GB727119A - Cutting and creasing press - Google Patents

Abstract

727,119. Cutting-machines. S & S CORRUGATED PAPER MACHINERY CO., Inc. July 13, 1953 [July 29, 1952], No. 19406/53. Class 31 (1). [Also in Groups II and XVI] A press for cutting and creasing cardboard and other blanks, e.g. for producing box-blanks, comprises a die 31 supported on a bed 30, a curved member 35 arranged to roll on the die, and means for feeding a blank to one end'of the die and withdrawing it from the opposite end, both the feed and withdrawal occurring when the curved member is at the other end of the die. The member 35 is shown as a quadrant rotatably carried by a shaft 36 in blocks 37 riding in guide slots 38 in supports 39 disposed above the die which has upstanding cutting and creasing blades. The blocks are reciprocated to cause the quadrant to roll by means of crank mechanism 41, 43 driven from a motor 11 through chain-and-sprocket gearing 16 ... 19, slip between the quadrant and die being prevented by gear teeth 50 on the rack engaging fixed racks. The chain-andsprocket gearing also drives crank mechanism 83, 84 for feeding a blank to the die when the quadrant is retracted, and crank mechanism 143, 145 for withdrawing a finished blank when the quadrant is advanced. The blanks to be operated upon are fed from a hopper 60 having front, rear and side gauges 61, 62, 63, of which the gauges 62, 63 are adjustable to the size of the blanks being cut. The lowermost blank in the hopper is fed by a slat 70 carried by posts 72 on blocks 81 slidable on rods 82 by the crank mechanism 83, 84. The slat 70 is connected to the posts 72 by bolts 76, being urged upwardly by springs 78; the slat may be of resilient material and chamfered at its rear edge. The finished blank is withdrawn from the die by being gripped by two pairs of spring fingers 102, 103, each pair of which is carried on a block 104 mounted on a slide block 140 reciprocated along a rail by the crank mechanism 143, 144. Each finger 103 is hinged to the finger 102 and its movement to and from gripping engagement is controlled by an arm 110 having a roller 111 co-operating with cam tracks 115, 116; a spring 107 urges the finger 103 to. open position. As the blocks move inwardly during a pressing stroke of the quadrant, the fingers 103 are held open as-long as the rollers 111 run on the track 116; at the end of this movement, the fingers' 103 coact with the fingers 102 to grip a finished blank by the passage of the rollers 111 up an incline 117 and past a spring-pressed door 120 on to the upper track 115. The blank is then withdrawn by the retracting movement of the blocks 104, at the end of which the rollers 111 drop off the track 115 so that the fingers release the blank which drops on to a transverse endless conveyer 130. In a modification, the quadrant co-operates with the underface of the die which is then fixed beneath the bed 30.