Patent GB-138759-A (GB)
Title: Improvements in and relating to machines for forming cigarette paper tubes and the like
IPC: A24C5/46
Filed: 1919-04-03
Abstract: 138.759. Molian. D. April 3. 1919. Paper tubes.-A machine for making cigarettepaper tubes, of the kind in which a strip of paper is fed over guide-rolls and a pasting-device and is bent into tubular form by a former and passed through a circular guide which completes the tube, and is then acted on by a revolving roller which finds the paste and is finally cut off into predetermined lengths, is constructed so as to feed the paper through in a steady manner by arranging separate driving-trains for the feedrollers and for the printing and bronzing rollers which act on the strip before it is formed into a tube. The machine is also fitted with a cutting- device which travels with the tube and at the same speed during the cutting operation, the cutters being of the scissors type and being capable of adjustment vertically and angularly so as to suit different sizes of tubes and to permit the angle of cut to be varied. The bronzing- apparatus comprises a plurality of wiping rollers or brushes of different sizes and driven at different speeds. As shown in Fig. 1, the strip is fed from a reel m<5> and passes over guide-rollers a<1>, a<2> to an impression roller a', where it receives an impression from an engraved roller b, and the strip, with the wet impression, passes to a bronzing-roller c, after which the paper passes over a plate c<4> and is acted on by wiping-brushes c<1>, c<2>, c<3> driven at different speeds. The paper then passes over rollers a<5>, a<6>, a<7>, of which the roller a' is adjustable so as to enable the strip to be registered longitudinally, and feed-rollers a<8>, a<9> then pass the strip over a roll a<10> to a roll a<11>; in its passage between these, it passes over a pasting-roll d. The strip then passes through a second similar printing-device, and then to the tube-former f<10>, through a ring h<1>, and pressing-roller j<31>, f<12>, the roller f<12> being carried in the former f<10>. The tube is finally cut into sections by scissor-like plades g<14>, g<15>, which are arranged to be moved at the same speed as the tube during the cutting action, and are vertically adjustable for dealing with tubes of different sizes, and are angularly adjustable to permit the angle of the cut to be varied. The various parts of the machine are driven from a shaft j<3>, Fig. 5, driven by a belt which may engage a fast or loose pulley j<4>, j<5>, a fly-wheel j<6> being mounted on the shaft. The shaft j<3> is geared to the shaft j<30> of the feed-roller a<8> through changeable spur gears j<7>, j<8> and two others (not shown) which actuate the shaft j<30> through mitre gears j<17>, j<20>, j<24>, j<25>. The shaft j<3> is geared by separate trains of helical gearing to shafts l<9>, l<10> on which the printing-rollers are mounted, these being geared by spur-wheels l<11> to the inking- rollers, and to a shaft k<10> from which the bronzing roller and brushes are driven. these being geared together in such a manner that the brushes have different surface speeds. The ink ducts b<5> are mounted in pivoted arms controlled by springs and screws b<6>, and the ink is transferred from the duct or rollers b<4> by oscillating messenger rollers b<3> to distributing-rollers b<2> which are reciprocated transversely by cams on the shafts of the rollers b<4> and levers b<8>. Rollers b<1> transfer the ink from the distributing-rollers to the printing-rollers which screw on the shafts l<10>, l<11>. The paste roller d is driven by the same train as the feed-roller, through a pin-and-slot drive which permits the wheel d and its container d<1> to be adjusted laterally. The amount of paste applied is adjustable by a screw-operated plate d<2> formed with an aperture through which the wheel d passes. The strip can be moved out of contact with the wheel d, when desired, by means of a. lever f<1> which can be made to move a pivoted frame f away from the wheel d, the roll a<11> being mounted in the frame f. The former f<10> is mounted in a frame f<8> pivoted about a screw which engages an extension f<11> of a bracket f, Fig. 3, carried on a bracket g<2>. The frame f<8> is controlled by a spring f<6> the tension of which can be regulated by a screw f<2>, and lever f<4>, a lock-nut f<5> holding the devices in the adjusted position. The size of the tube formed is determined roughly by the size of a ring h<1> through which the tube passes, but this size may be varied within limits by controlling the tension of the spring f<6>, which varies the pressure between a roller f<12> mounted on the former f<10> and a freelymounted roller j<31>. By increasing the tension of the spring, tubes of slightly smaller size are obtained. The cutting-devices g<14>, g<15> are mounted in a bracket g<11> which is vertically and angularly adjustable in a split boss on a rod g<7> which is reciprocated by a connecting-rod g<5> and a crankpin g<4> on a gear-wheel g<1> driven by an eccentric gear-wheel g. The cutters are oscillated by a vertically reciprocating rod g<12> guided by the rod g<7> and formed with rollers g<13> which act on the spring-controlled blades. The rod g<12> is adjustably connected to a lever g<9> oscillated by a cam g<4> on the wheel g<1>, this cam being adjustable so that the time of closing of the blades may be adjusted, and therefore the speed at which the cutters travel can be made to agree with the speed of the tube being cut.