GB1216310A - Reel change and splicing device in apparatus for feeding strip material to machines - Google Patents

Abstract

1,216,310. Feeding webs. HAUNI-WERKE KORBER & CO. K.G. 17 July, 1968 [10 Aug., 1967], No. 36810/67. Heading B8R. In apparatus for splicing the leading end of a strip or web from a new reel 3 to a strip or web 11 from an expiring reel 2, the leading end of the new web is attached to the end of an auxiliary strip 10 which is driven to rotate the reel 3 up to a speed corresponding to that of the old web 11, and means on the attachment end of the strip 10 coact with other parts of the apparatus to effect splicing and the severance of the old web 11. As shown, the bearings of the reel 2 are secured by bolts 9 to the upper end of a supporting guide 1 and the web 11 passes between inoperative cutters 12 and spring-pressed splicing rollers 14, 16 to rollers 17, 18 feeding it to a cigarette or cigarette-filter making machine. To prepare for splicing the auxiliary strip 10 is threaded from a container 26 between guides 5a, 5b, normally-spaced apart rollers 19, 21 of which the roller 19 is driven at the same speed as the rollers 17, 18, between guides 13a, 13b, through the rollers 14, 16 and between guides 15a, 15b. A cross-bar 44, Fig. 2, is attached to the end of the strip 10 by a fold as shown, and one or more turns of the strip 10 are wound around the reel 3 with the bar 44 engaging notches 48a in the rims of the reel spool. At the same time, the strip 10 is attached to the leading end 43 of the web on the reel 3 by a strip 47, Fig. 2, coated on both sides with adhesive, the end 43 being provided with a perforation 46 for this purpose. The reel 3 is now mounted in the guide 1 and its bearings secured by bolts 8. A feeler 38 engages the reel 2 and, when the reel is nearly exhausted, closes contacts 41, 42 to energize an electromagnet 24 moving a spring-retracted lever 22 so that the roller 21 is moved towards the driven roller 19. The strip 10 is now fed forward by the rollers 19, 21 so as to rotate the reel 3 and feed its web forward at the speed of the web 11. As the bar 44, Fig. 2, passes between the rollers 14, 16, it moves roller 16 downwardly. An arm 33 on the lever 34 carrying the roller 16 normally holds a knife 29, pivoted at 31, in inoperative position, but downward movement of the roller 16 causes the arm 33 to release the knife 29 which under the action of a spring 20 moves to engage a fixed blade 28 and sever the web 11. The pressure between the rollers 14, 16 also causes the leading end of the reel 3 to adhere to the web 11 by means of the adhesive strip 47. The joined webs now pass to the feed rollers 17, 18 whilst the strip 10 is detached therefrom and diverted to guides 13a, 13b and into the container 26. Subsequently, the reel 2 is removed, and the reel 3 raised to the position previously occupied by the reel 2. To permit of the latter operation, the guide 15a is temporarily removed, and the guide roller 25 is temporarily swung out of the way about a pivot 45. At the same time the knife 29 is reset by hand to inoperative position so that the apparatus is now ready for the insertion of another new roll. In place of the bar 44, Fig. 2, a strip of rubber, leather or plastic may be used if it adheres sufficiently to the leading end 43 to ensure feeding of the new web. In a modified apparatus, Fig. 5 (not shown), rollers (114, 116) are moved together by an electromagnet to effect splicing and the catch holding the knife (129) inoperative is released by another electromagnet, the circuits of the electromagnets being closed when the bar 44 during its movement engages a pivoted member (183) situated beyond the rollers 14, 16 in the direction of feed. The rollers (114, 116) effect splicing by a punching or crimping operation. According to a further modified construction (Fig. 7, not shown) employing splicing rolls (214, 216) and feed rolls (223, 224) for the auxiliary strip, and operating somewhat similarly to the rolls 14, 16 and 19, 21, Fig. 1, the fixed and movable knife blades (234, 233) are carried by a pivoted support which is normally latched with the blades parallel to the direction of web feed. Operation of a feeleractuated electromagnet (271) such as 24, Fig. 1, causes engagement of the feed rolls (223, 224) for the auxiliary strip, and release of the latch holding the knife support. The latter is now moved by a spring so that the blades lie at right angles to the web path. Operation of the movable blade to effect cutting is caused when the bar 44 passes between the splicing rollers and moves one of the rollers (216), such movement being transmitted to the movable knife by a lever connection. Rollers 52, 53, one of which is driven, may be brought together to feed the auxiliary strip 10 from the container 26 to the operative position shown in Fig. 1. A device may be provided to brake the strip 10 as it is entering the container. Longitudinal tension control.-In each construction, a feeler lever engaging the web may control a brake on the reel to control web tension. Web rolls and spindles.-A shaft 54, Fig. 4, supporting a reel such as reel 3 has fixed thereto a side disc 51a and a collar 56. The core 61 of the reel is supported on the collar 56 and on a coned member 58 keyed to the shaft 54 and carrying the second side disc 51b. The coned member 58 is pressed against the core 61 against the action of a spring 62 by means of a screwed member 63 engaging a threaded part 57 of the shaft 54.