| 摘要 |
861,461. Box-making machines. TURNER, A. G. May 25, 1959 [Feb. 26, 1958], No. 6224/58. Class 18. A box-making machine comprises corner stay applying devices 12 through which box blanks and corner stay material 20 are intermittently fed, such that when the blank leaves the device 12 after having received its stays it draws up more stay material 20 through the device 12, means 18 being provided to sever the stay material from the boxes after they have passed through the device 12, thus leaving stay material in the device 12 ready for application to the next blank. The box blanks are fed on to a platform 2 on a rod 156 movable vertically by a rack 158. The platform is then raised and flaps extending outwardly from the blank are bent downwards by a breaker arm Fig. 8 (not shown), which is then moved forwardly to bend the flaps beneath the platform 2. The arms are then retracted so that the flaps depend substantially vertically from the platform. The platform then rises further until it is level with the upper ends of the corner stay applying devices 12, and a block 182 is raised by a rack 194 to contact the underside of the platform 2 and be positioned within the flaps of the blank. The corner stay applying devices 12 are then moved forwardly by pistons 112 in cylinders 110, Fig. 9, and spring jaws 120 press the stay material 20 already positioned within the jaws on to each corner of the box. A heating unit may be provided in the block 128 when using thermoplastic stay material. The stay applying device 12 is then retracted and the platform 2 raised further until the bottom of the blank is adjacent a device 18 for cutting the stay material, this movement drawing a further length of strip 20 into each applying device 12. The severing device 18 is then operated by supplying fluid pressure at 140, Fig. 10 to the space between two pistons 136, 138 in cylinder 134. The piston 138 moves a block 154 forwardly to engage each corner of the blank, and the piston 136 operates through a chain 146, a blade 152 to sever the stay strip just below the edge of the box. The stay strip is then pulled back slightly into the correct position relative to the jaws 120 for application to the next blank by an arm 88 carrying a roller 94 which moves the strip into a recess 96. |
