GB959588A - Carton blank feeder - Google Patents

Abstract

959,588. Feeding sheets. M. B. RASMUSSON. Jan. 10, 1961 [Feb. 1, 1960], No. 963/61. Heading B6B. Carton blanks 14 are separated sequentially from the top of a stack 13 and pulled upwardly along guides 22 to the nip of a pair of rotating feed rollers 31, 32 by needles 62 on a carriage 51 which is reciprocated by a piston rod 48 secured to a piston in a cylinder 47 supplied with compressed air or other fluid. The cylinder 47 is pivoted to brackets 43, and can be swung into the inoperative position 49. The needles 62 are secured by screws 63 in a rectangular block 61 having stub axles freely mounted in the carriage 51 and secured to end wheels 57, 58: limited rotation of the wheels and block is allowed by stops 64, 66 on the carriage. The stack 13 is contained on a support 12 by a rear stop 26, side guides 18, and triangular front guides 22 which provide inclined faces 23 along which the blanks are guided to the rollers 31, 32. In operation, on the commencement of a feeding stroke, the wheels 57, 58 rotate by frictional engagement with the top blank 14 against the stop 64 and the needles pierce the blank: thereafter the blank is pulled along the stack until the front end is gripped by the feed rollers 31, 32. The rollers pull the blank at a fast rate, thus rocking the block 61 against the stop 66, so that the needles release the blank. On the return stroke of the carriage 51, the wheels 57, 58 slide along the top blank to starting position. The feed roller 32 is driven by chain and sprocket means from a motor, and the roller 31 is spring-urged downwardly. The blanks are fed by the rollers to a folding station 7.