Patent GB-190517480-A (GB)
Title: Improvements in Machines for Closing and Sealing the Bottom Flaps of Paper Cartons or Boxes.
Inventor: BIRD CHARLES SUMNER
Filed: 1905-08-29
Granted: 1906-08-16
Abstract: 17,480. Lake, H. H., [Bird, C. S.]. Aug. 29. Box-making machines.-The bottom end flaps of paper cartons or boxes are closed and sealed in the machine illustrated in the Figures. The carton is placed on one of the radial carriers fixed to the member 52, Fig. 2, mounted on the sleeve 51 of the shaft 50; the sleeve also carries a disk 54 with a series of notches in its periphery. Each carrier has a base 63 supporting a pedestal to which a block 66 is fixed, the block having sockets 67, Fig. 7, receiving the upper ends of pairs of pivoted arms 68, carrying rollers 70, which project slightly beyond the edges of the block 66, the arms being capable of adjustment as shown. Plates 73, 74, Fig. 2, with upturned lips 75 are also fixed to two edges of the block 66. The disk 54 and the carrier member 52 are intermittently rotated by the projection 49 on the cam 48, Fig. 1, engaging between radial walls 56, 57, Fig. 5, on the disk 54, which is held in its positions of rest by the pin 61 dropping into one of the peripheral notches, from which it is afterwards disengaged by the action of the cam 48 on the roll 58. As the carton is carried forward, the end flaps a, b are respectively folded by the end 34, Figs. 1 and 2, of the plate 33, and the tucker 37 mounted on the shaft 39 connected by the arm 41 with the rocking-cam 42, and the side flaps are spread outwards by the wings 35 till they are at right-angles to the carton body. In the next forward movement, the side flaps are glued on their inner surfaces by the rolls 30, and the carton comes to rest opposite the side-flap folders. Meanwhile the end flaps have been held in position by the guides 36 and the side flaps have been turned downwards by the guides 43, 44, the flap c, Fig. 6, having been bent slightly inwards, and this position is maintained by the bar 113 when the guide 43 has been passed. The carton then remains at rest while the arm 100, Fig. 1, is moved inwards by the pivoted lever 106, actuated by the cam 96 on the cam shaft 94, thus causing the roller 103 on its end to roll the flap c inwards into contact with the end flaps a, b. The cam 97 on the cam shaft acts on the lever arm 111, Fig. 6, causing the bar 113 to be swung clear of the path of the remaining folder 129, Fig. 3. The folder support is pivoted between the arms of a pivoted frame 126, and its upper end is also pivoted to the block 116, Fig. 4<a>, free to move towards and from the set-screw 117. When the folder roll 103 begins its backward movement, the cam 98, Fig. 1, acts on the crank 119 to rock the shaft 118. The lever 120 is swung to the left, moving the stud 121, extending through the slot in the link 122, and thus compressing the spring 124, fixed to the studs 121, 125. The compressed spring causes the frame 126 to move, and the folder plate 129 is carried inward with a rocking movement to fold down the fourth flap with a sharp blow, which compresses all the flaps. The plate 129 may have more or less dwell against the flaps, or may fall back slightly after delivering its blow. During the next movement of the carrier, the closed end of the carton moves over the guides 132, Fig. 2, and the pressure rolls 133, journaled in yielding bearings, the first roll 135 having been moved outwards by means of the cam 140 to permit its passage. The carton is finally carried between the rollers 149, Figs. 1 and 3, when the rollers and their shafts are at the outer limit of their movement. The rollers 149 are constantly driven by means of the chain 81, and the cam 47 on the shaft 15 moves the rod 144. to rock the shaft 142 and to swing the cams 145 away from the rolls 146, permitting the inward motion of the carriage 148 carrying the rollers under the action of their springs. The catton is thus nipped between the rollers 149, 70 and is moved lengthways off the carrier.