Patent GB-1036135-A (GB)
Title: Improvements in or relating to cigarette making machinery
IPC: A24C5/24
Filed: 1962-04-27
Abstract: 1,036,135. Web coating apparatus. MOLINS ORGANISATION Ltd., and R. PENZIAS. April 26, 1963 [April 27, 1962], No. 16213/62. Heading D1L. Mechanism for feeding adhesive to be applied to a moving web of cigarette paper in which adhesive is fed from a container by means of a piston, comprises primary detector means operated by the movement of the piston and arranged to cause a signal (e.g. to light a lamp) when the piston moves past a predetermined position, and secondary detector means operated by the movement of the piston and arranged to stop the machine when the piston reaches a further predetermined position, whereby a signal can be given when the amount of adhesive in the container falls below a predetermined level, and the machine can be automatically stopped when the supply of adhesive in the container becomes substantially exhausted. In the device shown a web of cigarette paper 1 partly folded around a continuous tobacco filler rod 2 has adhesive applied to one edge by wheel 3 which receives adhesive from a furnishing roller 4 which in turn is fed with adhesive from a container 5 through pipe 6. The container 5 is fitted with a piston 7 having a screw-threaded shaft 8 which is threaded through a stationary nut 11 which is secured to a fixed bracket 13 such that rotation of the shaft 8 causes axial movement of piston 7. A rotatable collar 14 is keyed to shaft 8 and is connected to a concentric member 15 having a sprocket portion 16 and provided with teeth (not shown) which intermesh with teeth on the upper portion of a collar 17 rotatably mounted on nut 11 and fitted with a gear 18 meshing with a driving gear 19 connected to the main drive of the machine. Passing about the sprocket 16 is a chain 20 which also passes about a sprocket 21 keyed to a further screw-threaded shaft 22. The latter is held against upward axial movement by a spring 23. Threaded on shaft 22 is a nut 24 having lugs 25 which can slide in guideways 26 in housing 27 such that on rotation of the shaft 22 in one direction the nut 24 will move down the shaft until it reaches stop collar 28. Further rotation of shaft 22 will then force the latter upwards against the action of spring 23. Shaft 22 has a ring 29 near its upper end which engages an arm 30 pivoted at 31. Movement of the arm 30 causes an electric switch 32, which may be connected to a lamp circuit, to be operated. Further movement of the arm 30 causes a second switch 33 to be operated. This switch is connected to an electromagnetic clutch (not shown) in the main drive to the machine so that its operation automatically stops the machine. Operation is such that the rotation of shaft 19 gradually moves piston 7 upwards as to feed the adhesive to roller 4. At the same time shaft 22 is rotated through chain drive 20 thus causing operation of switches 32 and 33 at predetermined positions of position 7. A hand-wheel 34 is provided on shaft 22 and also means are provided to slightly raise member 15 out of engagement with collar 17 so that the mechanism can be rotated in the opposite direction to re-set it to its starting conditions. A portion 35 of shaft 22 is coloured red to give a further visual warning.