Patent GB-546489-A (GB)
Title: Improvements in or relating to the manufacture of seamless containers
IPC: B21D24/00
Filed: 1940-06-21
Abstract: 546,489. Feeding articles in succession. CROWN CORK & SEAL CO., Inc. June 21, 1940, No. 10723. Convention date, June 22, 1939. [Class 117] [Also in Groups XXII, XXIV, XXV and XXXIV] Partly cupped blanks 66 roll down an inclined shoot B<SP>1</SP>, Fig. 10, opening into the side of a magazine B having a partition 68 so that two stacks of blanks accumulate. A rock shaft 82, Fig. 4, is actuated through a rod 73 and lever 59 from a cam 58, and operates fingers 85, 87 acting through guides 87 to form an escapement delivering blanks in pairs to be located by recesses 69a, Fig. 6, and a gate 70 in position to be advanced through the machine step by step by a reciprocating conveyor bar. If the lubricating device for the work is out of action a dog 90, Fig. 4, engages a shoulder 89 and prevents delivery of blanks, the spring 79 yielding when the lever 77 is thus locked. The blanks are sprayed whilst in the magazine B or alternatively or additionally at 110 on the line 2-2, Fig. 10, and by arms projecting from a pipe 116 over the drawing stations. The pipe is carried by arms 117 pivoted at 118, Fig. 27, and when the arms are raised to carry the pipe out of operative position a roller 120 on the end of it leaves a cam surface 121, Fig. 6, and permits a spring to move a lever, carrying the cam, to shut off the oil supply. At the same time cams 128, Fig. 4, are moved from rollers 130 permitting a spring 131 to rock the lever 90 and stop the blank feed mechanism. Lubricating at 110 is preferably employed in conjunction with a modified blank locating mechanism employing pins and a swinging gate. In this case the rock shaft 82 is operated by a lever mounted between friction washers to permit yield when the escapement is locked and the supply of oil to the U- shaped spray pipe is controlled by a spring- closed valve opened by a tappet on the lever. Oil collects in a sump 13, Fig. 27, and is strained at 802 and recirculated by a pump 801 geared to the rear cam shaft. The blanks are received by fingers 190, Fig. 14, on the bar 134 sliding in guides in members 140, Fig. 10, carried by bell cranks 141 pivoted to the bed. The bell cranks are coupled by a rod 144 adjustably spring loaded at one end to balance the bar 134 together with the blanks and associated parts. The rod is connected at the other end, to impart a rise and fall motion to the bar, by a link 151, to a compound lever 106, 106<SP>1</SP>, Fig. 14, pivoted at 152 and carrying rollers 107, 107' engaging separate cams to ensure positive movement in each direction. The lever arms are relatively adjustable at 156. The bar 134 is linked, for the horizontal transfer movement, at 160 to a slotted lever 163 swinging about a locked shaft 164 ; the slot receiving a roller 57 on a crank pin 56 on a transverse cam shaft 52, Fig. 3, geared at 51 to the rear cam shaft. The slot in the lever has arcuate parts 166, 167, Fig. 14, to give dwells at the ends of the movements during which' the rise and fall movements occur. In order that the mechanism may be positive in action, the arcuate portions are covered alternately by auxiliary members 168, 169 carried by levers pivoted at 170, 171, and linked at 172 to a member 174 keyed to the locked shaft 164. The position of the levers 170 is adjustable at 188. Two opposed pairs of fingers 190, Figs. 17 and 18, are provided for each blank holding station and the fingers have cam ends 199 to permit separation when engaged by the die parts of the machine. For this purpose the fingers are pivoted at 191 and are normally held with their ends 193 against stops 194 by springs 197. The blanks rest upon an opposed pair of fixed projections 202<SP>1</SP> and on a movable projection 200<SP>1</SP> carried by a finger pivoted at 201 and held against a stop 203 by a spring 203<SP>1</SP> when not cammed down by the tools at 205. These fingers are particularly designed for use at cupping stations and modified fingers are designed for use at other operative stations. In the case of a machine when the blanks are treated singly instead of in pairs a further modified form of fingers is described co-operating with supports additional support immediately prior to the projecting from the fixed die members to provide engagement of -the blanks by the moving dies or punches and also at the time of disengagement. Specification 510,370, [Group XXII], is referred to.