Patent GB-1273215-A (GB)
Title: Packaging machines
IPC: B65B49/00
Filed: 1969-05-28
Abstract: 1,273,215. Packaging machines. BELTX CORP. 28 May, 1969 [3 June, 1968], No. 27051/69. Heading B8C. A machine for forming packages from flat blanks 2 comprises a forming press 6 having a plunger 68 for forming each of a succession of blanks fed into the machine into an open-sided box 3 having at its mouth an outspread flange, or outspread flanges 13 surrounding the mouth of the box, jigs 40 for holding open-sided boxes formed in said forming press, means causing each blank formed in said press to be transferred by said plunger 68 to a said jig ready for receiving an article, or, articles, and box closing means for securing a cover to the outspread flange or flanges to close the box. Individual jigs 40, are adapted to be pushed along front and back flat table guideways 42, 41 respectively by pushers 49, 47 the jigs along the back guideway 41 being moved successively against a stop 51 at a card forming and feeding station 52 where it is loaded with a blank formed to box shape as shown in Fig. 4 before being transferred along the stop 51 to the front guideway 42 by a pusher 60. As the loaded jigs 40 are moved along the front guideway 42 an article to be packaged is placed in the box portion 3 of the blank and the jig passes under a continuous web of transparent film 70. A cover 72, electrically insulated from the body portion 73 of the jig is swung down on to the latter as it trips a switch 158 and the cover 72 of the blank and the film 70 is sealed to flanges 13, 21, and 29 of the box portion 3 of the blank by high frequency electrical energy which is applied to the jig cover 72 and body 73 portions acting as electrodes. A stack of blanks 2 is mounted on a levelling support plate 100, Fig. 6, carried by slides 86 which are urged upwardly in the frame 80 of a tiltably mounted hopper 62 by a weight 90 and chain 88 which passes over a sprocket 89 on a shaft 91 which extends between the slides 81 and has a ratchet wheel 92 engaged by a pawl 93. The latter is mounted on a bar 94 which is urged upwardly by a spring 97 to normally engage the ratchet wheel 92. The blanks 2 are removed, one at a time, from the stack and deposited in the form 66 by a pair of suction blocks 110 which are mounted on a plate 116 having horizontal as well as vertical movement towards and away from the stack. As the blocks 110 are lowered over the stack 2 the plate 116 6 depresses the bar 94 to move the pawl 93 out of engagement with the ratchet 92 so that continued downward movement of the blocks 110 as they engage the stack 2 causes the latter to move downwardly against the action of the counterweight 90. Control switches cause the blocks 110 to be raised, moved horizontally over the form 66, lowered to deposit a blank on the latter, operate a lever, and release the suction on the blocks 110. The plate 116 is then raised and moved horizontally to its initial position. The blank forming mechanism includes a plunger 68 which is carried by the plate 116 and which is aligned over a cavity 150 of the form 66 when the blocks 110 are aligned over the stack 2 and performs corresponding vertical and lateral movements to form the blank into the shape shown in Fig. 4 and lift it, by suction, and transfer it to the body portion 73 of the jig positioned against the stop 51, the plunger 68, as it is raised, being supplied with compressed air and the suction ports being directed to atmosphere to ensure that the blank is retained in the jig cavity.