Patent GB-191300529-A (GB)
Title: A Machine for Making Pointed or Cone Shaped Paper Bags.
Inventor: DENMAN WILLIAM
IPC: B31B25/00
Filed: 1913-01-08
Granted: 1913-11-06
Abstract: 529. Denman, W. Jan. 8. Paper bags, making. -Relates to a machine for making pointed or kite-shaped paper bags and consists chiefly in so constructing the creasing - rollers that make the first fold of the bag that the blank, during and after passing between them, continues to move in the same straight line. The machine is shown in plan in Fig. 1. Paper from a roll is gummed along one edge by a wheel 47<t>, and after passing between draw - rolls 4, is cut into blanks by a revolving cutter such as that described in Specification 15,578 / 11, [Class 69 (ii), Hydraulic presses &c.]. Both the upper draw-roll 4, the uppermost of the pair of rolls 4<b> and some of the succeeding rolls that feed the cut blank are reduced in diameter for a short distance from one and, as shown at E, in order to avoid interfering with the line of paste and thus to prevent smearing of the rolls. After leaving the feed-rollers 4<b>, the blank is caught between rollers 5 which feed it to the creasing- rolls. The inner bearing of the rollers 5 are supported by an arm 55 pivoted on a bar 27, and the pressure between the rollers is adjustable bv means of a nut 58. The outer end of the rod 27 and the outer bearings of the rollers 5 are mounted in slots in the frame so that the position of the rollers 5 may be adjusted. After leaving the rollers 5, the blank passes over a plate 79 hinged at 57, and then over a bar 64 inclined to the frame members which assists in forming the first fold of the bag and supports the bearing for the inner ends of the creasing- rollers 6, 6<g>, 6<h>. The plate 79 is oscillated by cam mechanism and in its uppermost position directs the blank over the top of the bar 64. While the end of the blank is still held between the rollers 5, the plate 79 swings downwards, and an oscillating dipper 17 forces the front end of the paper beneath the bar 64 and between the rollers 6, 6<g>, 6<h>, thus forming the first fold of the bag as shown in Fig. 7. These rollers are parallel with the feed-rollers so that the blank passing through them continues to move in the same direction. The blank next passes between non-adjustable rolls 7, 7<f>, the inner ends of which are supported in the same way as the inner ends of the rollers 5, which feed the blank against a stop-plate 38. The blank in this position lies over a slot in the table beneath which are folding-rollers 42. A reciprocating blade 18 descends on the paper along the dotted line in Fig. 7 and forces it between the rollers that form the last fold of the bag and press the pasted edge against the edge of the side previously folded. In making bags of small size, the blank may not be wide enough to pass between the rollers 7<f>. In this case, three pairs of disks 5<c>, 5<d>, 5<c>, secured to the ends of rotating shafts are used to feed the paper against the stop 38. The position of the disk rollers may be adjusted longitudinally by means of screws 82, and the rollers 5d, 5<e> may be adjusted transversely by means of nuts 84. The dipper blade 18 must be changed for each size of bag to be made.