Patent GB-301643-A (GB)
Title: Improvements in automatic wrapping machines
IPC: B65B25/14
Filed: 1927-11-28
Abstract: 301,643. Jones, C. H. le P., and Hussey, W. J. Nov. 28, 1927. Packeting by wrapping - up. - Relates to machines for wrapping cylindrical articles of considerable size, such as rolls of newsprint. End pieces are first applied to the ends of the article, and a wrapper, notched at the edges, is wound round the roll, the flaps formed by the notches being turned down over the end pieces and interlocked. Bands embracing only the end of the article and with similar flaps are next applied, and outer end pieces added to make a package as shown in Fig. 28. Feeding articles to machine. The rolls Rare fed by a conveyer 2 on to an inclined carriage 3, Fig. 1, adapted to run transversely on guides 4. Centering devices 6, Figs. 1 and 6, align the roll while passing over the carriage 3. The devices comprise a number of bell-cranks 6 pivoted at 7 and carrying rollers 6<a>, 6<b> spaced apart at right. angles. A spring 9 normally holds the devices in the position shown in full lines in Fig. 6, and, if a roll R is not in central alignment, it engages the roller 6<b> and rocks the crank so that the roller 6a engages the end of the roll and pushes it, with the carriage 3, sideways into alignment. When the roll has passed from the carriage on to carrier rollers a, a<1>, a pendulum 5 returns the carriage 3 to a central position. The frame 1, Figs. 1 and 3, of the machine comprises a number of transverse guideways upon which side frames 1<a>, 1<b>, carrying various parts of the mechanism, are mounted for simultaneous adjustment so that rolls of various lengths can be dealt with. Feeding and applying inner end pieces. The roller a, Figs. 1 and 7, is constantly rotated, and the roller a<1> is mounted in bearings a<5> in vertical guideways a<4> adapted to be raised and lowered by cams a'. When the roll is resting on these rollers, the inner end pieces i, Figs. 1, 3 and 26, are applied to the ends of the cylinder. The pieces are carried at opposite sides of the machine in inclined magazines i<2>, one of which is shown in Fig. 3, and are pressed against feed rollers i<4> by followers i<3>. The circumference of the feed rollers i<4> is slightly greater than the diameter of a head piece, and, at each revolution, a projection i<6> on the roller engages a hinged flap on the magazine and momentarily holds the stack in spaced relation to the roller; when the projection moves away the front end piece is fed on to a plate i<5>. The rotation of the feed mechanism is controlled by clutch mechanism operated by the passage of a roll over a trip arm 11, Fig. 1, normally projecting through the carriage 3. The plates i<5> are operated from a shaft i' to move from the position shown in full lines, Fig. 3, to that shown in broken lines, to apply the piece to the end of the roll. A cam piece i<21> retracts the lower part of the plate against the action of a spring on the return movement so as normally to prevent contact with the roll R as it passes into position on the rollers a, a<1>. Feeding, notching, gumming, and applying wrappers. Supply rolls of the wrapping material B, Fig. 1, are mounted on a reel B<1> and a web of the appropriate width is drawn therefrom by bands B<56>, B<57>, which guide it to rubber-covered feed rollers B<2>, b<2>, Figs. 1 and 3. At each side of the machine are mounted notching blades B<5>, b<5>, adapted to co-operate with an opening in the support B<3> to form the flaps shown at each edge of the wrapper in Fig. 26, the blades being so timed as to pass one at a time through the edges. A reciprocating knife B<7>, Fig. 1, then severs a length from the web and gum is applied from a trough B", Figs. 7, 20 and 29. A series of gum rollers B<10> is carried by arm B<14> on a shaft B<17>. The rollers are normally urged by springs B<41> to pass through openings B<13> into contact with the wrapper B as it passes between the trough and a platen B<50>. The movement of the rollers is controlled by a clutch thrown into action by the knife mechanism and the time during which they are in contact with the wrapper is adjustable. The width of the gummed portion is varied by moving shutters B<49>, Fig. 20, to close certain of the openings B<13> at the ends of the trough so as to prevent the corresponding rollers B<10> from coming into contact with the wrapper. The wrapper is now guided by tapes 25<a>, 26, Fig. 7, and a guide arm 27 into the nip between the roll R. and the carrier roll a<1>. The guide arm 27 is mounted on a spindle 30 and is moved from the position shown in broken lines, after the previous roll R has been removed to the left. The notched ends of the wrapper are turned in upon the ends of the roll by folders i<5>, Figs. 1, 26 and 27, the curved upper edge 32<a> of a slot 32<b> casing the flaps to overlie the inner head piece. The flaps may be interlocked by forming a slit in the forward end of each flap near the free end, bending the end outwardly by a wedge 32d so that the slit straddles the adjacent edge of the preceding flap. Applying secondary wrappers. Band wrappers b, Fig. 28, comprising narrow adhesive strips are also supplies as shown to strengthen the ends of the wrapping. The bands are notched similarly to the body wrapper and the flaps are turned in by the devices 32<a>, 32b. The free ends of the wrapper B and the bands b are guided round the upper portions of the roll by tapes 36, 37, 38, Fig. 7, mounted on rollers on an arm 33, having pivoted sections 34, 35. The arms are moved from the positions shown in Fig. 1 to those shown in Fig. 7 on the arrival of the roll R from the carriage 3 by the roll engaging a roller 47b on a bell crank 47 connected with the arms 33 - - 35. A guide comprising bars 127 on which endless tapes 130 are mounted also rises from the position shown in broken lines and supports the wrapper in this position. Feeding and applying outer end pieces. End pieces o. Fig. 28, are now applied to protect the flaps. In order to move the roll into position opposite the magazines o<2>, Figs. 1, 3 and 13. carrying the pieces, the supporting roll a' is moved downwards and a tilting table 54 is operated so that the roll runs down a runway 50 leading to a conveyer 51. sheet metal walls 33 engaging the flaps during the passage. A feed roller o<4> feeds a head between a constantly rotating drum o<8> and an adjustable concave platen o<53>. An annular pad o on the drum applies a ring-shaped band of adhesive to the piece o from a roller o<12> in a trough o<13>. The piece is carried down bv rollers o<17> and endless chains o<16> to a guidewav adjacent an endless band 70 between which and the end of the roll it is nipped and carried away. The roll is then weighed and discharged.