Patent GB-190408230-A (GB)
Title: Improvements in Machines for Covering Boxes
Inventor: SMITH PHILIP STANLEY
Filed: 1904-04-09
Granted: 1904-12-15
Abstract: 8230. Lake, H. H., [Smith, P. S.]. April 9. Making pape r, cardboard, and like boxes.- Relates chiefly to machines of the type described in Specification No. 19,967, A.D. 1901, for covering boxes, and to a modified form for use with boxes, the corners of which have not previously been jointed. In these machines, the cover used consists of a single piece of material comprising a central portion with side and end flaps. The blank is coated on one side with glue, and the box placed upon it by hand. The box with the adhering blank is then placed upon a two-part separable form-block carried by a reciprocating plunger, and is moved up and down between covering-devices, which fold and press the flaps against the sides and ends of the box, and turn their ends over the edges of the box into its interior. The covering-device for one side is shown in vertical section in Fig. 2 and in plan in Fig. 4, Figs. 6 and 8 representing details. A plate 1, attached to the top of the machine by means of a bolt 3 passing through a slot 4, has arms 5 projecting upwards and forming a yoke, and hangers 6 joined together at their lower end by a boss through which passes a rod 54. A roller 8, or other pressing-device, is mounted in bearings 9 carried by stems 12, which pass through bearings 13 formed in blocks 14 at the end of a rock-shaft 10. The bearings 9 are preferably of U-shape, and are left open upwards. Springs 15 normally press the roller against the sides of the dsscending box. In order to smooth the cover over the sides before pressing it, a brush 17 or similar device is mounted above the roller, preferably by means of hinges 18, and may be supported in its operative position by resting on the bearings 9. This brush is curved upwards and outwards in the middle, preferably by bowing the head of the brush upwards and making the bristles longer. After the side flaps of the cover have been fixed, their ends are smoothed over the ends of the box by a brush 22, Fig. 8, carried by a wing 20 which may be flexible. This wing is adjustably mounted on a bracket 23 by means of a set-screw 24 which engages with a stem 25 on the wing. There is a pair of brackets for each side of the box, mounted on a laterally-reciprocating bar 26. The brush 22 is cut away at 31, this part serving to maintain in position the part of the flap which projects above the edge of the box, while the lower part of the brush presses the flap against the box. The box subsequently passes covering-devices for folding the end flaps, after which it is carried down into position to have the projecting edges of the blank turned in over the edges of the box. This is accomplished by plates 46, Fig. 2. One of these plates 46 is provided for each covering-device, and is clamped between a bevelled protecting-nose 50 and a head 47, to which reciprocating motion is transmitted from the rod 54 by mean, of a link 55, bell-crank lever 52, and link 53. The lever 52 and head 47 are slotted or made in two parts to embrace the links 55, 53. While the plates 46 are being operated, a rubber-faced block 62 is pressed against the box, by cams on the sleeve of the lever 52 acting on the head 64 which carries the block. A spring 71 acting on a sleeve 79, which is screwed to a stem 67 attached to the head 64, causes the withdrawal of the head at the required time. The block is retained in the head by means of a setscrew 65 taking into a groove in the block. A rod, passing through the hollow stem G7 and sleeve 79, has at one eud a milled head 75, and its other end presses on a plate at the back of the block 62. Inside the sleeve 79 a nut is screwed on the rod, and held against rotation by a projection which engages a slot in the end of the tube 67, or by other suitable devices. A spring inside the sleeve bears against the nut and the opposite end of the sleeve, so that, by turning the milled head 75, the pressure on the head can be adjusted. The cams on the sleeve 52 are so designed that the block 62 is pressed against the box just before the plate 46 is actuated ; the pressure is then relaxed and again applied as the plate passes over the edge. When the plate is being disengaged from the box, the block moves with it, but is again pressed against the box just after the upper part of the form-block has entered the box and pressed the cover against the inside. The covering being then complete, the pressure blocks are withdrawn again. The shaft 10 is rocked by means of a link 11, the end of which is hooked over the projecting end of the pin 60 uniting the link 55 and lever 52. When covering boxes which have not previously been " stayed," it is necessary to lift the ends of the box into position before attaching the ends of the side flaps thereto. This is effected by a curved arm 33 pivoted to the bracket 23, and held in the position shown in Fig. 6 by a stop-bar 36 when the bar 26 is retracted. On the advance of the bar 26, a spring 37 turns the arm 33 on its pivot, so that it engages the end 38 of the box and lifts it into position for the application of the flap 41 by a brush 43, the bristles of which are in this case of uniform length. The brush is vertically adjustable in a slot in the bracket, and is fixed in position by. a screw 45. To protect the roller 8 from injury by the brushes 43, a guard-plate 16 is attached to the bearings 9, and passes underneath the roller. The brackets 23 are adjustably secured to the bar 26, and, by fitting suitable brackets, the machine can be used either for stayed or for non-stayed boxes.