Patent GB-189702781-A (GB)
Title: Machine for Making Cans of Angular Form.
Inventor: HUME ROBERT DENISTON
Filed: 1897-02-02
Granted: 1897-06-12
Abstract: 2781. Hume, R. D. Feb. 2. Making cans.-Relates to machines for making cans of angular form. The sheet of metal is placed in a holder A<1> with its edge resting on a projecting ledge A<6> of a sector A<2> when in a different position to that shown in Fig. 1. The sector A<2> is oscillated, by the link A<5> and rod C reciprocated from the crank shaft B, and the sheet is sheared between the stationary knife A<7> and cutter A<3> on the sector. The blank is carried by the sector into a horizontal position, and is drawn into the machine by reciprocating carriers 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 D<2> to hend the blank into a cylinder and cause the hooked edges of the blank to engage. The blank is then carried under pressing-apparatus at E to close the seam. This bending and seam-closing apparatus is similar to the apparatus described in Specification No. 21,364, A.D. 1894. The carriers for traversing the blanks are moved in spiral grooves in the horn D by means of the side bar C, and are constructed of blocks connected together by links with ball ends and provided with spring catches to engage the rear edges of the blanks. The can bodies are then traversed along the horn D, which changes from a circular to an angular form with inwardly-curved sides and rounded corners as shown in Fig. 2<a>, on which the blank is pressed by a shaping-ring F reciprocated by the side bar C. The carriers C<3> with spring catches 16 are secured to the ring F. Spring stops 17 prevent the return of the can bodies. A movable extension D<1> of the horn, provided with spring latches D' and reciprocate 1 by a rod G connected loosely to the side bar C by a crosshead G<2> and adjustable stops 23, 22 with spring 21, carries the can body into a tube D<3>, Fig. 9, past spring blocks P which are forced in behind the can and hold it in position. The can bottoms and can heads are contained in shoots 28 normally closed by projections 30 on a slide 29. A slide L, operated by a cam K on the shaft B, when advanced presses a plate M<1> against an arm 37 pivoted to the slide 29, which is moved toopen the shoots. Bolts 32 connected with the slide 29 by a lever 31 prevent more than one head and bottom from falling from the shoots. The bottom is forced on the end of the cam by a square pad M<3> connected to the plunger M<2>, and, by the further advance of the plunger allowed by the springs 35 and 39, pins with inclined ends force the sections N inwards to firmly crimp the bottom on the can body. The arm 37 is pivoted to a lever 38 resting normally on the can body. If a can body is not fed into the tube D<3>, the lever 38 drops into a groove in the movable extension D' and the arm 37 is raised so that the slide 29 is not operated by the plate M<1> and the shoots 28 remain closed. The end of the can is compressed by a ring 0 composed of sections pressed inwards by springs so that the cover or lid is easily forced over the mouth of the can by the movable extension D<1> of the horn, which also ejects the finished can from the tube D<3> as the slide L moves back.