. Feb. 27, 1939, No. 6417. Convention date, March 12, 1938. [Class 100 (1)]  An apparatus for stacking sheets which are delivered thereto continuously at spaced intervals comprises a primary sheet carrier provided with sheet-receiving means at spaced intervals along its length, and secondary carrier means disposed in substantial alignment with the primary and arranged to travel along a path merging at one end into the path of the primary carrier, and including means associated with the second carrier for supporting sheet-receiving means and feeding them into said primary carrier. The sheets are delivered from the machine on to a table 18, Fig. 1, formed by spaced strips extending between sets of rollers 10, 11. The rollers 11 are independently driven at a greater speed than the rollers 10 so that the sheets are spaced apart. The rollers 11 deliver the sheet into a tray 65, Fig. 3, which is supported on extensions 66 of links in endless chains 21 supported on uprights of a frame 2Q and connected together for simultaneous driving by pawl-and-ratchet mechanism actuated by an adjustable crank on a continuously-driven shaft 40. The chains 21 are driven at such a speed that the trays 65 descend at a slightly greater rate than the pile of sheets increases. Extending from above into the path of movement of the chains 21 are other chains 45 normally driven in synchronism with the chains 21 by means of a pin 60, Fig. 8, on one of the sprocket - wheels engaged' by a tooth 61a secured to shaft. Secured to the shaft of another of the sprocketwheels supporting the chains 45 is a ratchet 70, Fig. 7, having wide-spaced teeth 70a separated by a long arcuate section 70b. A pawl 84, spring- pressed into engagement with the ratchet is attached to a plate 71 pivoted on the shaft and connected to a lever 73 rocked from an eccentric 77a. The movement of the pawl 84 is less than the length of the arcuate sections 70b, so that normally the pawl reciprocates idly, but as the shaft is gradually rotated from the shaft 40, the pawl finally engages one of the teeth 70a and rotates the shaft rapidly. This is timed to occur between the delivery of two adjacent sheets by the rollers 11 and effects the transfer of a tray 65 from the chains 45 to the chains 21. The trays are supplied manually to the chains 45 and rest on fingers 67 pivoted to the chains. These fingers are provided with extensions which are received in a groove in a guide-plate 91 so that they are held in correct position for supporting the trays. Co-operating gripping-fingers 90 are also carried by the chains; these also have extensions which enter a guide groove in a plate 92 so that for a part of their movement they are held raised so as not to interfere with the insertion of the trays, and then are rocked to co-operate with the fingers 67. The chains are normally held taut by rollers 96, 97, and strips 100 serve to hold them in position. Manually-adjustable brakes 105<SP>1</SP>, 106<SP>1</SP>prevent overrunning, The bottoms of the travs are slotted to permit the passage of arms 111 serving to push the sheets down in the trays, and front and side joggers are provided. The trays may be formed with sloping bottoms.