Patent GB-190405934-A (GB)
Title: Improvements in Can Making Machines.
Inventor: REHFUSS JOHN GEORGE
Filed: 1904-03-10
Granted: 1905-03-09
Abstract: 5934. Rehfuss, J. G., and Rehfuss, M. O March 10. Shearing; stamping;flanging; bending soldering; metal, sheet, beading and seaming.- In a machine for making the bodies and ends of cans, a pile of metal sheets E, Fig. 6, is fed to the machine, and a magnetic device picks up the sheets separately and passes them to shearing-blades to be cut into strips, as shown in Fig. 7, equal in width to the length of the body. From these strips, the ends are stamped and simultaneously flanged, the waste pieces are cut off, and the part for the body is crimped along, its edges, these operations being shown respectively in Figs. 7, 8, 9, 10, 11, and 12. The body is next bent round a mandrel, the seam is completed by dies, and soldered, and the completed body is then discharged to another machine in which the ends are attached. The pile of sheets E, Figs. 15 and 25, is placed on a carriage A<4> which slides upon shoulders A<5>. The sheets are partly supported by antifriction rollers A<3> mounted on stationary pivots. Bv means of the pivoted lever B<20>, cam B<1> on the driving-shaft A, and a clutch B<3>, operated by means of the link B<4> and an arm B<7> journalled on a shaft B<6>, the pile of sheets is moved forwards periodically to a position beneath the fingers C', which lift the sheets singly. Preferably, each pile contains one hundred sheets ; a worm-wheel B<10> then has one hundred teeth, so that a notch B<8> in the wheel B<9> receives the end of the lever B' when the shaft A has made one hundred revolutions, and throws the clutch B<3> into gear. The crosshead C<1>, carrying the magnetic fingers C<3>, is depresed by means of the rod C, pivoted lever C', C<8>, and the cam D, and is held in the raised position by means of a spring C'. Arms carrying at their extremities right-angled brackets, and fixed to horizontal shafts, one at each side of the machine, form an extra support and guide for each plate as it passes to the rollers G, G<1>, the arms being brought into operation by means of cam and other mechanism F<8>, F<6>, F<5>, &c. The separate plates are moved to the feed-rollers G, G<1> by fingers attached to a cross-piece B<18>, on arms extending from the shaft B<6>, which is operated from the cam B<12> by means of the levers B<15>. From the rollers C, G', the sheet is fed through a second pair of rollers and over a stationary knife I<10>, Fig. 26, and is cut into the strips shown in Fig. 7 by the knife I<7>, which is operated by an eccentric on the shaft I<2>. The cut-off strips are received by pairs of rollers J<1>, J<3>, and are passed to a sprocket-chain surrounding wheels L<2>, and provided with projections L<5> to feed the strips to the various parts of the machine. An intermittent motion is imparted to the chain by means of an arm M carrying a roller which engages in turn four notches in a wheel L<6> on the same shaft as one of the sprocket-wheels. The cut-off strip is advanced beneath a verticallyreciprocating carriage o', which carries at each end a die o<2> for stamping out and flanging the top or bottom of the can as shown in Fig. 8, by engaging stationary dies fixed beneath them. The ends of the strips are cut cff by knives o' carried by a carriage o<6> and engaging stationary knives. The carriages o<1>, o<6> are operated respectively from the shafts 1<1>, I by means of eccentrics. The apparatus for crimping the ends of the strip which is to form the body of the can consists of adjustable dies P<10>, Fig. 14, working in co-operation with dies attached to arms P<12>, on shafts P' actuated by levers P', and cams P on a shaft K<3>. A rack attached to the rods U'‹, Fig. 26, holds the strips during the shearing, stamping, and crimping operations, and is actuated by means of the cam U on the shaft A. After being crimped, the strips are bent about the mandrel 1 to allow the ends to interlock. The shaft Q, Figs. 19 and 26, carries cams Q<10> engaging rollers Q<5> on forked arms Q<4> which are guided by embracing the shaft, and are connected by links Q<8> to the jaws Q', these jaws being pivoted to a central rod Q<25> which engages a cam Q<27>, so that the rod first rises to grip the strips against the mandrel, the jaws then being raised to bend the strip. After the crimped ends of the body have been hocked together, the seam is flattened by means of a slide Q", working in guides Q<12>, and operated from the cam Q<15> by means of levers Q<16>, Q <7>, Q<19>, the pivots Q<18>, Q<22> being fixed. A spring Q<40> raises the slide. Tue body is next moved along the mandrel by means of a forked slide R, operated from the cam Q<14> by means of levers R<3> R<4>, the pivots R', R<4> being fixed. From this position, it is carried to the soldering- apparatus by means of a second chain S<4>, Fig. 1, passing around sprocket-wheels S<2>, S<3>. The cam-wheel S<6> on the shaft S rocks an arm S<10>, which is rigidly connected to a shaft S<9> ; a second arm S<10> rigidly connected to the shaft is adjustably attached to a lever S<14> mounted on a pivot S<16>, and passing through the piston-rod S<18> of a pump which forces a stream of molten solder upon the seam. A spring S<25> returns the parts to their normal positions, and cuts off the supply of solder until the next body is in position. By means of a cam-wheel T, a lever T<4> on a pivot T<5>, and a fork T<6> moving in horizontal grooves in the mandrel, the can bodies are discharged to the arm W, to be transferred to another machine in which the ends are attached. A clutch mechanism consisting of a spring-actuated pin V, Fig. 14, is carried by the gear-wheel K<6>, and is inserted in the wheel V<2>, or is withdrawn as shown, according as it is desired to rotate the wheel K<6> with the shaft K<7> or leave it free.