Patent GB-739678-A (GB)
Title: Improvements in or relating to sheet pile inverting apparatus
IPC: B65H15/02
Filed: 1954-04-21
Abstract: 739,678. Sheet delivery apparatus. DEXTER FOLDER CO. April 21, 1954 [July 30, 1953], No. 11470/54. Class 100 (1). Tables, construction and actuation of.-Apparatus for inverting piles of sheets comprises a box-like carrier arranged for rotary movement about a horizontal axis passing axially through one side of the carrier, the carrier being disposed transversely of and at an oblique angle with respect to the horizontal axis, and means for rotating the carrier about the axis through an angle of 180 degrees in a direction such that the carrier will assume a rearward inclination as it rotates whereby the pile of sheets is retained therein and inverted. The apparatus comprises a base frame having outer and inner front plates 15, 16 and a rear plate 17 connected together by channel cross-beams 22 and vertical side-plates 23, 24. Disposed between the front and rear plates is a motor base 25 on which is adjustably mounted a reversible motor 26 adapted to drive a pulley 28, belt 29 and pulley 30 of a speed reduction unit 32. The unit 32 is connected to a sprocket 35 which, through a chain 36, drives a larger sprocket 37 keyed to a shaft 38. The shaft 38 is journalled in a bracket 39 and has secured thereto a bracket 40 which obliquely supports the rear wall 46 of the boxlike carrier 42. The carrier 42 is open at the front to receive a pile of sheets 45 and includes a pair of vertically-spaced horizontal walls 47, 48, a vertical pile-supporting and aligning side wall 49, and a vertical side wall 50. The carrier 42 is supported by an annular member in the form of a flanged outer ring 51 and an inner disc 52 secured to the flange of the ring 51 and having an opening therein to which is secured the carrier 42, the centre of the disc coinciding with the axis of the shaft 38. The ring 51 is rotatably supported on rollers 57, 58 secured between the front plates 15, 16 and is held in position by spring-biased rollers 61, 62. The carrier 42 is thus adapted to be rotated on actuation of the reversible motor 26 between the position shown in full lines in Fig. 2 and that shown in dot-dash lines, in such a manner that after the carrier has been rotated from either position through 90 degrees the sheets are effectively jogged against the side wall 49 and the rear wall 46, the rearward inclination of the carrier at that instant ensuring retention of the sheets. For restricting the angle of rotation to 180 degrees and preventing accidental rotation of the carrier in the wrong direction limit switches 73, 74 are provided on the rear frame plate 17 which are actuated by an element 72 fixed to the rear of the side wall 50 of the carrier. The limit switches are connected in an electric control circuit (Fig. 10, not shown) in such a manner that the actuation of one of the switches by the element 72 not only stops further rotation of the carrier 42 but prevents rotation from being re-initiated except in the opposite direction. Also provided are blocks 67 on the ring 51 which engage stop members disposed between the frame plates 15, 16. In an alternative arrangement the carrier may be rotated by means of a motor-driven gear meshing with a gear formed on the ring 51. For accommodating small piles of sheets spacers may be used comprising a number of wood bars 116 and wood runners 117 secured together. The bars 117 are provided with rearwardly extending pins which engage holes in the rear wall of the carrier and the bars 116 are provided with pins 119 for engaging holes 122, 123 in the side walls of the carriers, the pile 45 being supported between skid boards SB1 and SB2. Accidental removal of the spacers is prevented by spring-pressed latches 124 engaging with the pins 119.