Patent GB-650903-A (GB)
Title: An improved machine for making hulls or shells for slide and shell cartons and the like
IPC: B31B50/62
Filed: 1948-07-14
Abstract: 650,903. Making cartons; breaking creases in cartons. OSBORN, H., and THRISSELL. ENGINEERING CO., Ltd. July 14, 1948, No. 18906. [Classes 18 and 94(i)] A machine for forming shells of drawer- and-shell cartons, comprises means for folding a blank to form a tube having an adhesively secured longitudinal seam, means for pressing and drying the seam, means for breaking the creases of the tube and means for cutting the tube into lengths and delivering the collapsed lengths, and is characterized in that rollers and allied devices forming the recreasing means are driven independently by motors or Selsyn units operated from a generator or transmitter coupled to the driving shaft of the machine. Forming the tubes.-Blanks BL, Figs. 1, 2 are fed by a roller 2 to belts 5, 6 which carry them past an alignment gauge 8 to an adhesive applying roller 12 and thence to creasing rolls 15. The blanks are passed on by belts 19, 20, 21, the belts 20 and 21 gripping them and drawing them past plates 29, 30, Fig. 2A, and rollers 36, 37 which fold up panels A and strips comprising the portions D and E of the blanks, E being a glue lap, Fig. 1, at right angles to panels B, C. Belts 40, 44 fold the parts A and D, E flat on to the parts B, C, to form the collapsed tube. A rail 33 and a member 31 of varying section, overlay the parts B, C, and ensure accurate folding on creases W and Y. The tubes are passed round a drum 51 where a belt 53, rollers 52 and, optionally, heating means, ensure the adhesion of the seam. The tubes are pressed between belts 54, 55 and carried to a conveyer comprising belts 62 and tube engaging lugs 59. Tubes from the drum 52 may be byepassed to a tray 57 by a flap 56 if required. The tubes are delivered by the conveyer to a drum 70, Fig. 8, comprising belt pulleys 72 and polygonal wheels 71, the flat surfaces of the latter enabling the tubes to be carried by the drum without transverse bending. The drum 70 gives added time for drying of the seam and delivers the tubes to a platform 116 where a reciprocating pusher 115, Fig. 8, feeds them to rollers which deliver them to the recreasing section. Recreasing.- Recreasing rollers 73-94, Figs. 8, 9F are divided into two sections, that comprising rollers 73-86 squaring the tubes and then flattening them on creases X, Z, and that comprising rollers 87-94, squaring the tubes and flattening them on creases W, Y. Thereafter belts 130 on rollers 95 deliver the tubes to the cutting and delivery devices. The rollers and pusher 115 feeding the tubes to the recreasing section are driven by a Selsyn 118 and rollers 75, 78, 81, 86, 89 and 92 and belts 130 are also driven by Selsyns. A Selsyn transmitter 97 is coupled to the driving shaft 198 of the machine. Cutting off and delivery of shells.-The belts 130 deposit the tubes on a platform 132, Fig. 8, where they are aligned, and forwarded by reciprocating lugs 141 to cutting and delivery rolls 147, 148. The rolls 147, 148 each comprise alternate cutting and gripping discs 151, 153, the gripping discs carrying gripping tongues of known kind, and the tongues of the rolls 148 delivering the shells to the front of the machine and those of the rolls 147 delivering shells to the rear. The shells accumulate against receding supports and are hand collected. Two sets of cutting and delivery rolls giving four collecting positions may be arranged. Rollers, creasing rollers, and belts are arranged to be adjusted as necessary for varying dimensions of shells. Specification 650,930 is referred to.