Patent GB-262747-A (GB)
IPC: B65B51/10
Filed: 1926-11-15
Abstract: 262,747. Townsend, H. E. Dec. 9, 1925, [Convention date]. Packeting by wrapping-up. - Relates to a machine for sealing or closing packages of confectionery and similar articles enclosed in waxed paper. The machine as described is adapted to be used in connection with a machine for wrapping cylindrical articles in two wrappers, the inner of waxed paper and the outer of tin foil. A package 1, Fig. 1, shown between the wrapping rolls 75 of a wrapping machine 74, is transferred to one of a pair of semi-cylindrical recesses 10 in a lower heating block 2. An upper heating block 6, also with a semi-cylindrical recess 12, cooperates with the block 2 to heat the sides and seal the wrappers together, and heating plates 8 moving inwardly to seal the ends. Meanwhile, another package is placed in the other recess 10, the block 6 is raised and the first package removed to a cooling device, and an upper block 4 assists in sealing the second' package. The lower heating block 2 is mounted on a rocking arm 14 adapted to oscillate, so that. when in one position of rest and as shown in Fig. 1, one recess is aligned for co-operation with the upper heating block 4 and the other is in position to receive a packet from the machine 74 by means of grippers 78. On rocking to the left to the other position of rest, the right hand recess is in position beneath the heating block 6 and the other beneath the grippers 78. The end heating plates 8 are mounted on rocking arms 62, Fig. 4, pivoted at 64, the lower ends 65 being held by springs 70, 72 in contact with face cams 68. The devices for transferring the package from the wrapping machine to the heating blocks, and subsequently from the blocks to the cooling means, operate in a similar manner, and each comprises jaws 78, 80, Figs. 1 and 4. The jaw 78 is secured to a carrier block 84, and the jaw 80 is secured to a pin 86 extending through ears in the block 84 and normally pressed inwardly by a spring 88. Each carrier block 84 is mounted on a pivot pin 90 on levers 92, 94 respectively. The levers are pivoted at 48, 32 and are connected by a link 96 to be rocked simultaneously from the shaft 32. The jaws 78 are provided with extensions 98 slotted at 100 to be engaged bv a pin 102 on a fixed support. The jaws are thus turned into a vertical position when approaching the heating blocks and into a horpizontal position when approaching the wrapping machine and the drying device respectively. The jaws are opened at the appropriate times by the pressure of an abutment member 118 on the pins 86 to overcome the pressure of the springs 88. The members 118 are mounted on a rocking arm 120 actuated by a cam 124. The cooling device comprises two rubber or like resilient bolts 76, 77 round pulleys 126, 128. Leather belts 130, 132 are disposed between the belts 76, 77 and the pulleys to relieve the strain during driving. A sprocket chain 158, with upstanding projections 160, passes round wheels 154, 156, 159, and holds the packages in spaced relationship while passing between the belts. Both the belts are driven in a counter-clockwise direction, the lower moving slightly faster than the upper. The chain 158 is driven at a rate corresponding substantially to the difference between the speeds of the upper and lower belts. Presser strips 174 engage the ends of the packages. A stripping device 196 and a plate 194 direct the packages from the jaws 78, 80 into engagement by the chain 158, from which they are removed by hand or otherwise to a position on the left of Fig. 1.