GB165949A - An improved machine for producing blanks of card board or like material to be used in the manufacture of boxes and the like - Google Patents

Abstract

165,949. Swift, G. W. April 7, 1920. Creasing, scoring, and the like. - Relates to machines for creating and slitting cardboard or like blanks in the manner shown in Fig. 39 for making boxes &c. The sheets may be fed to the machine by the mechanism described in Specification 166,091, [Class 100 (i), Feeding and delivering webs &c.], and are delivered to feedrolls 15, Fig. 2, the forward edge of each sheet being raised by arms 95 mounted on a shaft 96 which is rocked by a crank on one of the machine shafts. The crank comprises an arm 101, Fig. 25, provided with a crank-pin opening 100 and fixed to a ring 102, which is adapted to fit on to the end of a shaft and be secured thereto by means of an integral spring tongue 105 and a screw 106. The sheets pass from the roll 15 to two pairs of creasing-members 31, 32 and 34, 35, which form the longitudinal creases 190, Fig. 39, in the blank, and are mounted with capacity for relative adjustment upon shafts 25, 25'. The shafts are connected by two sets of gear-wheels 27, 28 and 37, 38, Fig. 6, the inner set being adjustable upon the shafts. The creasing-members 31, 32 are secured to collars 29, 33 on the shafts, and the creasing-members 34, 35 are secured to the gears 37, 38 so that they can be adjusted relatively to the members 31, 32. Gearlocking members are provided to hold the inner gears when released from the shafts. The sheets next pass between shafts 40, 40<1> provided with feed-rolls and with rotary knives for cutting the blank to the desired length. The sheets then pass between shafts 50, 50<1> carrying two sets of slitting-dies 60, 61 and 62, 63, Fig. 4, which form the slits 170, Fig. 39, in the edges of the blank. The two sets of slitting-dies are relatively adjustable by means of two sets of intermeshing gears, as in the case of the creasing- members. The blanks are then removed by rolls 67 and delivered to a platform &c. Feed-roll segments 114, Fig. 2, are arranged adjacent to the creasing-members on the shafts 25, 25<1>. These segments comprise a plate 110, Fig. 20, having a dovetailed recess to receive a spring-pressed member 113 having a curved outer surface 114. A modified form of segment is constructed in one piece. In the case of narrow sheets, positive feed of the material through the machine is ensured by pairs of segmental feed-members mounted on the shafts, 25, 25<1>, 50, 50<1>, one member of each pair having a spring-pressed portion. The slitting-dies each comprise a segmental member 158, Fig. 9, having a shouldered recess to receive an adjustable die-supporting member 150 carrying a die-plate 153, which may have parallel cutting-edges or converging edges for cutting wedge-shaped slits as shown in Fig. 38. Co-operating with the dies are punches 145, Fig. 11, adjustably mounted in members 40. Portions are cut out of the blank to form a tongue 171, Fig. 39, by L-shaped cutters 64, 65, Fig. 18, which are mounted on the shafts 50, 50<1>. The circumferential cutting-edges 175, 183 of the cutters are arranged to give a shearing cut, and the angular part 177 of one cutter bears upon a flat surface 185 on the other. The creases 172 in the blank are preferably rolled in by ribbed rolls on the shafts of the rolls 15.