US2045254A - Bag closing machine - Google Patents

Description

June 23,v 1936.

P. G. scr-n E/HWER` 1 045,254

BAG CLSING MACHINE Filed Nov. 17, 1955 4 Sheets-Sheet 1 ATTORNEYS June 23, 1936 P. G. scHLEMMER BAG CLOSING MACHINE 4 Sheets-Sheet 2 a. \I 5 l G Z 6 2 6 ro HH w .Ihw o0 MW l: a .Jnff .5 |M I i n o0 C L n Z I n 1". l l l I m L- lv n 5 l .l ro a O 6 Z 7. Z J 3 ,7. L 3 Z H.

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BAG CLOSING MACHINE vFiled NOV. 17, 1935 4 Sheets-Sheet 5' nl u (Hlm, y 49 June 23, 1936.

PfG. scHLEMMi-:R

BAG CLOSING MACHINE Filed NOV. 17, 1955 Patented June 23,1936 Y. 2,045,254

UNITED rs-"LIAT.Es v.PATENT OFFICE W 2;'o45e5ii BAG CLOSING MCHINE Phil G. Schlemmer, Nanu'et, NRY.; assigner, by

A esne assignments, to yRose' 'Barbara Henderson Application November. u, is'sazseriai No. 698,383

- 4 claims. w1-.-93-6i My invention relates 'tol a new Vand improved the iaps 2 and 4 have been previously bent into bag closing machine. the horizontal position.

One of the objects of vmy invention sto pro- The `carton l is provided with a liner bag L vide an improved machine for closing a bag `w.`r 1ich; carn be made of paper or any other suitwhich is located within an outer'carton which V'is able material. When the carton is pushedinto 5 made of cardboard or the like. lthe machinesaid liner L has Yan upstanding top Another object of my invention is to provide .a portion which projects above the body of the new and improved method or system for `closing -cartonso as rto form an open mouth of rectanguthe mouth of a liner .bag ofn said type, while closlar cross section. lo ing the end aps of the outer cardboard ccm-- Y Referring to Figs. 7 and 8, these gures 'show 10 tainer. f three spreader devices 6, la and 1b. The spread- Other objects of my invention will beset forth .er devices laand 'Ib can be moved towards each in the following description and drawings which other and away. 'from each other, so as to slide illustrate a preferred embodiment thereof. upon the, adjacent surface of the member 6. l5 Fig. 1 is a front elevation vof the improved ma- When the members 'la and Tb abut each other :15 chine. l e their combined width is equal to the width of the Fig. 2 is an outside elevation along the line member 6. Said devices are inserted into the 2-2 of Fig. 1. v open mouth of the liner L while the members 1.a Fig. 3 is a sectional View on the .line 3-3 of and lb abut each other. Fig. 1. i shown in Fig. 1, the bottom end of the mem- 20 Fig. 4 is a detail rear elevation of the spreader berv 6 may be of less width than the Vbody theremechanism. of.,s o that said bottom end can readily enter the Fig. 5 is an elevationof .the carton .fand liner, o penfmouthof the liner bag. said liner having been previously lled. When the spreader elements have been inserted machine operates upon thi's device. into theopen mouth of the liner bag, the ymem- 2.

Fig. 6 is a plan view of Fig. 5. bers 1a and -lb are moved away from each other,

Fig. 7 is a, detail elevation, partially in section, as shown in Fig. `8 in order to outwardly bend the showing how the spreaders have entered @the end naps` of the liner bag, and to downwardly mouth of the liner and are resting upon-,the top turn the end flaps 3 and 5 of the carton so that of the body of the carton.j said flaps of the liner bag and carton are ln- 30 Fig. 8 is a plan View of Fig. 7.. :clined to the vert-ical axis of the carton. Said Fig. 9 is a. view which is .Similar` to f1, and members 'la and 1b are moved in a linear direcsaid Fig. 9 shows one ofthe yshoes whichare ilsed tion, that is, they are moved bodily, instead of for closing a flap of the liner. I `being turned varound pivots.

UU Fig. l0 is a plan viewof Fig.;9,:the represe.nta While the spreaders are'held in the position .35 tion of the` shoe having been .omitted in `orderfto shown in Fig. 8, a shoe 8 is moved to the posimore clearly illustrate the .flap has been tion shown in Fig. 9 y.in order to inwardly and bent down by meansof said shoe. l, f downwardlybend vone side of the mouth of rthe Fig. 11 is a detail elevation,v partially in fsec- L and thus form an inner. 4closure flap. ySince 10 tien, showing the operative-position einem shoes. the members 1a and 1b are in their disiending Fig. 12 is a. view similar to Fig. ;11, .the repreposition, this inward bending of a side flap of sentations of the shoes. having' omitted, in the' mouth of the liner bag causes one half of order to more clearly show the flaps. Y. each end flap to be bent inwardly, so as to form r Referring to Figs. *5 and .6., acartbn l is. protriangular-folds in said .end naps, which extend 45 4a vided, and this carton is' made of. 4camlboard -or ,substantially to the central lines of said end flaps. any other suitable material.y This carton .may This inward bending of the vside ap produces .a be of rectangular crossvsecti'onanditis .provided rst closure flap which is perpendicular to the with four end flaps, '2,3, 4 andi.` For convenvcommon axis of the carton and of the liner bag.

0 ience it can be assumed thatlthe carton 'i yis-hel'd Another shoe 9 is then moved against the oppo- 50 with its axis vertical.A L 1 site iwail of the mouthcf the linerbag in order to Fig. 6 shows the flaps 2 and '4in `horizontal inwardly bend the secofnd side ap of the liner position and the 'faps 3 and v"5 fare shown 'in the b'a'g and form asecond vclosure flap which overlaps vertical or upstandingpositin." i the 4first .mentioned closure flap. The shoe 9 also 55 v when trieicartcn.is.:pushedintentie machine, forms triangular folds Yinthe zend flaps, so that .55

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said end aps now have the triangular shapes of Fig. 11.

At a proper time in the movement of the second shoe 9, the spreader elements are withdrawn from the mouth of the bag, and the shoes 8 and 9 nally reach the relative position shown in Fig. 11, so that the second closure iiap is firmly pressed between said shoes.

The shoes 8 and 9 are thenwithdrawn, vthus leaving the liner bag with two overlapping closure aps along the wide edges thereof.

flaps I0 and Ina. Y

The end flaps 3 and 5 of the carton canr now be moved to their closing position and this will simultaneously inwardly bend the flaps I0 and Illa into closing position. The ilaps 2 and 4 are then overlapped in the usual manner over said aps 3 and 5, and the sealing is completed by connecting the flaps 2 and 4 by any suitable "adhesive or the like.

It will be noted that this method of closing the combined container saves several operations `and simplies the mechanism because it is not necessary to inwardly bend the flaps I0 andV Illa. The iinal closing of the ilaps 2, 3, 4, and 5 can be done by any suitable machine.

Referring to Fig. 3, the cartons I are supported upon the upper run of a suitable conveyer belt C which is intermittently actuated by any suit- 'able mechanism.V Said belt C may be provided with suitable means for holding the cartons thereon, so that each intermittent movement of said belt brings a carton into accurate registration with the spreader mechanism and other parts. Such means for holding the cartons and for moving the belt are not illustrated herein as they form no part of the inventionper se.

YReferring to Fig. 4, the spreader' 6 has the shape illustrated therein, and the wide upper end of said spreader 6 is mounted' so as to slide in vertical grooves I I of guides I2. The down- .ward movement of spreader 6 is limited by-stop pins I2a. As shown in Fig. 3, the upper--end of the spreader 6 is provided with a boss I4. `A screw I5'engages this boss I4.V The shank of the screw I5 passes Vthrough a vertical slot in a slide arm I'I. This slot makes it possible to move the arm I'I relative to said screw I5. The iupper end of the arm I'I is provided with a slide `head which slides in vertical grooves provide f'ina guide I8.

The arm I1 is moved up and down by means of a lever I9, one of whose slotted ends is turn- "ably connected to the head of the arm I'I by 'jmeans of a pivot screw 20. Y The lever I9 is pivotally connected to the frame F o f the machine by means of a pivot screw 2|. This screwvengages a rod 2 Ia which is connected to F by a bolt 2lb. Y The outer slottedV end of the lever I9 is turn- Vably connected by means of a screw 22 to a hori- {'zontal rod 23 which passes through and which is connected to the head 24 of a vertically movable rod 25. The rod 25 is slidably mounted in ' bearings 26 and 26a, which are suitably connected to the frame of the machine. t

The tension spring 21 has its lower end connected to the bearing 26a. and its upper end is connected to the pin of acollar 28, which is secured to the rod 25.

'The lower end of the rod 25 is provided with a roller 29, andthe tension spring 21 `causes the .roller 29ste be forced against a cam. 30.

The?? liner bag now has upstanding enclV triangular f theblockv 33b fast to slide arm I1.

Referring to Fig. 4, the spreader element 6 is provided at its rear surface with transverse bars 3|. The screws 32 have their shanks passing through lateral slots which are provided in the spreader elements Ia and 'Ib and the Shanks of said screws are connected to the lateral bars 3|. The heads of said screws 32 are wider than the slots of thespreader elements Ia and 'Ib so that said spreader elements Ia and Ib are guided for lateral sliding movement upon the .adjacent surface of the element 6.

Arms 33 are pivotally connected to the upper ends of the spreader elements 'Ia and 1b by means of pivot members 33a. The screw 34 holds A pivot screw 33e passes through the upper slotted ends of said arms 33, which cross each other, and the shank of'said screw 33e is connected to the vertically movable member II, and to the block 33h, which moves in unison with member II.

Hence, when the member I1 is moved upwardly from the position shown in Fig. 4, said mem- 'ber I1 first has a limited sliding movement relative-to the member I5, and during said limited sliding'm'ovement the toggle arms 33 are turned, soas to laterally slide the members 'Ia and Ib y towards each other.

WhenA said members la and 1b abut each other, the arm I1 simultaneously raises the members 6 and 'la and 1b.

During the downward movement of the arm AQI 1;, there is little orno friction in the movement ofthe member 6,- so that the members 6 and la.

and'lb move downwardly together, without any `lateral movement of the members Ia and 1b.

The stop pins I2a` limit the downward movement of the member 6. Hence, when the downward movement of member 6 is stopped, the further'downward movement of the member I'I.

causes the lateral spreading movement of the "members vIa and 1b, while the slotted lower end of the member I1 moves relative to the screw I5. Referring to Fig. 3, the shoe 8 is provided with lugs 8a to one of which a bell-crank lever 35 is pivotally connected. Said bell-crank lever 35 and a cooperating link 35a, are pivotally mounted upon pins 36 and 54, which are fixed to the vguides I2.

I8 is connected to the frame plate F by means of rods 39 and screws 40.

'I The upper end of the bell crank lever 35 is connected by means of a link 4I to a bell crank lever 42 which is'pivoted upon a pin 43, which is also connected to the adjacent guide I2.

- The link 4I can be connected to the adjacent fends of the levers 35 and 42 by means of ballsocketjoints, Vso as to permit said members 35 and 42 'to move in unison without binding.

The upper end of the bell crank lever 42 is connected by means of a link 44, with the upper -end ofthe bell crank lever 45 which is mounted '-upon a 'pivot member 46 which is suitably secured to a. bracket of the frame plate F.

The lower end of the bell crank lever 45 is -pivotally connected to a link 46a and this is connected by means of a ball and socket connection toa rodx41 having a roller 48 which abuts a cam 49.

The cam 49 is mounted upon and turns in unison with a jack-shaft` 5I! which is provided ,-,Witha sprocket Wheel 5I, which is operated by 75 means of a chain 52. A compression spring 21a, bears against collar 28a of rod 41, so that roller 48 is pressed against cam 49. Rod 41 slides in bearing 41a.

The jack-shaft 50 is thus driven from the main shaft upon which the cam 30 is located. As the shaft 50 is continuously turned in the same direction, the shoe 8 is reciprocated back and forth along a curved path.

Referring to Figs. 1 and 2, the shoe 9 is pivotally mounted at the end of a bell-crank lever 53 and an arm 53a which are turnably mounted on pins 54 and 36.

The bell-crank lever 53 is connected by means of a link 55 to a bell crank lever 56 which is pivotally mounted upon a member 51, which is suitably connected to the adjacent guide I2.

The connection between the link 55 and the levers 53 and 56 may be a ball and socket connection.

The bell-crank lever 56 is connected by means of a link 58 to a bell-crank lever 59, which is pivotally mounted at 60 to a bracket which extends from the frame plate F.

The link 58 passes through a suitable opening in the frame plate F.

The lever 59 is connected to a link 6I and this is pivotally connected to a rod 62, which can slide up and down in a bearing 63 which is connected to the frame plate F.

The tension spring 64 downwardly urges the rod 62 so that the roller 65 abuts the cam 66, which is mounted upon the main shaft S.

The main shaft S has a sprocket 61 over which the chain 52 passes. The main shaft S is driven by a belt B or by any other suitable means.

As shown in Fig. 1, the frame plate F is supported upon a bracket 68, which can be vertically adjusted by means of slots 69 through which suitable clamping members can be passed in order to clamp said bracket 68 to a suitable base.

The entire machine can therefore be adjusted vertically with respect to the conveyer belt C in order to allow for boxes of different heights.

When a carton is located in proper position, the cam 36 first upwardly moves rod 25, so that member I1 is depressed, the spreader elements are moved downwardly until their tapered ends enter the open mouth of the liner bag, and the spreader elements 1a and 1b are then moved laterally, when the element 6 has its shoulder abutting the stop pins I2a. Figs. 1 and 4 show the spreader elements 1a and 1b slid apart to the maximum distance. While this is being done, the flaps 2 and 4 are held horizontal by the rods shown in Fig. 6.

While the spreader elements are thus actuated, the cam 49 causes the actuation of shoe 8, so that said shoe has been moved to the position shown in Fig. 9, when the spreader elements 1a and 1b have reached the position shown in Fig. 10.

However, due to the limited free relative movement between the members I1 and I5, the spreader elements enter the open mouth of the liner, before the shoe 8 substantially forms the flaps in the adjacent side wall of the liner, and in the adjacent end walls of the liner.

The spreader elements 6 and 1a and 1b can be made thin so that the end flaps of the liner L are substantially closed by the formation of triangular sub-flaps therein.

After the shoe 8 has been moved to the operative position which is illustrated in Fig. 9, the cam 66 causes the movement of the shoe of shoe 9.

As shown in Fig. 1, there is a lag of 90 between the cam 39 and the cam 66.

While I have referred to a bag having a rec- 5 tangular cross-section, the invention is not to be limited to any particular shape of bag. Hence, whenever I refer to a bag having a rectangular cross-section in the claims, said claims are not to be limited to the use of a device in connection 10 with this specific type of bag.

Likewise whenever I refer to shoes for inwardly bending certain portions of the mouth of the bag, I desire to include any equivalent means for accomplishing the same general result. l5

As indicated in Fig. 6, the flaps 2 and 4 may be held in horizontal position by suitable rods., while the spreader means and the shoes are operated.

I have shown a preferred embodiment of my 20 invention, but it is clear that numerous changes and omissions can be made without departing from the spirit of my invention.

I claim:

1. For use in closing the open end of a bag, a 25 first spreader element which is adapted to enter said open end, additional spreader elements connected to the first spreader element, said additional spreader elements being laterally movable with respect to each other and with respect to 30 the first spreader element, and means for moving all said spreader elements in unison and for moving said additional spreader elements relative to each other and relative to the first spreader element.

2. For use in closing the open end of a bag, a first spreader element, guide means for guiding the movement of said first spreader element, additional spreader elements connected to said first spreader element, said additional spreader elements being laterally movable with respect to each other and with respect to the first spreader element, an arm for actuating the first spreader element, said arm having a limited movement relative to said first spreader element, and additional arms pivotally connected to said first mentioned arm and to said additional spreader elements.

3. In a device for closing the open end of a bag which has a rectangular cross-section, movable spreading means adapted to enter said mouth and to oppositely spread two of the end flaps of said mouth and to hold the end flaps sides upstanding, folding means adapted to inwardly bend the side flaps of said mouth in overlapping relation and to inwardly bend the corners of said end iiaps, and mechanism for operating said folding means before said spreading means have been moved to inoperative position.

4. A device for closing an open end of a bag, comprising movable spreader means adapted to enter into and downwardly into a bag mouth and spread two end flaps of the mouth of said bag in opposite directions, a movable folding member adapted to inwardly bend a side flap of the end V of said bag and mechanism for moving said spreader means into the end of said bag and for operating said spreader means and for operating said folding member while said spreading means are in the bag and in operative position. 70

PHIL G. SCHLEMMER.

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