Patent GB-190312511-A (GB)
Title: Improvements in Seaming Machines for Joining the Heads or Ends of Cans to the Bodies of same.
Inventor: MACKENZIE JOHN WILLIAM
Filed: 1903-06-02
Granted: 1903-07-02
Abstract: 12,511. Mackenzie, J. W., [Bliss Co., E. W.]. June 2. Metal, sheet, seaming and joining.-Relates to a double seaming- machine for attaching the heads or ends of cylindrical metal cans. Fig. 1 is a side view of the machine, Fig.4 is a plan, and Fig. 5 a section on the line x-x of Fig. 4, Figs. 9, 10, 12, and 13 show the action of the rollers 79, 89, 90, 84 in attaching the head 115 with a burred flange 117 to the body 116 of the can. Fig. 15 shows the finished seam, rendered tight by an india-rubber ring 119 between the flanges of the head and body. The can is clamped between the chuck 11 and the pad 16, Fig. 1. The chuck 11 is mounted on a spindle 7, the upper end of which is provided with a tightening-device 10. It is rotated by the pulley 12 and belt 15. The pad 16 is attached to the spindle 17 sliding in the bushing 18. On the spindle 17 are a fast collar 19 and a loose collar 20, between which are interposed spiral springs. The pad 16 is elevated to clamp the can by means of the treadle 56, rod 57, crank arms 58, 55, rock-shafts 54, 22, and rods 24 on both sides of the spindle 17. When the can is clamped, the spindle 17 rotates in the antifriction bearing 27. The seaming-mechanism 28 is carried by a bracket 29 movable horizontally in guides 30, and is adjusted for cans of different sizes by means of the rock-shaft 31, Fig. 4, which carries a projection 32, engaging a notch 33 in the bracket 29, and is operated by a handle 34. The clamp 35 holds the bracket 29 when in position. The cam shaft 36 receives a slow motion from the wormwheel 37 and worm 38, driven by the pulley 40 and belt 42, which are movable with the bracket 29. The cam shaft 36 is preferably worked intermittently through a clutch 43, the worm-wheel 37 being mounted loosely on the shaft and provided with clutch-surfaces engaging a bolt 46 which lies in a groove 45 in the shaft 36. The bolt is held against the clutch-surfaces by a spring 47. In the bolt is a transverse slot 48. A finger 49 having a bevelled point is caused to bear upon the shaft 36 by the spring 50, and, as the shaft rotates, this finger enters the slot 48 and withdraws the bolt from contact with the clutch-surfaces, thus stopping the rotation of the shaft. The finger 49 is moved out of contact with the shaft 36 by the treadle 56 at the same time as the pad 16 is elevated, by means of the lever 51, rod 52, and arm 53 attached to the rock-shaft 54. The shaft 36 makes one revolution for every complete seaming-operation. The treadle 56 is held down during each seaming- operation by means of the cam 60, mounted on the shaft 36 and provided with a notch 61. A roller 64 engaging with the cam 60 is attached to a bell crank 62, one arm of which is connected by the rod 66 to the rock-shaft 22. The treadle is held down by the cam, except when the roller 64 lies in the notch 61. The seaming-rollers 79, 84, 89, 90 are mounted on a carrier 75 which is caused to oscillate on a central pivot 74 by the roller 76 engaging with the cam 71. The seaming-members are thus successively brought to bear upon the work. The first seaming-member consists of a curling or crimping roller 79 having a horizontal groove and mounted on a sliding piece 80 held by a bolt 82 passing through the side pieces 77 of the carrier 75. It is adjusted by the screw 83. The third seaming- member 84 consists of a finishing-roller mounted in a similar manner, but it is allowed a slight play by being mounted on a bracket 85 which turns on a pivot 86 and is held against the side piece 77 by the spring 87. The intermediate seaming-member consists of two conical deflecting-rollers 89, 90, each of which has a vertical motion. They are mounted on arms 91, 95 pivoted on the bolt 82. These arms have bifurcated ends and are provided with rollers 92, 96 projecting into grooves 93, 97 on the sleeve 94 and stem 98. The sleeve and stem extend through the pivot 74 and slide therein. A shaft 99 carries loosely two arms 100, 101, having rollers at their ends held in engagement with the cams 72, 73, by the spring 102. Extensions 103, 106 of these arms have bifurcated ends carrying rollers 104, 107 engaging grooves 105, 108 on the the stem 98 and sleeve 94. By these means, the rollers 89, 90 are given a movement towards and away from each other, the roller 89 coming in contact with the seam first. The seaming rollers rotate freely when brought into contact with the work. When the head of the can has a straight horizontal flange, a crimping-roller having a wider groove is substituted for the roller 79.