CA1072437A - Bag in box - Google Patents
Bag in boxInfo
- Publication number
- CA1072437A CA1072437A CA258,583A CA258583A CA1072437A CA 1072437 A CA1072437 A CA 1072437A CA 258583 A CA258583 A CA 258583A CA 1072437 A CA1072437 A CA 1072437A
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- CA
- Canada
- Prior art keywords
- carton
- bag
- mandrel
- seal
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Abstract A method of packaging particulate material in a carton within a flexible bag comprising forming a tube of flexible material, sealing a narrow length of the tube transversely to provide a bag length above the seal closed at the bottom and open at the top and a bag length below the seal closed at the bottom and top, and severing the tube at the seal to separate the bag below the seal from the bag above the seal and while sealing and severing the tube to form the bags, filling the bag length above the seal to a pre-determined level. The bag length below the seal is gravitationally dropped into the open top of the carton and while dropping its side walls are confined so as to have a cross section corresponding to the inside cross section of the carton.
Description
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There are numerous patented bag form-ing and filling machines of the kind with which thls invention is concerned constructed to form continuous flexible sheet materlal into a tube, seal the tube transversely to form an open bag above the seal for receiving the particulate material to be packaged and a closed bag below the seal already filled with material. The tube is severed simultaneously with the sealing at the seal so that a portion of the seal forms the closed bottom of the bag above the seal and a portion of the seal forms the top of the bag below the seal. The severed bag below the seal is dropped into a receiver and if it is to be cartoned delivered from the receiver to a place of cartoning. Such apparatus is disclosed in United States patents 2,154,521 and 3,774,509. There are several problems involved in cartoning bags filled as related above which arise from the fact that the machine is vertical rather than horizontal and particular to the character-istics of particulate material, to wit, its lack of shape, its weight and its bulk or lack of bulk. In a vertical machine such as is concerned the material is gravitationally deposited through the tube into the formed bag and because of its particulate nature tends to expand the lower end of the bag so that the bag is pear shaped and this makes it difficult to introduce it into a carton of a predetermined size. ~lso, if the material is heavy it tends to burst the seal at the bottom of the bag while the latter is still weak and if the material is light and bulky it fills the bag lPngth to a greater height than the height of the carton so that the only alternative is to use a larger carton and this is uneconomical and also objectionable to the customer. It is the purpose of this invention to provide an improved machine which will in large part eliminate the problems heretofore experienced.
SU~RY OF THE INVENTION
From one aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertical-ly disposed forming mandrel on which sheet material is formed into a continu-ous tube, said forming mandrel having a lower end corresponding in cross section to the inside cross sect-lon of the carton within which the bag is to be deposited, a support below the mandrel for supporting a carton standing -1- ~
~7Z9~37 upright thereon, sealing means located between the lower end of the mandrel and the carton support operable at times to seal the tube transversely to form a bag length above the seal, means for supplying material through the mandrel into the bag length to completely fill the same while the sealing means remains in seal forming relation, said mandrel serving to confine the ba~ to the cross section oE the container during filling, means below the sealing means defining a vertical passage extending from the lower side oE
the sealing means down to the open top of the carton therebelow thru which the filled bag is adapted to descend into the open top of the car-ton, said means constraining the bag to the cross section of the carton throughout the downward movement of the bag, means for lowering the filled bag thru said last named means into the open top of the carton to a position such that the lower end of the bag enters the open top of the carton while still confined within said means and before it is severed from the succeeding tube and means for severing the suspended bag from the succeedlng tube so that it drops gravitationally thru said means to the bottom of the carton.
From another aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertical-ly disposed forming mandrel, means for forming shee~ material into a tube on the mandrel and moving it downwardly thereon in tubular form from the lower end of the mandrel, means for moving empty carton to a position below the mandrel and from thence away from the lower end of the mandrel, means for at times sealing the tube transversely to form a bag length extending from the mandrel down to the sealing means adapted to be filled through the mandrel, means for completely fi.lling the bag, said mandrel corresponding in cross section to the cartons and serving to confine the bag to the cross section of the cartons during filling, means for releasing the filled bag and moving it downwardly toward the carton support, and means situated below the sealing means for constraining the sides of the filled bag to a cross section of the carton as it moves downwardly lnto the open top of the carton, said means extending substantially continuollsly from the sealing means onto the open top of the carton so that the filled bag is constrained to the cross section of
There are numerous patented bag form-ing and filling machines of the kind with which thls invention is concerned constructed to form continuous flexible sheet materlal into a tube, seal the tube transversely to form an open bag above the seal for receiving the particulate material to be packaged and a closed bag below the seal already filled with material. The tube is severed simultaneously with the sealing at the seal so that a portion of the seal forms the closed bottom of the bag above the seal and a portion of the seal forms the top of the bag below the seal. The severed bag below the seal is dropped into a receiver and if it is to be cartoned delivered from the receiver to a place of cartoning. Such apparatus is disclosed in United States patents 2,154,521 and 3,774,509. There are several problems involved in cartoning bags filled as related above which arise from the fact that the machine is vertical rather than horizontal and particular to the character-istics of particulate material, to wit, its lack of shape, its weight and its bulk or lack of bulk. In a vertical machine such as is concerned the material is gravitationally deposited through the tube into the formed bag and because of its particulate nature tends to expand the lower end of the bag so that the bag is pear shaped and this makes it difficult to introduce it into a carton of a predetermined size. ~lso, if the material is heavy it tends to burst the seal at the bottom of the bag while the latter is still weak and if the material is light and bulky it fills the bag lPngth to a greater height than the height of the carton so that the only alternative is to use a larger carton and this is uneconomical and also objectionable to the customer. It is the purpose of this invention to provide an improved machine which will in large part eliminate the problems heretofore experienced.
SU~RY OF THE INVENTION
From one aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertical-ly disposed forming mandrel on which sheet material is formed into a continu-ous tube, said forming mandrel having a lower end corresponding in cross section to the inside cross sect-lon of the carton within which the bag is to be deposited, a support below the mandrel for supporting a carton standing -1- ~
~7Z9~37 upright thereon, sealing means located between the lower end of the mandrel and the carton support operable at times to seal the tube transversely to form a bag length above the seal, means for supplying material through the mandrel into the bag length to completely fill the same while the sealing means remains in seal forming relation, said mandrel serving to confine the ba~ to the cross section oE the container during filling, means below the sealing means defining a vertical passage extending from the lower side oE
the sealing means down to the open top of the carton therebelow thru which the filled bag is adapted to descend into the open top of the car-ton, said means constraining the bag to the cross section of the carton throughout the downward movement of the bag, means for lowering the filled bag thru said last named means into the open top of the carton to a position such that the lower end of the bag enters the open top of the carton while still confined within said means and before it is severed from the succeeding tube and means for severing the suspended bag from the succeedlng tube so that it drops gravitationally thru said means to the bottom of the carton.
From another aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertical-ly disposed forming mandrel, means for forming shee~ material into a tube on the mandrel and moving it downwardly thereon in tubular form from the lower end of the mandrel, means for moving empty carton to a position below the mandrel and from thence away from the lower end of the mandrel, means for at times sealing the tube transversely to form a bag length extending from the mandrel down to the sealing means adapted to be filled through the mandrel, means for completely fi.lling the bag, said mandrel corresponding in cross section to the cartons and serving to confine the bag to the cross section of the cartons during filling, means for releasing the filled bag and moving it downwardly toward the carton support, and means situated below the sealing means for constraining the sides of the filled bag to a cross section of the carton as it moves downwardly lnto the open top of the carton, said means extending substantially continuollsly from the sealing means onto the open top of the carton so that the filled bag is constrained to the cross section of
-2-~7~4~7 the carton throughout its movement from the lower end of the mandrel into the open end of the carton.
From a further aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons comprising, a hollow vertical-ly disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon in tubular fo~m from the lower end of the mandrel, said lower end of the mandrel corresponding substantially in cross section to the inside cross section of the carton within which the bag is to be inserted, a carton support, means for moving the carton support to advance cartons in succession below the mandrel, means at the lower end of the mandrel for at times forming a seal transversely of the tube to form a bag length above the seal closed at its bottom and open at its top for receiv-ing the material to be pac~aged, means for supplying material through the mandrel into the bag length to completely fill the same, means for severing the bag during the formation of the seal, means for releasing the closed bottom of the bag for movement downwardly toward the top of a carton on the support and means situated between the sealing means and the carton having a hollow cross section corresponding substantially to the cross section of the carton through which the filled bag is guided into the open end of the carton.
From yet another aspect, the invention provides apparatus for form-ing, filling and inserting filled bags into cartons comprising a hollow vertically disposed forming mandrel and therebelow successively sealing means and a carton support, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon, said mandrel having a lower end corresponding substantially in cross section to the inside cross section of the carton, means for at times sealing the tube transversely and releasing it to form a bag length above the seal and a bag length below the seal, said means being operable to maintain the seal Eor a predetermined length of time such as to consummate the seal, means for supplying material through the mandrel completely fill the bag length above the sPal during said predeter-mined time, opposed channel-shaped guide members situated between the sealing means and ~he top of the carton resting on the support which collectively ~''î'l .1 -3-~7~437 define a vertical p~ssage corresponding in cross section to the inside of the carton through which the filled bag is caused to descen~ into the carton, means on the guide members for engagement with the top of the carton resting on the support to hold the top of the carton in registration with the guide -members during deposit of the bag and means for raising and lowering the guide members following each deposit of the bags to permit a filled carton to be removed and an empty carton to be positioned for insertion of a bag.
In the disclosed embodiment, lowering of the filled bag downwardly on the mandrel is effected by oppositely-disposed endless belts, portions of which run parallel to the opposite sides of ~he mandrel. l`he means for at times forming seals transversely of the tube comprise sealing jaws having opposed faces between which the sides of the tube are pressed to form a seal and upwardly-facing flat surfaces for supporting the bottom of a bag at opposite sides of the seal during filling. The sealing jaws are maintained in sealing relation to the tube for a predetermined time sufficient to effect consummation of the seal. The suspended bag is severed by cutting blades operable in conjunction with the sealing means to sever the tube within the area of the seal to form a filled bag closed at the bottom and at the top, or to sever the tube below the seal to form a bag closed at the bottom and open at the top. The mandrel corresponds in cross section to the cross section of the container and serves to hold the tube expanded to the cross section of the carton and the sides of the filled bag are constrained to the cross sec-tion of the carton as it moves downwardly into the open top of the carton by opposed channel-shaped guide members situated between the sealing means and the top of the carton resting on the support which collectively define a vertical passage corresponding in cross section to the inside of the carton.
There is means on the guide members for engagement w~th the top of the carton to hold the top of the carton in registration with the guide member during deposit of the filled bag and means for raising and lowering the guide members following the deposit of the bag to permit a filled carton to be moved and an empty carton to be positioned for insertion of a bag. The support is desir-ably in the form of a conveyor provided with a horizontal run for moving ..
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empty cartons into pos:ltlon for loa~ing of bags thereinto and discharging the filled cartons from the place of loading. There is also means for effecting vi~ration of the channel shaped guide members and, optionally, means for effecting vibration of the cartons following deposit of the bags therein by effecting vibration of the conveyor. Finally, there is means opera~le after the loaded cartons leave the place of loading for sealing the tops of the open-top bags, applying adhesive to the closure flaps and folding them in engagement over the top of the carton.
The invention will now be described in greater detail and by way of example only, with reference to the accompanying drawings, wherein:
Figure 1 is a front elevation of a vertical forming and filling machine according to this invention;
1 Figure 2 is a side elevation as seen from the right side of Figure Figure 3 is an enlarged fragmentary front elevation of the machine showing the means for guiding the filled bags into the cartons;
-~a-f- ~ ~[)7Z~3~ 1 FIGURE 4 is a side view of FIGURE 3 as seen from the rlght side thereof;
FIGU~E 5 is a partial elevation from the right side of the l apparatus as shown in FIGURE 1, showing the seal.ing and severing 5 ¦ means in section and the bbttom of a bag before it is flattened by . ¦ the weight of the material being deposited therein;
FIGURE 6 is a view similar in part to FIGURE 5, showing the bottom of the bag flattened and supported by the upwardly facing ¦ surfaces of the sealing ~aws and the showing in elevation of the 10 1 guiding means for introducing the bag into the carton;
` I FIGURE 6A is a section similar to FIGURE 5 showing the sealing jaws cut away below the cutting blades;
FIGURE 7 is a view taken on the line 7-7 of FIGURES 5 and 6;
¦ FIGURE 8 is a horizontal section taken on the line 8-8 of 15 1 FIGURE 6;
FIGURE 9 is a front elevation taken on the line 9-9 of ¦ FIGURE 6;
FIGURE 10 is a plan view taken on the line 10-10 of FIGURE i l FIGURE 11 is a plan view taken on the line 11-11 of FIGURE
20 1 12;
FIGUR~ 12 is an elevation of FIGURE 11, and FIGURE 13`is a fragmentary view taken on the line 13-13 of FIGURE 12.
l Referring to the drawings, Figures 1 and 2, the apparatus 25 ¦ f this invention is a vertic~l type forming and filling machine . ¦ comprising a base frame 10 on which there is supported vertlcally a hollow forming and filling mandrel 12 to which there is supplied flexible sheet material 14 for forming into a c~ntinuous.tube on ¦the mandrel and above whlch there is supported a hopper 16 for 3o ¦supplying the material to be packaged. At the lower end of the ¦mandrel there ls means 18 for moving the formed tube downwardly ~ . . . . .. . , _ . , . . . _ . , 7;2~37 thereon and sealing and severing mean~s 20a, 20b for forming the tube lnto bag lengths and separating the lengths into separate bags. A side seam sealing element 19 is mounted axially o~ the mandr~ for continuously forming a side seam. ~11 of this structure is conventional and shown in one or more of the patents referred to above.
It is customary after forming and fill~ng the bags on a machine of this type to drop them on to a receiver and to deliver them from the receiver by a conveyor or the like to a place of cartoning if the bags are to be placed within cartons.
Due to the fact that the particulate material tends to settle at the bottoms of the bags and the bags are not shape retaining it becomes difficult to insert them into the cartons within which they are to be packaged. In one instance, as shown in patent 3,314,210 this difficulty was sought to be overcome by only partially filling the bag as it was formed, dropping it directly into a carton supported below the forming and filling tube ~nd thereafter completing the filling operation. According to this invention the filling is completed and the filled bags inserted into the cartons in one operation. To achieve this the ~ollow mandrel 12 is formed at its lower end as shown in Figure~
l, 3 and 7 to have a cross section corresponding substantially to the inside cross section of the carton within which the bag is to le packaged. Since this carton is of rectangular cross section Ithe lower end of the mandrel is correspondingly rectangular in ross section. As thus formed, the sheet material delivered rom the lower end of the mandrel has a cross section corresponding ubstantially to the inside of the carton. If it should be ~esirable to employ a carton of other than rectangular cross sectlo ~' l ',13~
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7Z~37 the lower end of then~l~el will be made of corresponding cross section so as to rorm the tube as it leaves the lower end of -the man~el to the cross section of the carton. Delivery of the shaped side seamed tubular material from the lower end of the mandrel is ef~ected by means of driven belts 22-22, Figure 3, supported at opposite sides of the mandrel.
The cartons C into which the filled bags are to be inserted are supported below the mandrel on conveyor means 24, Figures 3, 11 and 12, which delivers the cartons one at a time below the mandrel in timed relation with the filling operation and in accordance with this invention in order to guide the filled ba~ smoothly into the open topsof the cartons there is provided guide means comprising a pair of opposed channel members 26-26, Flgures 3, 6, and 8, which are supported below the sealing and severing means and above the open tops of the cartons resting on the conveyor 24 therebelow. Each channel member 26 has a side wall 28 and right angularly disposed front and back walls 30-30 for engagement with the sides of the formed bags and the front and back walls. In conjunction, as shown in Figure 8~ they provid~
an opening corresponding substantially in cross section to the lower end of the mandrel so as to receive a filled bag as the latter is lowered toward the open top of the carton for guiding it into the open top of the carton and for simultaneously prevent-ing the slde walls from bulglng, in other words, preserving the cross sectional shape of the bag as it is delivered from the mandrel. The upper ends of the channels are provided with the flaring lips 29, Figures 3 and 6, to insure admission of the ~bags.
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r-l ~L~7Z~37 The guide means comprising the channel~ 26-26 are supported for movement up and down relative to the conveyor 24 and there is provide~ means :~or movement therewith to enter the open top of the carton t-o hold the end and sLde closure flaps erect. ITo provide for such movement t~e channels are mounted between the forward ends of a pair of transversely spaced arms 31-31, Figures 6 and 10, fixed at their rear ends on a horizontal shaft 32, the latter being mounted at its opposite ends on bracket members 34-34. The bracket members, Figure 9, contain vertical slots 38-38 for receiving attaching bolts 42 by , means of which the height of the guiding means may be ad~usted.
A pneumatic cylinder 44 is mounted on a bracket 46 below the guiding means from which projects upwardly a rod 48 and this is pivotally connected by a yoke 50 to an arm 52~ the upper end of which is forked for receiving the ends of ~ shaft 54 fixed to the forward end of an arm 55. The rear end of the arm 55 is fixed to the shaft 32. Coiled springs 56-56 connected at one end to the shaft 54 and at thelr opposite ends to a rod 58 secured to the bracket 46 operate to normally pull the arm 55 downwardly to a horizontal position as shown in Figure 8. Pressure supplie to the cylinder 44 will move the arm 55 upwardly ~o in turn move : the channel members upwardly to clear the upper ends of cartons being moved into position below them.
The means for holding the end and the side closure flaps ereCt comprlse downwardly extending parts 62-62 and 64 64. The parts 62-62 comprise vertical extensions of the end walls 28~28 ,. and have beveled corner portions 66-66 so that as the channels are moved downwardly the beveled porti.ons enter between the front and l back closure flaps and cam them apark. The parts 64-64 are relat~vely narrow plates pivotally suppor~don horizontally ':~
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107'~4~37 disposed spindle~ 67-67, the latter being fixed to bracket plates 68-68 bolted to end walls 28-28 o~ the channel member~. Springs 70-70 on the spindles anchored at one end 72 to the bracket plates 68-68 and at their other ends to the parts 64-64 bias the plates inwardly t~ward each other as illustrated in dotted lines in Figure 9 when the channel members are raised to their upper positions. As the channel members are lowered the upper ends of these parts are engaged by abutments 76-76 fixed to angle members 77-77 and caused to be displaced outwardly to the full line positions shown in Figure 9 to force the end closure ~laps outwardly to vertical positions. The angle members contain slots 79-79 for receiving bolts 81-81 by means of which they are adjustably mounted to the brackets 34 34.
The sealing means 20a in one form, as illustrated herein, Figures 5 and 6, comprises a pair of opposed jaws 100-100 support ~or horizontal reciprocation toward and frorn each other whlch have vertically disposed flat faces 102-102 for engagement with the front and back sides of the tube to press them together to seal a narrow length of the tube as shown in Figure 5, extending from top to bottom of the faces of the jaws. For the purpose of seal-ing, the jaws are heated although it should be understood that it is within the scope of the invention to employ self-sealing material which when pressed together will form a permanent seal.
The jaws have a vertical depth which is sufficient to form a seal d area which is adapted to be severed intermediate its upper and lower boundaries to form a seal at the lower end of the bag above the jaws and a seal at the upper end of the bag below the jaws.
The severing means 20b comprises cut-ting blades 104-104 which are recessed into the jaws 100-100 for horizontal movemenk, after the jaws are brought together, to cut khrough the sealed area .
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Il jlWhen a structure of this kind is employed, as soon as the Jaws ¦¦are retracted,the bag at the lower side of the ~aws is released whereupon it gravitationally descends throu~h the guiding means land into the carton.
¦ It may be desirable under certain circumstances to leave ¦the top of the bag below the jaws open until it is deposited in-¦the carton and if thisis the case the lower portions of the jaws 100-100 below the cutting blades 104-10~ are beveled as shown in Figure 6a so that the seal takes place only above the cutting blades. The tube below the cutting blades is not sealed and so the bag length formed by severing the tube remains open at the top and will drop downwardly through the guiding means into the carton. When operating in this fashion there is provided means 101 as shown in Figures 11 and 12 for sealing the upper open ends of the bags while within the cartons after the latter are moved away from the lower end of the mandrel by the conveyor 24.
A problem which has been troublesome with prior forming and filling apparatus of this kind has been that the weight of the material deposited in the bags, particularly if the ~laterial is relatively heavy, bursts the bottom seam of the bag before the seam becomes firm and so in accordance with this invention the sealing jaws 100-100 are provided at their upper sides, Flgures 5 ànd 6, with flat supporting surfaces 78-78 upon which the lower end of the bag at each side of the seam is adapted to rest during the filling operation. Figure 5 shows the shape of the lower end of the bag before it is filled and also the shape it would have if the material ~ras very light weight. A heavy material will depress the bottom into engagement with the surfaces 78-78. The operation of the apparatus is designed to hold the sealing ~aws 3o 100-100 engaged with the bottom seam unt.i.l the bag is completely .~ -10_ , l 31302 ~7~7 filled and f`or a sufficient length of time to perfect the seal by allowing it to become set before the sealing ~aws are retracted to permit the bag to be dropped down for deposit into the carton i therebelow. An additional advantage is achieved by this means in !. 5 that thle supporting surfaces 78-78 contribute to forming a bag :~` the entire length of which is substantlally of uniform cross section. This pr~vides for a maximum fill volume and minimum bag length even when the botto~ seal is of the pillow sllp type. It is~ of course, within the scope of the invention to have a gusset type bottom and for this purpose there are provided tucking member 80-80, Figure 3, of conventional construction which~are arranged to move horizontally inwardly over the top of the sealing ~aws ; and below the lower end of the forming mandrel. If a pillow slip . type of seal is to be made the tucking members are withheld from ?~ 15 opèration. There are also tucking membersl~82-82 below the sealing , and severing means which are correspondingly moved inwardly with the upper tucking members to form tucks at the upper ends of the bags if desired.
As previously related, the guiding means comprising the channel members 26-26 are arranged to maintain the cross section of the bag as it descends from the mandrel toward~the top of the ¦carton in substantially the configuration and cross section of the carton. It is sometimes found advantageous to insure symmetry of .~ the cross section of the package and uniformity o~ diskribution of the material in the bag ~rom top to boktom to vibrate the bag ' either while it is being guided downwardly into the carton or : fter is is deposited in the carton. For the purpose of vibrating ~ the bag while it ls being guided downwardly into the carton there 1 is provided, ~s shown in Figures 6, 9 and 10, eccentrics 84-84 3o fixed to a horizontal sha~t 86. The eccentrics 84-84 bear against f'- :~7~2437 hardened plates ~ secure(l t;o the undersides of the arms 31-31 so that rotation of the eccentrlcs rapidly raises and lowers the arms a very slight amount. The sha~t 86 is rotated by means of a pulley 80a, Figure 2, fastenec1 to it about which is entrained one end of a belt 92 The opposite end of the belt 92 is entrained about a pulley 94 on the drive shaft 96 of a motor 98.
Instea~ o~ effecting vibration of the channel members as thus described, it is within the scope of the invention to effect vibration of the cartons while resting on the conveyor 24 by means of eccentrics 91 supported in engagement with the underside of the conveyor 24, Figures 12 and 13. The eccentrics 91 are fixed to shafts 93 to which are fixed sprockets 93a about which are en-trained a chain 93b One of the shafts, 93 is connected by beveled gears 95,97, a shaft 99 and beveled gears 103 and 105 to the shaft 86.
In accordance with the method of operation of this . apparatus when packaging lightweight bulky material which does not settle very well into the bag during the bag filling operation the bag is f-illed to a higher level than the depth o~ the carton, the over-fi].led bag is severed from the succeeding bag and vibrate either by the guide means or when deposited in the carton resting on the conveyor as related above to cause the bulky material to settle sufficiently so that the vertical height of the bag does not exceed that of the carton. When practicing the method as thus described the sealing of the open top of the bag is accomplished . in the carton as shown in Figures 11 and 12 by the sealing means 101.
When the bags are le~t open at the top until deposited . into the carton there is provided as heretofore mentioned,.sealing I 3o means 101 for sealing the open ends, means 107 for folding the sealed ends into the carton and means for closing the end and side closure flaps of the carton~ Flgures 11 and 12. Referring .~13();~ ~
f~"'- 11 ~7Z~37 to Figures 11 and 12, as a carton with a bag in it is moved by the conveyor 24 away from the lower end of the forming and filling apparatus to the right as shown in Figure 12, l;he front and back closure flaps are spread apart by spaced parallel folding rails 5 ~ 111. The sealing means 101 comprise Ja~S 11.3-113 similar to thosedisclosed in Figures 5 and 6 arranged to reciprocate in a horizontal plane above the top line of the containers moving along on the conveyor. The open tops of the bags Will be moved between the separated jaws and at the right time a detector in the form of a photo cell PC causes the jaws to be closed on the upwardly projecting top of the bag to seal the top. As the Jaws come together they push the end wall closure flaps apart and to hold the leading closure flap displaced downwardly, when the ~aws are retracted, there is provided a pneumatic plunger 115 which is - 15 depressed into engagement with the leading flap, as shown in : Figure 12, to a nearly horizontal position so.that as the carton continues to be moved along the leading closure flap it will be ¦engaged with the underside of spaced rails 117-117 and be held ¦do~n. A folding blade 119 having an inclined edge 121, supported 20 jabove the line of travel of the upper ends of the carton provides for folding the up~lardly projecting sealed top of` the bag over so as to lie flat within the open top of the carton. Simultaneously adhesive is applied to the lower side of the closure flap at the back of the carton by means comprising a pair of rollers 123a~ 123k 25 ~nd a p-ot 125 which supplies adhesive -to the lower one of the rolls 123a- Beyond the folding and adhesive applying means there iS means 127 for engaging the underside of the leading f`lap to cause it to be folded back and down over the top of the carton.
~t this point the forward end of the carton intercept5 another 3o ~hoto cell P~C~alld a one revolut~on clutch 131 actuated by a , ~ . I
J lJ'~I
1~37~37 solenoid moves a hook 133 under the trailing closure flap and folds it forwardly and down over the open l;op of the car~on so ~¦that both the leading ~lap and the trailj.ng flap now move under la rail 135. ~urther movement of the carton bri.ngs the front and back closure flaps into engagement with spaced folding rails 137-137 which operate to first f`old the adhesive coated back closure flap i.nwardly over the end flaps and then the front closure flap onto the upper adhesive coated side of the back closure flap.
¦ As thus related, the method and apparatus described above 10 ¦provides for packaging particulate material in such a way as to ¦make use of the maximum capacity of the bag with minimum ¦dimensions and to introduce the bag into the carton easily with a close fit all around, that is, transversely and ~rom top to bottom which will afford the appearance of a completely filled carton which is highly desirable to insure complete customer acceptance.
¦ During a single cycle of operation a bag is formed above ¦¦the sealing jaws, ^losed at its lower end and open at its upper ¦¦end, and a bag is formed below the sealing jaws which is closed 20 ¦¦ at its lower end and may be closed or open at its upper end. The filling operation takes place while the sealing jaws are closed ¦ and the severing takes place a~ter the sealing operation. Followlng filling the sealing Jaws and severing blades are retracted, the released bag allowed to drop into the carton therebelow and the filled bag lowered for sealing and severing of the succeeding bag.
Vibration of the bag is effected whlle the bag is traveling downwardl~ from the sealing jaws. If the top of the bag is left open then the top ls sealed whlle in the carton as the latter is moving away from the ~andrel and the closure flaps are folded -14-.
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~ L3~ 1 over the tops of the cartons. These operatlons are timed to provide repeated cycles so long as the operation is to be carried ¦
on by klnematlc means controlled by limit switches or pre-punched tapes.
It should be understood that the presen~ disclosure is for the purpose of lllustration only and includes all ~odifications or lmp vement: which fall withln the scope o~ th- appende~ claims.
From a further aspect, the invention provides apparatus for forming, filling and inserting filled bags into cartons comprising, a hollow vertical-ly disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon in tubular fo~m from the lower end of the mandrel, said lower end of the mandrel corresponding substantially in cross section to the inside cross section of the carton within which the bag is to be inserted, a carton support, means for moving the carton support to advance cartons in succession below the mandrel, means at the lower end of the mandrel for at times forming a seal transversely of the tube to form a bag length above the seal closed at its bottom and open at its top for receiv-ing the material to be pac~aged, means for supplying material through the mandrel into the bag length to completely fill the same, means for severing the bag during the formation of the seal, means for releasing the closed bottom of the bag for movement downwardly toward the top of a carton on the support and means situated between the sealing means and the carton having a hollow cross section corresponding substantially to the cross section of the carton through which the filled bag is guided into the open end of the carton.
From yet another aspect, the invention provides apparatus for form-ing, filling and inserting filled bags into cartons comprising a hollow vertically disposed forming mandrel and therebelow successively sealing means and a carton support, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon, said mandrel having a lower end corresponding substantially in cross section to the inside cross section of the carton, means for at times sealing the tube transversely and releasing it to form a bag length above the seal and a bag length below the seal, said means being operable to maintain the seal Eor a predetermined length of time such as to consummate the seal, means for supplying material through the mandrel completely fill the bag length above the sPal during said predeter-mined time, opposed channel-shaped guide members situated between the sealing means and ~he top of the carton resting on the support which collectively ~''î'l .1 -3-~7~437 define a vertical p~ssage corresponding in cross section to the inside of the carton through which the filled bag is caused to descen~ into the carton, means on the guide members for engagement with the top of the carton resting on the support to hold the top of the carton in registration with the guide -members during deposit of the bag and means for raising and lowering the guide members following each deposit of the bags to permit a filled carton to be removed and an empty carton to be positioned for insertion of a bag.
In the disclosed embodiment, lowering of the filled bag downwardly on the mandrel is effected by oppositely-disposed endless belts, portions of which run parallel to the opposite sides of ~he mandrel. l`he means for at times forming seals transversely of the tube comprise sealing jaws having opposed faces between which the sides of the tube are pressed to form a seal and upwardly-facing flat surfaces for supporting the bottom of a bag at opposite sides of the seal during filling. The sealing jaws are maintained in sealing relation to the tube for a predetermined time sufficient to effect consummation of the seal. The suspended bag is severed by cutting blades operable in conjunction with the sealing means to sever the tube within the area of the seal to form a filled bag closed at the bottom and at the top, or to sever the tube below the seal to form a bag closed at the bottom and open at the top. The mandrel corresponds in cross section to the cross section of the container and serves to hold the tube expanded to the cross section of the carton and the sides of the filled bag are constrained to the cross sec-tion of the carton as it moves downwardly into the open top of the carton by opposed channel-shaped guide members situated between the sealing means and the top of the carton resting on the support which collectively define a vertical passage corresponding in cross section to the inside of the carton.
There is means on the guide members for engagement w~th the top of the carton to hold the top of the carton in registration with the guide member during deposit of the filled bag and means for raising and lowering the guide members following the deposit of the bag to permit a filled carton to be moved and an empty carton to be positioned for insertion of a bag. The support is desir-ably in the form of a conveyor provided with a horizontal run for moving ..
~ _4_ ~07~
empty cartons into pos:ltlon for loa~ing of bags thereinto and discharging the filled cartons from the place of loading. There is also means for effecting vi~ration of the channel shaped guide members and, optionally, means for effecting vibration of the cartons following deposit of the bags therein by effecting vibration of the conveyor. Finally, there is means opera~le after the loaded cartons leave the place of loading for sealing the tops of the open-top bags, applying adhesive to the closure flaps and folding them in engagement over the top of the carton.
The invention will now be described in greater detail and by way of example only, with reference to the accompanying drawings, wherein:
Figure 1 is a front elevation of a vertical forming and filling machine according to this invention;
1 Figure 2 is a side elevation as seen from the right side of Figure Figure 3 is an enlarged fragmentary front elevation of the machine showing the means for guiding the filled bags into the cartons;
-~a-f- ~ ~[)7Z~3~ 1 FIGURE 4 is a side view of FIGURE 3 as seen from the rlght side thereof;
FIGU~E 5 is a partial elevation from the right side of the l apparatus as shown in FIGURE 1, showing the seal.ing and severing 5 ¦ means in section and the bbttom of a bag before it is flattened by . ¦ the weight of the material being deposited therein;
FIGURE 6 is a view similar in part to FIGURE 5, showing the bottom of the bag flattened and supported by the upwardly facing ¦ surfaces of the sealing ~aws and the showing in elevation of the 10 1 guiding means for introducing the bag into the carton;
` I FIGURE 6A is a section similar to FIGURE 5 showing the sealing jaws cut away below the cutting blades;
FIGURE 7 is a view taken on the line 7-7 of FIGURES 5 and 6;
¦ FIGURE 8 is a horizontal section taken on the line 8-8 of 15 1 FIGURE 6;
FIGURE 9 is a front elevation taken on the line 9-9 of ¦ FIGURE 6;
FIGURE 10 is a plan view taken on the line 10-10 of FIGURE i l FIGURE 11 is a plan view taken on the line 11-11 of FIGURE
20 1 12;
FIGUR~ 12 is an elevation of FIGURE 11, and FIGURE 13`is a fragmentary view taken on the line 13-13 of FIGURE 12.
l Referring to the drawings, Figures 1 and 2, the apparatus 25 ¦ f this invention is a vertic~l type forming and filling machine . ¦ comprising a base frame 10 on which there is supported vertlcally a hollow forming and filling mandrel 12 to which there is supplied flexible sheet material 14 for forming into a c~ntinuous.tube on ¦the mandrel and above whlch there is supported a hopper 16 for 3o ¦supplying the material to be packaged. At the lower end of the ¦mandrel there ls means 18 for moving the formed tube downwardly ~ . . . . .. . , _ . , . . . _ . , 7;2~37 thereon and sealing and severing mean~s 20a, 20b for forming the tube lnto bag lengths and separating the lengths into separate bags. A side seam sealing element 19 is mounted axially o~ the mandr~ for continuously forming a side seam. ~11 of this structure is conventional and shown in one or more of the patents referred to above.
It is customary after forming and fill~ng the bags on a machine of this type to drop them on to a receiver and to deliver them from the receiver by a conveyor or the like to a place of cartoning if the bags are to be placed within cartons.
Due to the fact that the particulate material tends to settle at the bottoms of the bags and the bags are not shape retaining it becomes difficult to insert them into the cartons within which they are to be packaged. In one instance, as shown in patent 3,314,210 this difficulty was sought to be overcome by only partially filling the bag as it was formed, dropping it directly into a carton supported below the forming and filling tube ~nd thereafter completing the filling operation. According to this invention the filling is completed and the filled bags inserted into the cartons in one operation. To achieve this the ~ollow mandrel 12 is formed at its lower end as shown in Figure~
l, 3 and 7 to have a cross section corresponding substantially to the inside cross section of the carton within which the bag is to le packaged. Since this carton is of rectangular cross section Ithe lower end of the mandrel is correspondingly rectangular in ross section. As thus formed, the sheet material delivered rom the lower end of the mandrel has a cross section corresponding ubstantially to the inside of the carton. If it should be ~esirable to employ a carton of other than rectangular cross sectlo ~' l ',13~
f`' ~1 .
7Z~37 the lower end of then~l~el will be made of corresponding cross section so as to rorm the tube as it leaves the lower end of -the man~el to the cross section of the carton. Delivery of the shaped side seamed tubular material from the lower end of the mandrel is ef~ected by means of driven belts 22-22, Figure 3, supported at opposite sides of the mandrel.
The cartons C into which the filled bags are to be inserted are supported below the mandrel on conveyor means 24, Figures 3, 11 and 12, which delivers the cartons one at a time below the mandrel in timed relation with the filling operation and in accordance with this invention in order to guide the filled ba~ smoothly into the open topsof the cartons there is provided guide means comprising a pair of opposed channel members 26-26, Flgures 3, 6, and 8, which are supported below the sealing and severing means and above the open tops of the cartons resting on the conveyor 24 therebelow. Each channel member 26 has a side wall 28 and right angularly disposed front and back walls 30-30 for engagement with the sides of the formed bags and the front and back walls. In conjunction, as shown in Figure 8~ they provid~
an opening corresponding substantially in cross section to the lower end of the mandrel so as to receive a filled bag as the latter is lowered toward the open top of the carton for guiding it into the open top of the carton and for simultaneously prevent-ing the slde walls from bulglng, in other words, preserving the cross sectional shape of the bag as it is delivered from the mandrel. The upper ends of the channels are provided with the flaring lips 29, Figures 3 and 6, to insure admission of the ~bags.
~-- __ _ . .. __. ___ __ . _ _ . _ __ _.. .. ... _ _,_ _ , _ r ~ ,~ __ j L ,) v ~:.
r-l ~L~7Z~37 The guide means comprising the channel~ 26-26 are supported for movement up and down relative to the conveyor 24 and there is provide~ means :~or movement therewith to enter the open top of the carton t-o hold the end and sLde closure flaps erect. ITo provide for such movement t~e channels are mounted between the forward ends of a pair of transversely spaced arms 31-31, Figures 6 and 10, fixed at their rear ends on a horizontal shaft 32, the latter being mounted at its opposite ends on bracket members 34-34. The bracket members, Figure 9, contain vertical slots 38-38 for receiving attaching bolts 42 by , means of which the height of the guiding means may be ad~usted.
A pneumatic cylinder 44 is mounted on a bracket 46 below the guiding means from which projects upwardly a rod 48 and this is pivotally connected by a yoke 50 to an arm 52~ the upper end of which is forked for receiving the ends of ~ shaft 54 fixed to the forward end of an arm 55. The rear end of the arm 55 is fixed to the shaft 32. Coiled springs 56-56 connected at one end to the shaft 54 and at thelr opposite ends to a rod 58 secured to the bracket 46 operate to normally pull the arm 55 downwardly to a horizontal position as shown in Figure 8. Pressure supplie to the cylinder 44 will move the arm 55 upwardly ~o in turn move : the channel members upwardly to clear the upper ends of cartons being moved into position below them.
The means for holding the end and the side closure flaps ereCt comprlse downwardly extending parts 62-62 and 64 64. The parts 62-62 comprise vertical extensions of the end walls 28~28 ,. and have beveled corner portions 66-66 so that as the channels are moved downwardly the beveled porti.ons enter between the front and l back closure flaps and cam them apark. The parts 64-64 are relat~vely narrow plates pivotally suppor~don horizontally ':~
_~_ ~
J.
107'~4~37 disposed spindle~ 67-67, the latter being fixed to bracket plates 68-68 bolted to end walls 28-28 o~ the channel member~. Springs 70-70 on the spindles anchored at one end 72 to the bracket plates 68-68 and at their other ends to the parts 64-64 bias the plates inwardly t~ward each other as illustrated in dotted lines in Figure 9 when the channel members are raised to their upper positions. As the channel members are lowered the upper ends of these parts are engaged by abutments 76-76 fixed to angle members 77-77 and caused to be displaced outwardly to the full line positions shown in Figure 9 to force the end closure ~laps outwardly to vertical positions. The angle members contain slots 79-79 for receiving bolts 81-81 by means of which they are adjustably mounted to the brackets 34 34.
The sealing means 20a in one form, as illustrated herein, Figures 5 and 6, comprises a pair of opposed jaws 100-100 support ~or horizontal reciprocation toward and frorn each other whlch have vertically disposed flat faces 102-102 for engagement with the front and back sides of the tube to press them together to seal a narrow length of the tube as shown in Figure 5, extending from top to bottom of the faces of the jaws. For the purpose of seal-ing, the jaws are heated although it should be understood that it is within the scope of the invention to employ self-sealing material which when pressed together will form a permanent seal.
The jaws have a vertical depth which is sufficient to form a seal d area which is adapted to be severed intermediate its upper and lower boundaries to form a seal at the lower end of the bag above the jaws and a seal at the upper end of the bag below the jaws.
The severing means 20b comprises cut-ting blades 104-104 which are recessed into the jaws 100-100 for horizontal movemenk, after the jaws are brought together, to cut khrough the sealed area .
,,~ , _g_ i 1 ~7Z43~ .
Il jlWhen a structure of this kind is employed, as soon as the Jaws ¦¦are retracted,the bag at the lower side of the ~aws is released whereupon it gravitationally descends throu~h the guiding means land into the carton.
¦ It may be desirable under certain circumstances to leave ¦the top of the bag below the jaws open until it is deposited in-¦the carton and if thisis the case the lower portions of the jaws 100-100 below the cutting blades 104-10~ are beveled as shown in Figure 6a so that the seal takes place only above the cutting blades. The tube below the cutting blades is not sealed and so the bag length formed by severing the tube remains open at the top and will drop downwardly through the guiding means into the carton. When operating in this fashion there is provided means 101 as shown in Figures 11 and 12 for sealing the upper open ends of the bags while within the cartons after the latter are moved away from the lower end of the mandrel by the conveyor 24.
A problem which has been troublesome with prior forming and filling apparatus of this kind has been that the weight of the material deposited in the bags, particularly if the ~laterial is relatively heavy, bursts the bottom seam of the bag before the seam becomes firm and so in accordance with this invention the sealing jaws 100-100 are provided at their upper sides, Flgures 5 ànd 6, with flat supporting surfaces 78-78 upon which the lower end of the bag at each side of the seam is adapted to rest during the filling operation. Figure 5 shows the shape of the lower end of the bag before it is filled and also the shape it would have if the material ~ras very light weight. A heavy material will depress the bottom into engagement with the surfaces 78-78. The operation of the apparatus is designed to hold the sealing ~aws 3o 100-100 engaged with the bottom seam unt.i.l the bag is completely .~ -10_ , l 31302 ~7~7 filled and f`or a sufficient length of time to perfect the seal by allowing it to become set before the sealing ~aws are retracted to permit the bag to be dropped down for deposit into the carton i therebelow. An additional advantage is achieved by this means in !. 5 that thle supporting surfaces 78-78 contribute to forming a bag :~` the entire length of which is substantlally of uniform cross section. This pr~vides for a maximum fill volume and minimum bag length even when the botto~ seal is of the pillow sllp type. It is~ of course, within the scope of the invention to have a gusset type bottom and for this purpose there are provided tucking member 80-80, Figure 3, of conventional construction which~are arranged to move horizontally inwardly over the top of the sealing ~aws ; and below the lower end of the forming mandrel. If a pillow slip . type of seal is to be made the tucking members are withheld from ?~ 15 opèration. There are also tucking membersl~82-82 below the sealing , and severing means which are correspondingly moved inwardly with the upper tucking members to form tucks at the upper ends of the bags if desired.
As previously related, the guiding means comprising the channel members 26-26 are arranged to maintain the cross section of the bag as it descends from the mandrel toward~the top of the ¦carton in substantially the configuration and cross section of the carton. It is sometimes found advantageous to insure symmetry of .~ the cross section of the package and uniformity o~ diskribution of the material in the bag ~rom top to boktom to vibrate the bag ' either while it is being guided downwardly into the carton or : fter is is deposited in the carton. For the purpose of vibrating ~ the bag while it ls being guided downwardly into the carton there 1 is provided, ~s shown in Figures 6, 9 and 10, eccentrics 84-84 3o fixed to a horizontal sha~t 86. The eccentrics 84-84 bear against f'- :~7~2437 hardened plates ~ secure(l t;o the undersides of the arms 31-31 so that rotation of the eccentrlcs rapidly raises and lowers the arms a very slight amount. The sha~t 86 is rotated by means of a pulley 80a, Figure 2, fastenec1 to it about which is entrained one end of a belt 92 The opposite end of the belt 92 is entrained about a pulley 94 on the drive shaft 96 of a motor 98.
Instea~ o~ effecting vibration of the channel members as thus described, it is within the scope of the invention to effect vibration of the cartons while resting on the conveyor 24 by means of eccentrics 91 supported in engagement with the underside of the conveyor 24, Figures 12 and 13. The eccentrics 91 are fixed to shafts 93 to which are fixed sprockets 93a about which are en-trained a chain 93b One of the shafts, 93 is connected by beveled gears 95,97, a shaft 99 and beveled gears 103 and 105 to the shaft 86.
In accordance with the method of operation of this . apparatus when packaging lightweight bulky material which does not settle very well into the bag during the bag filling operation the bag is f-illed to a higher level than the depth o~ the carton, the over-fi].led bag is severed from the succeeding bag and vibrate either by the guide means or when deposited in the carton resting on the conveyor as related above to cause the bulky material to settle sufficiently so that the vertical height of the bag does not exceed that of the carton. When practicing the method as thus described the sealing of the open top of the bag is accomplished . in the carton as shown in Figures 11 and 12 by the sealing means 101.
When the bags are le~t open at the top until deposited . into the carton there is provided as heretofore mentioned,.sealing I 3o means 101 for sealing the open ends, means 107 for folding the sealed ends into the carton and means for closing the end and side closure flaps of the carton~ Flgures 11 and 12. Referring .~13();~ ~
f~"'- 11 ~7Z~37 to Figures 11 and 12, as a carton with a bag in it is moved by the conveyor 24 away from the lower end of the forming and filling apparatus to the right as shown in Figure 12, l;he front and back closure flaps are spread apart by spaced parallel folding rails 5 ~ 111. The sealing means 101 comprise Ja~S 11.3-113 similar to thosedisclosed in Figures 5 and 6 arranged to reciprocate in a horizontal plane above the top line of the containers moving along on the conveyor. The open tops of the bags Will be moved between the separated jaws and at the right time a detector in the form of a photo cell PC causes the jaws to be closed on the upwardly projecting top of the bag to seal the top. As the Jaws come together they push the end wall closure flaps apart and to hold the leading closure flap displaced downwardly, when the ~aws are retracted, there is provided a pneumatic plunger 115 which is - 15 depressed into engagement with the leading flap, as shown in : Figure 12, to a nearly horizontal position so.that as the carton continues to be moved along the leading closure flap it will be ¦engaged with the underside of spaced rails 117-117 and be held ¦do~n. A folding blade 119 having an inclined edge 121, supported 20 jabove the line of travel of the upper ends of the carton provides for folding the up~lardly projecting sealed top of` the bag over so as to lie flat within the open top of the carton. Simultaneously adhesive is applied to the lower side of the closure flap at the back of the carton by means comprising a pair of rollers 123a~ 123k 25 ~nd a p-ot 125 which supplies adhesive -to the lower one of the rolls 123a- Beyond the folding and adhesive applying means there iS means 127 for engaging the underside of the leading f`lap to cause it to be folded back and down over the top of the carton.
~t this point the forward end of the carton intercept5 another 3o ~hoto cell P~C~alld a one revolut~on clutch 131 actuated by a , ~ . I
J lJ'~I
1~37~37 solenoid moves a hook 133 under the trailing closure flap and folds it forwardly and down over the open l;op of the car~on so ~¦that both the leading ~lap and the trailj.ng flap now move under la rail 135. ~urther movement of the carton bri.ngs the front and back closure flaps into engagement with spaced folding rails 137-137 which operate to first f`old the adhesive coated back closure flap i.nwardly over the end flaps and then the front closure flap onto the upper adhesive coated side of the back closure flap.
¦ As thus related, the method and apparatus described above 10 ¦provides for packaging particulate material in such a way as to ¦make use of the maximum capacity of the bag with minimum ¦dimensions and to introduce the bag into the carton easily with a close fit all around, that is, transversely and ~rom top to bottom which will afford the appearance of a completely filled carton which is highly desirable to insure complete customer acceptance.
¦ During a single cycle of operation a bag is formed above ¦¦the sealing jaws, ^losed at its lower end and open at its upper ¦¦end, and a bag is formed below the sealing jaws which is closed 20 ¦¦ at its lower end and may be closed or open at its upper end. The filling operation takes place while the sealing jaws are closed ¦ and the severing takes place a~ter the sealing operation. Followlng filling the sealing Jaws and severing blades are retracted, the released bag allowed to drop into the carton therebelow and the filled bag lowered for sealing and severing of the succeeding bag.
Vibration of the bag is effected whlle the bag is traveling downwardl~ from the sealing jaws. If the top of the bag is left open then the top ls sealed whlle in the carton as the latter is moving away from the ~andrel and the closure flaps are folded -14-.
~, . . . .. ... .. _. _ .. ..
~ 1 , ~i L
~ L3~ 1 over the tops of the cartons. These operatlons are timed to provide repeated cycles so long as the operation is to be carried ¦
on by klnematlc means controlled by limit switches or pre-punched tapes.
It should be understood that the presen~ disclosure is for the purpose of lllustration only and includes all ~odifications or lmp vement: which fall withln the scope o~ th- appende~ claims.
Claims (14)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertically disposed forming mandrel on which sheet material is formed into a continuous tube, said forming mandrel having a lower end corresponding in cross section to the inside cross section of the carton within which the bag is to be deposited, a support below the mandrel for supporting a carton standing upright thereon, sealing means located between the lower end of the mandrel and the carton support operable at times to seal the tube transversely to form a bag length above the seal, means for supplying material through the mandrel into the bag length to completely fill the same while the sealing means remains in seal forming relation, said mandrel serving to confine the bag to the cross section of the container during filling, means below the sealing means defining a vertical passage extending from the lower side of the sealing means down to the open top of the carton therebelow thru which the filled bag is adapted to descend into the open top of the carton, said means constraining the bag to the cross section of the carton throughout the downward movement of the bag, means for lowering the filled bag thru said last named means into the open top of the carton to a position such that the lower end of the bag enters the open top of the carton while still confined within said means and before it is severed from the succeeding tube and means for severing the suspended bag from the succeeding tube so that it drops gravitationally thru said means to the bottom of the carton.
2. Apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertically disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon in tubular form from the lower end of the mandrel, means for moving empty carton to a position below the mandrel and from thence away from the lower end of the mandrel, means for at times sealing the tube transversely to form a bag length extending from the mandrel down to the sealing means adapted to be filled through the mandrel, means for completely filling the bag, said mandrel corresponding in cross section to the cartons and serving to confine the bag to the cross section of the cartons during filling, means for releas-ing the filled bag and moving it downwardly toward the carton support, and means situated below the sealing means for constraining the sides of the filled bag to a cross section of the carton as it moves downwardly into the open top of the carton, said means extending substantially continuously from the sealing means onto the open top of the carton so that the filled bag is constrained to the cross section of the carton throughout its movement from the lower end of the mandrel into the open end of the carton.
3. Apparatus according to claim 2, comprising means for effecting vibration of the means for constraining the bags during movement into the carton.
4. Apparatus according to claim 2, comprising means on the carton support for effecting vibration of the carton following deposit of the bag therein.
5. Apparatus according to claim 2, comprising means for severing the filled bag from the succeeding bag, and means supported above the carton support at the level of the tops of the cartons and in the direction of move-ment of the carton support for sealing the tops of the bags while in the cartons.
6. Apparatus according to claim 2, comprising means for severing the filled bag from the succeeding bag while the latter is being filled, means at the far side of the mandrel with respect to the movement of the container support relative thereto for folding the closure flaps outwardly, sealing the top of the bag in the carton and then folding the closure flaps inwardly over the top.
7. Apparatus according to claim 2, comprising means at the far side of the mandrel with respect to movement of the carton support relative there-to comprising folding rails for folding the front and back closure flaps outwardly, reciprocal sealing jaws for sealing the top of the bag above the top of the carton, said sealing jaws carrying means for folding the end closure flaps outwardly, a folding rail for folding the seal at the top of the bag over into the carton and means for thereafter folding the closure flaps into engagement over the top of the carton.
8. Apparatus according to claim 7, comprising means for applying adhesive to the outer side of the back closure flap before it is closed inwardly.
9. Apparatus for forming, filling and inserting filled bags into cartons comprising, a hollow vertically disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon in tubular form from the lower end of the mandrel, said lower end of the mandrel corresponding substantially in cross section to the inside cross section of the carton within which the bag is to be inserted, a carton support means for moving the carton support to advance cartons in succession below the mandrel, means at the lower end of the mandrel for at times forming a seal transversely of the tube to form a bag length above the seal closed at its bottom and open at its top for receiving the material to be packaged, means for supplying material through the mandrel into the bag length to com-pletely fill the same, means for severing the bag during the formation of the seal, means for releasing the closed bottom of the bag for movement downwardly toward the top of a carton on the support and means situated between the seal-ing means and the carton having a hollow cross section corresponding sub-stantially to the cross section of the carton through which the filled bag is guided into the open end of the carton.
10. Apparatus for forming, filling and inserting filled bags into containers, comprising a hollow vertically disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downward-ly thereon over the end, said mandrel having at its lower end a cross section which corresponds substantially to that of the inside cross section of the carton into which the bag is to be inserted, means for at time forming seals transversely of the tube to form a bag length above the seal and a bag length below the seal comprising sealing jaws having opposed faces between which the sides of the tube are pressed to form a seal and upwardly facing flat sur-faces for supporting the bottom of the bag at opposite sides of the seal dur-ing filling, means for maintaining the seal means in sealing relation to the tube for a predetermined time sufficient to effect consummation of the seal, means for supplying material through the mandrel to completely fill the bag length above the seal during said predetermined time, means for moving the carton support to position the carton below the mandrel, means for severing the tube transversely to separate the bag above the sealing means from the bag below the sealing means, comprising cutting blades which sever the tube within the boundaries of the sealed area, means for releasing the sealing means following said predetermined time and forming means for shaping the bag to the cross section of the carton and guiding it downwardly into the carton.
11. Apparatus according to claim 10, wherein the cutting blades are designed to cut through the tube below the lower boundary of the sealed area.
12. Apparatus for forming, filling and inserting filled bags into cartons comprising a hollow vertically disposed forming mandrel and there-below successively sealing means and a carton support, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon, said mandrel having a lower end corresponding substantially in cross section to the inside cross section of the carton, means for at times sealing the tube transversely and releasing it to form a bag length above the seal and a bag length below the seal, said means being operable to maintain the seal for a predetermined length of time such as to consummate the seal, means for supplying material through the mandrel completely fill the bag length above the seal during said predetermined time, opposed channel-shaped guide members situated between the sealing means and the top of the carton resting on the support which collectively define a vertical passage corresponding in cross section to the inside of the carton through which the filled bag is caused to descend into the carton, means on the guide members for engagement with the top of the carton resting on the support to hold the top of the carton in registration with the guide members during deposit of the bag and means for raising and lowering the guide members following each deposit of the bags to permit a filled carton to be removed and an empty carton to be positioned for insertion of a bag.
13. Apparatus for forming, filling and inserting filled bags into cartons, comprising a hollow vertically disposed forming mandrel, means for forming sheet material into a tube on the mandrel and moving it downwardly thereon in tubular form from the lower end of the mandrel, means for moving empty cartons to a position below the mandrel and from thence away from the lower end of the mandrel, means for at times sealing the tubes transversely to form a bag length, extending from the mandrel down to the sealing means, adapted to be completely filled through the mandrel and for simultaneously severing the tube transversely below the seal to separate the bag above the sealing means from the hag below the sealing means, means for releasing the filled bag from the succeeding bag so that it moves downwardly towards the carton support, means situated below the sealing means for constraining the sides of the completely filled bag to a cross section corresponding to that of the mandrel as it moves downwardly into the carton said means extending from the sealing means to the open top of the carton so that the filled bag is constrained throughout its movement from the lower end of the mandrel into the open top of the carton, means supported above the carton support at the level of the tops of the cartons and in the direction of movement of the carton support for sealing the tops of the bags while in the cartons and means for then closing the end and side closure flaps of the cartons.
14. Apparatus according to claim 1 comprising means for supporting the lower end of the bag above the sealing means at each side of the seal while the sealing means remains in sealing engagement with the bag and during filling of the bag.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA258,583A CA1072437A (en) | 1976-08-06 | 1976-08-06 | Bag in box |
| CA339,386A CA1091142A (en) | 1976-08-06 | 1979-11-07 | Method of forming, filling and inserting filled bags into cartons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA258,583A CA1072437A (en) | 1976-08-06 | 1976-08-06 | Bag in box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1072437A true CA1072437A (en) | 1980-02-26 |
Family
ID=4106599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA258,583A Expired CA1072437A (en) | 1976-08-06 | 1976-08-06 | Bag in box |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1072437A (en) |
-
1976
- 1976-08-06 CA CA258,583A patent/CA1072437A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |