Patent GB-144387-A (GB)
Title: A method of, and means for mechanically applying closure lids to tins, cans, and thelike
IPC: B21D51/26
Filed: 1919-03-11
Abstract: 144,387. Elgy, V. C. H. March 11, 1919, Stoppering.-In closing or sealing cans or tins, a lid c, Fig. 2, and a can &c, b are brought to an assembling position C with the lid inclined to the mouth of the can, and a portion of the inner face of the depending flange of the lid engaging a portion of the rim of the can. The lid is then turned relatively to the can and afterwards pressed home thereon. Apparatus comprising one or several similar units may be used. The cans b may be fed forward singly from a shoot a by means of a reciprocating recessed' pusher or plunger g, which controls a latch h governing the delivery of the cans from the shoot. The front end portion g<1> of the plunger is notched and shaped to embrace the rearward portion of a can, and the lids are fed gravitationally down a shoot d to an inclined table e, whereon they are retained in the assembly position C by spring-controlled fingers i. The plunger g moves the can and the lid thereon past these fingers, and the lid is turned relatively to and pressed down on the can by a closing-device comprising an inclined plate l, which may be pivoted at its rear end, and be acted upon by adjustable coil springs l<2> at its front end. On completing its forward stroke, the plunger delivers the closed tin to a discharging outlet at the end of the guideway. The process may be reversed, lids being fed to cans delivered by the shoot d. A modification is described wherein the reciprocating plunger is replaced by an endless conveyer band carrying canconducting members, and several such bands side by side may be employed, the conducting members on one band being in staggered relation with those on adjacent bands. In another modification, a wheel on a driven shaft replaces the reciprocating plunger. A further modification is described wherein the lids c. Fig. 7, are turned on to the cans b and closed thereon by a closing- member r, which is hinged to a spring-controlled base-piece r<1> and is caused by cam action to move into the position shown in dotted lines as it is moved to the right, thereby causing the lid first to turn on and then close upon the cam. Upon the return movement of the reciprocating plunger, pawls t are rocked thereby and engage a depending flange e<1> of the table e, which is thus rocked to the position shown in dotted lines to allow the closed can to pass under the table. The can comes into engagement with and is arrested by the flange e<1>, and finally falls through an aperture f<5> in the floor f<2> of the slideway into a delivery shoot f<7>. The feed of the lids is controlled by pawls or fingers v. A further mcdification is described wherein the table e, Fig. 9, is fixed and the closing-member w is moved forwards by the assembled lid and can against the action of a spring-controlled rod w<2>, and is turned down on the lid and can by pins engaging cam-slots f<7> in the sides of the frame f, the closed can passing under a spring blade. The cans may be fed forwards by a reciprocating pusher g as shown, or by an endless band or a wheel.