US2831303A - Machines adapted for applying wrappers - Google Patents

Machines adapted for applying wrappers Download PDF

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Publication number
US2831303A
US2831303A US475695A US47569554A US2831303A US 2831303 A US2831303 A US 2831303A US 475695 A US475695 A US 475695A US 47569554 A US47569554 A US 47569554A US 2831303 A US2831303 A US 2831303A
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article
cam
arm
attached
lever
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US475695A
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Hollis Albert Charles
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B U Supplies & Machinery Co Ltd
B U Supplies & Machinery Compa
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B U Supplies & Machinery Compa
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B23/00—Packaging fragile or shock-sensitive articles other than bottles; Unpacking eggs
    • B65B23/10—Packaging biscuits
    • B65B23/18—Wrapping individual biscuits, or groups of biscuits

Definitions

  • One of the various objects of the present invention is to provide an improved machine adapted for applying a wrapper to a small quantity of loose biscuits and in the operation of which due regard is paid to the customary characteristics of biscuits as indicated above.
  • Another of the various objects of the present invention is to provide an improved machine which will apply a Wrapper tightly to an article of the shape of a rectangular prisllelepiped regardless, within limits, of the precise dimensions of the article.
  • This illustrative machine comprises a central horizontal table on to which a wrapper of transparent foil is fed in the operation of the machine, and two groups of mechanism respectively at opposite sides of the table.
  • Each group of mechanism comprises a carrier member mounted for turning movement about an axis, an arm pivoted to the carrier member, and a supporting bar mounted on the arm.
  • Resilient means in the form of a spring interconnects the carrier member and the arm and tends to turn the arm about its pivot relative to the carrier member and so increase the distance of the supporting bar from said axis. Increase in such distance is checked by a band of flexible, comparatively inextensible, sheet material which is connected to the supporting bar and passes over one edge of the table, the axis about which the respective carrier member turns being adjacent this edge of the table.
  • the supporting bars movetowards one another over the top of the article, the bands flexing further and again yielding against the action of the springs inaccordance with the precise shape of the article, and the bars then move downwards on top of the article one after another to press opposite end portions of the wrapper downwards against the top of the article in overlapping relation;
  • the bars move in paths determined at least in part by the shape of the article to be wrapped and the bands flex at localities also determined by said shape; the article is subjected to the pressure of the bands which is yielding only and crushing of the work guarded against.
  • the bars are then swung downwards to bring the hands into horizontal positions, allowing the wrapped article to be pushed off the table into end folding mechanism.
  • Figure 1 is a side view of the illustrative machine with certain parts broken away to reveal the mechanism
  • Figure 2 is a plan view of 'the illustrative machine
  • Figure 3 is a view, partly in section of a feed plate and transfer mechanism as incorporated in the illustrative machine
  • Figure 3A is a view in section along the line IIlA-IIIA in Figure 3, showing a detail of the transfer mechanism
  • Figure 4 is a plan view of certain parts shown in Figure 3;
  • Figure 5 is a plan view, partly in section, along the line VV in Figure 3; v A
  • Figure 6 is a view, partly in section, of certain of the parts shown in Figure l; I
  • Figure 7 is a front view of folding devices fitted in the illustrative machine.
  • Figure 8 is a view of a heat sealing device
  • Figures 9, 10, 11 and 12 are side views of different stages of operation of web folding devices as incorporated in the illustrative machine;
  • Figures 13 and 14 are side views of a cam mechanism
  • Figure 15 is a front view of a pusher arm and cam mechanism corresponding to Figure 14;
  • Figure 16 is a side view of an end folding mechanism
  • Figures 17 and 18 are plan views of end folding devices in two stages of operation
  • Figure 19 is a timing diagram ot'the various mechanisms incorporated in the illustrative machine.
  • Figures 20, 21 are side views of an alternative end folding device in two stages of its operation.
  • the illustrative machine comprises a main framework 2 (Fi r hi pp p in pa t of th ma.- chine and drives therefor.
  • the machine has a main driving shaft 4 which is belt driven from a motor 5 ( Figure 2) and two cam shafts 6, 8 which are chain driven from the shaft 4, both in a 1:1 ratio.
  • a rotary feed mechanism 12 In the operation of the machine, articles to be wrapped are placed by hand in pockets 1% ( Figures 1 and Z) of a rotary feed mechanism 12.
  • This mechanism consists of a circular base plate 14 rigidly fixed by four pillars 16 to the top of a hollow vertical shaft 18, which is attached to the framework 2 by a horizontal arm 20.
  • the shaft 18 has supported inside it a vertical feed table driving shaft 2.4 which is prevented from moving downwards by a collar which rests on a bearing positioned towards the upper end of the shaft 18.
  • a driving pulley 26 is attached to the lower end of the shaft 24.
  • the upper part of the shaft 24 passes through a hole in the base plate 14, and has rigidly attached to it parallel to and concentric with the base plate 14 the rotary feed plate 28.
  • the pulley 26 is driven from a pulley 30 on the shaft 4 by a belt 31; a pair of tensioning pulleys one of which is shown at 52 ( Figure 2) are resiliently attached to the arm 2%, and serve to maintain the tension of the belt when it is required to drive thepulley 26, while allowing the belt to slacken when the pulley 26 is prevented from rotating, as will be described later.
  • Attached equidistantly around the outer circumference of the feed plate 23 by angle pieces 34 are the feed pockets it of which there are twelve.
  • the pockets 10 are rectangular in horizontal cross-section and are open at top and bottom.
  • a slot 36 ( Figure l) is provided in each pocket to allow for easy removal of any article if necessary.
  • the pockets i l) have outwardly flared top edges to facilitate the placing of articles therein.
  • the feed plate 28 is smaller than the base plate 14, so that articles placed in the pockets 10 rest on the surface of the base plate 14.
  • the base plate 14 has a rectangular gap 42 ( Figure 2) cut in its circumference.
  • Two jaw blades 44, 46 pivoted at 47 upon the plate 14 and geared together by gears 49 are situated under this gap, and are so arranged that they are normally kept closed by a spring 48.
  • a Bowden cable 50 is attached to the jaw blade 44,
  • the feed plate 28 is rotated step by step in an anticlockwise direction in the operation of the machine, one step for each cycle.
  • Such rotation is controlled by an arm 54 ( Figure 4) which carries a stop 53 arranged to engage each pocket It) in succession and arrest rotation.
  • the arm 54 lies adjacent to the gap 42 and is mounted on a vertical spindle 63 which passes through the base plate 14. Attached to the lower end of the spindle 63 is a lever 59, pivoted to a link 61 which is itself pivoted to a solenoid bar 57.
  • a micro switch 55 is attached to the framework 2 in such a position that at one point in the cycle, i. e. between the closing of the jaws 44, 46 and their subsequent reopening, it is contacted by a transfer arm operating cam lever 74, which, by closing the switch, activates the solenoid 56, and thus by causing the bar 57 to be drawn into the solenoid serves, through the lever 59 and link 61 to rotate the arm 54 clockwise.
  • a pocket 10 containing an article to be wrapped rotates station.
  • pillar 33 attached to the base plate 14 carries hinged to it a trip bar 35.
  • This has attached to it a microswitch 37, fitted with a trip lever 39.
  • An end part of the trip bar 35 is bent downwardly and then upwardly into roughly the shape of a V, and the bar is so shaped and situated that it rides over the feed pockets 10 as they rotate intermittently with the feed plate 28. If an empty pocket passes under the bar 35, the V-shaped portion drops into the pocket, and the trip lever 3) contacts an innermost (i. e. furthest from the feed wheel circumference) edge of the pocket and operates the microswitch 37".
  • the switch 37 is connected to an overload trip in a motor starting switch. In normal operation Where the pockets are full the V-shaped portion of 35 rides over the top of the article in the pocket and the trip lever 39 thus rides clear. The parts described thus stop the machine whenever an empty pocket passes under the trip bar 35.
  • the transfer mechanism 58 is constructed as follows ( Figures 3 and 5).
  • a hollow shaft 62 is rotatably supported on another cantilever hollow shaft 64, and is prevented from moving axially by collars 66.
  • To the shaft 62 are attached two rectangular blocks 68, 7t) and a sprocket wheel 72. Over the sprocket wheel 72 passes a chain of which one end is attached to a spring 73, itself attached at its other end to the framework 2, and the other end to the cam lever 74 which is operated upon by a cam 76 on the cam shaft 8 ( Figure 6).
  • the blocks 63, 70 have attached to them two parallel shafts 78, to the ends of which is fixed a U-shaped box member 80, the member 86 having two bosses 81 one fixed to each of the shafts 78.
  • Rotatably mounted on each shaft 78 is a swivel tube 82, which is restrained from axial movement by one of the bosses 81 at one end of the tube 82 (henceforth called the upper end) and by one of the blocks 68, 70 at the other, lower, end.
  • each tube 82 has attached to it an L-shaped member 84, such that a base part 85 of the L lies perpendicular to the swivel tube, and an arm 86 is an upward extension parallel to the tube.
  • a supporting framework is thus joined by the two members 84 and the member the two arms 86 together form one side of the framework, the member 84) the other three sides and the parts of members 84 the base of the framework.
  • the member 80 has a somewhat flared top edge to allow for the easy entry of articles to be wrapped.
  • a lever 37 Perpendicularly to the lower end of one of the tubes 82 is attached a lever 37 which is linked by a crosspiece 90 to a similar but slightly longer lever 38 attached to the lower end of the other swivel tube. This linkage is so arranged that the two tubes 82 rotate together in opposite directions, and by doing so may cause the arms 86 to move outwardly away from each other thus opening one side of the framework.
  • a plate 91 attached to the block 68 has attached to it the sheath of a Bowden cable 92, the wire of which passes through a coil spring 94 and is attached to the end of the lever 88.
  • the cable 92 passes loosely through the shaft 64 and at its other end is attached to a cam lever 96 ( Figure I) acted on by a cam 98 on the shaft 8 and it will be understood that as the cam 98 is rotated so the arms 86 are caused to move outwardly away from each other.
  • the operation of the transfer mechanism 58 is as follows.
  • the article is deposited as described above in the framework while the shafts 78 are in a vertical position.
  • the cam 76 then operates on the lever 74 and through the chain causes the shaft 62 to rotate until the shafts 78 and tubes 82 have been brought into a horizontal position: the framework is then immediately above the centre seam forming station and the article is resting on the arms 86, 86.
  • the cam 98 operating on the cam lever 96 and hence on the levers 87, 88, through the Bowden cable 92, causes the tubes 82 to rotate, and thus the arms 86 to move away from each other and deposit the article on a table 324 described hereinafter.
  • the cam 76 then allows the spring 73 to reassert itself and thus the transfer mechanism 58 is brought back into a vertical position until it rests against a rubber locating stop 102 ( Figure 3) attached to the underside of the base plate 14 on the inner edge of the gap 42; the arms 86 are allowed to close as the mechanism moves into a vertical position.
  • the cam 76 is an eccentrically mounted circular disc which acts positively on the lever 74 to cause the downward movement of the transfer mechanism 58. On the upward movement the lever follows the cam until the transfer mechanism 58 is against the stop 102. To prevent excessive strain on the mechanism from the spring 73 trying to rotate it still further the cam lever 74 is at this point brought up against a stationary stop 77 and the cam rides free of the lever until the latter is re-engaged during the next cycle when the transfer mechanism 58 is about to be brought again into the horizontal position.
  • Web 105 is supplied from a roll 104 ( Figure 1) which is mounted on a freely rotatable shaft 106 by means of two toothed conical locating and securing members 108, which are adjustably fixed to the shaft by large knurled headed set screws 109.
  • the shaft is supported at its ends by ball bearings 110 which rest in grooves 111 in arms 112 which are extensions of the framework 2.
  • a wide flanged pulley wheel 114 over which passes a canvas band 116 supporting a weight 118.
  • the web runs under a jockey roll 120, which is freely rotatable and is supported by arms 122 freely hinged to the framework 2 at 124.
  • the web then passes over another freely rotatable roll 126, which is supported between the two arms 112.
  • These rolls 120, 126 have broad flanges 130 (Figure 2) on them to control the edge of the web 105.
  • the web passes between a rubber covered stop 132 ( Figure 6) and a stop plate 134.
  • the stop 132 is attached to an upwardly extending arm 136 which is freely hinged about a horizontal spindle 138 which is fixed to the framework 2, and it rests on the web under its own weight.
  • the plate 134 prevents the stop arm 136 from hanging vertically and the two together act as a one way feed control.
  • the web 105 can feed forward freely, the stop 132 riding up under the frictional force between it and the web: if the web has a tendency to move in a rearward direction the frictional force between it and the stop 132 pulls the latter downwards onto the plate 134, the web being gripped tightly, and any further movement being prevented.
  • From the one way feed control the web passes between upper and lower feed rolls 140, 142. These are similar in size and construction and are covered with a rubbery material 141, and both have gear wheels 144 the framework 2.
  • the shaft 148 extends clear of the framework 2 at one side of the machine,.and has a sprocket'wheel 150 attached to this extension; this wheel is driven by a chain drive off a large sprocket wheel 152 on the shaft 4.
  • the roll 140 is supported in bearings in two short levers 154 ( Figure 6) which are hinged at 156 on the arms 112 and held rigidly together by a tie rod 158.
  • a spring 159 ( Figure 2) attached to'one end of this tie rod and also to the framework 2 urges the roll 140 towards the roll 142.
  • a cam 160 ( Figure 6) attached to the shaft 8 actuates a cam lever 162. Attached to one end of this lever and constrained to move in an approximately vertical direction is a rod 164 which abuts onto a flat near one end of the tie rod 158.
  • the cam 160 has a slot 161 cut in it, in which is screwed a replaceable cam piece 163.
  • Theoperating surface of the cam is made up of two arcs of constant but different radius: the arc of lesser radius extends from the leading edge 155 of the slot to a step 165,'the arc of greater radius from the step to the trailing edge 157 of the slot.
  • a bar 172 ( Figure 6) of rectangular cross section is rigidly supported across the framework 2 of the machine forward of the feed rolls 140, 142. Attached to the bar 172 are two horizontal parallel plates 166, 168 which extend across the greater part of the width of the machine, the plate 168 being vertically above the plate 166, and separated from it by a narrow gap which is maintained uniform by spacing pieces (not shown). Rearward edges of the plates 166, 168 are level with each other, and are tapered to allow them to be introduced between the feed rolls 140, 142 without touching the rolls but approaching closely to the point of contact of the rolls and the web.
  • both plates may be made capable of slight horizontal adjustment.
  • the lower plate 166 is a little longer than the upper one 168, and thus extends slightly further forward (i. e. to the left in Figure 6) providing a forward extension which serves as a stationary blade 170 for web cutting mechanism.
  • the bar 172 has attached to it at each end next to the framework 2 two vertical brass plates 174, which project above and below it and form guideways for a knife carriage.
  • the carriage consists of a rectangular framework comprising a horizontal cross bar 178, to which a knife is attached, and whose ends run between the guide plates 174, four vertical parallel bars 182 which are attached to the cross bar 178, two near each end, and which have each a vertical surface in sliding contact with one of the guide plates 174, and which pass on either side of the bar 172, and a lower cross bar 134, which is attached to the four vertical bars the guide plates 174.
  • the various rubbing surfaces be-' tween the members of the knife carriage on the one hand and the supporting bar 172 and guide plates 174' on the other are so arranged that relative movement in the vertical direction, within the limits of the construction, is free.
  • a rod 186, attached to the bar 184 by a block 185 is attached at its other end to a cam lever 138 actu- 3 ated by a cam 190 on the cam shaft 8.
  • Two springs 192 urge the bar 184 toward the bar 172.
  • the cam 1963 is thus capable of causing the knife 180 to descend and cut the web, and the springs 192 will urge it upwards out of the way the cutting action being completed.
  • the knife 139 is set at a slight angle to the cutting edge of the blade 170, thus giving a scissor-like action to the cut.
  • the web feeding action is thus, in outline, as follows.
  • the web 105 passes between the rolls 148 142, between the plates 166, 168 and finishes level with the lower blade 170.
  • the two feed rolls 149, 142 are allowed by the cam 166 to approach one another.
  • the requisite amount of web is fed forward between the knife blades onto the centre seam forming station and the feed rolls are then separated.
  • the cam 190 then urges the knife 1811 downward, the web is severed, and rests as required on the centre seam forming station.
  • the machine comprises centre seaming mechanism which is supported by two transverse bars 318, 318 ( Figure 2) across which are fixed longitudinally two end blocks 326), 320.
  • Two web folding devices F, F ( Figures 9-12) form the seaming mechanism and are disposed respectively at front and back of a fixed transverse horizontal table 324 ( Figure 6) fastened across the blocks 320, 320; the action of the front device F which acts to fold the leading portion of the wrapper 101 round an article 1 will now be described ( Figures 9, 10, 11 and 12); the action and components of the other device F are similar and corresponding parts are indicated in the figures by primed numerals.
  • each of the shape of a rectangular parallelepiped, of size 1 by 1 /2" by 331 these being of such a size as to fit loosely in one of the pockets 10 and in the member 80.
  • An axle 326 ( Figures 9, 10, 11 and 12) rotatably mounted in the two blocks 320 has a cantilever end on which is supported a sprocket wheel 328 ( Figures 2 and 7) and an arm 330 ( Figures 9-12).
  • a chain 329 ( Figure 1) passes over the sprocket wheel 328 and has one end i attached to a cam lever 332, which is: urged by a spring 335 against a cam 334 on the shaft 6. The other end of the chain is attached to a coil spring 336 fastened to the main framework 2.
  • a lever 338 is pivotally mounted on the arm 330 and is urged toward straight line relationship with it by a spring 346.
  • the lever 338 has fixed thereto a horizontally extending transverse rod 342 which in turn supports another rod 344, parallel to it, by means of two small rotatable arms 346.
  • a stop 348 is adjustably mounted on the rod 342 and is arranged to restrict the movement of the left hand one of the arms 346.
  • An endless flexible and inextensible canvas band 354 passes round the rod 344, over a bar 356 which is fixed between the blocks 320, and round a bar 352 which is situated below the table.
  • This bar is capable of vertical movement on unthreaded extensions of two vertical screws 35%, 350 ( Figure 6) which pass through the bars 32d, and is prevented from moving upwards by shoulders on the screws, and held against downward movement by tension in the band 354, such tension being maintained by the spring 346.
  • the bar 356 acts as a pivot about which the band turns during the operation of the machine.
  • a cut wrapper 101 and an article l are placed centrally on the table 324 by the previously described mechanisms 8 and processes with the large face of the article 1 in contact with the wrapper 101.
  • the band 354 lies horizontally at front and rear of the table, as shown in Figure 9.
  • the shaft 326 is then caused to rotate by the cam 334 acting through the cam lever 332, chain 329 and sprocket wheel 328 as described above, which, causing rotation of the arm 330 brings the band 354 andv hence the wrapper 131 lying on it against the vertical front face of the artcle, the position being as shown in Figure 10.
  • Further rotation of the shaft 326 causes relative angular motion of the members 338, 330 against the spring 348, and part of the band'is brought by the rod 344 over the top of the article folding the cut wrapper down as shown in Figures 11 and 12.
  • the web folding device P which operates on the trailing portion of the cut wrapper 101 is arranged to operate in a similar fashion, with the exception that the folding at the rear of the article is completed before that at the front ( Figure 11).
  • the cam 334 has a dwell on it which keeps the folding device F in the position shown in Figure 11 while the cam 334' causes the device F to operate in one continuous movement. This ensures that the leading edge of the wrapper 101 is folded over the trailing edge thereof.
  • the spring 335 is stronger than the spring 336 so that as the cam 334 rotates and lifts the lever 332 the spring 336 operates to move the shaft 326 anticlockwise (viewing Figure 9) whereas when the cam 334 allows the lever 332 to be lowered the shaft 326 is turned clockwise by the spring 335.
  • the spring. 335 is effectively stronger than the spring 340 so that a position (like that of Figure 12) is reached, with the rod 344 holding the band 354 down on top of the wrapper 161 on top of the article, regardless, within a small range, of the height of the article, the left hand one of the arms 346 becoming disengaged from the stop 348.
  • the band 354 flexes at two localities, viz. localities adjacent to the bottom front edge of the article and adjacent to the top front edge, the precise position of the second locality varying with the actual height ofthe article.
  • a centre seam sealer 360 (Figure 12) ( Figures 7 and 8) descends between them, and, resting on top of the wrapper encircling the article seals. it.
  • the sealer 360 is mounted on a horizontal transverse shaft 362 ( Figure 7), which is supported on an arm 364 (Fig ure 8) fixed to a sleeve 366 rotatable about a shaft 368 which is fixed to the main framework 2 of the machine.
  • the sleeve 366 has attached to it a block 370.
  • a cam 372 ( Figure l) on the shaft 6 has a cam lever 374 urged against it by a spring (not shown).
  • Pivotally attached to the lever 374 is a substantially vertical link 376 ( Figure 8) whose other end is pivotally attached to a substantially horizontal arm 378.
  • the arm 378 is able to retate about the shaft 368 and has attached to it and projecting transversely from it a pin 380 against which the block 370 rests under the weight of the arm 364 and sealer 360.
  • a spring 382 ensures that the block 370 and pin 380 normally remain in engagement.
  • the sealer 360 itself comprises a plate 384 between which and a cover plate 386 8 are secured sealing members 388 of L-shaped cross section and which are capable of limited vertical movement between the plates 384, 3815.
  • a hinged cross piece 390 ( Figure 7) rests loosely across these two sealing members 388 so that their vertical movements are not independent. Thus small irre ularities in the contour of the article to be sealed can be allowed for.
  • a thermostatically controlled heating element 392 attached to the plate 384 heats the sealing members 388 by conduction.
  • Attached to the framework 2 of the machine by blocks 194 are two parallel horizontal slide rods 1%, one vertically above the other.
  • An H-shaped slide block 198 is hushed onto these and thus can slide in a horizontal direction backwards and forwards.
  • a downwards extending operating lever 202 is hinged near its upper end to the cross bar of the slide block 198 through a spindle 294 and a block 206, and is hinged to the framework 2 near its lower end at 208.
  • a crank 210 on the camshaft 6 has attached to it an adjustable link 212 consisting of two parallel rods 214, passing through two blocks 216, 218, being lengthwise adjustable in these blocks and secured in them by set screws: one of these blocks, 216, is hinged to the crank 210, the other, 218, to another block 228 which is attached to the lever 282, and is capable of adjustment lengthwise along that lever, being fastened to it by a set screw. It will be seen that as the cam shaft 6 rotates, the crank 210 acting through the link 212 and the lever 282 will cause the block 198 to move backwards and forwards along the rods 196, the amount and timing of the movement being controllable within limits by adjustment of the link 212 and movement of the block 220.
  • a pusher supporting arm 222 ( Figures 2 and 13-15), which projects towards the centre of the machine, and is prevented from falling below the horizontal position by a stop 224 attached to one arm of the block 220 ( Figure 15).
  • a block 226 extends perpendicularly down- Wards from the arm 222, and has attached to it a spindle 234 ( Figures 13 and 14). 'The spindle 234 has freely pivoted thereon an arm 228 on the end of which is a chamfered cam roll 230. Also attached to the block 226 is a stop 232 which restricts pivotal movement of the arm 228 about the spindle 234.
  • the roll 230 rests on a cam way 236 which has inclined portions 237, 233 ( Figure 13) joined by a horizontal portion 239.
  • the block 188 When the block 188 is in its rearmost position the roll 230 rests on the cam way as shown in Figure 13, and as the block 198 moves forwards the roll 238 trails along the cam way 236 and the end of the arm 222 follows a horizontal path. Trailing along the portion 239 the cam lever 228 is almost horizontal, but along the portion 238 is allowed to fall back under its own weight to a vertical position.
  • the block 198 now begins to move rearwardly.
  • the roll 230 comes up against the incline 238 and is pushed backwards until the arm 228 abuts against the stop 232.
  • the roll 230 then rides up the cam way 236 and travels along the cam way as shown in Figure 14, along the portion 238 the arm 222 is being moved upwardly about its hinged joint with the block 198, along the portion 239 it is carried in an upwardly inclined position and along the portion 237 it is let down into a horizontal position again.
  • the end of the pusher arm thus describes a closed path.
  • a horizontal arm 241) at the end of the arm 222 supports a rod 242, parallel to the arm 222.
  • the rod 242 has two split blocks 244, 244 clamped to it, each of which supports a depending rod 246, 246. Pivotally mounted on these rods are pushing and rear tucking members 248, 258. Small projections at the rear of these members are joined by a light spring 252 ( Figure 18) which thus causes them normally to adopt an open position shown in Figure 17.
  • the arm 222 is in its most forward position, and the sealer 368 is in a retired position.
  • the sealer 360 descends and eventually contacts the wrapper 101 between the rods 344, 344' when the wrapping action is complete.
  • the sealer 360 and the devices F, F now remain stationary .as the arm 222 travels in a rearward direction and is lifted over the centre seaming station by the action of the roll 230.
  • the folding devices F, F open out into their horizontal position; when this is completed the arm 222 descends into a horizontal position behind the article so that the members 248, 250 are just above the now horizontal portion of the band 354'.
  • the forward movement brings the front parts of the extensions of the web into contact with forward tucking and folding members 258, 260, which as the article moves forward form forward tucks ( Figure 18).
  • the movement of the members 248, 250 carries them in between the members 258, 260 so that when the members 248, 250 retire, the members 258, 260 secure the rear tucks against springing outwards.
  • the transfer mechanism 58 placesanother article on the centre seaming station on top of a piece of severed web, and the wrapping cycle recommences.
  • the operation of the machine pushes a succession of articles one by one on to the platform 257 and between the two members 258, 260, and hence articles are pushed one by one into end folding mechanism now to be described.
  • Two cross bars 254, 256 ( Figure 2) rigidly attached to the framework 2 support the platform 257.
  • the three members 258, 262, 266 are rigidly fixed to the left hand side of the platform.
  • the member 260 is rigidly attached to a base plate 270 by a shaft 276.
  • the plate 270 has fixed to it three parallel pillars, each consisting of a screw 278 on which a sleeve 280 is secured by a nut 282 and a washer 284.
  • the sleeves abut against the base plate 270 and pass slidably through holes in a longitudinal supporting bar 286; a spring 288 on each of the sleeves urges the base plate 270 away from the bar 286, the washers 284 forming a limit stop to movement in this direction.
  • the base plate 270 and hence the member 260 attached to it is capable of limited movement against the springs 288 in a direction substantially perpendicular to the plane of the base plate.
  • the members 264, 268 are similarly mounted for movement to the right against the action of springs.
  • the supporting bar 286 has attached to it two angle pieces 290 which rest on the two cross bars 254, 256. Screws pass through holes in horizontal portions of each of these angle pieces, and through slots 292 in each of the cross bars 254, 256, and are secured by nuts on the underside; thus by the slackening of these nuts the bar 286 and all that it supports is capable of horizontal adjustment to alter the distance between the members 258, 262, 266 on the one hand and 260, 264, 268 on the other.
  • the spring mounting of these members is provided to ensure that the members are pressed up against the articles, regardless of small variations in size.
  • the members 258, 260 are outwardly flared to receive the article and also to make the forward end tuck. They are arranged so that the horizontal sideways extensions of the wrapper may pass undisturbed over and under them. Lower end flaps are then folded upward by the action of a guideway formed between the members 262 and 258 on the left hand side and 264 and 260 ( Figure 16) on the right hand side: upper end flaps are folded downwards by similar guideways formed between members 262 and 266 on the left and 264 and 268 on the right. While the lower flaps are being folded upwards the article is resiliently forced downwards by leaf springs 294, 294.
  • the folding members 266 and 268 have horizontal flanges extending inwardly and backwardly, and as the upper flaps are being folded down the article is forced upwards against these flanges by leaf springs 296, 298.
  • the spring 296 is attached to the platform 257 at 309, and the spring 298 to a small plate 301 which is attached to the bar 256, and being adjustable widthwise is normally maintained as close as possible to and parallel with member 268.
  • Rear ends of the springs 296, 298 are free and pass under the platform, so that an article can slide smoothly onto them.
  • the action of the springs 296, 298 is reinforced by two more leaf springs 392, attached to a bar 304 underneath the platform 257.
  • the springs 302 bear up through the platform 257 under the springs 296, 298. The effect of the vertical spring pressure during the end folding operations is to allow considerable variation in the height of the article while maintaining a neat and tight end fold, without requiring any adjustment.
  • End sealers 306, 308 ( Figure 2) are mounted forward of the members 266, 268 on arms 310, 312.
  • the sealers 306, 308 have their ends bent to form a flat sealing portion, the edges of which are rounded, which portions are arranged to bear on the articles as they pass.
  • the sealing portions are heated by conduction from heating elements 314.
  • the arm 312 is hinged at 316 against a spring 317, and being attached to the bar 236 is moved with that bar on adjustment for various sizes of article.
  • the arm 310 is rigidly fixed to the bar 256. When the machine is in correct adjustment the article is a little wider than the space between the two sealing plates and so sealing is carried out under pressure from the spring 317.
  • the articles are pushed one by one in a continuous line past the end folding members, having successively the lower flap folded upwards, the upper flap folded downwards and the ends sealed. Being pushed out one by one from the sealers 306, 308, the articles may be allowed to drop into a suitable container or removed on a conveyor if desired.
  • a sheet of flexible and inextensible canvas 394 is attached to a table 400 and also to a transverse supporting bar 395.
  • the bar 395 is fixed to an arm 396 which is slidably mounted in a member 398, and which is urged lengthwise in a direction so as to tension the sheet 394 by a spring 3%.
  • the member 398 is attached to a shaft 399 which can be rotated by means similar to those previously described for effecting the rotation of the shaft 326.
  • a machine for applying wrappers to articles comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, and resilient means for rotating the lever in a direction to maintain the band taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the Wrapper into close engagement with the sides and top of an article located upon the wrapper.
  • a machine for applying wrappers to articles comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, and resilient means for rotating the lever in a direction to maintain the band taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the wrapper into close engagement with the sides and top of an article located upon the wrapper, the means for moving the arms being constructed and arranged to move one of the arms in advance of the other thus to eifect an overlapping of the ends of the wrapper on the top of the article.
  • a machine for applying wrappers to articles comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, resilient means for rotating the lever in a direction to maintain the baud taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the wrapper into close engagement with the sides and top of an article located upon the wrapper, the means for moving the arms being constructed and arranged to move one of the arms in advance of the other thus to effect an overlapping of the ends of the wrapper on the top of the article, and means for sealing the overlapping ends of the wrapper.
  • a machine for applying wrappers to articles comprising a horizontal support upon which a wrapper may be positioned, a bar located beneath the support, a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the plane of the support, a lever pivoted on the arm, a flexible hand, one end of which is secured to the frame of the machine beneath the support, the band having a portion extending over the bar and outwardly from beneath the support, the other end of the band being secured to the lever, resilient means for rotating the lever relatively to the arm in a direction to maintain the band taut, and means for rotating the arm about its pivot upwardly and inwardly of the support to cause the band to bend the wrapper progressively about the side and top of an article located upon the wrapper.
  • a machine for applying wrappers to articles comprising a horizontal support upon which a wrapper may be positioned, a bar located beneath the support, an arm pivotally mounted below the plane of the support for arcuate movement heightwise of the support, a lever pivotally mounted on the arm and having an end portion normally disposed outwardly of the support, a flexible band of sheet References Cited in the file of this patent UNITED STATES PATENTS Fischer Ian. 30, 1912 I Bronander Apr. 30, 1929 Heilman Sept. 15, 1953 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 2 831 303 April 22, 1958 Albert Charles Hollis It is hereby certified.

Description

April 22, 1958 A. c. HOLLIS 2,831,303
MACHINES ADAPTED FOR APPLYING WRAPPERS Filed Dec. 16, 1954 10 Sheets-Sheet 1 B1 ven tor Albert Char/as fia/lz's By his Attorney April 1958 A. c. HOLLlS MACHINES ADAPTED FOR APPLYING WRAPPERS Filed Dec. 16. 1954 10 Sheets-Sheet 2 Ewen tor Albert (/zar/es f/ol/z's if; his Attorney A ril 22, 1958 A. c. HOLLIS MACHINES ADAPTED FOR APPLYING WRAPPERS Filed'Dec. 16. 1954 10 Sheets-Sheet 4 /2l 's Attorn A ril 22, 1958 A. c. HOLLIS MACHINES ADAPTED FOR' APPLYING 'WRAPPERS Filed Dec. 16. 1954 10 Sheets-Sheet 5 Inventor Alba/t (Vzaries [fa/[1's By his Attorney April 22, 1958 A. c. HOLLIS 2,831,303 MACHINES ADAPTED'FORAPPLYING WRAPPERS v Filed Dec. 16. 1954 10 Sheets-Sheet 6 In ven tor Albert C/zarlas H'o/lz's 55/ his Attorney A ril 22, 1958 A. c. HOLLIS 2,831,303
MACHINES ADAP'I'ED FOR APPLYING WRAPPERS Filed Dec. 16, 1954 10 Shegts-Sheet 7 Inventor Albert C/zar/es 170/1119 53/ [11's jttorney A ril 22, 1958 A. c. HOLLIS 2,331,303
MACHINES ADAPTED FOR APPLYING WRAPPERS Filed Dec. 16, 1954 1o sheets-sheet s art- :16.
In ven tor Albert Charles/7015s By his Attor/ze April 22, 1958 A. c. HOLLIS 2,831,303
MACHINES ADAPTED FOR APPLYING WRAPPERS Filed Dec. 16, 1954 10 Sheets-Sheet 9 Jig. 2r.
Ihventor Albert (bar/es balzz's By 121's Attorney April 22, 1958 A.cl HOLLIS MACHINES ADAPTED FOR APPLYING WRAPPERS Filed Dec. 16. 1954 10 Sheets-Sheet 1O 2.5 a 8 5% i= .wsi E Inventor A/erb C/zczr/es ffo/Zz's By lzzs Attorney United States Patent MACHINES ADAPTED FOR APPLYING WRAPPERS Albert Charles Hollis, Watford, England, assignor to B. U. Supplies & Machinery Company Limited, Leicester, England This invention is concerned with improvements in or relating to machines adapted for applying wrappers and is especially but not exclusively concerned with machines adapted for applying wrappers to small quantifies of loose biscuits.
At the present time there is a demand for small packets of biscuits, say 4-6 ozs. and manufacturers have sold these small quantities wrapped in transparent foil providing packets having eye-appeal and in which the customer can see the biscuits. Biscuit manufacturers naturally wish to apply the foil to the biscuits, in the production of such packets, by machine, but biscuits customarily have two characteristics which make them awkward to handle by machine, viz., (i) lack of uniformity in shape and size even amongst a number of biscuits nominally all of the same shape and size, a characteristic which is pronounced in biscuits of the cream sandwich type, and (ii) lack of resistance to disfigurement, e. g. by crushing, when subjected to pressure by metal machine parts. These characteristics become prominent when it is desired to apply a transparent foil to a small quantity of biscuits by machine since it is usually desired that the foil shall be applied tightly around the biscuits, to prevent relative movement between individual biscuits and to improve the appearance of the packet, but if the machine is adjusted to apply the foil tightly to an undersize biscuit such adjustment may well cause undue pressureto be put upon an oversize biscuit, resulting in crushing which will be visible through the foil and spoil the appeal of the packet.
One of the various objects of the present invention is to provide an improved machine adapted for applying a wrapper to a small quantity of loose biscuits and in the operation of which due regard is paid to the customary characteristics of biscuits as indicated above.
Another of the various objects of the present invention is to provide an improved machine which will apply a Wrapper tightly to an article of the shape of a rectangular paarllelepiped regardless, within limits, of the precise dimensions of the article.
A machine is hereinafter described in detail to illustrate the invention by way of example. This illustrative machine comprises a central horizontal table on to which a wrapper of transparent foil is fed in the operation of the machine, and two groups of mechanism respectively at opposite sides of the table.
Each group of mechanism comprises a carrier member mounted for turning movement about an axis, an arm pivoted to the carrier member, and a supporting bar mounted on the arm. Resilient means in the form of a spring interconnects the carrier member and the arm and tends to turn the arm about its pivot relative to the carrier member and so increase the distance of the supporting bar from said axis. Increase in such distance is checked by a band of flexible, comparatively inextensible, sheet material which is connected to the supporting bar and passes over one edge of the table, the axis about which the respective carrier member turns being adjacent this edge of the table. There are thus two bands of flexible sheet material and each is kept taut, in the operation of the machine, by a spring.
In the operation of the machine articles, e. g. groups of loose biscuits, are transferred by a transfer arm one by one from a rotary turntable and placed upon a wrapper upon the central horizontal table. The carrier members are then turned in opposite directions to swing the bands of flexible material up at opposite sides of the article, applying the wrapper tightly to the article at opposite sides thereof. Where articles to be wrapped vary from one another in horizontal cross-section the bands will flex, and yield against the action of the springs, with pivotal movement of the arms relative to the carrier mem-' bers, to accommodate such variation.
Next the supporting bars movetowards one another over the top of the article, the bands flexing further and again yielding against the action of the springs inaccordance with the precise shape of the article, and the bars then move downwards on top of the article one after another to press opposite end portions of the wrapper downwards against the top of the article in overlapping relation; As will be seen, the bars move in paths determined at least in part by the shape of the article to be wrapped and the bands flex at localities also determined by said shape; the article is subjected to the pressure of the bands which is yielding only and crushing of the work guarded against.
While opposite end portions of the wrapper are held in overlapping relation by the bands of flexible material the end portions are sealed together by heat.
The bars are then swung downwards to bring the hands into horizontal positions, allowing the wrapped article to be pushed off the table into end folding mechanism.
The above and other of the various objects of the present invention will become more clear from the following description, to be read with reference to the accompanying drawings, of the said illustratvie machine; it will be realised that this illustrative machine has been selected for description by way of example and not of limitation of the invention.
in the accompanying drawings:
Figure 1 is a side view of the illustrative machine with certain parts broken away to reveal the mechanism;
Figure 2 is a plan view of 'the illustrative machine;
Figure 3 is a view, partly in section of a feed plate and transfer mechanism as incorporated in the illustrative machine;
Figure 3A is a view in section along the line IIlA-IIIA in Figure 3, showing a detail of the transfer mechanism;
Figure 4 is a plan view of certain parts shown in Figure 3;
Figure 5 is a plan view, partly in section, along the line VV in Figure 3; v A
Figure 6 is a view, partly in section, of certain of the parts shown in Figure l; I
Figure 7 is a front view of folding devices fitted in the illustrative machine; I
Figure 8 is a view of a heat sealing device;
Figures 9, 10, 11 and 12 are side views of different stages of operation of web folding devices as incorporated in the illustrative machine;
Figures 13 and 14 are side views of a cam mechanism;
Figure 15 is a front view of a pusher arm and cam mechanism corresponding to Figure 14;
Figure 16 is a side view of an end folding mechanism;
Figures 17 and 18 are plan views of end folding devices in two stages of operation;
Figure 19 is a timing diagram ot'the various mechanisms incorporated in the illustrative machine;
Figures 20, 21 are side views of an alternative end folding device in two stages of its operation.
3. The illustrative machine comprises a main framework 2 (Fi r hi pp p in pa t of th ma.- chine and drives therefor. The machine has a main driving shaft 4 which is belt driven from a motor 5 (Figure 2) and two cam shafts 6, 8 which are chain driven from the shaft 4, both in a 1:1 ratio.
I In the operation of the machine, articles to be wrapped are placed by hand in pockets 1% (Figures 1 and Z) of a rotary feed mechanism 12. This mechanism consists of a circular base plate 14 rigidly fixed by four pillars 16 to the top of a hollow vertical shaft 18, which is attached to the framework 2 by a horizontal arm 20. The shaft 18 has supported inside it a vertical feed table driving shaft 2.4 which is prevented from moving downwards by a collar which rests on a bearing positioned towards the upper end of the shaft 18. A driving pulley 26 is attached to the lower end of the shaft 24. The upper part of the shaft 24 passes through a hole in the base plate 14, and has rigidly attached to it parallel to and concentric with the base plate 14 the rotary feed plate 28. The pulley 26 is driven from a pulley 30 on the shaft 4 by a belt 31; a pair of tensioning pulleys one of which is shown at 52 (Figure 2) are resiliently attached to the arm 2%, and serve to maintain the tension of the belt when it is required to drive thepulley 26, while allowing the belt to slacken when the pulley 26 is prevented from rotating, as will be described later.
Attached equidistantly around the outer circumference of the feed plate 23 by angle pieces 34 (Figure 3) are the feed pockets it of which there are twelve. The pockets 10 are rectangular in horizontal cross-section and are open at top and bottom. A slot 36 (Figure l) is provided in each pocket to allow for easy removal of any article if necessary. The pockets i l) have outwardly flared top edges to facilitate the placing of articles therein. The feed plate 28 is smaller than the base plate 14, so that articles placed in the pockets 10 rest on the surface of the base plate 14.
The base plate 14 has a rectangular gap 42 (Figure 2) cut in its circumference. Two jaw blades 44, 46 (Figure 4) pivoted at 47 upon the plate 14 and geared together by gears 49 are situated under this gap, and are so arranged that they are normally kept closed by a spring 48. A Bowden cable 50 is attached to the jaw blade 44,
and is actuated by a cam lever 51 (Figure 2) operated In the operation of by a cam 52 on the camshaft 6. the machine the cam 52 depresses the lever 51, and the Bowden cable pulls the jaw blade 44 clockwise against the spring 48 and, because of the gears 49, 49 the jaw blade 46 will move similarly in the other direction, the gap 42 being thus uncovered.
The feed plate 28 is rotated step by step in an anticlockwise direction in the operation of the machine, one step for each cycle. Such rotation is controlled by an arm 54 (Figure 4) which carries a stop 53 arranged to engage each pocket It) in succession and arrest rotation.
The arm 54 lies adjacent to the gap 42 and is mounted on a vertical spindle 63 which passes through the base plate 14. Attached to the lower end of the spindle 63 is a lever 59, pivoted to a link 61 which is itself pivoted to a solenoid bar 57. A micro switch 55 is attached to the framework 2 in such a position that at one point in the cycle, i. e. between the closing of the jaws 44, 46 and their subsequent reopening, it is contacted by a transfer arm operating cam lever 74, which, by closing the switch, activates the solenoid 56, and thus by causing the bar 57 to be drawn into the solenoid serves, through the lever 59 and link 61 to rotate the arm 54 clockwise. This movement, which is against a light spring. .65 and is restricted by stops, moves the stop 53 to an inoperative position. The contact is made by the cam" lever 74 for such a brief period that the arm 54 returns to its original position after one only feed pocket 19 has passed it.
The operation of the feed mechanism 12 is as follows. A pocket 10 containing an article to be wrapped rotates station.
'until it abuts against the stop 53. While this stop preent furth r ro a on h belt 1. Slips on h pull y The article which was previously held in the pocket 10 by the base plate 14 is now resting on the jaw blades 44, 46 which are closed across the gap 42. Under the action of the cam 52 as described previously the jaw blades 44, 46 open, and the article falls into a framework of a transfer mechanism 58 (Figure 3), which removes it by a method to be described later, to a centre seaming Meanwhile the jaw blades 44, 46 are allowed to close and the stop 53 moves out of the way momentarily to allow the empty pocket to pass, and then returns to abut against the next (full) pocket; thus the feed plate 28 rotates one twelfth of a complete rotation and the next pocket is brought over the gap 42.
pillar 33 attached to the base plate 14 carries hinged to it a trip bar 35. This has attached to it a microswitch 37, fitted with a trip lever 39. An end part of the trip bar 35 is bent downwardly and then upwardly into roughly the shape of a V, and the bar is so shaped and situated that it rides over the feed pockets 10 as they rotate intermittently with the feed plate 28. If an empty pocket passes under the bar 35, the V-shaped portion drops into the pocket, and the trip lever 3) contacts an innermost (i. e. furthest from the feed wheel circumference) edge of the pocket and operates the microswitch 37". The switch 37 is connected to an overload trip in a motor starting switch. In normal operation Where the pockets are full the V-shaped portion of 35 rides over the top of the article in the pocket and the trip lever 39 thus rides clear. The parts described thus stop the machine whenever an empty pocket passes under the trip bar 35.
The transfer mechanism 58 is constructed as follows (Figures 3 and 5). A hollow shaft 62 is rotatably supported on another cantilever hollow shaft 64, and is prevented from moving axially by collars 66. To the shaft 62 are attached two rectangular blocks 68, 7t) and a sprocket wheel 72. Over the sprocket wheel 72 passes a chain of which one end is attached to a spring 73, itself attached at its other end to the framework 2, and the other end to the cam lever 74 which is operated upon by a cam 76 on the cam shaft 8 (Figure 6). The blocks 63, 70 have attached to them two parallel shafts 78, to the ends of which is fixed a U-shaped box member 80, the member 86 having two bosses 81 one fixed to each of the shafts 78. Rotatably mounted on each shaft 78 is a swivel tube 82, which is restrained from axial movement by one of the bosses 81 at one end of the tube 82 (henceforth called the upper end) and by one of the blocks 68, 70 at the other, lower, end. At its upper end each tube 82 has attached to it an L-shaped member 84, such that a base part 85 of the L lies perpendicular to the swivel tube, and an arm 86 is an upward extension parallel to the tube. A supporting framework is thus joined by the two members 84 and the member the two arms 86 together form one side of the framework, the member 84) the other three sides and the parts of members 84 the base of the framework. The member 80 has a somewhat flared top edge to allow for the easy entry of articles to be wrapped. Perpendicularly to the lower end of one of the tubes 82 is attached a lever 37 which is linked by a crosspiece 90 to a similar but slightly longer lever 38 attached to the lower end of the other swivel tube. This linkage is so arranged that the two tubes 82 rotate together in opposite directions, and by doing so may cause the arms 86 to move outwardly away from each other thus opening one side of the framework.
A plate 91 attached to the block 68 has attached to it the sheath of a Bowden cable 92, the wire of which passes through a coil spring 94 and is attached to the end of the lever 88. The cable 92 passes loosely through the shaft 64 and at its other end is attached to a cam lever 96 (Figure I) acted on by a cam 98 on the shaft 8 and it will be understood that as the cam 98 is rotated so the arms 86 are caused to move outwardly away from each other.
The operation of the transfer mechanism 58 is as follows. The article is deposited as described above in the framework while the shafts 78 are in a vertical position. The cam 76 then operates on the lever 74 and through the chain causes the shaft 62 to rotate until the shafts 78 and tubes 82 have been brought into a horizontal position: the framework is then immediately above the centre seam forming station and the article is resting on the arms 86, 86. The cam 98, operating on the cam lever 96 and hence on the levers 87, 88, through the Bowden cable 92, causes the tubes 82 to rotate, and thus the arms 86 to move away from each other and deposit the article on a table 324 described hereinafter. The cam 76 then allows the spring 73 to reassert itself and thus the transfer mechanism 58 is brought back into a vertical position until it rests against a rubber locating stop 102 (Figure 3) attached to the underside of the base plate 14 on the inner edge of the gap 42; the arms 86 are allowed to close as the mechanism moves into a vertical position.
The cam 76 is an eccentrically mounted circular disc which acts positively on the lever 74 to cause the downward movement of the transfer mechanism 58. On the upward movement the lever follows the cam until the transfer mechanism 58 is against the stop 102. To prevent excessive strain on the mechanism from the spring 73 trying to rotate it still further the cam lever 74 is at this point brought up against a stationary stop 77 and the cam rides free of the lever until the latter is re-engaged during the next cycle when the transfer mechanism 58 is about to be brought again into the horizontal position.
The article is now resting on the centre seam forming station on top of a piece of cut web 101 (Figure 9) which has been previously placed there by the mechanism and procedure now to be described (Figure 6) and acts as a wrapper. Web 105 is supplied from a roll 104 (Figure 1) which is mounted on a freely rotatable shaft 106 by means of two toothed conical locating and securing members 108, which are adjustably fixed to the shaft by large knurled headed set screws 109. The shaft is supported at its ends by ball bearings 110 which rest in grooves 111 in arms 112 which are extensions of the framework 2. Also attached to the shaft 106 is a wide flanged pulley wheel 114 over which passes a canvas band 116 supporting a weight 118. From the roll 104 the web runs under a jockey roll 120, which is freely rotatable and is supported by arms 122 freely hinged to the framework 2 at 124. The web then passes over another freely rotatable roll 126, which is supported between the two arms 112. These rolls 120, 126 have broad flanges 130 (Figure 2) on them to control the edge of the web 105. From the roll 126 the web passes between a rubber covered stop 132 (Figure 6) and a stop plate 134. The stop 132 is attached to an upwardly extending arm 136 which is freely hinged about a horizontal spindle 138 which is fixed to the framework 2, and it rests on the web under its own weight. The plate 134 prevents the stop arm 136 from hanging vertically and the two together act as a one way feed control. The web 105 can feed forward freely, the stop 132 riding up under the frictional force between it and the web: if the web has a tendency to move in a rearward direction the frictional force between it and the stop 132 pulls the latter downwards onto the plate 134, the web being gripped tightly, and any further movement being prevented. From the one way feed control the web passes between upper and lower feed rolls 140, 142. These are similar in size and construction and are covered with a rubbery material 141, and both have gear wheels 144 the framework 2. The shaft 148 extends clear of the framework 2 at one side of the machine,.and has a sprocket'wheel 150 attached to this extension; this wheel is driven by a chain drive off a large sprocket wheel 152 on the shaft 4. Thus when the machine is in operation the feed roll 142 is rotating continuously, and as long as the two gears 144 are enmeshed the roll 140 will also be in rotation. The roll 140 is supported in bearings in two short levers 154 (Figure 6) which are hinged at 156 on the arms 112 and held rigidly together by a tie rod 158. A spring 159 (Figure 2) attached to'one end of this tie rod and also to the framework 2 urges the roll 140 towards the roll 142. A cam 160 (Figure 6) attached to the shaft 8 actuates a cam lever 162. Attached to one end of this lever and constrained to move in an approximately vertical direction is a rod 164 which abuts onto a flat near one end of the tie rod 158. The cam 160 has a slot 161 cut in it, in which is screwed a replaceable cam piece 163. Theoperating surface of the cam is made up of two arcs of constant but different radius: the arc of lesser radius extends from the leading edge 155 of the slot to a step 165,'the arc of greater radius from the step to the trailing edge 157 of the slot. When a follower on the cam lever 162 rides on the latter are of the cam, no feed takes place as the spring pressure between the feed rolls 140, 142 is relieved: when the follower rides on the former are of the cam, the rolls are sprung together and gripping the web feed it forward. The replaceable cam piece 163 allows alteration in the length of feed, by making it possible to alter, within the limits of the width of the slot 161 the position in which feed of the web ceases owing to the aforementioned follower being forced to rise.
When the feed rolls 140, 142 are separated they will no longer grip the web, which will therefore have a tendency to move backwards under the weight of the jockey roll 120, this roll resting on the web under its own weight. This backward movement is prevented by the stop 132 as described above. Any tendency for the jockey roll 120 to pull the web forward off the roll 104 is counteracted by the canvas band 116 and weight 118 which act as a friction brake on the pulley wheel 114. The web 105 is thus maintained continually at a slight tension. The timing of the feed with respect to the cycle of operations of the machine as well as the amount of web fed, is controlled by the cam 160.
A bar 172 (Figure 6) of rectangular cross section is rigidly supported across the framework 2 of the machine forward of the feed rolls 140, 142. Attached to the bar 172 are two horizontal parallel plates 166, 168 which extend across the greater part of the width of the machine, the plate 168 being vertically above the plate 166, and separated from it by a narrow gap which is maintained uniform by spacing pieces (not shown). Rearward edges of the plates 166, 168 are level with each other, and are tapered to allow them to be introduced between the feed rolls 140, 142 without touching the rolls but approaching closely to the point of contact of the rolls and the web.
If desired both plates may be made capable of slight horizontal adjustment. The lower plate 166 is a little longer than the upper one 168, and thus extends slightly further forward (i. e. to the left in Figure 6) providing a forward extension which serves as a stationary blade 170 for web cutting mechanism. The bar 172 has attached to it at each end next to the framework 2 two vertical brass plates 174, which project above and below it and form guideways for a knife carriage. The carriage consists of a rectangular framework comprising a horizontal cross bar 178, to which a knife is attached, and whose ends run between the guide plates 174, four vertical parallel bars 182 which are attached to the cross bar 178, two near each end, and which have each a vertical surface in sliding contact with one of the guide plates 174, and which pass on either side of the bar 172, and a lower cross bar 134, which is attached to the four vertical bars the guide plates 174. The various rubbing surfaces be-' tween the members of the knife carriage on the one hand and the supporting bar 172 and guide plates 174' on the other are so arranged that relative movement in the vertical direction, within the limits of the construction, is free. A rod 186, attached to the bar 184 by a block 185 is attached at its other end to a cam lever 138 actu- 3 ated by a cam 190 on the cam shaft 8. Two springs 192 urge the bar 184 toward the bar 172. The cam 1963 is thus capable of causing the knife 180 to descend and cut the web, and the springs 192 will urge it upwards out of the way the cutting action being completed. The knife 139 is set at a slight angle to the cutting edge of the blade 170, thus giving a scissor-like action to the cut.
The web feeding action is thus, in outline, as follows. The web 105 passes between the rolls 148 142, between the plates 166, 168 and finishes level with the lower blade 170. At the required moment the two feed rolls 149, 142 are allowed by the cam 166 to approach one another. The requisite amount of web is fed forward between the knife blades onto the centre seam forming station and the feed rolls are then separated. The cam 190 then urges the knife 1811 downward, the web is severed, and rests as required on the centre seam forming station.
The machine comprises centre seaming mechanism which is supported by two transverse bars 318, 318 (Figure 2) across which are fixed longitudinally two end blocks 326), 320. Two web folding devices F, F (Figures 9-12) form the seaming mechanism and are disposed respectively at front and back of a fixed transverse horizontal table 324 (Figure 6) fastened across the blocks 320, 320; the action of the front device F which acts to fold the leading portion of the wrapper 101 round an article 1 will now be described (Figures 9, 10, 11 and 12); the action and components of the other device F are similar and corresponding parts are indicated in the figures by primed numerals.
The operation of the machine will be described with reference to the wrapping of articles, each of the shape of a rectangular parallelepiped, of size 1 by 1 /2" by 331 these being of such a size as to fit loosely in one of the pockets 10 and in the member 80.
An axle 326 (Figures 9, 10, 11 and 12) rotatably mounted in the two blocks 320 has a cantilever end on which is supported a sprocket wheel 328 (Figures 2 and 7) and an arm 330 (Figures 9-12). A chain 329 (Figure 1) passes over the sprocket wheel 328 and has one end i attached to a cam lever 332, which is: urged by a spring 335 against a cam 334 on the shaft 6. The other end of the chain is attached to a coil spring 336 fastened to the main framework 2. A lever 338 is pivotally mounted on the arm 330 and is urged toward straight line relationship with it by a spring 346. At one end the lever 338 has fixed thereto a horizontally extending transverse rod 342 which in turn supports another rod 344, parallel to it, by means of two small rotatable arms 346. A stop 348 is adjustably mounted on the rod 342 and is arranged to restrict the movement of the left hand one of the arms 346. An endless flexible and inextensible canvas band 354 passes round the rod 344, over a bar 356 which is fixed between the blocks 320, and round a bar 352 which is situated below the table. This bar is capable of vertical movement on unthreaded extensions of two vertical screws 35%, 350 (Figure 6) which pass through the bars 32d, and is prevented from moving upwards by shoulders on the screws, and held against downward movement by tension in the band 354, such tension being maintained by the spring 346. The bar 356 acts as a pivot about which the band turns during the operation of the machine.
A cut wrapper 101 and an article l are placed centrally on the table 324 by the previously described mechanisms 8 and processes with the large face of the article 1 in contact with the wrapper 101. At this stage the band 354 lies horizontally at front and rear of the table, as shown in Figure 9. The shaft 326 is then caused to rotate by the cam 334 acting through the cam lever 332, chain 329 and sprocket wheel 328 as described above, which, causing rotation of the arm 330 brings the band 354 andv hence the wrapper 131 lying on it against the vertical front face of the artcle, the position being as shown in Figure 10. Further rotation of the shaft 326 causes relative angular motion of the members 338, 330 against the spring 348, and part of the band'is brought by the rod 344 over the top of the article folding the cut wrapper down as shown in Figures 11 and 12.
The web folding device P which operates on the trailing portion of the cut wrapper 101 is arranged to operate in a similar fashion, with the exception that the folding at the rear of the article is completed before that at the front (Figure 11). The cam 334 has a dwell on it which keeps the folding device F in the position shown in Figure 11 while the cam 334' causes the device F to operate in one continuous movement. This ensures that the leading edge of the wrapper 101 is folded over the trailing edge thereof.
In the machine described, the spring 335 is stronger than the spring 336 so that as the cam 334 rotates and lifts the lever 332 the spring 336 operates to move the shaft 326 anticlockwise (viewing Figure 9) whereas when the cam 334 allows the lever 332 to be lowered the shaft 326 is turned clockwise by the spring 335. The spring. 335 is effectively stronger than the spring 340 so that a position (like that of Figure 12) is reached, with the rod 344 holding the band 354 down on top of the wrapper 161 on top of the article, regardless, within a small range, of the height of the article, the left hand one of the arms 346 becoming disengaged from the stop 348. As will be seen, the band 354 flexes at two localities, viz. localities adjacent to the bottom front edge of the article and adjacent to the top front edge, the precise position of the second locality varying with the actual height ofthe article.
In the open position as shown in Figure 9 the guide 358 pushes the band 354' slightly upwards. When web is fed forwards over the centre seaming station this srrrall rise prevents the leading edge of the web from becoming caught between the band 354 and the rear edge of. the table 324.
When the folding devices F, F are in the position shown in Figure 12 a centre seam sealer 360 (Figure 12) (Figures 7 and 8) descends between them, and, resting on top of the wrapper encircling the article seals. it. The sealer 360 is mounted on a horizontal transverse shaft 362 (Figure 7), which is supported on an arm 364 (Fig ure 8) fixed to a sleeve 366 rotatable about a shaft 368 which is fixed to the main framework 2 of the machine.
The sleeve 366 has attached to it a block 370. A cam 372 (Figure l) on the shaft 6 has a cam lever 374 urged against it by a spring (not shown). Pivotally attached to the lever 374 is a substantially vertical link 376 (Figure 8) whose other end is pivotally attached to a substantially horizontal arm 378. The arm 378 is able to retate about the shaft 368 and has attached to it and projecting transversely from it a pin 380 against which the block 370 rests under the weight of the arm 364 and sealer 360. A spring 382 ensures that the block 370 and pin 380 normally remain in engagement. Rotation of the cam 372 thus, by movement of the pin 380, will allow the sealer 368 to descend, and also can raise it positively. On the sealer 360 striking the top of the article, the pin 38% will continue to move under the influence of the cam 372, and only the effect of the spring 382 and the weight of the sealer 360 urge it against the wrapper: thus approximately the same pressure is obtained whatever the size of the article. The sealer 360 itself comprises a plate 384 between which and a cover plate 386 8 are secured sealing members 388 of L-shaped cross section and which are capable of limited vertical movement between the plates 384, 3815. A hinged cross piece 390 (Figure 7) rests loosely across these two sealing members 388 so that their vertical movements are not independent. Thus small irre ularities in the contour of the article to be sealed can be allowed for. A thermostatically controlled heating element 392 attached to the plate 384 heats the sealing members 388 by conduction.
Attached to the framework 2 of the machine by blocks 194 (Figures 1 and 2) are two parallel horizontal slide rods 1%, one vertically above the other. An H-shaped slide block 198 is hushed onto these and thus can slide in a horizontal direction backwards and forwards. A downwards extending operating lever 202 is hinged near its upper end to the cross bar of the slide block 198 through a spindle 294 and a block 206, and is hinged to the framework 2 near its lower end at 208. A crank 210 on the camshaft 6 has attached to it an adjustable link 212 consisting of two parallel rods 214, passing through two blocks 216, 218, being lengthwise adjustable in these blocks and secured in them by set screws: one of these blocks, 216, is hinged to the crank 210, the other, 218, to another block 228 which is attached to the lever 282, and is capable of adjustment lengthwise along that lever, being fastened to it by a set screw. It will be seen that as the cam shaft 6 rotates, the crank 210 acting through the link 212 and the lever 282 will cause the block 198 to move backwards and forwards along the rods 196, the amount and timing of the movement being controllable within limits by adjustment of the link 212 and movement of the block 220.
Between the upwardly projecting arms of the block 198 is hinged a pusher supporting arm 222 (Figures 2 and 13-15), which projects towards the centre of the machine, and is prevented from falling below the horizontal position by a stop 224 attached to one arm of the block 220 (Figure 15). A block 226 extends perpendicularly down- Wards from the arm 222, and has attached to it a spindle 234 (Figures 13 and 14). 'The spindle 234 has freely pivoted thereon an arm 228 on the end of which is a chamfered cam roll 230. Also attached to the block 226 is a stop 232 which restricts pivotal movement of the arm 228 about the spindle 234. The roll 230 rests on a cam way 236 which has inclined portions 237, 233 (Figure 13) joined by a horizontal portion 239. When the block 188 is in its rearmost position the roll 230 rests on the cam way as shown in Figure 13, and as the block 198 moves forwards the roll 238 trails along the cam way 236 and the end of the arm 222 follows a horizontal path. Trailing along the portion 239 the cam lever 228 is almost horizontal, but along the portion 238 is allowed to fall back under its own weight to a vertical position. The block 198 now begins to move rearwardly. The roll 230 comes up against the incline 238 and is pushed backwards until the arm 228 abuts against the stop 232. The roll 230 then rides up the cam way 236 and travels along the cam way as shown in Figure 14, along the portion 238 the arm 222 is being moved upwardly about its hinged joint with the block 198, along the portion 239 it is carried in an upwardly inclined position and along the portion 237 it is let down into a horizontal position again. The end of the pusher arm thus describes a closed path.
A horizontal arm 241) at the end of the arm 222 supports a rod 242, parallel to the arm 222. The rod 242 has two split blocks 244, 244 clamped to it, each of which supports a depending rod 246, 246. Pivotally mounted on these rods are pushing and rear tucking members 248, 258. Small projections at the rear of these members are joined by a light spring 252 (Figure 18) which thus causes them normally to adopt an open position shown in Figure 17.
When the article 1 is in position with the wrapper 101 on the centre seaming station, as previously described, the devices, F, F are opened out so that the bands 354,
354' are horizontal, the arm 222 is in its most forward position, and the sealer 368 is in a retired position. As the devices F, F wrap the wrapper 101 round the article in the way described, the sealer 360 descends and eventually contacts the wrapper 101 between the rods 344, 344' when the wrapping action is complete. The sealer 360 and the devices F, F now remain stationary .as the arm 222 travels in a rearward direction and is lifted over the centre seaming station by the action of the roll 230. As the arm 222 passes over the centre seaming station the folding devices F, F open out into their horizontal position; when this is completed the arm 222 descends into a horizontal position behind the article so that the members 248, 250 are just above the now horizontal portion of the band 354'. As the members 248, 250 move forward the sealer 360 retires, and inner end portions 249 of the members 248, 250 engage the rear face of the article and carry it forward. The article is now encircled by a tube of web, sealed at the top, and extending beyond the article at each end. The article is carried forward off the table 324, over the forward band 354 and on to a horizontal platform 257 (Figures 2 and 17). As it moves forward the leading face of the article comes into contact with the rear face of the previous article wrapped, and the additional pressure causes the members 248, 250 to pivot about their supports inwardly against the spring 252 thus forming rear tucks, i. e. tucks in the rear parts of the extensions of the web. The forward movement brings the front parts of the extensions of the web into contact with forward tucking and folding members 258, 260, which as the article moves forward form forward tucks (Figure 18). The movement of the members 248, 250 carries them in between the members 258, 260 so that when the members 248, 250 retire, the members 258, 260 secure the rear tucks against springing outwards. As the article is being carried forward, the transfer mechanism 58, as previously described placesanother article on the centre seaming station on top of a piece of severed web, and the wrapping cycle recommences. The operation of the machine pushes a succession of articles one by one on to the platform 257 and between the two members 258, 260, and hence articles are pushed one by one into end folding mechanism now to be described.
Two cross bars 254, 256 (Figure 2) rigidly attached to the framework 2 support the platform 257. Arranged in pairs on either side of this platform are six end tucking and folding members 258, 260, 262, 264, 266, 268. The three members 258, 262, 266 are rigidly fixed to the left hand side of the platform. On the right hand side, the member 260 is rigidly attached to a base plate 270 by a shaft 276. The plate 270 has fixed to it three parallel pillars, each consisting of a screw 278 on which a sleeve 280 is secured by a nut 282 and a washer 284. The sleeves abut against the base plate 270 and pass slidably through holes in a longitudinal supporting bar 286; a spring 288 on each of the sleeves urges the base plate 270 away from the bar 286, the washers 284 forming a limit stop to movement in this direction. Thus the base plate 270 and hence the member 260 attached to it is capable of limited movement against the springs 288 in a direction substantially perpendicular to the plane of the base plate. The members 264, 268 are similarly mounted for movement to the right against the action of springs.
The supporting bar 286 has attached to it two angle pieces 290 which rest on the two cross bars 254, 256. Screws pass through holes in horizontal portions of each of these angle pieces, and through slots 292 in each of the cross bars 254, 256, and are secured by nuts on the underside; thus by the slackening of these nuts the bar 286 and all that it supports is capable of horizontal adjustment to alter the distance between the members 258, 262, 266 on the one hand and 260, 264, 268 on the other. The spring mounting of these members is provided to ensure that the members are pressed up against the articles, regardless of small variations in size.
asansos The members 258, 260 are outwardly flared to receive the article and also to make the forward end tuck. They are arranged so that the horizontal sideways extensions of the wrapper may pass undisturbed over and under them. Lower end flaps are then folded upward by the action of a guideway formed between the members 262 and 258 on the left hand side and 264 and 260 (Figure 16) on the right hand side: upper end flaps are folded downwards by similar guideways formed between members 262 and 266 on the left and 264 and 268 on the right. While the lower flaps are being folded upwards the article is resiliently forced downwards by leaf springs 294, 294. The folding members 266 and 268 have horizontal flanges extending inwardly and backwardly, and as the upper flaps are being folded down the article is forced upwards against these flanges by leaf springs 296, 298. The spring 296 is attached to the platform 257 at 309, and the spring 298 to a small plate 301 which is attached to the bar 256, and being adjustable widthwise is normally maintained as close as possible to and parallel with member 268. Rear ends of the springs 296, 298 are free and pass under the platform, so that an article can slide smoothly onto them. The action of the springs 296, 298 is reinforced by two more leaf springs 392, attached to a bar 304 underneath the platform 257. The springs 302 bear up through the platform 257 under the springs 296, 298. The effect of the vertical spring pressure during the end folding operations is to allow considerable variation in the height of the article while maintaining a neat and tight end fold, without requiring any adjustment.
End sealers 306, 308 (Figure 2) are mounted forward of the members 266, 268 on arms 310, 312. The sealers 306, 308 have their ends bent to form a flat sealing portion, the edges of which are rounded, which portions are arranged to bear on the articles as they pass. The sealing portions are heated by conduction from heating elements 314. The arm 312 is hinged at 316 against a spring 317, and being attached to the bar 236 is moved with that bar on adjustment for various sizes of article. The arm 310 is rigidly fixed to the bar 256. When the machine is in correct adjustment the article is a little wider than the space between the two sealing plates and so sealing is carried out under pressure from the spring 317.
As described above, the articles are pushed one by one in a continuous line past the end folding members, having successively the lower flap folded upwards, the upper flap folded downwards and the ends sealed. Being pushed out one by one from the sealers 306, 308, the articles may be allowed to drop into a suitable container or removed on a conveyor if desired.
In a modified version of the web folding device (Figures 20, 21) a sheet of flexible and inextensible canvas 394 is attached to a table 400 and also to a transverse supporting bar 395. The bar 395 is fixed to an arm 396 which is slidably mounted in a member 398, and which is urged lengthwise in a direction so as to tension the sheet 394 by a spring 3%. The member 398 is attached to a shaft 399 which can be rotated by means similar to those previously described for effecting the rotation of the shaft 326.
An article 1 is placed on the wrapper 101 on the table 4-30 by mechanism and processes previously described: the sheet 394 is held in a substantially horizontal position. On rotation of the shaft 399 the arm 396 is moved so that the sheet 394- applies the wrapper 101 to the vertical face of the article i, and then, flexing at the upper edge of the article, presses the wrapper 191 down on to the upper face of the article (Figure 21).
it will be understood that two such devices will be required to perform a complete wrap and that the sealing and end folding operations follow as before.
Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:
l. A machine for applying wrappers to articles, comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, and resilient means for rotating the lever in a direction to maintain the band taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the Wrapper into close engagement with the sides and top of an article located upon the wrapper.
2. A machine for applying wrappers to articles, comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, and resilient means for rotating the lever in a direction to maintain the band taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the wrapper into close engagement with the sides and top of an article located upon the wrapper, the means for moving the arms being constructed and arranged to move one of the arms in advance of the other thus to eifect an overlapping of the ends of the wrapper on the top of the article.
3. A machine for applying wrappers to articles, comprising a horizontal support upon which a wrapper may be positioned, cooperating wrapping mechanisms oppositely disposed relatively to the support, each of said mechanisms comprising a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the support, a lever pivotally mounted upon the arm, a flexible hand one end of which is secured to the frame of the machine beneath the support, the other end of the band being secured to the lever, resilient means for rotating the lever in a direction to maintain the baud taut, together with means for rotating both arms upwardly and inwardly relatively to the support to cause the bands progressively to bend the wrapper into close engagement with the sides and top of an article located upon the wrapper, the means for moving the arms being constructed and arranged to move one of the arms in advance of the other thus to effect an overlapping of the ends of the wrapper on the top of the article, and means for sealing the overlapping ends of the wrapper.
4. A machine for applying wrappers to articles, comprising a horizontal support upon which a wrapper may be positioned, a bar located beneath the support, a pivot below the support, an arm mounted on the pivot for arcuate movement heightwise of the plane of the support, a lever pivoted on the arm, a flexible hand, one end of which is secured to the frame of the machine beneath the support, the band having a portion extending over the bar and outwardly from beneath the support, the other end of the band being secured to the lever, resilient means for rotating the lever relatively to the arm in a direction to maintain the band taut, and means for rotating the arm about its pivot upwardly and inwardly of the support to cause the band to bend the wrapper progressively about the side and top of an article located upon the wrapper.
5. A machine for applying wrappers to articles, comprising a horizontal support upon which a wrapper may be positioned, a bar located beneath the support, an arm pivotally mounted below the plane of the support for arcuate movement heightwise of the support, a lever pivotally mounted on the arm and having an end portion normally disposed outwardly of the support, a flexible band of sheet References Cited in the file of this patent UNITED STATES PATENTS Fischer Ian. 30, 1912 I Bronander Apr. 30, 1929 Heilman Sept. 15, 1953 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No 2 831 303 April 22, 1958 Albert Charles Hollis It is hereby certified. that @rror appiaars in the above nuxubarGfi patent requiring correction. and that the said Letters Patant should read as corrected bslowo In the heading to the print-ad spaoifioation batw eon lines .6
and '7 insert m Claims priority, application Great Britain December 18;, 1953 Signed and. sealed this 16th day of Saptembar 1958;,
KARL Zia AEINE ROBERT C. WATSON Attesting Officer Comisaioner of Patentsz
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237370A (en) * 1962-06-21 1966-03-01 West Virginia Pulp & Paper Co Packaging machine
DE1217266B (en) * 1962-04-14 1966-05-18 Benz & Hilgers G M B H Device for producing, conveying and shaping packaging blanks from paper and / or from a plastic or metal foil
US3267642A (en) * 1963-01-28 1966-08-23 Forgrove Mach Wrapping machines
US3293826A (en) * 1964-02-21 1966-12-27 Gellman Mfg Co Paper feed and tensioning device for use in article wrapping machines
US3724159A (en) * 1970-05-21 1973-04-03 British Iron Steel Research Apparatus and method for packaging
US3869846A (en) * 1972-08-02 1975-03-11 Packautomatic Gmbh & Co Kg Folding device for packaging machines
US3971686A (en) * 1972-06-01 1976-07-27 Joseph Edward Kienel Label applying method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1016067A (en) * 1909-02-19 1912-01-30 Herman O Fischer Wrapping-machine.
US1710689A (en) * 1929-04-30 Assig-nobs to
US2651900A (en) * 1951-07-05 1953-09-15 L A Young Spring & Wire Corp Wrapping machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1710689A (en) * 1929-04-30 Assig-nobs to
US1016067A (en) * 1909-02-19 1912-01-30 Herman O Fischer Wrapping-machine.
US2651900A (en) * 1951-07-05 1953-09-15 L A Young Spring & Wire Corp Wrapping machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1217266B (en) * 1962-04-14 1966-05-18 Benz & Hilgers G M B H Device for producing, conveying and shaping packaging blanks from paper and / or from a plastic or metal foil
US3237370A (en) * 1962-06-21 1966-03-01 West Virginia Pulp & Paper Co Packaging machine
US3267642A (en) * 1963-01-28 1966-08-23 Forgrove Mach Wrapping machines
US3293826A (en) * 1964-02-21 1966-12-27 Gellman Mfg Co Paper feed and tensioning device for use in article wrapping machines
US3724159A (en) * 1970-05-21 1973-04-03 British Iron Steel Research Apparatus and method for packaging
US3971686A (en) * 1972-06-01 1976-07-27 Joseph Edward Kienel Label applying method
US3869846A (en) * 1972-08-02 1975-03-11 Packautomatic Gmbh & Co Kg Folding device for packaging machines

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