US2625778A - Machine for closing cartons while the cartons are being translated - Google Patents

Machine for closing cartons while the cartons are being translated Download PDF

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US2625778A
US2625778A US227347A US22734751A US2625778A US 2625778 A US2625778 A US 2625778A US 227347 A US227347 A US 227347A US 22734751 A US22734751 A US 22734751A US 2625778 A US2625778 A US 2625778A
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cover
flap
carton
cartons
folding
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US227347A
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Wayne A Wood
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SUTHERLAND PAPER Co
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SUTHERLAND PAPER CO
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00Closing containers or receptacles after filling
    • B65B7/16Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/20Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by folding-down preformed flaps
    • B65B7/24Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by folding-down preformed flaps and interengaging tongue and slot closures

Description

Jan. 20, 1953 w. A. woon 2,525,778

MACHINE FOR CLOSING CARTON-S WHILE THE CARTONS ARE BEING TRANSLATED IN V EN TOR.

Jan. 20, 1953 2,625,778

W. A. WOOD MACHINE FOR CLOSING CARTONS WHILE THE CARTONS ARE BEING TRANSLATED Filed May 21, 1951 4 Sheets-Sheet 2 4 Sheets-Sheet 5 Jan. 20, 1953 Filed May 2l,` 1951 W. A. WOO MACHINE FOR CLOSING CARTONS WHILE THE CARTONS ARE BEING TRANSLATED INVENTOR.

Kay/7@ Mad Jan. 20, 1953 w. A. woon 2,625,778

A MACHINE FOR CLOSING CARTONS WHILE THE CARTONS ARE BEING TRANSLATED Filed May 21, 1951 4 sheets-sheet 4 Patented Jan. 20, 1953 MACHINE FOR CLOSING CARTONS WHILE THE CARTONS ARE BEING TRANSLATED Wayne A. Wood, Kalamazoo, Mich., assignor to Sutherland Paper Company, Kalamazoo, Mich.

Application May 21, 1951, Serial No. 227,347

Claims.

This invention relates to improvements in machine for closing paper cartons while the cartons are being translated.

The principal objects of this invention are:

First, to provide a ma-chine which will automatically fold in end flaps and close and lock the side folding cover of a rectangular paper carton while the carton is being continuously translated along a conveyor.

Second, to provide a machine for effectively folding the end flaps and side folding cover of a translated paper carton without unduly deforming the side and end Walls of the carton which may be relatively loosely interlocked.

Third, to provide novel means for folding the leading end flap of a translated carton over the carton while the carton is being moved.

Fourth, to provide means for folding the trailing end flap of a carton inwardly over the carton while the carton is being continuously moved.

Fifth, to provide means for accurately and sharply bending the side folding top of a carton over the carton and turning down a side flap on the swinging end of the cover while the carton is being translated.

Sixth, to provide means for inserting or engaging a tuck nap on the end ap of a cover into a locking slot in the side of a carton While ythe carton is being translated.

Other objects and advantages of my invention Will be apparent from a consideration of the following description and claims.

The drawings, of which there are four sheets, illustrate a preferred and highly practical form of my carton closing machine.

Fig. 1 is a plan view of the machine, the view being broken in two sections along the broken line with the lower portion constituting a continuation of the right end of the upper portion.

Fig. 2 is a fragmentary vertical longitudinal cross sectional view through the end flap folding portion of the machine taken along the plane of line 2-2 in Fig. l.

Fig. 3 is a fragmentary perspective View partially in vertical section illustrating the operation `of the leading flap folding mechanism.

Fig. 4 is an enlarged vertical cross sectional view illustrating the trailing flap folding mechanism shown in'Fig. 2 in another position of the mechanism.

Fig. 5 is a fragmentary transverse vertical cross sectional View through the cover-folding portion of the machine taken along the plane of the line .5-5 in Fig. 1.

Fig. 6 -is a fragmentary transverse cross sectional view similar to Fig. 5' but illustrating the cover flap folding mechanism in an advanced stage of the cycle of the machine.

Fig. 7 is a fragmentary plan view of a closed carton after it has passed the cover flap folding portion of the machine.

Fig. 8 is a horizontal plan view partially in section of the tuck flap inserting portion of the machine.

Fig. 9 is a side elevational view of the carton With the tuck flap and tuck flap locking slot positioned to be operated on by the ilap deflecting pin and flap inserting cam wheel of the machine, the pin being shown in cross section along the plane of the line 9--9 in Fig. 10.

Fig. 10- is a fragmentary transverse vertical cross sectional view through the tuck flap inserting mechanism taken along the plane of the line lf3-lil in Fig. 9.

Fig. 1l is a fragmentary vertical longitudinal cross sectional view through a carton positioned opposite the tuck ap inserting mechanism and showing the iiap inserting cam in elevation.

My present machine is designed to automatically close paper cartons of relatively light weight after they have been previously erected and filled with the contents which they are to carry. The machine is particularly designed to operate on inexpensive -cartons having end walls that are joined to the side walls by inexpensive and automatically erectible interlocking flaps so that the cartons are not rigid in the sense .that cartons having glued and integrally connected side and end walls are rigid. The cartons on which my machine is designed to operate are designed to inexpensivelyv package and protect consumer items such as baked goods and it is therefore essential that the cost' of the carton and the cost of erecting and closing it be held to a minimum.

As is generally illustrated in Fig. 1 my machine includes a conveyor way I along which cartons are adapted to be continuously translated by the ights 2 of a continuously driven conveyor chain 3. The cartons 4 are delivered transversely to the conveyor way from a carton set-up machine indicated generally at 5 and it will be understood that the set-up machine 5 which forms no part of the present invention functions to set up the cartons from fiat blanks so that the side and end Walls of the cartons are erected and interlocked and interconnected by a combination of interlocking corner flaps and slots. The cover of the carton extends verticallyfrom one side wall as the carton'is delivered from the set-up machine.

After leaving the set-up machine the cartons 4 are introduced into the conveyor way by a crank operated pusher mechanism 3. In order to synchronize the operation of the several elements of my machine, a chain 'l driven in timed relationship to the set-up machine is connected through the shafts and gears 8 to operate the chain 9 which drives my carton closing mechanism in a manner to be described presently.

The carton closing mechanism includes a leading end ap folder generally indicated at I0, a trailing end flap folder generally indicated at i i, a cover bending guide bar |2,"'a cover Aflap folder generally indicated at I3, and a -combi-ned cover closing and tuck ap inserting structure generally indicated at I4.

While various drive arrangements may be provided, I connect the chain 9 to a cross shaft I5 which is chain connected to drive the nleading flap folder shaft IS and the trailing flap folder shaft Il. The shaft I is also connected by the chain I3 to a cross 'shaft I9 and the shaft I9 is in turnv connected by the chain 29 to the shaft 2| for operating the conveyor chain 3. The shaft is connected 'by means of the chain 22 to the cover flap folding shaft 23 and a chain 24 connects the latter shaft to a shaft 25 for operating the tuck flap inserting mechanism.

Structural details of the supporting framework of the machine are largely omitted except where operating portions of the machine are connected thereto. It is believed that persons skilled in the art will be readily able to provide the necessary structural support for the elements to be described.

Leafzmg end flap folder As is best illustrated in Figs. 2 and "3, the cartons 4 are regularly and continuously advanced by the conveyor in the direction indicated by the arrows with their 'side walls 2-5 and end walls 2T erected. The-end walls are provided with leading end flaps y28 and trailing end fla'ps 219 'which project above the edges of the 'side walls. 'The end flaps 23 and 29 are connected to their respective end walls along scored'fold lines but in order to increase the rigidity ofthe finished carton the fold lines are not very deep so that considerable force is required to bend the end aps along the fold lines. n A

A disc 3D is mounted on vthe 'end 'of the shaft |6 alongside the path of movement of the 'cartons and the disc is provided with segmental arcuate fold .plates 3| which project across fthe path of travel of the cartons. 'It will be noted that the bottom of the ldisc 39 and the outer surfaces of the fold plates 3| are V"approxmate'l'y,level with,

er tangent to the top edges of the 'Si-de walls 2s ofthe cartons as they are translated 'below the folding plates 3|. rThe disc 3|) 'rotates the direction indicated by thearrows so that one of theY two folding plates will be lpresented in the path vofwe'ach.successivefcaxton as illustrated in Fig'. 2.V I'he shaft lwand the disc 3l) are rotated 'so that the peripheral Vspeed of the folding plates 3| is less than the lineal rate of advance of the conveyor 3 and cartons 4.

From a considerationo'f Fig. 2 it will be apparent that f the dise 33 and lower Y'fold plate 3| were held stationary the advancing motion of the cartera-4 esule-causante .icas externe 23 to' b' bent inwardly ov'rth by camn'ing action. However, sue fa cart-lining action alone applied to the relatively stiff flap would also tend to buckle 'the leading rend wall 2'1A inwardly Of th cttl l'd lsbly bk the 16058 connections between the end wall and the side walls. Such motion might also damage the contents of the carton. Accordingly, the trailing edges of the folding plates 3| are provided with radially projecting iianges 32 which hook over the free edge of the leading end flaps '28. Rotation of the disc 3Q causes the flange 32 to more downwardly as the end ap 28 folds, thus effectively preventing transverse bowing oi either the flap or the leading end wall. A hold-down plate or bar 33 supported from a bracket 35i on the 'side of the machine overlies the incoming "ton Vand prevents 'their 'accidental tilting niece; h

action of the fold plates 3|.

Trailing emi flap folder After the leading end flaps have been as described, the cartons are advanced past the shaft Il and a cam plate 35 flxedly supported UIC alongside of 'the conveyor. The cam plate 3s defines 'an irregular cam opening 355 through which the shaft |'l extends and the shaft il' carries a crank member 3l' having oppositely extending crank arms 38, lPivotallycarried at the er the 'arms 38 are transversely extending trai g flap folding plates 39 'which project transversely across Vthe conveyor to engage the 'trailing dans 29 of each successive carton. The plates 3: are rigidly connected to lcrank levers 43 a` l swinging ends of the levers t are provid th cam follower rollers 4|, which engage and travel along the surface of the carn opening 33 as the crank 3l is rotated. The crank levers #iii are spring urged into constant engagement with the "edge "of "the-foam opening 33 by springs 2 which extend from Vea'chcrank lever to pins 33 carried vby. -projections 'on the 'opposite crank arm A's is best illustrated liin Fig. "4, the edge of the cam opening A36 provided with a re-entrant lobe 44 which* forces the follower roller 4I of each lever linwardly of the cam opening as the leve'i approaches the bottom of itstravel. This movement of the roller :and its associated crank lever 4i) swings the lever to the position indicated `by the vdotted lines at l0-A in Fig. 4. The flap folding plate carried bythe y'crank lever is correspondingly swung to 'an elevated position indicated by the dotted lines at 39`A so that the incoming trailing end flap 29 will clear the folding plate as indicated at 2li-A. The crank member 31 is rotated at such a speed that the folding plate 39 is advanced faster than vthe trailing end ap '29 in an overtaking motion which tends to fold the trailing end flap 'inwardly over the rear end wal-l of ythe v carton. vS'irnl'iltaneously with the overtaking 'of the trai-ling flap 29, the follower roller '4| is permitted tov nove Aoutwardly after passing 'the cam lobe H4 Aso that the folding plate -39l assumes aho'iontal position just as the trailing wall of the carton 'passes under it. A ange or projection 45 on each of th folding plates 39 engages the swinging edge of each successive end flap and prevents inward buckling ofthe end wall during the inward folding of the end wall flap.

Cover will cocer flap folding mechanism After both the trailing and leading end wall aps of the cartons' have been Afolded inwardly as just described, the cartons are translated underneath a holel=dewn plate or `strip 43, which is 'supported intermediate of its ends by a laterally extending bracket 46 (see Figs; 1 and 5). This strip functions to hold the end flaps in folded condition while the cover is folded and locked.

It will be understood that throughout the folding of the end naps the cover 41 on the carton has been extended vertically from one side wall. As the carton is advanced, the upstanding'leading edge of the cover is engaged by the laterally and longitudinally inclined fold bar l2 to fold the cover transversely over the carton. The bar l2 brings the cover 41 into an acute angular, partially closed, position over the carton and against the top of a guide bar 48, which is supported by a bracket 48' from the conveyor side. Continued translation of the carton brings the folded inner edge of the cover under a crimping roll or wheel 49 which sharply crimps the fold between the cover and the side wall. During the crimping of the folded edge of the cover the swinging edge thereof is retained against the guide bar 48 by a horizontal reach 50 of the fold bar I2.

After the carton has passed the crimping roll 49 the swinging edge of the cover 41 with a cover flap portion 5I extending therefrom is brought into engagement with a cover flap folding roll 52 driven from the previously described shaft 23. The roll 52 has a cylindrical inner holding portion 53 cooperative with the guide bar 48 and an axially cammed flange 54 which is rotated in timed relationship with the advance of each carton to fold each cover flap sharply downwardly along the side of the guide bar 48.

Cover flap inserting and locking mechanism After the carton is translated past the cover flap folding mechanism the cover iiap is held in downwardly inclined position by a guide plate 55 (see Fig. 7) until the leading edge of the cover flap engages a cover ap closing wheel 56 which is driven by the shaft 25. The wheel 56 is lapped downwardly along the side of the carton and presses the carton snugly against the opposite side of the way I. The cover at this position is still in partially inclined incompletely closed position with the cover flap 5| lapped along the upper edge of the side wall of the carton. The wheel 56 carries an angularly adjustable closing cam 51 which rotates downwardly to force the cover into flat position across the top of the carton and the support plate 46.

The cover folding Wheel 56 also carries an angle shaped projection or bracket 58 on its outer side, which bracket serves to support the outer end of a pin element 59, as is most clearly illustrated in l Fig. 10. The inner end of the pin element 59 is journalled in the periphery of the wheel 56 to project therethrough and a coil spring 6D constantly urges the pin outwardly away from the inner face y of the wheel 56. The pin 59 is angularly positioned with respect to the closing cam 51 so that the pin is brought into overlapping or opposed relationship to the front wall of the carton prior to the closing cam reaching its fully closed position relative to the cover 41,

Fixedly mounted on the framework of the machine and opposite the path of travel of the pin 59 at its lowest point, is a fixed cam 6| which functions to press the pin 59 inwardly toward the carton as the pin is translated between the cam and the carton by the wheel 55. The inner end of the pin 59 is thus adapted to move transversely against a depending tuck flap 62 provided on the lower edge of the cover nap 5I,y Not only will the tuck flap 62'be pressed inwardly but a lock flap or portion 63 formed by slitting the side Wall of the carton as at 64, will also be pressing inwardly so that downward motion of the cover and cover flap under the influence of the cam 51 will cause the tuck flap to be pressed into the slot vacated by the lock flap.

After the cover 41 has been fully depressed, rotation of the wheel 56 moves the pin 59 away from the fixed cam 6l and permits the pin and cover flap to retract. The lock ap and the edge of the slot in the side wall of the carton will also spring outwardly to lockingly engage the tuck flap in a familiar type of locking engagement.

Continued translation of the filled and now closed cartons carries them beyond the end of the hold-down plate 46 and a crimping roll 65 is provided for finally pressing the cover firmly down against the top of the carton. This final downward motion of the cover also firmly seats the tuck flap in the locking slot 64, and the automatic closing of the carton is complete.

vHaving thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A machine for closing rectangular paper cartons having end wall naps and a cover hingedly connected to one side wall and a cover flap on the swinging edge of the cover with a tuck flap on the edge of the cover flap, as the cartons are continuously translated along a conveyor in an endwise position comprising, a leading end iiap folding device positionedalongside said conveyor and including a vertical disc tangent on its lower side to the plane of the top of said cartons, said disc having segmental arcuate folding plates secured to diametrically opposite sides thereof and projecting transversely across the path of travel of said cartons, means for rotating said disc at a peripheral speed less than the lineal speed of said cartons and in timed relation thereto to present each one of said plates in front of alternate incoming cartons, said folding plates having radially projecting ap engaging flanges on the trailing edges thereof, a trailing flap folding device positioned alongside said conveyor behind said leading flap folding device and including a fixed cam plate with an irregular cam opening therein, a shaft projecting through said opening, a double armed crank member on said shaft, crank levers pivotally carried on the swinging ends of said crank member and having cam follower rolls spring urged into engagement with ythe edge of said cam opening to control movement of the levers about their pivots, trailing flap folding plates connected to the pivots of. said crank levers for rotation thereby, said trailing flap folding plates extending transversely across the path of said cartons, means for rotating said shaft and the crank member and plates carried thereby at a peripheral speed greater than the lineal spead of said cartons and in timed relation thereto whereby each one of the plates overtakes and engages the trailing end flaps of alternate cartons, said trailing flap folding plates having flap edge engaging flanges on the swinging edges thereof, said cam opening having a reentrant portion arranged to swing said crank levers and said trailing flap folding plates to above a horizontal on the downward motion of each lever with said member to clear incoming iaps, and means positioned alongside and over said conveyor behind said trailingap folding device for successively folding down the cover and cover nap of each carton and engaging the cover flap and the tuck flap thereof with the side of the carton.

2. A machine for closing rectangular paper cartons having end wall flaps and a cover hingedly connected to one side wall anda cover flap on the swinging edge of tliecover with a tuck flap on the edge of the cover nap, as the 'cartons are continuously translated along a conveyor in an endwise position comprising, a leading and flap folding device positioned along side said conveyor and including a vertical disc tangent on its lower side to the plane of the top of said cartons, said disc having folding plates secured to diametrically opposite sides thereof and projecting transversely across the lpath of travel of said cartons, means for rotating said disc at a peripheral speed less than the lineal speed of said cartons and in timed relation thereto to present each one of said plates in front of alternate incoming cartons, said folding plates having radially projecting flap engaging projections on the trailing edges thereof, a trailing flap folding device positioned alongside said conveyor behind said leading nap folding device and including a fixed cam plate with an irregular cam opening therein, a shaft projecting through said opening, a double armed crank member on said shaft, crank levers pivotally carried on the swinging ends of said crank member and having cam follower rolls spring urged into Vengagement with the edge of said cam opening to control movement of the levers about their pivots, trailing flap folding plates connected to the pivots of said crank levers for rotation thereby, said trailing flap folding I plates extending transversely across the path of said cartons, and Ymeans for rotating said shaft and the crank member and plates carried thereby at a peripheral speed greater than the lineal speed of said cartons and in timed relation thereto whereby each oneof the plates overtakes and engages the trailing end flaps of alternate cartons, said trailing flap folding plates having fiap edge engaging projections on the swinging edges thereof, said cam opening having a re-entrant i portion arranged to swing said crank levers and said trailing flap folding plates to above a horizontal position on the downward motion of each lever with said member to clear incoming flans.

3. A machine for closing rectangular paper cartons having end wall flaps and a cover hingedly connected to one side wall and a cover flap on the swinging edge of the cover with a tuck ap on the edge of the cover flap, as the cartons are continuously translated along a conveyor in an endwise position comprising, a, leading end flap folding device positioned alongside said conveyor and including a rotatable member rotatable about an axis extending transversely over the path of said cartons, means for rotating said first member in timed relation to said conveyor, folding plates secured to said member and projecting transversely across the path of travel of said cartons, the peripheral spacing of said plates beingless than the spacing of said cartons and the rotationalrspeed of said first member being such that said plates register successively with leading end flaps of successive cartons and whereby the plates move at a peripheral speed less than the lineal speed of said cartons, said folding plates having radially projecting flap edge engaging projections on the trailing edges thereof, a trailing flap folding device positioned alongside said conveyor behind said leading flap folding device and including a fixed cam plate having an irregular closed circuitous cam surface thereon, a shaft projecting normally to the Jlane of said surface, a double armed crank member on said shaft, crank levers pivotally carried on the swinging ends of said crank member and having 8 Vcam followers varranged vto travel along said cam surface, trailing flap folding plates connectedto the pivots of said crank/levers for rotation thereby, said trailing vflap folding plates extending transversely across the path of said cartons, and means for rotating said shaft and crank member in timed relation to said conveyor whereby the plates carried by said levers travel at a peripheral speedrgreater than the lineal speed of said cartons and the length of the path of travel of the plates being such that each one of the plates overtakes and engages the trailing end flaps of alternate'cartons, said trailing flap folding plates having flap edge engaging projections on the edges thereof that lead the plates on their forward'motion-said cam surface having a reentrant portion arranged to swing said crank levers and said trailing flap folding plates to above a horizontal posi-tion lon the downward motion of each lever to clear incoming flaps and to thereafter hold said 'plates in a horizontal flap folding position to thebottom of the swing of the plate.

'4. A Vmachine for`V closing rectangular paper cartons having end wall flaps and a cover hingedly connected to one side wall and a cover iiap on theswinging edge of the cover with a tuck -ap on vthe edge of the cover flap, as the cartons are continuously translated, along a conveyor iny an endwise position comprising, a leading end nap folding device positioned alongside said conveyor and including a rst rotatable member rotatable about an axis extending transversely over the nath of travel of said cartons, said member having a folding plate `secured to a radially disposed portion thereof and projecting transverseiy across the path vof travel of said cartons, means for rotating said first member in timed relation to said conveyor with said plate being rotated at a peripheral speed less than the lineal speed of said cartons but with the plate registering with the leading end flap of a carton on each revolution of said rotatable member, said folding plate having a radially projecting flap engaging projection on the trailing edge thereof, a trailing 'lap folding device positioned alongside said conveyor behind said leading ap folding device and including a second rotatable member rotatable about an axis extending transversely` above the path of travel of said cartons, a crank on said second member,

a lever pivotallf,7 carried on the swinging end of.

.said crank, cam means engageable with said lever to move the same on its pivot as said lever is translated by said crank, a trailing flap folding plate connected to the pivot of said lever for rotation thereby, -said trailing fiap folding plate extending transversely across the path of said cartons, and means for rotating said second member in timed relation to said conveyor whereby the plate carried by .said lever travels at a peripheral speed greater than the lineal speed of said cartons but with the plate registering with the trailing flap of a carton on each revolution of said second member whereby the plate overtakes and engages the trailing flap of a carton, said trailing flap folding plate having a flap engaging projection on the edge thereof that leads the plate on its forward motion, said cam means having a portion arranged to swing said lever and trailing flap folding plate to a horizontal position to clear incoming flaps and to thereafter guide said plate in a generaliy horizontal nap folding position to the bottom of the swing ofthe plate. Y

5. A machine forclosing rectangular paper cartons having end wall flaps and a cover hingedly connected to one side wall and a cover flap on the swinging edge of the cover with a tuck flap on the edge of the cover flap, as the cartons are continuously translated along a conveyor in an endwise position comprising, a leading end flap folder positioned alongside said conveyor and including, a folding plate projecting transversely across the path of travel of said cartons, means for swinging said plate in a downward and forward swinging motion to in front of said leading flaps and at a peripheral speed less than the lineal speed of said cartons and in timed relation to said conveyor, said folding plate having a downward- 1y projecting flap engaging projection on the trailing edge thereof, a trailing-flap folding device positioned alongside said conveyor behind said leading flap folding device and* including a trailing flap closing plate extending -transversely across the path of said cartons, and means for swinging said second plate in a downward and forward swinging motion over the trailing edges of said cartons and at-a peripheral speed greater than the lineal speed of said cartons whereby the plate overtakes and engages thetrailing flaps ofcartons, said trailing nap folding plate 'having a flap engaging ,projectionv on the leading edge thereof. f I

6. A machine for closing rectangular paper cartons having end flaps on the-tops of the end walls thereof and covers hingedlyconnected to a side wall and cover. flaps on-the swinging edges of the covers with tuck flaps on the swinging edges of the cover flaps, as the cartons are continuously translated in an endwisedirection along a conveyor comprising, an element extending across said conveyor for'folding each leading end flap inwardly of its carton, a second member projecting across said conveyor for'foldingeach trailing end flap inwardly of its carton, afoldingbar extending obliquely across said conveyor and inclined downwardly behind said Arotatable, members-to rengage and fold each cover downwardly to an inclined position, a longitudinal guide bar positioned over'the open edge of said cartons and arranged co-support covers .moved 'thereagainst by said folding bar, a crimping wheel positioned alongside said conveyor behindl said folding bar and engageable with'the folded edge of said cover to crimp the fold thereof, said' folding bar having a horizontal reach opposite' said Vwheel to hold said cover against'said guide bar; a cover iiap folding wheel rotatable over said guide bar to hold the swinging edge of said cover against said guide bar, a cover-flap folding flange having an axially cammed surface carried by said cover folding wheel and rotatable into engagement with the cover flap to fold the flap alongside of said guide bar, ay cover depressing wheel positioned alongside said conveyor and behind said cover flap folding wheel, said depressing wheel having a peripheral portion lapped alongside of said cartons and a cam portion engageable with the top edge of each cover to depress the cover to closed position, an axially extendingpin slidably carried by said peripheral portion and spring biased away from said cartons, Aand a xed cam positioned in the path of the end of said pin to force said pin inwardly against the tuck flap on the cover flap of each carton as the cover and cover flap are depressed by said cam portion whereby the side wall and tuck flap of the carton are laterally deflected and permit the tuck flap to enter a locking slot providedy therefor in the side wall of the carton, anda pressure'roll positioned overthe edge of ksaid' conveyor and behind said cover depressing wheel to press the cover flap fold on each carton and further seat the tuck nap.

rI. A machine for closing rectangular paper cartons having end flaps on the tops of the end wall-s thereof and covers hingedly connected to a side wall and cover flaps on the swinging edges of the covers with tuck flaps on the edges of the -cover flap-s as the cartons are continuously translated in an endwise direction along a conveyor comprising, an element extending across said conveyor and swingably mounted for folding each leading end flap inwardly of its carton, a second member projecting across said conveyor and swingably mounted for folding each trailing end flap inwardly of its carton, a folding bar extending obliquely across said conveyor and inclined downwardly behind -said rotatable members to engage and fold each cover downwardly to an inclined position, a longitudinal guide bar positioned over the open end of said carton-s and arranged to support cover-s mov-ed thereagainst by said folding bar, -a cover ap folding wheel rotatable over said guide bar to hold the swinging edge of said cover against said guide bar, a cover flap folding flange having an axially cammed surfa-ce carried by said cover folding wheel and rotatable into engagement with the cover flap to fold the iiap alongside of said guide bar, a -cover depressing wheel positioned alongside said conveyor and behind said cover flap folding wheel, said depressing wheel having a peripheral portion lapped alongside of said cartons and a cam portion engageable with the top edge of each cover to depress the cover to closed position, an Iaxially extending pin slidably carried by said peripheral portion and spring biased away from said cartons, and a fixed cam position-ed in the path of the end of said pin to force sai-d pin inwardly against the tuck flap on the cover flap of each carton as the cover and cover flap are depressed by said cam portion whereby the side waliand tuck flap of the carton are laterally deflected and permit the tuck flap to enter a locking slot provi-ded therefor in the side wall of the carton. f l v 8. A machine for closing rectangular paper cartons having end flaps on the tops of the end walls thereof and covers hingedly connected to a side wall and cover flaps on the swingingedges of the covers with tuck flaps on the edges of the cover iiaps, as the cartons are continuously translated in `an endwise direction along a conveyor com-pri-sing, means extending across said conveyor for folding each leading end flap inwardly of its carton, other means projecting across said conveyor for folding each trailing end flap -inwardly of its carton, cover folding means positioned behind'said iiap folding means to engage and fold ea-ch cover transversely downwardly to an incline-d position, a longitudinal guide bar positioned ,over the open edge of said cartons to sup-port covers moved thereagainst by said cover folding means, a crimping wheel positioned alongside y.said conveyor behindV said cover folding means and engageable with thefold'ed edge of said cover to crimp the fold thereof, a cover flap folding wheel rotatable oversaidv guide bar to hold the swinging edgeof said cover against said guide bar, a cover flap folding flange having an axially cammed surf-ace carried ,by ,said cover folding wheel and rotatable into engagement with the cover flap to fold the flap alongside of said guide bar, a4 cover depressing wheel positioned alongside said conveyor and behind said cover-Hap folding lwheel, said 'depressing wheel and a cam portionengageable-with-the top edge of each vcover to depress the cover to closed position, an axially extending pressure member slidably carried by said radially extending portion and spring biased away from said cartons, a iixed abutment positioned in the path of the end of said pressure member to force the same inwardly against the tuck flap on the cover nap of each carton as the cover-and cover nap are depressed by said'cam portion wherebythe side wall and tuck ap of the carton are laterally deflected and permit the tuck iiap to enter a locking slot provided therefor in the side wall of the carton.

131. In a machine for closing paper cartons, a mechanism for folding a cover and cover flap downwardly against the side Wall of the carton and for engaging a tuck flap on the cover flap in a lock slot in the side wall of the carton comprising, a conveyor for continuously translating the carton with its cover in apartially closed inclined position and thecover flap` inclined downwardly'from `the coverj a wheel rotatable in a plane alongside v'of' the carton and cover nap and driven in timed vrelationship with said conveyor, an axially extending pin slidably carried by a peripheral portion of said wheel and spring biased away from said carton, a fixed'cam positioned opposite the outer end of saidpinhearthe' lower limit of travel thereof to force said pin inwardly against the tuck nap and side wall of the carton, a cam on said wheel and rotatable therewith to depress the edgeof said cover and said cover flap-while saidtuck flap is deflected, a hold-down plate positioned over said-conveyor and carton and between the'upper rim of the carton and said cover, said hold-down" plate extending past said wheel, and a inal closing wheel positioned behind the end of said plate and freely rotatably engageable with the cover to press the swinging end of said cover downwardly after said cover has cleared said support plate.

le. In a machine for closing paper cartons, a mechanism for folding a cover and cover flap downwardly against the side wall of the carton and for engaging a tuck flap on the cover flap in a lock slot in the side Wall of the carton comprising, a conveyor for continuously translating the carton with its cover in a partially closed inclined position and the cover flap inclined downwardly from the cover, a wheel rotatable in a plane alongside of the carton and cover flap and driven in timed relationship with said conveyor, an axially extending pin slidably carried by a peripheral portion of said wheel and spring biased away from said carton, a fixed cam positioned opposite the outer end of said pin near the lower limit of travel thereof to force said pin inwardly against the tuck ap and side wall of the carton, and a cam on said wheel and rotatable therewith to depress the edge of said cover and said cover iiap while said tuck nap is deflected.

15. In a machine for closing paper cartons, a mechanism for folding a cover and cover flap downwardly against the side wall of the carton and for engaging a tuck flap on the cover flap in a lock slot in the side wall of the carton comprising, a conveyor for continuously translating the carton with its cover in a partially closed inclined position and the cover ap inclined downwardly from the cover, a wheel rotatable in a plane alongside of the carton and cover flap and driven in timed relationship with said conveyor, an axially extending pressure member slidably carried by a radially extending portion of said wheel to be translated past the side of each car- -ilap is deflected.

ton and spring biased away from said carton, a fixed abutment positioned opposite the outer end of said member near lthe lower limit of travel thereof and camrningly engageable with said member, to force said member inwardly against the tuck flap and side wall of the carton, and a cam on said wheel and rotatable therewith to depress the edge of said cover and said cover flap while said tuck iiap is deiiected.

16. In a machine for closing paper cartons, a mechanims for folding a cover and cover ap downwardly against the side wall of the carton and for engaging a tuck iiap in a lock slot in the side wall of the carton comprising, a conveyor for continuously translating the carton with its cover in a partially closed linclined position and the cover iiap inclined downwardly from the cover, means movalblein a plane alongside of the carton and cover iiap and driven in timed relationship with said conveyor, said means having a vertical component of motion, a transversely extending pressure member slidably carried by said means and spring biased away from said carton, a fixed abutmentpositioned opposite the outer end of said member n-ear the lower limit of travel thereof and cammingly engageable therewith to force said member inwardly against the tuck flap and side wall of the carton, and a horizontal surface on said means engageable with the top of the cover and said cover fiapwhile said tuck 17. In a machine foi` closing paper cartons, a mechanism for foldingy a cover and cover flap downwardly against the lside wall of the carton and for engaging a tuck fiap on the cover flap in a lock slot in the side wall of the carton comprising, a conveyor for continuously translatingr the carton with its cover in a partially closed inclined position and the cover ap inclined downwardly from the cover, means movable in a plane alongside of the carton and cover iiap and driven in timed relationship with said conveyor, said means having a vertical component of motion, a pressure member carried by said means and mov able transversely with respect thereto, an abutment positioned opposite the outer end of said member near the lower limit of travel thereof and cammingly engageable therewith to force said member inwardly against the tuck flap and side wall of the carton, and a horizontal surface on said means engageable with the top of the cover to depress the edge of said cover and said cover ap while said tuck flap is deflected.

'18. In a machine for closing paper cartons, means for folding an end flap on the trailing wall of the carton inwardly as the carton is continuously translated in an endwise direction cornprising, a rotatable member positioned in a plane alongside the path of said carton, a flap folding plate projecting normally from a radially disposed portion of said member across the path of the carton, said plate being rotatable about a transverse axis and positioned on said member to be approximately level with the top of the carton at the lower limit of motion of the plate, a lever carried by said member and non rotatably connected to said plate, spring means biasing said lever and plate to extend the plate radially outwardly of said member, a flap edge engaging flange turned rearwardly from the swinging edge of said plate, cam means positioned adjacent to said member and engageable with said lever to swing said lever and plate to radially inwardly directed position with said flange turned downwardly as said plate approaches the flap on the carton, said can surface thereafter permittingthe downward rotation, of: Said plate. and, it flange against .thetrailmg side Qf- SaidV flea and. means for rotating said member, in timedre-v latio-nship withV said conveyor whereby saidplate is swung downwardly in an overtaking motion behind.V said ap.

19. In a machine, for closingY paper. cartons, means for folding anendviap on theV trailingwall of the carton inwardly as the carton is continuously translated in an endwise direction cornf-` prising, a rotatable member positioned in a plane alongside the pathjof said carton, aA flap folding plate projecting normally fromV a radially disposed portion of; said member across the path of the caltonjsaidplatebeing rotatableoabouta transverse axis. and positioned- On Said-member t0 be approxmately4 level-with. the topA of the carton Yatthe lower limit ofmotionoi-` the plate,

a lever carried by said member and nonrotatably connected to said plate, Ya flap edge engaging projection on the swinging edge of said plate, cam means positioned adjacent to said-member andengageable with said leverto direct. the Inction thereofand swing said lever and plate to radially inwardly directed position with saidprof jection turned downwardly as said plate ap-V preaches the apro'n the carton, said camsurface thereafter directing the downward rotation of said plate and its projection against the trailing side of said nap, and means f or rotating said member in timed relationship with said conveyor whereby saidplate is swung downwardly in an' overtaking motionbehind said nap.

20. In aA machineV for closing paper cartons,

means for folding an end nap on the trailing wall of the carton inwardly as the. carton is con.-

16 tinnously translated in an endwisedirectonconif; pi'ising, a support vmember `movably "positioned adjacent the path ofV saidfcarton, afap-folding plate carried by said member and projecting across the path of the cartonfsai'd plate being rotatable about a transverse axis and positioned on said member to be approximately level with the top of the carton at the lower limit of motion of the plate, a lever carried by said member and nonrotatably connected to saidplate, a ap edge engaging projection on the swinging edge of said plate, cam means positioned adjacent to said member and engageable with said leverv to direct the motion thereof and swing said plate to generally horizontal position with said projection turned downwardly as said plate approaches the nap on the carton, said cam surface thereafter directing the downward rotation of said plate and its projection against the trailing side of said flap, and means for moving said member in an oscillatory motion having a vertical ccmponentfand in timedrelationship with saidconveyor whereby said plate is swung downwardly in an overtaking motion behind said flap.

WAYNE A. WOOD.

REFERENCES The following references `are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date '787,696 Redd Apr. 18, 1905 995,965 Heybach June 20, 1911 1,348,643 Har-ris Aug. 3, 1920 2,340,835 Malhiot Feb. 1, 1944 2,577,529- Kerr Dec. 4, 1951

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745323A (en) * 1952-11-10 1956-05-15 Ex Cell O Corp Flat top container fabricating machine
US2849846A (en) * 1953-11-16 1958-09-02 Alexander Donald Carton closing machine
US2910815A (en) * 1953-08-14 1959-11-03 Smith Kline French Lab Box closing machine
US2911889A (en) * 1954-06-25 1959-11-10 Ormonde P Welsh Box folding machine
US2911779A (en) * 1957-01-17 1959-11-10 Package Machinery Co Tucking mechanism for wrapping machines
US2927411A (en) * 1954-10-22 1960-03-08 Fmc Corp Carton closing machine
US2927412A (en) * 1955-03-17 1960-03-08 Fmc Corp Carton closing machine
US2935832A (en) * 1958-02-03 1960-05-10 Edward M Mischke Box making machine
US2948094A (en) * 1956-01-11 1960-08-09 Diamond National Corp Packaging
US2974460A (en) * 1952-12-08 1961-03-14 Regnitz Konstruktionsgesellsch Method of and apparatus for sealing the layers of the sealing bands of cartons
US2975574A (en) * 1960-02-29 1961-03-21 Pacific Coast Foil Company Flexible cover applicator
US2991610A (en) * 1958-10-06 1961-07-11 Brock & Company Inc Box closing machine
US2998688A (en) * 1958-09-11 1961-09-05 Jr Arthur E Randles Egg carton closing machine
US3010266A (en) * 1958-11-04 1961-11-28 Chicago Carton Co Carton closing machine
US3045408A (en) * 1960-01-11 1962-07-24 Marlin B Rasmusson Packaging machine
US3058271A (en) * 1955-02-03 1962-10-16 King O Matic Equipment Corp Carton feeding, erecting, filling and closing mechanism
US3124914A (en) * 1964-03-17 Figure
US3137112A (en) * 1960-07-12 1964-06-16 Ludvik E Kulleseid Carton closing machine
US3166994A (en) * 1961-11-03 1965-01-26 Ex Cell O Corp Rotating carton tucker apparatus
US3314217A (en) * 1964-01-30 1967-04-18 Premier Tool Works Inc Egg carton closing machine
US3421288A (en) * 1965-01-14 1969-01-14 Bivans Corp Carton-closing machine
US3602107A (en) * 1969-06-20 1971-08-31 Riegel Paper Corp Carton flap folder
US3703067A (en) * 1970-10-06 1972-11-21 Procter & Gamble Rotating carton flap manipulator
US4092906A (en) * 1976-11-12 1978-06-06 Ab Akerlund & Rausing Carton flap folding mechanism
US4317320A (en) * 1979-09-17 1982-03-02 Johns-Nigrelli-Johns, Inc. In-line carton slitting, flap folding and flap gluing apparatus
US5243808A (en) * 1992-09-01 1993-09-14 Kliklok Corporation Flanged carton sealing apparatus and method
US20080000197A1 (en) * 2006-06-30 2008-01-03 O.A.M.-Societa' Per Azioni Device for closing boxes and the like
WO2010013267A1 (en) * 2008-07-31 2010-02-04 Dp S.R.L. Folding assembly, particularly for products to be packaged

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US787696A (en) * 1903-07-13 1905-04-18 Isaac Pieser Machine for closing and sealing the tops of cartons.
US995965A (en) * 1911-06-20 American Automatic Machinery Company Carton-closing machine.
US1348643A (en) * 1919-03-17 1920-08-03 Arthur W Harris Package closing and locking mechanism
US2340835A (en) * 1941-07-10 1944-02-01 Redington Co F B Packaging apparatus
US2577529A (en) * 1946-07-08 1951-12-04 Fmc Corp Carton handling machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US995965A (en) * 1911-06-20 American Automatic Machinery Company Carton-closing machine.
US787696A (en) * 1903-07-13 1905-04-18 Isaac Pieser Machine for closing and sealing the tops of cartons.
US1348643A (en) * 1919-03-17 1920-08-03 Arthur W Harris Package closing and locking mechanism
US2340835A (en) * 1941-07-10 1944-02-01 Redington Co F B Packaging apparatus
US2577529A (en) * 1946-07-08 1951-12-04 Fmc Corp Carton handling machine

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124914A (en) * 1964-03-17 Figure
US2745323A (en) * 1952-11-10 1956-05-15 Ex Cell O Corp Flat top container fabricating machine
US2974460A (en) * 1952-12-08 1961-03-14 Regnitz Konstruktionsgesellsch Method of and apparatus for sealing the layers of the sealing bands of cartons
US2910815A (en) * 1953-08-14 1959-11-03 Smith Kline French Lab Box closing machine
US2849846A (en) * 1953-11-16 1958-09-02 Alexander Donald Carton closing machine
US2911889A (en) * 1954-06-25 1959-11-10 Ormonde P Welsh Box folding machine
US2927411A (en) * 1954-10-22 1960-03-08 Fmc Corp Carton closing machine
US3058271A (en) * 1955-02-03 1962-10-16 King O Matic Equipment Corp Carton feeding, erecting, filling and closing mechanism
US2927412A (en) * 1955-03-17 1960-03-08 Fmc Corp Carton closing machine
US2948094A (en) * 1956-01-11 1960-08-09 Diamond National Corp Packaging
US2911779A (en) * 1957-01-17 1959-11-10 Package Machinery Co Tucking mechanism for wrapping machines
US2935832A (en) * 1958-02-03 1960-05-10 Edward M Mischke Box making machine
US2998688A (en) * 1958-09-11 1961-09-05 Jr Arthur E Randles Egg carton closing machine
US2991610A (en) * 1958-10-06 1961-07-11 Brock & Company Inc Box closing machine
US3010266A (en) * 1958-11-04 1961-11-28 Chicago Carton Co Carton closing machine
US3045408A (en) * 1960-01-11 1962-07-24 Marlin B Rasmusson Packaging machine
US2975574A (en) * 1960-02-29 1961-03-21 Pacific Coast Foil Company Flexible cover applicator
US3137112A (en) * 1960-07-12 1964-06-16 Ludvik E Kulleseid Carton closing machine
US3166994A (en) * 1961-11-03 1965-01-26 Ex Cell O Corp Rotating carton tucker apparatus
US3314217A (en) * 1964-01-30 1967-04-18 Premier Tool Works Inc Egg carton closing machine
US3421288A (en) * 1965-01-14 1969-01-14 Bivans Corp Carton-closing machine
US3602107A (en) * 1969-06-20 1971-08-31 Riegel Paper Corp Carton flap folder
US3703067A (en) * 1970-10-06 1972-11-21 Procter & Gamble Rotating carton flap manipulator
US4092906A (en) * 1976-11-12 1978-06-06 Ab Akerlund & Rausing Carton flap folding mechanism
US4317320A (en) * 1979-09-17 1982-03-02 Johns-Nigrelli-Johns, Inc. In-line carton slitting, flap folding and flap gluing apparatus
US5243808A (en) * 1992-09-01 1993-09-14 Kliklok Corporation Flanged carton sealing apparatus and method
US20080000197A1 (en) * 2006-06-30 2008-01-03 O.A.M.-Societa' Per Azioni Device for closing boxes and the like
US7328546B2 (en) * 2006-06-30 2008-02-12 O.A.M. - Societa' Per Azioni Device for closing boxes and the like
WO2010013267A1 (en) * 2008-07-31 2010-02-04 Dp S.R.L. Folding assembly, particularly for products to be packaged

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