GB220046A - Improvements in machines for glueing and folding box blanks - Google Patents

Abstract

220,046. Nasmith, J. W. May 4, 1923. Machines for making folding boxes. Tubular cartons or boxes with end closing flaps are made from blanks or shown in Fig. 1 by folding the panel B, C over upon the middle. panels G, H, Figs. 2 and 3, the blank being traversed through a folding machine in a direction at right angles to the scores or creases E, E<1>, D; glue may be applied to a lip A which becomes secured to the panel C. The blanks are fed from a hopper to rollers 1, 2; 1<1>, 2<1>, Fig. 4, which pass the blanks over blades 5 to a stripping roller S working in conjunction with a glue roller R as described in Specification 8263/11; the blades 5 are adjustably carried by arms on a rod 3 and have inclined separated parts 6, Fig. 5, over which the end flaps F of the blanks pass, the panels passing between the inner edges thereof and, as the roller 1<1> is placed slightly forward of the roller 2<1>, the front edge of the blank or the lip A in its forward movement is directed downwards and against counterweighted pivoted finger 8 which momentarily arrest the blank and cause the lip A to touch the roller S and become glued. At the same time the flaps F ride up the parts 6 and raise the blank from the glue or stripping roller, the blank pushing the fingers 8 aside and coming into contact with swinging levers 9 adjustably secured on a rod 10 connected to a spring 32. The blank pushes the levers forward until the crease E is free from the rollers 1<1>, 21 or the fingers 8, when the levers 9 swing back and fold the panel B and flap A on to the panels G, H. The doubled edge E then passes over a plate 15 to rollers 16, 17, 18, 19, the rollers 18 being discontinuous and acting only on the flaps F to feed the doubled edge E over a plate 20 into recesses 21 at the lower ends of narrow pendent levers 22 carried by a rock shaft 23; the ends of the levers work in grooves in a curved grid 27 and are pushed away by the edge E of the blank up the grid 27 until the crease D has passed over the plate 20 and the panel C is free from the rollers 18, 19 when the panel is lifted by teeth or flutes on the rollers 18; the blank then collapses and is forced by the return of the levers 22 downwards to the shoot between the nose of the grid and the face 29 of the plate 20; the doubled edge D then passes between rollers 19, 30 which presses the panel C against the lip A. If the lip A is not to be glued the rollers S, R and glue tank are removed and the fingers 8 are swung upwards out of the path of the blank. The flutes or teeth of the roller 18 may be square or angular and may be resiliently mounted therein. The levers 22 and grid 27 are adjustably mounted on the frame 31 and the movements of the levers 9, 22 are limited by adjustable stops.