US1680615A

US1680615A - Carton-folding machine

Info

Publication number: US1680615A
Application number: US230265A
Authority: US
Inventors: Hoba August
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-11-01
Filing date: 1927-11-01
Publication date: 1928-08-14
Anticipated expiration: 1945-08-14

Description

Aug. 14, 1928. 1,680,615

. A. HOBA CARTON FOLDING MACHINE File Nov 1, 1927 5 Sheets-Sheet 1 gin vent MMXW Aug. 14, 1928. 1,680,615

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Huguaa Hoba Aug. 14,1928.

Filed Nov. -1, 1927 A. HOBA cmm'ou FOLDING mcnms UV pv 5 Sheets-Sheet 5 fiy usr Hoba Fatented Aug. 14, 1928.

UNITED STATES AUGUST HOIBA, OF SEATTLE, WASHINGTON.

CARTON-FOLDING MACHINE.

Application filed November 1, 1927. Serial No. 280,865.

My invention relates to machines for folding paper cartons of the type having overlapping end flaps provided with complemental interlocking slot and tongue.

The object of my invention is to provide a machine which will reliably fold such cartons at a reasonably rapid rate, leaving them in position for filling, and one which is cheap to build "and operate, thus especially adapting it for places where the number of cartons to be filled will not justify a highly elaborate and, expensive machine My invention consists of a machine which is operable byhand, both as to placin the carton blanks and actuating the mac ine. It is, of course, evident that power actuating connections may be applied thereto, and also that the applicationof automatic feeding means for the blanks is not forbidden.

My invention consists of certain novel constructions and combinations of parts which will be hereinafter described. The

novel parts upon which I claim patent protection. will be particularly pointed out in the claims. p

In the accompanying drawings I have shown a construction in which my invention is embodied, the same being chosen as adapted to illustrate the principles of my invention without, however, implying that my invention is limited solely to the construction illustrated.

Figure -1 is a'front elevation of the machine with parts thereof at the left-hand portion of the figure in section.

Figure 2 is a sectional elevation taken on;

a plane extending from front to rear just forward of the center of its width Figure 3 is a plan view of the folding means, showing t ese in open position.

Figure 4 is a transverse section of the foldin means in the position occupied when the fo ding operation has been completed. Figure 5 is a longitudinal section through one of the endflap folding wings, this being on the line 55 of Figure 3. Figures (Sand 7 are sectional elevations, viewed from the front, showing the folding mechanisms in consecutive positions, Figure 7 being that occupied at the completion of'the fold.

Figures 8, 9 and 10 are perspectives showing successive steps in the olding operation and the positions occupied by the folding members during such operation.

The type of cartonupon which my in-.

vention is desi ned to operate, is that which has end flaps folding together to constitute the end walls and in which two flaps extending from opposite side sections are provided, respectively with complemental slot and interlocking tongue entering said slot. In constructing my machine any suitable type of supporting frame may be employed.

In general it will have a table or workin surface, as 1 which has mounted thereon or incorporated therein the folding members.

In this table is located a recessed die or carton-receiving and folding member 10, of i a size corresponding with that of the folded carton. In depth it may be a minor portion only of that of the folded carton. the front side of this recess the table surface is raised, forming a ledge or platform 11 upon which is placed the-front side section of the carton when it is positioned for folding.

Mounted for vertically reciprocating -movement above this die or recess '1, an

Along pin 28 carried by the plunger guide rods 20,

and a rod 24 which connects the swinging end of lever 21, with an operating treadle 25 which is pivoted at 27. A spring, as 26, may be employed to raise these parts after their depression. Also, a counterweight 29 or its equivalent may bemounted upon an extension of the lever 21. s

At each end of the forming're'cess or die tions in the folding cycle to l start the upward folding of those end flaps 44 which are connected with the end ed es of the bottom section 4 of the carton, as t e plunger 2 starts pressing the carton blank into the die. It has another function at a later point in the cycle.

Hinged at either end of the forming die 10 is a folding win 5. The purpose of these is to fold over t e end

flaps

46 and 48 which are connected with respectively the 10 is an abutment,finger 3 which first funcrear side section 41 and the front side section 40 of the carton. The hinges .50 of these 'wings have their axes inclined somewhat to the plane of the end of the carton, as is clearly illustrated by the inclined position of the wings in Figures 3 and 8. The means illustrated for actuating these wings are as follows: To the back of each wing is pivoted a rod 6 which is pivoted to a lever 60, the latter being pivoted at 61 and upon its other end preferably provided with roller 62 designed to reduce friction. These ends of levers 60 are engaged and depressed by engagement therewith of a head 63 carried by a vertically reciprocating rod 64 slidable in a guide 67. The upper end of rod 64 has ahead 65 which is engaged, with the carton intervening, by the plunger 2 when it is forced into the die 10 to thereby cause the levers 60 to swing and these to swing up the folding wings 5. A spring 66 raises the rod 64. Additional springs ma be desirable to cause prompt return swing of the folding wings.

At the rear edge of the die 10 is'a folding plate 7, pivoted at 70 to have an end 71.projecting somewhat into the outline or area of the die. At each side of the arm or plate 7 and at the rear edge of the forming die or recess 10, are elevations 73 extending slightly above the level of the working surface of the table 1, these acting to start the upward swin of the rear section 41 of the carton and o the parts connected therewith, before the upward swing of plate 7 begins. When the latter swings upwardly, its forwardly curved tips 72 contact with the end flaps 45 to swing these and flaps 46 forwardly to where they are engaged by the folding wings 5 to complete the fold and the tucking of the ton e 47 into place. The tongue 47 has a slig t cut 49 in its forward edge which forms a locking engagement with the walls of slot 49 to prevent withdrawal of the tongue.

The active face of folding wings 5 are of peculiar shape. That portion of the front end section lying forwardly of the rear end of the slot 49 in end flap 48, is cut away or recessed to a point outwardly of its hinge which will permit the ledge 51 to extend over the upper end of the abutment fingers 3. The rear end section 52 of the acting face of wing 5 slopes towards its back face which together with the angular position of the pivot axis 50 causes somewhat slower folding action of the flap 46 than of flap 48. In consequence flap 48is folded up first so as to lie inside of flap 46.

As the plunger 2 descends the end flaps 48 are positioned so that abutment fiangers 3 slightly press or hold outwardly that por-. tion of flaps 48 just below slots 49 while the edge or rib 51 of wing 5 forces that part of the same flaps above said slots inwardly,

thereby opening the slots so that as flap 46 is swung forwardly, the tongues 47 will be caused to enter the slots to a point where they lock the two flaps together. In doing this the tongues slide over and are guided by the surfaces 52 of the rear section of folding wings 5. The carton is left folded, but with the top open for reception of its contents.

If it is desired to provide the carton with a lining paper, this is placed with the carton and is folded therewith. Guide stops of any suitable character may be'fprovided to accurately position the carton or folding. Such stops 8 are shown in Figure 3.

What I claim as my invention is:

1. In a machine for folding cartons of the e having end fla s of which one has a slit and the other a locking tongue adapted to enter the said slit, a reciprocating plunger about which the carton sides are folded, a stationary finger at each end of the carton adapted to engage the inner face of the end flap which contains the tongue-receiving slit at a point just below said slit to hold the same outwardly, folding wings engaging the outer faces of the end flaps, and means for swinging them upwardly and inwardl to fold the end flaps, means for simi arly swinging the back side section of the carton and its attached end tuck flaps, the end flap folding wings having an inward projection positioned to engage the slitted end flaps just above the slits therein to act in conjunction with the above named fingers to open said slits for the reception of the locking tongues.

2. A carton folding machine having means for folding up the front side flaps and their attached slitted end flaps, means for folding up the back side flaps and its attached tongue carrying end flaps, fingersengaging the inside faces of the said slitted end flaps just below their slits, and folding wings movable to fold down said end flaps and having projections engaging the slitted end flaps just above their slits to thereby open said slits to receive the locking tongues of the other end flaps.

3. A carton folding machine comprising a table section having a carton receiving recess forming a folding die, the forward side edge thereof being highest to first fold the front side wall of the carton, wings hinged at the ends of said recess to swing upwardly and inwardly to fold the end flaps, a plunger guided to reciprocate, vertically to engage and depress the carton bottom and to also thereby fold the front and rear sides of the carton, a plunger mounted for vertical movement beneath the carton bottom and connected with said wings to actuate them.

4. A carton folding machine comprisin a recesseddie of a size corresponding with t e folded carton, a carton folding plunger llD tuated by the depression'of the last named.

plunger to actuate said end folding wings.

5. In a carton folding machine, means for folding up theback and front side sections of the carton, and those end sections of the carton which are directly attached to the bottom section, folding wings operable in a swin ing manner to engage the interlocking end aps which are directly connected with tive end flaps, an abutment finger engaging the end edges of the front and back sections of the carton to fold said flaps into place, said wings bein constructed and operated to swing into p ace that one of said flaps which contains the locking slot in advance of that one which contains the locking tongue.

i 6. In a carton folding machine, means for folding up the back and front side sections of the carton, and those end sections which are directly attached to the bottom section, folding wings hinged at each end of the carton upon axes which are somewhat inclined to'the plane ofthe folded carton end, whereby when swung upwardly one of the interlocking end ,flaps,will be swung into place slightly in advance of the other.

7. In a carton folding machine, means for folding up the back and front side sections of the carton, and those end sections which are directly attached to the bottom section, folding wings hinged at each end of the carton upon axes which are somewhat inclined to the plane of the folded carton end, in a direction which folds into place that end flap which contains the interlocking slot slightly in advance of the folding into place of the flap which contains the interlocking tongue.

8. In a machine for folding cartons having interlocking slot and tongue in respecface of that flap containin the inner face of that flap which contains the slot at a point just below the slot, a folding wing hinged to swing upwardly to engage said interlocking end flaps and swing them into the plane of the carton end, said wing having a surface engaging the outer the slot along a line extending just above the slot and being relatively recessed below said slot, whereby the same co-operates with the abutment finger to open said slot for the reception of the locking tongue.

9. In a machine for folding cartons having interlocking end flaps folding, wings hinged at the ends of the carton to fold over the interlocking end flaps, the folding faces of said wings when the wing is swun up being inclined away from the plane the carton end opposite the rear half of the carton end, and in the forward half being recessed .back from the level of the slot downwardly, an abutment finger engaging the inner face of the end flap containing the slot and positioned to lie within said recess, and means for swinging the interlocking end flap containing the tongue after the slotcontaining flap has been folded into position.

10. In a machinefor folding cartons, a die member into which the carton is folded, a reciprocating plunger adapted to enter said die to fold the carton, folding wings at the end of the die pivoted to swing upwardly to fold the end flaps, a vertically movable plunger extending into the die recess from below, two levers pivoted beneath the die and having ends engaged by said last named plunger to be swun thereby, t-he plunger engaged ends of said levers being 0 a len h to permit the plunger to pass between t em when they have reached a predetermined angle of swing, and links connecting the other ends of said levers with the folding wings to thereby swing them;

Signed at Seattle, Washington, this 26th day of October, 1927.

AUGUST HOBA.