Patent GB-277566-A (GB)
Title: Improvements in machines for making closure discs or caps for bottles and other containers
Filed: 1927-03-14
Abstract: 277,566. Plympton, F. K. March 14, 1927. Disc closures ; stoppers, making.-A machine for making closure discs for bottles and other containers having a wire bail or lift secured thereto comprises means for forming lengths of wire into U-shape, means for passing the legs of the formed wire in one direction partially through the strip or stock from which the discs arc to be cut, means for bending and clinching the inserted ends with respect to the stock and means, for bending, the non-inserted portion in flatwise relation to the surfaces of the stock. The machine comprises a base 20, Fig. 1, supporting at its ends uprights 22, 23 which are interconnected by a horizontal brace 24. The uprights 22, 23 carry bearings 25, 26, for a main shaft 27 having at one end an eccentric 55 adapted to drive, through ratchet and pawl mechanism 46, 48, a feed roller 41 which co-operates with a similar resiliently mounted roller 42 to feed paper strip or stock intermittently along a longitudinal guide comprising a slideway 30 and side strips 31. To accommodate the wire bail, a slight impression B, Fig. 2, is made in the, stock by a punch 59 secured to a slide 57 adapted to be reciprocated vertically in a slideway 56 by an eccentric 64 on the shaft 27. The slide 57 also carries a bar 115 to which is pivoted a link 114 connected to a pawl 112 adapted intermittently to rotate a roller 100 which co-operates with a similar roller 101 to feed wire for making the bails from a supply roll 117. Wire bail forming mechanism. An opening in the slideway 30 and a pocket beneath it in the base 20 accommodate the base portion 67, Figs. 9 and 12, of this mechanism, the upper surface of the portion being flush with the slideway 30 so that the strip A may pass across it. The base portion 67 carries a base 70 on which is mounted a vertical support 71 formed with a slideway 73 for a slide 74. In a plate 78 flush with the rear face of the slideway 73, an anvil 80 is slidable into and out of the path of a slide 126, mounted in the slide 74, being operated by a lever 85 operatively connected to a spring pressed lever 87, Fig. 1, actuated by a bar 147 mounted on the slide 74. The movements of the slides 74 and 126 are controlled by cams on the main shaft 27. The wire is fed through a tube 95 to a guide block 93 secured in a cut-out 92 in the support 71 and passes through an aperture 119 in the block, the aperture being arranged at an angle to the cutout to guide the wire below the lower part of the slide 74 and above the anvil 80. The slide 74 carries a cutter 130 which severs the wire at an angle to provide it with sharp ends to penetrate the stock. The slide 74 descends and bends the wire about the anvil to U-shape. The legs of the U are confined in a vertical position by abutting against a rectangular projection 146 secured to the plate 78. As the slide 74 reaches its lowermost position the bar 147 actuates the lever 87 withdrawing the anvil 80, and the slide 126 forces the U-shaped wire through the strip A until it is arrested by the projection 146, the legs being guided by channels 193a in a slidable member 191 disposed above the strip. The upper part of the wire is held vertical by the projection 146 and channels 193a and the parts of the wire which project through the strip are guided by channels in a platen 151 secured in a pocket 148 in the base portion 67. Beneath the, pocket is a transverse opening 149 having inclined slideways 150 extending from the upper part at the rear of the base portion 67 to the lower part at the front. A slide 169, Fig. 16, is reciprocated in these guides by levers 173, 176, which are connected to a cam on the shaft 27. Upon this slide are mounted pins 187 and plates 182 formed with vertical portions 184, horizontal parts 185 and upwardly inclined portions 186. These plates move in guideways formed by a recess in the plate 151 and a block 156 disposed in it and are adapted to engage the downwardly projecting ends of the wire. These ends rest against spring-pressed anvils 165 slidably mounted in a channel 159 in the plate 151, and on their engagement by the vertical portions 184 of the plate 182 are bent upwards at an acute angle to form prongs, as shown at E, Fig. 13. The pins 187 then engage cams on the anvils 165 and remove them from the paths of the plates 182, the inclined portions 186 of which bend the wire until its ends pass upwards through the strip A. At this juncture the member 191 above the strip A is moved forwards by a lever 200 connected to a cam on the shaft 27, its front end pressing the upper part D of the wire down into the recess B in the strip A whilst the edge of a recess 195 in it clinches the ends E in the strip. When the member 191 is drawn back, the strip A is fed forward bringing the bail beneath a die 219 mounted in a bracket 211 adapted to be reciprocated by an eccentric 215 on the shaft 27, the die embedding the portions F of the bail further in the strip. On the next movement of the strip, a stamp 222 secured to the bracket 211 punches out a disc which is delivered through a shoot 224.