Patent GB-150392-A (GB)
Title: Improvements in and relating to wrapping machines
IPC: B65B11/32
Filed: 1919-05-26
Abstract: 150,392. Price, A. M. May 26, 1919. Packeting by wrapping-up.- In a machine of the type described in Specification 15822/15 for wrapping up sticks of chewing-gum and like articles in an inner wrapper and an outer wrapper or label, the sides of the inner wrapper are creased and folded on to the bottom of the stick, and a label is wrapped around each stick. (1). The sticks g are stacked in a magazine 4, Fig. 4, and a swinging arm 21 is provided for pushing the bottom stick and a length of wrapping-paper p into one or other of four pockets 27 in an intermittingly rotating drum 20. The drum is provided with a number of pivoted clamps 30, Fig. 6, which are urged by springs 32 and are provided with rollers 31 projecting into the pockets 27. The partly-wrapped stick is transferred from a pocket and pushed along a table 33 by means of an oscillating transporter consisting of two plates 78, 79 formed with fingers 80, 81, 82. The plates 78, 79 are secured to cross-bars 77 connecting plates 76 which are mounted on pins 85, 86 extending from cranks 87, 88 on shafts 89, 90. The plates 78, 79 are in register with slots 34, 35, Fig. 9, in the table and grooves in the drum. The table is formed with a concave part 36 to receive the drum and is provided at the sides with folding-plates 38. 39, Fig. 9, which are arranged above clearance spaces 46, 47 and are formed with fingers 42, 43 and bevelled parts 44, 45. The table is provided also with a spaced cover-block 48 which is formed with grooves 49, 50 for the passage of the transporter and is faced with plates 51, 52, 53, flanges 54, 55 being formed on the plates 52, 53. The plate 51 is provided with pivoted clamping-plates 72, urged by springs 74. To permit of ready detachment of the cover block, it is formed at the back with a plug for engaging a socket and is formed at the front with a notch 60, Fig. 9, for engaging a bracket 61. A bolt 63, urged bv a spring-actuated lever 65, engages a hole in the bracket. In operation, the wrapper is folded around three sides of the stick during the insertion of the stick and wrapper in one of the pockets 27. The drum then rotates .in stages through two right-angles and the partly-wrapped stick is engaged by the fingers 80 of the transporter and is moved into the space between the cover block and the table the projecting part of the wrapper being thereby folded on to the bottom of the stick. The projecting sides of the wrapper are, during the movement of the stick, engaged by creasing- blades 92, Fig. 6, which are secured to the plates 76 and co-operate with the flanges 54, 55 to crease and turn downwards the projecting sides. The transporter then recedes, leaving the stick in engagement with the first clamping-plate 72. At the next forward movement of the transporter, the stick is engaged by the fingers 81 and the depending sides of the wrapper are folded on to the bottom of the stick by the action of the folding-plates 38, 39. The transporter again recedes. leaving the stick in engagement with the second clamping-plate 72, and at the next forward movement of the transporter, the fingers 82 move the stick into the one or other of four pockets 102 in an intermittingly rotating drum 100 forming part of mechanism for applying the labels or outer wrappers. (2) The labels L, Fig. 4, are stacked in a magazine 114 and rest on delivery rollers 126 which are caused to rotate intermittingly by the following mechanism. The feed-rollers are secured to a sleeve 125, Fig. 10, loose on a spindle 124 which is mounted in a hollcw driving-shaft 119. A spring 129, arranged between a sliding collar 128 and a washer 130 urges the sleeve towards the shaft but is normally overcome by a spring 132 which urges the spindle outwards. The spindle is controlled bv a stationary cam 135 engaging a roller 136 on a lever 137 which is pivoted on a bracket 139 on the shaft and engages a pin 140 on the spindle. During each revolution of the shaft 119, the cam 135 forces inwards the spindle and permits the spring 129 to press the sleeve 125 into driving-engagement with the shaft 119. The label is delivered by guides 145, 162 and feed-rollers 146, 147 to the drum 100. The rollers 146, 147 are spring- pressed and are mounted in adjustable frames 150, 154. The drum is formed with concave parts 165 for releasing the labels. Pockets 102 in the drum 100 are provided with clamping- levers 103, Fig. 6, which are urged towards the pockets by springs 106 and are controlled by cam-mechanism, arranged as follows. Rockshafts 107, mounted in the drum. are formed with cam parts 109 for engaging lugs 108 on the clamping-levers and are provided at the ends with cranks which ride on a stationary cam disk adapted to rock the cranks and thereby cause the parts 109 to raise the clamping-levers. When the label and the wrapped stick are pushed by the fingers 82 into one of the pockets 102, the label is wrapped around three sides of the stick. The drum is then rotated through a right-angle and the depending part of the label receives lines of glue from the following device. Gluing-disks 175, Fig. 4, dipping into a receptacle 166 are secured to a shaft 176 provided with a ratchet-wheel 178 driven by a pawl 179 which is carried by a loose arm 181 on a shaft 183. The arm 181 is provided with an extension 197 which is connected by a link 213 to an arm 214 on a rock-shaft 215. The depending part of the label is pressed into contact with the gluing-disks and is then stripped therefrom by a bar 189 and a plate 192 respectively. The bar and plate are carried by rocking arms 188 secured to the shaft 183. the extension 197 being yieldingly connected by springs 208. 209 to an arm 195 on the shaft. The bar and plate are formed with notches in register with the gluing-disks. To permit of detachment, the plate is slidably mounted in brackets 191 on the arms 188. The receptacle 166 is detachably mounted on the framework, and is secured by a pin 170 which is received by a slot 169 in the framework, a neck in the pin being passed through the narrow mouth of the slot and the pin being then moved endways. When the label has been glued, the drum is rotated through a rightangle and the stick is then pushed into a passage, arranged between a table 222 and a plate 241, by means of an oscillating transporter. The transporter consists of two plates 224 which are secured to cross bars 226, 227 connecting the plates 76 and are formed with fingers 230, 231, in register with slots in the drum and the table. The plate is provided with a spring-pressed clamping-plate 242 and is secured to a cover-block 223 which is similar to the cover-block 48. In operation, the fingers 230 push the stick up to the clamping-plate, the glued part of the label being thereby pressed into contact with the overlying part. and the fingers 231 then push the stick out of the passage. For stacking the sticks, the plates 224 are provided with extensions supporting rollers 236 which at each operation lift the stack to permit the fingers 231 to insert a stick at the bottom of the stack. The stack is engaged by pressing-arms 247 secured to a spring-urged shaft 245 mounted on the cover-block 223. The stack is ejected periodically by shifting-prongs. (3). A device is provided for stopping the machine if a stick is not fully inserted in the pockets of the drum 20 or is displaced during its movement with the drum. The device consists of a feeler 279, Fig. 4, secured to a rock-shaft 280 provided with a dog which co-operates with a ratchet-wheel on the driving-shaft 13. If a stick projects from the drum the feeler is engaged and rocked by the stick and the dog is caused to engage the ratchet-wheel and stop the machine.