Patent GB-505988-A (GB)
Title: Improvements in bundling machines
IPC: B65B17/02
Filed: 1937-11-18
Abstract: 505,988. Bundling-machines. NATIONAL GYPSUM CO. Nov. 18, 1937, No. 31804. Convention date, Nov. 27, 1936. [Class 94 (i)] Stacks of wall board and like units are secured by affixing an adhesive strip to the edges of the stack. The strip is of sufficient width to extend across the side edges of all the units, and has marginal portions which extend partly across the upper and lower faces of the stack. The marginal portions only are provided with adhesive. A stack s is placed so that one end rests on a previously fed stack s<1>, and the other end on a roller 19. The movement of the stack s<1> carries the forward edge of the stack s against a stop 44 until the action of feed rolls 50 withdraws it from its supporting position. The stack s then falls on a conveyer 10 and is fed forward in end abutting relation with the stack s<1>. Upon the rear end being pulled off the supporting roller 19, it strikes and depresses a roller 26 on a plate 21 pivoted at 22, causing an upstanding portion 25 to engage and align the rear edges of the units. At the same time, a bar 27 is depressed and opens a valve 35 to cause plates 40 to be pneumatically advanced to effect a transverse alignment of the units against a fixed plate on the other side of the apparatus. The stack then continues in abutting relation with the previously fed stacks towards the station at which the strips are applied. A strip 51, Fig. 3, is fed at each side through means 53 for applying marginal stripes a of adhesive. The strips pass round rollers 54, 55 to rollers 56 on spring mounted arms which apply the uncoated parts to the sides of the stack. Rollers 60, 65, 67 .. 69 turn over and press the marginal portions into contact with the upper and lower surfaces of the stack. The upper rollers are shown in Fig. 3, the first pair 60 being of rubber and freelymounted on arms 61 carried by arms 132 pivoted at 131 and provided with adjustable weights 133. Vertical pivots 62 allow lateral adjustment. The rollers 60 are mounted at a substantial angle to the line of movement so that they exert a wiping action. The subsequent rollers are freely mounted on fixed shafts, and at a less angle than the first pair. A similar set of rollers is disposed below the conveyer, the weighted arm 132 being reversed to cause the first pair 60 to exert an upward pressure. The strips are applied continuously, and are severed between the stacks by cutting apparatus 73, Fig. 1, shown in detail in Fig. 6. Serrated cutting discs 114 are mounted on arms 112, pivoted at 1121 and urged towards each other by springs 113. A blade 115 is vertically disposed between them. The whole are mounted on a block 103 carried by piston rods 102.' The leading edge of a stack trips a lever 72, Fig. 1, connected by links to a valve which is thereby opened and allows pressure fluid to pass through a pipe 106, Fig. 6, passages 107...109 and ports 110 to the pistons. The cutting devices are moved forwards against the action of a spring 104-and cut the strips, the distance between the lever 72 and the'cutting discs having been adjusted so that the latter will coincide with a point where successive stacks abut. The whole cutting apparatus pivots about a bushing 92, and is returned to normal position by a spring, so that the cutters can partake of the longitudinal movement of the stack, and permit continuous movement. The finished bundles are pushed off the conveyer by the succeeding ones.