Patent GB-811913-A (GB)
Title: Improvements in or relating to wrapping machinery
IPC: B31B1/90
Filed: 1955-06-03
Abstract: 811,913. Wrapping machines; making wrappers. JACKSON, D. R. P., and MOLINS MACHINE CO. Ltd. May 30, 1956 [June 3, 1955], No. 15993/55. Classes 94(1) and 94(2). In a machine for forming and applying cigarette wrappers provided with a lifting strip having one end projecting through a slit, a web 1 of wrapping material, e.g. metallic foil, is fed from a reel 2, Fig. 1, through rollers 11, 12 which form the slits S, S1 and S2, Fig. 4, and a narrow strip 3, e.g. of regenerated cellulose is fed from a reel 4 over guide rollers 5, 6 and a segmental roller 7 which applies adhesive to spaced portions thereof. The web and strip are pressed together as they pass between rollers 8, 9 and the resulting composite web W is led over a guide roller 13 and between rollers 14, 14a which form the creases shown in Fig. 4. The web W then passes on to the surface of a drum 15, against which it is held by suction applied through ports 150, and is severed along the line C by cooperating knives 16, 16a to form wrapper blanks each having an attached strip 3 whose loose end overlies the slit S. The drum 15 has two narrow recesses 180 in its periphery, spaced 180 degrees apart, and the feed of the web on to the drum is so timed that a slit S lies over each recess. A member 19 is slidable radially in a guide 190 rotatable about the axis of the drum and carries a blade 18 and a resiliently mounted presser 25. The member 19 is urged inwardly by springs 19a and is fitted with a roller 20 engaging an arcuate cam 21 which is pivoted at 22 and has a tail-piece 23 carrying a roller 24 engaging a rotary cam 240. The guide 190 is formed with a gear segment 30, Fig. 2, which meshes with a gear segment 31 on a continuously rotating shaft 36 and is coupled by a chain 192 to a return spring 191. The arrangement is such that the guide 190 is rotated at the same speed as the drum in a clockwise direction when the slits is positioned under the blade 18, and the cam 21 is simultaneously swung downwardly so that the presser 25 engages the strip 3 and the blade 18 thrusts the loose end of the strip through the slit into the recess 180. After 82 degree movement, the teeth of the gear segments disengage, the cam 21 is swung upwardly to retract the blade and presser and the guide 190 is rotated anticlockwise by the spring 191 so that it returns to its original position, this return movement being controlled by the engagement of a wedge 32 on the gear 30 with a wedge 33 on the gear 31 as described in Specification 811,914 [Group XXIV]. The blank then passes under a roller 26 and suction is cut-off from the ports 150 to allow it to pass through guides and an opening B in the bed of the machine for engagement by a batch of cigarettes moving along the bed. The blank is then folded and secured around the batch to form a blockended package such as that described in Specification 780,210. The ports 150 are formed in a detachable sleeve 151 which may be interchanged with sleeves having differently arranged and spaced ports to suit webs of different width. The shaft 36 also carries a sprocket 37 driving a chain 38 which passes over sprockets rotatable with the roller 7, cam 240, roller 11, roller 14 and drum 15 and also over guide sprockets 39, 40.