Patent GB-249336-A (GB)
Title: Improvements in and relating to machine for making caps or closures for bottles, jars, and like containers
IPC: B31D1/00
Filed: 1925-04-14
Abstract: 249,336. Jensen, C. A., (American Dairy Supply Co.). April 14, 1925. Disc closures; stoppers, making. - A machine for making pulp-board or like disc closures for bottles &c. and of the kind described in Specification 15653/09 comprises a paper-band feeding mechanism, one or more printing mechanisms, a milling mechanism for cutting a recess to receive a withdrawal tab, a wire feeding and stapling mechanism, a tab-strip feeding mechanism, and a disc cutting mechanism. A scoring mechanism may define the area to be cut out by the milling mechanism. The closure comprises a disc 289, Fig. 39, formed with a recess in which a removal tab 278 is secured by a wire staple. The machine comprises a vertical plate 3, Fig. 1, mounted on an horizontal table 2 which supports the bearings 4 of a main shaft 5. The discs are formed from a strip A of paper drawn from a roll 12 rotatable on one end of an axle 11 carried by a head 2 which can be turned in one direction only about a standard 7 secured to the frame of the machine. The arrangement permits a second roll, mounted on the other end of the axle 11, to be swung into line with a guide 54 when the first roll is used up. Feeding rollers 13, 14 are driven by chain and sprocket gearing from a shaft 25 geared to a shaft 21 driven, by a vertical shaft 19 and bevel gearing from the main shaft 5, and draw the strip continuously from the roll 12. To advance the strip step by step so as to permit the successive operations to be performed on it between its movements, it is threaded between feed rollers 15, 16, the roller 16 being mounted on the same shaft as a Geneva stop-wheel 39 which is rotated intermittently by a pin 40 on a crank arm secured to the shaft 21. The rollers 14, 16 are geared respectively to the rollers 13, 15, which are pressed against them by springs controlled by cam levers. The strip first passes beneath a printing mechanism B. The printing mechanism is actuated by an eccentric 55, Fig. 10, on the main shaft 5, the eccentric being connected to an apertured slide 63 by an adjustable pitman comprising heads 57, 58 connected by a right and left-hand screw 59. A screw-supported bed 74 provides for further adjustment of the apparatus. Outwardly projecting arms 65 on the slide 63 support a cross member 66 having a central aperture in which the stem 67 of a form carrier 68 is positioned, the printing form 70 being adjustably secured in a dovetailed recess in the carrier 68. Spring-pressed levers 71 engage a groove in the top of the stem 67 to detachably secure the carrier 68 to the member 66. Ink is supplied to the printing form by four pairs of rollers 120 carried by parallel chains 116 which pass around sprocket wheels 112, 115 mounted in brackets 101, 113 secured to the plate 3. In passing around the sprocket wheel 115, discs 119, Fig. 11, on the shaft 118 of each roller contact with similar discs on the shaft of an inking roller 123 which forms one side of an ink trough 122 and is rotated through a. ratchet and pawl mechanism 124 bv an eccentric 126 on the shaft 114 of the sprocket wheels 115. The inked rollers pass beneath oppositely rotating spreading discs 98 housed in a plate 99 and displaceable vertically therewith against the action of springs 100, the plates being rotated by ratchet and pawl mechanism 88, 87 operated by a lever 85 actuated by an eccentric 82 on a shaft 80 driven by gearing from the main shaft 5. The rollers 11 pass beneath the printing form 70 as the slide 63 commences to move downwards, the consequent displacement being compensated for by the inward movement of the sprocket wheels 112 which are mounted on blocks 103 adapted to slide inwards against the action of springs 104. A second similar printing mechanism C may print additional matter in the same or a different colour. From the printing, the strip A passes to a scoring mechanism D which outlines the recess for the removal tab. Through an adjustable pitman 130 an eccentric 128 reciprocates a plunger 132 and guide rods 133 in a bracket 134 secured to the plate 3 and the plunger carries a block 135 on which a block 136 is adjustable longitudinally of the strip A. A second block 137 adjustable on the block 136 transversely of the strip carries the scoring blades 138. The material thus outlined is removed by a milling mechanism E to which the strip is next moved. The milling cutter 140 is rotatably mounted in a lower carriage member 144 secured to a triangular upper carriage member 145 to make its height adjustable, the cutter being driven from an external source through a belt driven shaft 150. The whole carriage is reciprocated horizontally in an arm 146 of the plate 3 by a lever 155 connected by an adjustable pitman 154 to an eccentric 153 on the main shaft 5. The strip A is next fed to mechanism F for forming the tab and the staple securing the tab to the disc. Wire 159, Fig. 28, is fed from a roll 158, any backward movement being prevented by the upward movement of a wedge which jams it against a co-operating plate in a block secured to the plate 3. Beneath this block, a plate 170, slidable with some friction on a plate 173 secured to the panel 3, carries fixed and movable plates 169, 171 between which the wire is clamped by a cam surface 178 on a lever 177 pivoted to the plate 170 when the outer end of the lever is depressed by an adjustable pitman 182 connected to an eccentric 183 on the main shaft 5. Continued movement of the lever 177 moves downwards the slide 170 drawing from the roll 158 sufficient wire to form a staple. On the upward movement of the lever 177 the plate 171 is released, freeing the wire 159 and the plate 170 is raised to its initial position by contact of the lever with a stop 179 on the plate 170. The wire is fed beneath the grooved end of a compound slide comprising two rectangular members 188, 189 which are reciprocated independently from the main shaft 5, the member 189 by an eccentric 195, and the member 188 by a cam 218 acting through a rod 209 on which a curved member 208, secured to the member 188, is adjustably mounted. The connection between the curved member 208 and the member 188 is resilient to prevent any blockage of the movement of the member 188 from injuring the machine. The rod 209, Fig. 29, is provided with a cam surface 221 adapted to thrust outwards a lever 223 carrying an adjustable anvil 230 normally disposed in the path of the slide member 189. The slide member 188 surrounds the slide member 189 and these members move downwards together, cutting off the required length of wire, the member 189 pressing the mid-portion of the wire against the anvil 230 whilst the member 188, continuing its downward movement, bends over the side pieces. On completion of the operation, the cam 221 pushes outwards the lever 223, withdrawing the anvil 230 from the path of the member 189. At this point a length of the tab-strip is fed transversely of the strip A beneath the staple and the member 189, still moving downwards, drives the staple through the tab and the disc, a cutter 194 mounted on the member 188 cutting off the tab from the tab-strip. The tab-strip 271 is drawn intermittently from a roll 272 by a Geneva stop-wheel mechanism 257, 259 of which the actuating shaft 254 carries a cam 255 adapted to oscillate a lever 244 to raise a spring-pressed rod 240 slidable on the base plate 2 of the machine. This rod raises two spring-pressed levers which clinch the ends of the staple beneath the strip A. The strip is next moved to the part G where the staple, disc, and tab are pressed closely together by a hammer 279 actuated by an ecentric 280 through an adjustable pitman 305. Finally the disc is punched out by the mechanism H, which comprises a die 299 guided by vertical posts 295 and secured to a slide 301 adjustably connected to an eccentric 303 on the shaft 5. The die 299 carries a cutter 306 which severs the waste portion of the strip left by the preceding disc.