Patent GB-190916363-A (GB)
Title: Improvements in Container Forming Machines.
Inventor: THOMPSON JESSE CALDWELL
IPC: B31B17/00
Filed: 1909-07-13
Granted: 1909-11-25
Abstract: 16,363. Thompson, J. C. July 13. Paper tubes.-Paper or like containers are made by means of the machine shown. Conical forms 28, Fig. 1, are mounted on the ends of the hollow spokes 23 of a wheel, which is intermittently rotated by the engagement of a rotating arm 20 with depending pins 21 on the wheel. The forms are hollow, and each has a longitudinally movable end 30, which is normally held outwards by a spring 31, Fig. 9, but is withdrawn when rollers on the inner end of an arm 32 connected to it engage a cammember 34. The blanks for the side walls of the container are contained in a hopper 42, and the lowermost is fed forwards over a form 28 by reciprocating feeder bars 44, provided with catches set to engage the lowermost blank, after one of its edges has been glued by a bar 57, which is operated to dip into a glue box and then to press against the lower face of the blank. The blank is then bent round the form by the descent of jaws 60, Fig. 7, pivoted to a member 61 supported by rods 62 from an oscillating arm 63, which is also directly connected to the jaws by rods 75 and swivel members 78. Springs 77 are interposed between members 78 and adjustable collars 79. By the relative adjustment of these collars, it is arranged that the motion of the left-hand clamp 60 takes place slightly before the other, so that the glued edge of the blank is placed over the other edge. A clamping- member 95, Fig. 9, is then allowed to press against the joint by a cam lowering a pin 101 which allows a gate 100 at the end of a cammember 96 to move outwards so as to permit the spring 106 to act. When the form arrives at the position 110, the end 30 is drawn inwards, and the projecting end of the blank is internally glued. A glue box 112, Fig. 8, discharges liquid glue on to a sponge 114 held between a plunger 115 and a ring 121 normally held outwards by a spring 122. The plunger is forced into the projecting end of the container 41, and the sponge expands radially. The end of the receptacle is inserted when the form is in the position 130. Paper is fed from a roll 135 by rollers 136 into die mechanism which cuts out a circular blank. A former contained within the moving die forms the blank into a cup shape and forces it into the projecting end of the container, which is then moved into the position 160, where rollers 161 mounted on a revolving frame 162 act to curl the bottom edges over to form a joint. Springs 167 force the slider frame 165 forwards, to bring the rollers into operative position when permitted by a cam. The finished receptacle is stripped from the form in the position 180. Just before reaching this position, the roller 94 on the extension 93 of the clamp lever engages the cam-member 96, and the clamp 95 is removed from the container, and at about the same time the end 30 of the form is allowed to move outwards by reason of the rollers on the end of the arm 32 passing out of engagement with the cam-surface 34. A slider has a pair of wings adapted to fit around the forms 28 and strip off the containers as they move forwards. The wings are held apart at the rear end of their travel by a spreader, on which they ride.