Patent GB-443108-A (GB)
Title: Improvements relating to the manufacture of paper and like containers
IPC: B31B17/00
Filed: 1934-08-18
Abstract: 443,108. Making paper &c. containers. WOOLLIN, H., 72, Blenheim Road, North Harrow, Middlesex, and KARTLES, Ltd., Farleigh House, Lawrence Lane, London. Aug. 18, 1934, No. 23894. [Class 18] The invention concerns the manufacture of paper &c. bottles &c. of wedge &c. shape and relates particularly to a two-part plunger for the insertion of one or more flanged caps within the open ends of the bottle &c. bodies. Receptacles 2, carried by the plates 27 of an endless conveyer 1 which runs in tracks 34, each contain the folded body of a paper &c. bottle. The conveyer is moved intermittently by a camoperated lever 36 and a pawl 41 which is adapted to engage the rear edge of each of the plates 27. Overrunning of the conveyer is prevented by a tooth 44 carried by a lever 42, the knuckle 45 contacting with a plate 46 to lift the tooth 44 so to allow the pawl 41 to move the conveyer forwardly. When each receptacle 2 comes beneath the devices 4, 75, which insert the flanged end closures, cam operated fingers 47 engage beneath the appropriate plate 27 to lift the same into contact with a recessed plate 28 and maintain the same in that position during the closuring operation. The closure applying heads 4, 75, each comprising a double plunger device 6, 7 formed with coacting triangular portions 21, with flattened apices, are reciprocated by a cam through rods 77, rollers 80, effecting positive raising and lowering. The plunger 6, 7 descends, as in Fig. 8, and a ring 19 coacting with a ring 23 severs a disc from a paper &c. web 20, fed intermittently by rollers 22 through a gear 93, and positions the same on a surface 26. Pins 8 moving in slots 9, 13 in the stationary casing 10, Fig. 4, of the device 4, now effect a partial rotation of the plunger 6 which carries a tool 15. The plunger 7 bears upon the cut-out disc of paper &c. 5, whilst the tool 15 in further downward movement flanges the disc 5 and by its rigid side wall presses it into the mouth of the bottle &c. A series of pivoted curved fingers 48 carried by the plate 28 are now moved by cam action, through a lever 60 and trip device 68, 68a, to contract and press inwardly the mouth region 30 of the body of the bottle 3, Fig. 10, and then to open again. The upper plunger 6, 15 is now raised, but a plate 17, enclosed within the tool 15, and actuated by a rod 18 under the control of a pivoted lever 82, cross-bar 84, and pin 85, remains in contact with the disc closure 5, 5a to prevent the same from being disturbed by the removal of the uppermost plunger. The fingers 48 are again contracted to restore the mouth 30 to the position of Fig. 10, when the plunger 6, 7 has been removed. On the next feeding movement of the conveyer 1, the device 75, similar in all respects to the device 4, inserts a second closure disc, which may have a central aperture, to press firmly the edge 30 of the bottle body between itself and the flange 5b. The bottles are then ejected by a cam-operated striker device 96, 97 to a shoot 95 from which they are removed and waxed. A spring-biassed pivoted lever 70 carrying a cam plate 73 and formed with a notch 74 adapted to coact with the respective pins 8, assures that the lower and upper plungers 6, 7 do not move upwardly together until the apices of the triangular portions 21 are in the position shown in Fig. 8, and thus are ready for the next down-stroke.