Patent GB-189702782-A (GB)
Title: Can Making Machine.
Inventor: HUME ROBERT DENISTON
Filed: 1897-02-02
Granted: 1897-06-12
Abstract: 2782. Hume, R. D. Feb. 2. Making cans.-The sheet from which tl e can is to be made is placed in a holder A<1> with its edge resting on a projecting ledge 12 of a sector A<3> when in a different position to that shown in Fig. 1. The sector A<3> is oscillated by the link 10 and rod C reciprocated from the crank shaft B, and the sheet is sheared between a stationary knife and the cutter 11 on the sector. The blank is drawn into the machine by reciprocating carriers C' with hooked ends, which move the blank between rollers to form hooks along the edges of the blank, and between a mandrel or horn D and curved sheath to bend the blank into a cylinder and cause the hooked edges of the blank to engage. The carriers move in dovetail grooves in the tapering part of the horn, and are constructed of blocks connected together by links and provided with spring catches to engage the ends of the blanks. The cam bodies are then moved by carriers C<3> to the pressing-apparatus at E for closing the side seam, past the acid bath and the soldering-apparatus, to the end of the horn. The carrier bars C<3> are preferably constructed with teeth projecting towards the horn, and are reciprocated by the bar C, the connection being suchthat the bars C<3> are moved towards or away from the horn before each stroke so as to engage or disengage the teeth from the cans. The seam is closed between a die 33, Fig. 6, in a block 36 let into a slot in the horn and a die 34 carried by a slide 31 reciprocated by a shaft 28 oscillated by an arm 29 and the side bar C. The pressure is taken by a thrust plate 35 above the horn, and the side seam is guided between the dies by spring pieces 37, 38. Acid is applied to both sides of the seam from a bath F by a roller F<1> and an inside sponga carried by a pivoted arm F<3>. The soldering-apparatus H Fig. 8, consists of a tank heated by gas burners G<6>, G', G<8> and supplied with small pieces of solder through a box 42. The solder strip is fed through a guide 56 between rollers on shafts 57, one of which is actuated from the side bar C by a ratchet mechanism 59, 60. The strip is cut by a spring sliding knife 61 operated by the lever 59 striking the stud 62. The solder rises through the slot 44 in the outside soldering-iron H<2>, and is applied by the two soldering- irons H<1>, H<2> to both sides of the seam. The inside soldering-iron is heated by gas burners G<4>, G<5> forming branches of a gas pipe G connected to a flexible supply tube. The excess of molten solder overflows through passages into a side compartment 47, from which it is forced by a rising and falling plunger 52 into side compartments and back into the main part of the tank. The weighted pivoted plunger is raised by an inclined frame 55 on a bar T<2> reciprocated by cam mechanism. Excess of solder is removed from the seam by asbestos &c. wipers J, K, Fig. 2, and the seam is cooled by the can passing over a roller L revolving in a water bath M. A movable extension D' of the horn, provided with catches 66 and reciprocated by the hollow rod or gas pipe G which is attached to the side bar C at G<3>, Fig. 1, carries the can body into the heading-chamber N, Fig. 30, from which it is prevented from returning by spring catches 67 held in the bevelled ring N'. The can ends are supplied to shoots 0, from which they are allowed to drop singly into each end of the chamber N by arms 72 on a shaft 71 oscillated by the ram D<1> striking an arm 74 projecting through the side of the chamber. The ram D<1> forces the can end on to the can body and the can body into the other head, and drives the can into one of the chambers P<1>, Figs. 16 and 17, of the crimping or creasing apparatus for securing the heads on the body. The cans and ends are hold while being pushed into the chambers P' between the ram D<1> and a spring plunger S, which is reciprocated by rack mechanism 99, 98, 97 from a sliding shaft P<3> actuated by link mechanism from the bar T<2>. The chambers P' are supported in discs P<4>, P<5> rotated intermittently by a pawl 90 on a lever 89, Fig. 2, connected to a rod 86 reciprocated vertically by a lever 83 pivoted at 84 and actuated by a pin 81 on the side bar C moving in the curved groove 82. The discs with the chambers P<1> are held stationary while a can is being inserted by spring pawls 92, 93, the pawl 92 being released by the arm 94 before the discs are rotated. The chambers P<1> are rotated in the discs by the gears 79 engaging a toothed ring 80, and the can ends are secured on the bodies by the crimping-rings P. Apparatus is provided for making the can ends and for supplying them automatically to the shoots O. The two presses for making the can heads are constructed with a male die V<1>, Fig. 26, and a female die V<2>. The sheet, placed in the passage V, rests on a stop 114 and a disc is cut out against the opening 111 by the edge 104 of the die V<1>. The disc is carried forward to the female die and the edge flanged by the surface 105 of the male die. During the return stroke, a block attached to the die V<1> engages a catch on a lever and oscillates the shaft with the stop 114, allowing the sheet to drop into the passage V. The stop is returned by a spring when the catch of the lever is released. The can ends are separated from the dies by the spring ring 106 and the ring 116 pressed up by a spring 119 and plate 118, and the flanged can heads are delivered through passages 112 to shoots 113. The can heads are raised by endless-belt elevators into the shoots 0 of the can-heading chamber N.