Patent GB-682755-A (GB)
Title: Improvements in or relating to double seaming machines for the manufacture of steel barrels or drums
IPC: B21D51/32
Filed: 1951-05-02
Abstract: 682,755. Seaming. RHEEM MANUFACTURING CO. May 2, 1951 [Sept. 20, 1950], No. 10325/51. Class 83 (iv). A machine for seaming steel drums or barrels comprising a pair of chucks, one axially movable, to hold the drum during seaming, is characterized by a drum-feed carriage adapted to reciprocate below the chuck axis and transverse thereto and means, responsive to the inward and outward chuck movement, to lower and raise said carriage. With the machine in the position shown in Fig. 7, and one drum B fust finished and another C on rollers 58, of the carriage 47 ready to be seamed, the cycle of operations begins with the piston rod 19, Fig. 1, moving up thus braking a toggle 20, 25 and moving the standard 13 carrying the chuck 14 to the right. This movement, by means of linkage 74, 71, 70, &c. causes spring-pressed rollers 79 to move down, one on to the drum B, Fig. 7, held by the chucks. The link 25, Fig. 1, also lifts a rod 30, turns a lever 32 clockwise, moves a rod 35, Fig. 2, to the right. Adjustable nuts on the rod 35, after an interval, engage lug on a bar 37 and move it also to the right, thus rotating levers 56, Fig. 1, pivoted at 57 counter-clockwise and lifting rods 50 carried by pivoted arms 55, Fig. 5, and the carriage 47, slidable thereon, until rollers 59 engage the drum B now released from the chucks by the roller 79. The elevation of the rods 50 causes a lug 65, Fig. 5, to rise thus allowing the rise of an arm 64 extending from a shaft 63, mounted in the framing 10 of the machine and thus allowing arms 66 and rollers 62 to fall and deposit a preseamed drum A on to saddles 89 mounted on the carriage 47. The elevation of the rods 50 also allows a switch 53, Fig. 5, to open and move a solenoid-operated valve 52, whereby the rod of a pneumatic cylinder 51 moves the carriage 47 to the right with the drums A, B and C. The still rotating drum B at the end of its advance engages the second roller 79 which holds it on the rollers 59 as the carriage stops. At the end of the stroke of the bar 37 a pin 45, Fig. 2, clears the face 44 of a latch 42 which falls, as shown, to prevent the carriage 47 from moving down until the latch 42 is released. The rod 19 is then moved in the reverse direction causing the chucks to grip and rotate the drum C, rolls 15 being operated in known manner to effect seaming. This movement of the rod 19 turns the lever 32 counter-clockwise, Fig. 2, and during the first part of this movement the rod 35 merely slides through the lug of the bar 37 which is held by the latch 42 but near the end of the movement of the lever 32 a lug 39 thereon engages a stop nut 41 on a rod 40 connected to an upward arm 142 of the latch which is thus turned to release the pin 45 and allow the carriage 47 &c. to fall, the drum C being held by the chucks 12, 14. This falling movement deposits the drum A on the saddles 89 on to conveyer rails (not shown), moves down the lug 65 and arm 64 thus raising the rollers 62 to lift the seamed drum B off the rollers 59 and then closes the switch 53 causing the rod of the cylinder 51 to move the carriage 47 to the left. The rollers 62 preferably have high friction bearings to bring the rotating drum B to rest while the next drum C is being seamed. A fresh drum assembly ready for seaming is then placed on the rollers 58 and the cycle repeated.