Patent GB-685915-A (GB)
Title: Improvements in or relating to labelling apparatus
IPC: B65C9/12
Filed: 1949-04-06
Abstract: 685,915. Labelling machines. LISSIMORE, J. P. April 6, 1950. [April 6, 1949] No. 9333/49. Addition to 618,872. Class 73. An improvement in or modification of the labelling machine described in the parent Specification has a plurality of fixed pneumatic transfer members 12 mounted on an intermittently rotatable head 10 which co-operate with a label magazine 13, an adhesive-applying device 14 and an article arresting device 15 all of which are moved towards the head when it is stationary. The head 10 is adjustable vertically to alter the height at which a label is applied. The machine is pneumatically operated by an arrangement shown diagramatically in Fig. 3. The head is driven by a cylinder 20 through a pinion 25 and rack 26 and the magazine 13, adhesive applying device 14 and article arresting device 15 are reciprocated towards the head by cylinders 27, 28, 29 respectively. The latter cylinders are controlled by a main valve 30 subsidiary valve 31 and an over-riding pilot valve 33 while the head is controlled by a second main valve 34 and subsidiary valve 35. The transfer members 12 are supplied with pneumatic pressure or suction, or are exhausted to atmosphere by control valves 43 which are actuated by engagement of their rockers 44 as the various devices move towards the head. In operation, an article on a conveyer trips a lever 32 to open the subsidiary valve 33 to the main valve 30 which is so positioned as to admit pressure to the cylinders 27, 28, 29 and to advance their respective parts towards the head. As a push rod 46 attached to the article arrester advances, a projection 45 engages the rocker 44 of a transfer head to cause pressure to be supplied to blow the gummed label on to the arrested article, which is held against a resilient device which pushes it back on to the conveyer after release by the arrester. Advance of the push rod 47 similarly operates an appropriate valve 43 to produce suction to withdraw a label from the magazine. A projection 39 on the push rod 46 at the same time reverses the valve 30 to return the ports to their original position and a projection 36 opens the subsidiary valve 35 to supply pressure to the valve 34. Pressure from the valve 34 moves the piston 21 from the position shown in Fig. 3 and, in so doing, a projection 41 through a lever 40 reverses the valve 34. The piston 21 is thus moved back due to overrun, the head moving an angular distance greater than that between adjacent transfer member but pressure remaining in a pipe 61 gives a cushioning effect which tends again to reverse the piston. A ratchet system on the head engages and stops the head in the correct angular position during the first overrun of the piston. Auxiliary fixed air jets may be directed on to the edge of a label being affixed. In the Provisional Specification several additional modifications are described. In one machine, three transfer members rotate continuously engaging at appropriate parts of the cycle with a label magazine, an adhesive applying device, and an article held on a table, these latter parts moving with the transfer member while in contact therewith. In another machine, a transfer member reciprocates on an arm between a label magazine and an adhesive applying device contacting an article on a moving table on the return stroke to apply the gummed label.