Patent GB-191424123-A (GB)
Title: Improvements in Machine for Assembling Metal Receptacles.
Inventor: RICHTER HANS FRITZ
IPC: B21D51/26
Filed: 1914-12-15
Granted: 1915-12-15
Abstract: 24,123. Richter, H. F. Dec. 15. Angular bending; bending-dies. - In a machine for attaching hinged covers to metal receptacles, such as cans, boxes, &c., the bodies and covers are separately fed automatically and are moved laterally to bring the hinge members adjacent to one another, and the hinged members are then interengaged and clinched together. The bodies A, Fig. 3, are fed along a pair of inclined guides 28, 29 by a bar 30 provided with spring-pressed fingers 31, and are then fed along an inclined guide 32 by a bar 33, Fig. 6, carrying cross-pieces 41 provided with pivoted fingers 42 held in contact with stops 44, Fig. 4, during the forward movement of the bar by springs 43. The bar 33 is operated by a link, lever, and connecting-rod from the driving shaft. The bodies are held in engagement with the fingers 31, 42, so as to allow a limited lateral movement, by friction bars 47, which are preferably covered with felt 48 and are carried by hinged arms, the pressure on the bodies being regulated by screws 50 threaded in arms, which may swing away from the bars to prevent access to the guideway when desired. The covers B are fed to an inclined hopper 45 by a pair of belts 55, 58, the pulleys 56, 59 of which are driven by a belt 63, passing over idle pulleys and over the pulleys 61, 62. The hopper receives a pair of covers in superposed position, the hinge tongue-pieces b of the lowermost of which rest in a groove 77, Fig. 11, in a die-block 76. To prevent the covers from sticking in the hopper, they may be pushed down by a finger 104, Fig. 3, on a spring retracted lever 101, which carries a pin 103 engaged by the clinching- ram 22, Fig. 11. During the rearward motion of the feed-bar 33 a cam 74, Fig. 3, thereon engages a lever 73 so as to press forward a spring-retracted pusher 68 and thus to move the body into the cover in such a position that it rests on the tongue-pieces b, Fig. 14, with the pintles a, Fig. 15, carried beyond the tongues. In a subsequent forward motion of the bar 33, the body and cover are relatively moved so that the tongues engage with the pintle and are transferred into a position underneath the clinching-dies 26, Fig. 11, the body being held in position by a spring pusher 75, Fig. 3. During the downward motion of the clinching-ram 22, a slotted bar carried thereby is arranged to operate a slotted lever 80 so as to press forward a pair of bars 83, which engage the end of the body and force it back, so that the openings a<1> beneath the pintles a engage the tongues on the cover. The curved end of the die 26 then completes the hinge. On the next movement of the bar 33, the cover engages a cam-surface 89 so as to close it partly over the body, the completion of this operation being effected by a roller 90 carried by a lever 91, which is spring-controlled, so as to prevent damage in case the cover cannot be closed on the body. The closed receptacles finally come in contact with an inclined plate 94, which gives them a quarter-turn, so that they drop down an inclined shoot 46 on to an inclined table 96. They are fed along the table by a plate 95 operated by an arm 99 on a slide bar 97 reciprocated by a rock-shaft, on which the lever for the feed-bar 33 is mounted. The machine may be operated in conjunction with the machine for forming beads on the open ends of the receptacles.