US2044879A - Machine for filling and sealing paper bags - Google Patents

Description

June 23, 1936. H EYNQN 2,044,879

MACHINE FOR FILLING AND SEALING PAPER BAGS Filed May 6, 1930 10 Sheets-Sheet 1 6 37 -29 1&3

June 23, 1936. H. G. EYNON. 7

MACHINE FOR FILLING AND SEALING PAPER mes Filed May 6, 1950 10 sheets-sneeze 1' w 11 8 m" l ll ii 71 Z13 90 1&4 1 1 1 1 56 g1 8 o- W ln 51 i 93 97 .71 1 9 p 122 I I M .19 I i 160 1711954 EHII hi1 50 140 m 163 {HP I i b 55 I I 0 I I 1 7/195 June 23, 1936. H, G, EYN N 2,0 4,879

MACHINE FOR FILLING AND SEALING PAPER BAGS Filed May 6, 1950 1o Sheets-Sheet. 5

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June 23, 193 H. G. EYNON MACHINE FOR FILLING AND SEALING PAPER BAGS F iled May 6, 1950 10 Sheets-Sheet 8 Wij June 23, 1936. H. G. EYNON 9 MACHINE FOR FILLING AND SEALING PAPER BAGS Filed May 6, 1950 10k Sheets-Sheet 9 Q a 3 M H m June 23, 1936. H. G. EYNON MACHINE FOR FILLING AND SEALING PAPER BAGS Filed May 6, 1930 10 Sheets-Sheet '10 YIIIIIIIIIIIIIIII Patented June 23, 1936 UNITED STATES PATENT OFFICE MACHINE FOR FILLINGAND SEALING PAPER BAGS Harold G. EynonyPhiladelphia, Pa.

Application May 6, 1930, Serial No. 450,103

55 Claims. (Cl. 226--51) bags, the invention being thought to have its widest application in automatic bag filling machines.

A purpose of my invention is to provide mechanism of the character indicated that is easy and inexpensive to manufacture and well adapted to the needs of service.

I present the paper bags to my mechanism folded flat, presenting one side of the bag up and the bottom of the bag down.

A further purpose is to pick up a flat bag by means of a movable suction member, applying the suction surface of the member to an upwardly directed side of the bag.

A further purpose is to effect a resilient seal between a surface of a bag and a suction member.

A further purpose is to open a folded bag by applying one suction plate to the side and another suction plate to the bottom of the bag and angularly moving one of the plates with respect to the other.

A further purpose is to hold a paper bag open for filling and closing operations by suction plates applied respectively to the bottom of the bag and to an adjacent side thereof.

A further purpose is to move a filled bag from a: filling station to a discharge position by means of a movable suction plate, dropping the bag to discharge by releasing the suction.

A further purpose is to pick up a bag by a suction member applied to one side thereof and to use this plate without releasing its initial hold "for successively opening the bag, for holding'it throughout the operations incident to bag filling and closing and then for bag discharge, effecting discharge by moving the plate so that its suction surface and depending bag are above the point of discharge and then dropping the bag to discharge by releasing the suction.

A further purpose is to use cooperating suction plates for picking up, opening, holding and discharging bags, making one of the plates movable and the other stationary, applying the movable plate to one side of a folded bag, moving the plate 3 to apply the bottom of the bag to the stationary plate and then while the plates are respectively holding one side and the bottom of the bag turning the movable plate with respect to the stationary plate in order to open the bag.

A further purpose is to apply suction to a movable suction plate through a valve opened by the plate and a cooperating stop as the plate moves to pick up a bag.

A further purpose is to provide a desirable orbit of movement for a movable suction plate,

keeping the plate angularlyelevated during its outward movement toward a folded bag then turning the plate downward upon an upwardly directed side of the bag, then giving the plate a rectilinear return movement until the bottom of the bag has been brought to a stationary suction plate, then turning the first suction plate upwardly to open the bag.

A further purpose is to provide a desirable form of valve mechanism for determining the opening and closure of suction to movable and stationary suction plates that are adapted to cooperate in picking up, presenting, opening, holding and discharging bags A further purpose is to turn suction into a movable suction member as it moves to picking position by the engagement of a valve opening member with a suitable stop and to turn it off by a corresponding engagement between a shutoff member and another stop as the member moves into discharging position.

A further purpose is to use a pneumatic cylinder and piston mechanism pivoted upon a transverse axis to effect the variant positioning of a movable suction plate in order to adapt the plate to pick up a flat paper bag, to present the picked bag with its bottom in registry with a stationary suction plate and to'open the bag by cooperative action of the two plates.

A further purpose is to admit the air suction to suction plates respectively carried upon the arms of a turn table through the said supporting arms.

Afurther purpose is to provide each one of a plurality of arms of a turntable with bag picking and holding mechanism that is adapted to receive jarring for settling the contents of a filled bag without transmitting the jarring movement to any material extent to the body of the machine.

A further purpose is to provide a desirable form of automatically engaging and releasing clutch-between a positioning part of a suction member mounted on the head of a turntable and the outer end of an operating piston rod not turning with the table, and that is adapted to move the suction member through an operating cycle when in clutch connection with the said part, and to operate successively upon the suction members of successive heads spaced around the turntable as they are successively in position at the said piston rod.

A further purpose is to mount a piston and cylinder member at the receiving position and a similar member at the discharge position of an intermittent turntable for filling paper bags, providing clutch connection between a positioning part of a movable member for picking up, presenting and opening the bag and the ends of the piston rods adapted to automatically connect when the heads successively come to rest at the piston and cylinder members and to automatically release as the turntable moves on.

A further purpose is to operatively connect a movable bag-picking, bag-presenting and bagholding member with the piston rod of a transversely pivoted pneumatic cylinder to effect an arcuate movement of the cylinder member during a forward stroke of the piston and to use this arcuate movement to reverse the piston, thereby adapting the piston to reciprocate once back and forth along the cylinder each time the air is applied to the cylinder, in order to move the picking, presenting and holding member throughout its cycle each time the air is applied to the cylinder.

Fur-.her purposes will appear in the specifica tion and in the claims.

I have elected to show one only of the many forms of my invention, selecting a form that is practical and eificient in operation and which well illustrates the principles involved.

Figures 1, 2 and 3 are diagrammatic views illustrating broadly my method of picking up the ba presenting it, opening it and holding it for the filling operations.

Figure 4 is a diagrammatic view illustrating a turntable to which my invention is well adapted to be applied.

Figure 5 is a side elevation of a portion of the turntable shown diagrammatically in Figure 4, showing one of five similarhead-and-arm units spaced around the table and that come to rest successively at the positions I to 5 of Figure 4, the view showing one of the head-and-arm units at number I position of Figure 4, which is the position for picking up, presenting and opening the successive bags.

Figure 6 is a sectional top plan of Figure 5, the section being taken on the line 85 of Figure 5.

Figure 7 is an enlarged side elevation of a portion of Figure 5, modified however in a minor detail.

Figure "la is a fragmentary vertical central section of one of the valve mechanisms seen in elevation in Figure 7, certain structure being broken away.

Figure 7b is a section taken on the line lb-4b of Figure Ia.

Figure 8 is a sectional elevation of Figure '1, showing the travelling vacuum plate in the picking position.

Figure 9 is a top plan view of Figure 8.

Figure 9a is a detail of Figure 9.

Figure 10 is a sectional plan view of the structure of Figure 9.

Figure 10a is a fragmentary partially sectioned view corresponding to a portion of Figure 10 but illustrating a detail of the structure shown in Figures 5 and 6, not used in the form of Figures '7 to 10.

Figure 11 is an enlarged side elevation of part of Figure 5, comprising mechanism that does not rotate with the turntable.

Figure 12 is a section along the line |2-| 2 of Figure 11, with the cylinder however turned transversely to its supporting tubular fork and the view illustrating the supporting and feeding means for the structure of Figure 11.

Figure 13 is a section of Figure 12 on the line |3|3.

Figure 14 is an end elevation of Figure 13 showing valve resetting mechanism.

Figure 15 is a fragmentary bottom elevation,

.engagement with the box 26.

part section, corresponding to a portion of Figure 13 but with the valve mechanism in reverse position from that of Figure 13.

Figures 16 to 21 inclusive are views showing the orbits of characteristic points of mechanism embodying a desirable form of an important portion of my invention.

Figure 22 is a plan view showing a desirable form of face for the movable suction member.

Figure 23 is a section taken upon the line 23-- 23 of Figure '22.

Figure 24 is a plan view of a desirable form of face for my fixed suction member.

Figure 25 is a section taken upon the line 25- 25 of Figure 24.

Like numerals refer to like parts in all figures.

Describing in illustration and not in limita-' tion and referring to the drawings:-

It is believed that the present invention will find its widest application with automatic machines for filling paper bags, to be applied upon the duplicate heads of an intermittent turntable, each head of the turntable successively picking up a bag, presenting it, opening it and holding it for filling, jarring, closing and final discharge, the heads operating one after. the other through the same cycle of operations upon successive bags, the mechanisms for carrying out different phases of the cycle being placed adjacent the different rest positions of the heads.

Nevertheless the invention is of wider application, being well adapted to use elsewhere than on turntables, and I have therefore so illustrated it in Figures 1 to 3, whereI omit parts special to turntable structure and endeavor to indicate broadly my method of picking up a bag, of presenting it, of opening it, of holding it for operations incident to filling and closing, and of discharging the filled and closed bag.

Referring to Figures 1 to 3, I use movable and stationary suction boxes 25 and 26 and a bag supporting tongue 21, a flat bag 28 being supported on the tongue with one side 29 up and the bottom 30 of the bag down.

I move the box .25 from an elevated position, as

that shown in Figure 1, along the path indicated by the arrows, to the dot-and-dash position of Figure 1, thereby applying its suction face 3| to the upwardly directed side 29 of the bag, securing firm suction connection between the side 29 of the bag and the face 3| of the suction box.

Y Desirably the suction face 3| engages the full width of the side 29 of the bag from its normally bottom edge 32 upwardly along the side as far as is consistent with non-interference with closing operations.

From the position shown in dot-and-dash in Figure 1, I move the suction box 25 in the direction of the arrows of Figure 2 to the position shown in full line in Figure 2, the movement being preferably parallel to the plane of the fiat bag until the bottom of the bag'is over the suction face 34 of the stationary suction box 26. In this approximate position of the bag 28 is brought into I prefer not to effect this engagement by the movement of the bag parallel to the face of the box 25 because I desire to use relative movement of the bag and the box 26 perpendicular to the suction face on the box as a means of turning on the suction.

I now turn the movable suction box 25 angularly upward about the edge 32 of the bag, as indicated by the arrows 35 of Figure 3, from its position shown in full line in Figure 2 and in 75 dot-and-dash at 36 in Figure 3, to the position shown in full line, Figure 3.

During this movement the bag 28 opens, as throughout the movement the bottom 30 is held against the upward face of the stationary box 26, while the side 29 of the bag has suction conbe accomplished in any suitable way, by hand or by mechanism, as desired.

In discharging the filled bag, I release the suction under the bottom of the bag and thenf outwardly move the box 25 along the same path as indicated by the arrows of Figure 1 or the arrows 31 of Figure 3, the box 25 carrying the bag outwardly and dropping it as it reaches the position shown'in dot-and-dash at 33, Figure 3,.by releasing the suction back of the plate 3|.

Discharge takes place without interference from the charging tongue member 21 which has been moved out of the way.

When applied to a turntable, the discharge position takes place at a diiferent point from the picking up, presenting and opening positions of the bag, and suitable discharge chutes may be provided to carry the filled bags to any desired receptacle. I

Since the widest application of my invention is believed to be upon the head-and-arm units of an intermittent turntable, and since that turntable mechanism in itself is well known and therefore irrelevant to the present invention, I

. show in Figure 4 what is intended for a conventional illustration of any turntable adapted to receive mechanism embodying my invention.

In this figure the centralportionincludes stationary and intermittently rotating structures 4|! and 4| and five arms 42 extendingoutwardly paratus, and I make the arms 42 that extend to While the filling and jarring of the bag will in practice almost invariably be done by automatic mechanism, all of these operations may optionally be effected by hand.

Figures 5 and 6 are fragmentary elevation and sectional plan views showing part of the turn table and one of the arm-and-head units, the other arm-and-head units being desirably the same as that shown in Figures 5 and 6 so that description of one arm and head may be considered to apply to all.

I provide the turntable with an interior sue-- tion chamber 46. to which I apply continuous suction, as by connecting it to suitable suction epthe different heads hollow conduits for transmitting suction to the boxes 25 and 26 (Figures 5 and 8).

I vertically bore the outer end 41 of each arm through the hollow 48 thereof to receive The head is thus carried by the shank 49, which is surrounded by the hollow interior of the a m and ported at 59 into the hollow of the arm, admitting into the interior of the shank continuous from the rotating structure and carrying heads l 43 that have details embodying important-features of my invention.

A head at position I picks up a bag, presents it,

opens it and holds it throughout subsequent positions of the head until the bag has been filled, jarred and closed by operations taking place while the head is at positions 2 and 4 and finally discharges the filled and closed bag when the head is in position 5.

Each head includes cooperating suction boxes and 26 as in Figures 1 to 3, the movable box being moved through its cycle by a pneumatic engine 44 when picking up, presenting and opening the bag while the head is at position I, anu by a pneumatic engine 45 when discharging the filled bag while the head is in position 5.

The pneumatic engines 44 and 45 are suspended from the stationary structure 40 of the turntable, are alike, and each adapted to automatically connect and disconnect with mechanism on the head for moving the suction box 25 throughout its prescribed path of movement.

The shank carries an outwardly directed flange 5| above and a threaded portion 52 below the end of the arm, the head being clamped to place against the upper and lower heavy rubber washers 53 and 54 above and below the end of the arm by tightening a suitable nut 55 at the lower end of the shank (best seen in Figures 5, 7 and 8).

By means of the rubber washers 53 and 54 and rubber packing rings 56 (Figure 8), I very effectively insulate the heads from receiving lin due vibration incident to the jarrring of one of the heads at one of the rest positions during each period of rest of the turntable, at the same time sealing the joint against leakage of air.

A plug 51 at the lower end of the shank member 49 provides a convenient point of appl cation of jarring impacts which may be effectczl by suitable jarring mechanism or by hand.

The purpose of the jarring is to cause a settling of the material charged into the bag, and one or the heads will always be under jarring during each rest period of the turntable.

The hollow shank 49 is shown as an integral portion of a two compartment box 58 (Figure 8), of which the hollow shank forms one compartment and the stationary suction chamber 26 (Figures 1 to 3 and 8) the other, the space inside the 5. hollow shank being always under suction, while the interior of the compartment 26 is alternately under suction or at atmospheric pressure according to the setting of a valve 59 inside the chamber 25 (Figures 8 and 10). l

The compartments 26 and 49 have respectively lower and upper portions that are on opposite sides of a vertical wall 69 which is ported at the valve 59, and perpendicular toa radius of the turntable through the valve.

Preferably the stem 6| operates longitudinally in a direction substantially radial of the turntable axis, the valve member 59 being inside the compartment 26, with an inward position, that of Figures 8 and 10, at which it closes the port 62 to the compartment 49, leaving open a port 63 to atmosphere, and an outer position, that of Figure 7a, in which the stem and valve have been moved radially outward to close the port 63 to atmosphere and open the suction port 62.

The suction compartment 49 has side openings at 64 and 65 (Figures '7 to 10) into sets of intermediately hinged pipings 66 and 61 that connect into opposite sides of a compartment 68 back of and integral with the movable suction compartment 25, with which it has valve connection at 69, Figures 8 and 10.

The sets of pipe connections between the movable and stationary suction compartments 49 and 68 have suitable hinge connections at I0 adapting the two-compartment box I l, which includes the compartments 25 and 68, to move along its desired path without interrupting the continuous suction applied to the chamber 68, or the continuous suction in the chamber 25 except as such movement is used to open and close the valve 69 between the compartments 25 and 68.

Detail features of my invention include desirable forms of valve connections controlling the holding suctions inside the compartments 25 and 26, whereby the suction is admitted to the compartment 25 as its suction face reaches picking position, admitted to the compartment 26 as the bottom of the bag is being presented to the plate 34 preparatory to opening the bag, released in the compartment 26 after the bag has been filled and closed preparatory to discharge of the filled and closed bag, and released in the compartment 25 to effect final discharge by dropping the bag from the downwardly directed extended face 3|.

The valve mechanism controlling the suction in the compartment 26 under the stationary suction plate is shown in Figures 5, 6, '7, 7a, 8 and 10.

As best seen in Figures 7a and 8, the horizontal valve stem 6|, extending radially of the turntable axis, carries inside the compartment 26 a fibervalve 59 which closes alternatively the radially spaced ports 62 and 63, respectively, to the compartment 49 and to atmosphere.

The stem is guided at 12 and 13, the outer guide comprising inner walls'of the port 63 and a non-circular enlargement 14 of the stem.

The stem at its inner position presents the inner side of the valve against the port 62 and in its outer position presents its outer side against the port 63, the plate 34 being in the two cases respectively without and with suction.

When in its inward position (Figure 8), the compartment under the stationary suction plate is open to atmosphere and closed from the suction compartment 49, while when the valve stem is moved into its outer position (Figure 7a) the reverse is true, the atmospheric port being closed and the chamber being under suction through the port 62 from the compartment 49.

In usual practice the compartment 26 under the suction plate 34 will be under continuous suction (Figure 7a) from the time the bottom of the bag is presented to the suction plate until the bag has been opened, filled, jarred and closed and is ready for discharge. The valve is then moved inward to the position shown in Figure 8, which instantly releases the suction under the plate and permits the bag to be readily moved away by the upper suction plate, which at this time is still under suction.

The valve stem 6| is provided with longitudinally spaced inwardly and outwardly directed shoulders 15 and 16 (Figure 10) and outer and inner sliding sleeve I! and 18 intermediate the shoulders.

The inner sleeve 18 carries laterally extending rods 19 and 80, Figure 10.

Swivel heads 8| at the outer ends of these rods are pivoted loosely at 82 to rocker members 83 (Figures 5, '7 and 10) and 84 (Figures 8 and 10) at opposite sides of the casing.

The rocker members 83 and 84 on each side are alike, each having a fixed pivot at 85, and a loose connection at 82 to the respective swivel head 8!. The upwardly extending arm 86 from each rocker (Figure '7) is pivotally secured to one the links 81 (Figures 5 to 9, which in turn is connected to a bell crank 88, best seen in Figure 7a. The bell crank 88 is in position to be engaged and moved by the movable suction member as it moves to bag-presenting position.

The bell crank rockers 88 are alike, each being pivoted at 88, and having an arm 89 connected to the links 81 and an arm 89 extending at right angles thereto (Figure 7a).

The inner arm 89' is in position to be engaged and deflected when the lower wheels 99 of the upper suction member 25 move to the position shown in Figure '7, the deflection of the arm 69 moving the valve to close the compartment 26 to atmosphere and to open it to suction (Figures 5 and 'I to 10).

In Figure 8 the inner arm 89 of the rocker member is shown extending upwardly in position to be deflected downwardly when the wheel 60 of the upper suction member follows the depression 9| at the rear end of its guideway 92.

I provide means for maintaining the valve stem 6! spring pressed to position, whether this position is upon the port 62 or the port 63.

This mechanism for effecting resilient pressure tending to close the valve at whichever port the valve is seated includes (Figure 8) the slidable sleeve 11, upper and lower links 93 and 94 from top and bottom portions of the sleeve transverse and laterally projecting pins 95 and 96 respectively at the upper end of the link 93 and at the lower end of the link 94, pins 95 and 96 being adapted to slide in vertical guideways 91 and 98 for the projecting portions of the pins and strong tension springs 99 and I0!) between the vertically spaced pin projections. 9

The pins press together in the horizontally spaced Vertical guideways, tending to force the vertically spaced ends of the links 93 and 94 together and thereby pressing the sleeve 18 outward or inward according to the slope of the links, which reverses at midposition of the sleeve.

The links and sleeve are given dimensions adapting them to pass between the vertical guide members 97 and 98.

Thus, as seen in Figures 7, 7a and 7b, the links have passed their midposition and tend to hold the valve against the seat 63, while in Figure 8 the links are on the opposite side of their midposition, and tend to press the valve toward the seat 62.

When the wheels depress the member 89, the movement is transmitted through the links 81, and the rockers 83 and 84, to the sleeve 18, moving the sleeve along the valve stem 6| against the retractive pressure of the sleeve 11 until the links 93 and 94 reach and pass the vertical sleeve TI, at which time the sleeve 17 snaps forward and reverses the position of the valve by its engagement with the inward shoulder E5 of a knob l0! on the outer end of the valve stem.

The suction is turned off and the connection is open to atmosphere when the turntable moves the head to position 5, Figure 4, across the wedge surface of a suitable stationary wedge member I82, which deflects the knob llll radially inward to a point that reverses the slope of the links 93 and 94, the lower ends of these links and the sleeve I1 connected thereto. The sleeve 1'! then 'fiies inward along the stem, engaging the outer arm of the sleeve 18, and pushing this sleeve against the shoulder 15, thereby pushing the valve stem inward until the valve engages and closes the port 62, with the valve stem horizontally continuously pressing the valve home against the port 62 to maintain atmospheric pressure inside the compartment 26 under the stationary suction plate.

The valve mechanism between the compartments 68 and 2510! the movable suction box is best seen in Figures 5 to 10. i

The valve 69 is mounted inside the compartment 25 upon a longitudinally movable stem I03 which is guided at I04 and I05 to alternatively close a port I06 into the compartment 68 or a port I01 to atmosphere. The valve, its ports, and the inner portion of the valve stem are all generally like the corresponding members of the compartments 26 and 49 already described.

In Figure 10 the fiber valve members 69 are shown closing the port I01 to atmosphere but are adapted to move to the right to close the suction port I06 with an opening of the compartment 25 to atmosphere through the port I 01.

The outer end of the valve stem I03 has connection at I08 with an operating member I09. The connection I08 is shown as a pivot connection, but except for purposes of manufacture the operating member I 09 might be integral with the stem I03.

The operating member is provided with a loose slot and pin connection IIO (Figure 9a) to one arm of a rocker I I I'fiwhlch is pivotally supported at H2 and has at its other end a loose slot and pin connection II3 with an auxiliary operating member II4.

The pins of the connections H0 and H3 may desirably comprise rigid portions of the rocker member, the slots at these connections in the members I09 and H4 respectively permitting an arcuate movement of the rocker to either side of a midposition transverse to the valve stem and t6 the operating members I09 and I I4.

A spring H5 connected at one end to an outer end of the rocker arm, as to the pin at the connectlon H0, is anchored at its other end to the casing structure at a point, II6 alined with the pivot of the rocker member and the other end of the spring when the rocker is in its desired midposition, so that when the valve stem is positioned beyond its midposition it is spring pulled to move further away from its midposition.

The valve is thus spring pulled to closure when it is closing the port I0'I to atmosphere and also spring pressed to closure when it is closing the port I06 to the suction compartment 68.

It will be seen that the operating members Hi9 and H4 move in and out in reverse directions, either moving in while the other is moving out, and vice versa, and that the valve may always be reversed by pushing inward on one of the operating members.

I preferably eifect the reversals by the use of suitable stationary wedge members I I1 (diagrammatically illustrated in Figure 4) of which one only has been shown (Figures 8, 9 and 10).

One of these reversing wedge surfaces engages and pushes the knob end of the member H4 as the movable suction box moves into picking position, and the other engages and pushes inward the knob end of the member I09 as the box moves into its discharge position.

There are thus two stationary wedge members,

one for each of the operating members I09 and H4. The first pushes the member I09 inward to effect discharge of the filled andclosed bag at the fifth position of rest of the turntable (Figure 4 and the second pushes the member I I4 inward at the picking position, which is the first 'position of the turntable.

These wedges may be exactly alike with the single exception that they are placed at different angular positions of the turntable to engage different operating members, I09 and H4 respectively. Each pushes its member inwardly a distance sufficient to reverse the valve, in the one case to shut off a suction hold on the filled bag and in the other case to apply suction inside the holding member in order to effect picking.

The two compartment movable suction box II is supported by upper and lower pairs of wheels H8 and that roll on upper and lower tracks H9 and 92 of stationary vertical side pieces I20 and I2I that are similar and supported from the top of the two compartment stationary box 58.

The lower wheels 90 move back and forth along the spaced tracks or guideways 92 on the two except for the depressions 9|. The forward and retracting movements take place along the same path.

' side pieces, the path being straight and horizontal face directed downward in position to carry the picked bag rearward while holding it horizontal, soas to present the bottom of the folded bag horizontally downward upon the horizontal stationary suction face 34.

The track or guideway for the upper wheels thus includes upper and lower portions, the upper track comprising gate members I22 which are pivoted at I23 and rest to the right of their pivots (Figure '7) upon stationary webs I24 that form a portion of the lower guideway.

The right ends of the gate rails I22 are engaged underneath and lifted by the wheel II8 as the suction member II is moving to the position of Figure 5 in opening the bag, the ends of the rails latching back to such a position that the wheel II8 must travelon top of the rails when it next moves outward.

During its outward movement from the posl tion shown in full line Figure '7, the suction member II moves forward with its face 3I vertical until the lower wheel 90 reaches the position I25 at the end of its forward travel, the upper wheels II8 during this movement rolling horizontally along the rails I22 to the position I20.

After the lower wheels come to rest at I25 the member II swings outward to the left in an are about the axis of the lower wheels to come ul- 0 The path of the wheels IIB between the posi- 7 tions I26 and I2! is indicated by the dotted lines I33 and I34 (Figure 7),the members I22 and I32 being deflected by the wheels II8 respectively to the dot-and-dash positions I35 and I36 and dropping back to the full line positions of Figure 7 when the wheels II8 reach the position I21.

During the return movement of the movable suction plate the suction face of the member H is horizontal, the wheels H8 rolling to the right along the rail I28, the guideway surfaces I29, I30 and I3I over the wheel insuring that the wheel travels back horizontally. The surface I3I guides the wheel downward into a depressed portion I31 of the track, the tracks of both wheelsbeing correspondingly depressed at I31 and 9I for presentation of the bottom of the picked bag upon the stationary suction face 34, and the downward movement of the suction member being desirably used to turn the suction valve into the space beneath the stationary suction plate.

After the lower pair of wheels enters the depressions 9| at the inward end of the guideway 92, the upper suction member 1I turns upward about the axis of the lower wheels, the folded bag having been placed so that the bottom edge 32 of the upturned side is coincident with this axis. The upper wheel moves along the arc I38, Figure '7, to the full line position, this movement efiecting opening of the bag as indicated in Figure 5. The arc 538 is limited by the action of the stop I39 against the side 01' the movable suction member II.

The cycle of movements oi. the movable suction member 1i takes place when the turntable is in its first position of rest to effect picking, presenting, opening and holding of a new bag and again when the same head reaches its last position of rest to effect discharge of the filled and closed bag, and these movements may be accomplished in each case by hand or by suitable mechanism, for example, by means of the pneumatic engines 44 and 45 shown in Figure 4.

In Figures '7 to 10 I have indicated no specific connection between the pneumatic engine and the movable air box 1 I, intending to indicate that any suitable form of connection might be used or that the box might be moved by hand instead of by any form of engine.

I move the upper suction member .'I preferably by force applied at the axis of the hinge 10 in the pipe connections 66 and 61 between the compartments 49 and 11. In Figure 10a I show a desirable form 01. hinge connection 10 that includes an annular surface I40 suited for easy and automatic connection and disconnection with the clutches I4I of the pneumatic engines 44 and 45.

The intermediately hinged conduit connections illustrated in Figure 10a between the suction compartments 49 and 68 includes the tubular hub I40, counterpart pipe members I42 and I43 that make spring-pressed wiping connection at I44 with the chamber 68, other counterpart pipe members I45 and I46 making spring-pressed wiping connection at I41 with the compartment 49 at 64 and 65, and a hinge axle member I48 that definitely alines the difierent tubular portions at the hinge axis.

The hub I40 having its maximum diameter at I49 receives the transversely directed open ends I50 of the pipe members I42 and I43, which in turn engage the open ends I5I of the pipe members I45 and I46.

The members are held together along their pivotal axis by the axle member I48 which has a guiding section at I52 and I53 through the hinge portions of the outer members, made non-circular in order to secure conduit connection between the pipe members.

The axle has threaded end shanks I54 which receive conical washers I55 held to place by nuts I56, desirably using suitable spring washers I51 under the nuts in order to secure resilient clamping together of the members along the hinge axis. 5

It will be seen that the spring unions I44 spring press the transverse ends I50 of the pipes I42 and I43 upon the opposite ends of the hub member to maintain a tight contact against the bevelled ends of the hub member, and that in the same way the spring unions I41 not only press the engaging surfaces to closure at the ports 64 and 65, but also press the transverse ends of the pipes I45 and I46 inwardly into the transverse ends of the pipes I42 and I43, thus holding the 5 members compressed together along the hinge The tightness of the seal at the hinge axis is desirably increased by the spring washer members I51 under the nuts I56. 2

Details of a desirable form of the pneumaticengine, 44 or 45, are illustrated in Figures 11 to 15. The same structure is shown generally in Figures 5 and 6. The engines are preferably operated by air pressure or air suction, being illus- 25 trated as operated by air suction.

The engine 44 or 45 has a horizontal pivot support at I between the lower ends of downwardly extending forking arms I6I and I62 of a stationary hollow L member I 63, suction connec- 30 tion to the engine being effected through the conduit members from a suction compartment I64 inside the body of the turntable.

The conduit L member 563 is bolted at I65 to the stationary outer wall of the turntable cas- 35 ing structure, and carries the downwardly depending L branches I BI and I62 at its lower end which support opposite sides of the engine as best seen in Figures 5, 6 and 11 to 13.

A piston 166 is adapted to travel back and forth 40 along a cylinder I 61, the clutch I4I being carried at the projecting end of the piston rod I68, the clutch member being adapted to receive the hub I40 as the turntable comes to rest, and the desired cycle of fnovement of the suction box being effected after the turntable comes to rest by a back and forth movement of the piston and through the clutch and hub members I4I and I40.

Outwardly enlarged end portions I69 and I10 of the cylinder are provided at horizontally op- 50 posite sides with alined lugs HI and in which are bored to receive pipe members I13 and I14 that form a casing for piston valves I15 and I16 mounted upon suitable stems I11 and I18 for controlling the admission of suction to opposite ends of the cylinder.

Ports are provided at I19 and I between the interior of the pipe members I13 and I14 and the ends of the cylinder, and also at I8I and I82 from the interior of the pipes I13 and I14 out- (39 ward along the pivotal axis of the cylinder through head portions I83 and I84 of an inverted saddle member I85 that supports the cylinder by gripping the pipes I13 and'I14.

The ports I8I and I82 open into the spherical 65 open ends of nipples I86 that are carried by and connect into the lower ends of the suction conduit L connections I6I and I62. Lock nuts I81 retain the threaded nipples in position.

The cylinder is also provided with alined lugs 70 I88 which carry a tube I89 into which telescopes a rod I90 mounted upon an inwardly projecting arm I9I of the clutch I4I to maintain the clutch member in unchanged alinement throughout the movements of the piston.

The cylinder is thus carried by the inverted saddle I95 at the middle of the tubes I13 and I14 (Figures 12 and 13), the cylinder pivoting in a vertical plane radial of the turntable about the axis of the horizontal suction nipples I86 which maintain continuous suction inside the pipes I13 and I14 intermediate the piston valves thereof. The piston is adapted to travel in either direction according to the setting of the piston valves I15 and I15 as determined by the longitudinal setting of the valve stems I11 and I18.

The valve stems I11 and I18 have slot and pin operative connections at I92 and I93 respectively with duplicate rockers I94 and I95.

The rockers I94 and I95 have a common pivot support on a pin I96 that is in turn carried between spaced lugs I91 and. I98 of a plug I99 in one end of the cylinder.

The rockers I94 and I95 have inwardly extending toes 200 (Figure 15). which are adapted to stop against an outwardly directed surface of the plug I99 when the rockers are in the position shown in Figure 13. In this position suction is admitted into the left end of the cylinder in order to start the piston on its operating cycle-first to the left from the position of Figure 13, with a subsequent return incident to an automatic reversal of the rockers I94 and I95.

The rockers I94 and I95 respectively carry transversely extending rods MI and 202 (Figure 14) which are rigidly fastened to-the respective rockers and connected at their outer ends by strong springs 203.

'The springs 203 pull the pin portions 20I and 202 of the rockers toward one another, which tends to move the rockers one way or the other according to whether the pins are both to the left or both to the right of the rocker pivot I96. Therefore the rockers are pulled to the left when they are in the position of Figure 13 and to the right when they are in the position of Figure 15.

Each of the rockers I94 and I95 gives loose pivot support to one end of a bow-shaped mount 204 of an outwardly presented roller 205 for use in reversing the rockers from the position of Figure 15 to that of Figure 13.

The mount 204 comprises duplicate bow-shaped pieces loosely pivoted at one end on the-pin 20I and at the other end on the pin 202 slotted about one or both of the pins, as at 206 to permit the requisite arcuate movement of the rockers.

The roller 205 is carried at the middle of the bow on a suitable pin 201. It is presented in the path of wedge members 208 (Figures 5 and 11) that are mounted on the turntable in position to successively engage and inwardly deflect the roller from the position indicated in Figure 15 to that shown in Figure 13 each time the table in its receiving position, position I of Figure 4.

The result of reversing the valve positions from that shown in Figure 15 to that shown in Figure 13 is to make the piston move to the left from its position in Figure 13 until an accompanying arcuate movement of the cylinder about its pivot I60 effects a reversal of the rockers I94 and I as the suction box II reaches picking or discharge position, thereby returning the piston to its original position, that of Figure 15.

As the piston moves to the left, extending its rod and moving the suction member II to the left, the cylinder has an accompanying arcuate movement about its pivotal axis as indicated in Figures 16 to 21 respectively, a stationary wedge l outer end of its stroke. i

g In Figures 7 and 8 I show straight pipe sections 2I2 between the hinges I0 and the suction compartment 68.

Ordinarily the pipes 2I2 will be straight or bent, according to the character of connection made with the outer end of the operating member. With the clutch connection shown in Figures 5, 6, 10a and 11 it is preferable toprovide a bend in the pipes 2 I2 at 2 I3, adjacent the hinge connection, in order to provide easy clearance between these pipes and the clutches I4I.

Each clutch- MI is angularly stationary with respect to the turntable While each head carries a transverse hub member I40 at the hinge I0, to be received in and clamped by the clutches MI 3 on the piston rods of the cylinders 44 and 45.

The spring clutch members I4I are placed in register with the common orbit of the hub memhers I 40 so that these members travel successively into the clutches I4I, one of the hub members having operative connection with each clutch during each rest period of the table, to move on out of the clutch at the next forward movement of the table.

In Figures 16 to 21 I show the relative positions of the cylinder 44, of the movable suction member II and of the intermediate connections at the difierent stages of the operating cycle, showing in dot-and-dash lines on each figure the determinant paths of movement of different parts of the mechanism.

The lines abcdefa, aibicidieihai, azbzczdzezfzaz, aabacadaesfsaa respectively indicate the paths of movement of the axis of the upper wheels IIB, of the axis of the lower wheels 90, of the axis of the hub I 40, and (to indicate the arcuate movement of the cylinder) of a point on the rearwardly extended end of the piston rod.

- Corresponding letters on the different lines indicate corresponding points of the difierent parts at the same stages of the cycle, the stages being indicated respectively by the letters a, b, c, d, e, and j.

Figure 16 indicates the movable parts in the a position, the movable suction member being in the position that it occupies after the baghas been picked, presented to the stationary suction plate and opened, and in which the bag as the head progresses around its orbit remains open as indicated at 2I5 while it is filled and jarred,

being then closed as indicated at 2H5. The shift to the position of Figure 17 takes place when the turntable carries the head into position 5 (Figure 4) preparatory to discharge.

As the head is brought into the discharge posi-- tion the suction member is raised out of the depression 9| by the engagement between the valve knob lol and the stationary wedge I02, Figure 4, in order to shut off the suction from the stationary plate and to admit air beneath this plate.

The parts are then in the b position, as indicated in Figure 17, ready for discharge, the suction in the cylinder 45 having just been reversed by an engagement between one of the wedge members 208 with the roller 205 (Figures 5, 13 and 15).

In Figure 18 the parts have progressed to the position, the movable suction box H having been moved by the advancing piston horizontally to the left with the suction face '3I 0f the box vertical until the lower wheel comes to rest at the point 01, the moving upper wheel being shown at the point 0 about to travel along the arc ed.

In Figure 19 continued advancement of the piston has moved the upper wheels of the movable suction member along the arc cd until they have come momentarily to rest at d with the suction face horizontally downward in discharge position.

The final downward movement of the box It has released the filled bag from the plate 3| by an engagement between the valve operating member H4 and a stationary wedge H1, Figures 9 and 10, and the accompanying arcuate movement of the cylinder 45 has by means of the cooperating wedge 209 (Figure and rockers I94 and H35 (Figures 13 and reversed the suction in the cylinder.

The bag is indicated in dot as still adjacent the suction plate, but is free from the suction plate and falling away for delivery to any desired receptacle through a suitable chute not shown.

Figure 20 shows the parts in the position e, the piston having retracted the parts from the positions shownin Figure 19. The suction face 3! has during retraction remained horizontal, the lower wheel 90 having come to a position at the right end of its path preparatory to moving down into the depression 9|, while the..upper wheels are shown about to move correspondingly downward along ef.

Figure 21 shows the positions after the movable suction plate has moved downward, this small downward movement being used to turn suction into the stationary suction plate.

The next position will correspond to that shown in Figure 16 except that there will be no bag present, the cycle of Figures 16 to 21 repeating when the turntable comes to position I, at which the mechanism picks up, presents and opens another bag.

It will be understood that the point 0 represents the pivotal axis of the cylinder.

The engines 44 and 45 at positions I and 5 may be exactly alike and for this reason it is sufficient to show part of the cycle on one of these cylinders and the remainder on the other cylinder.

In the previous figures I have indicated that the movable and fixed suction plates may have perforated metallic surfaces to come in contact with the bags.

I regard the form shown in the early figures as diagrammatic rather than particularly desirable for the several reasons that the metal contacts with the bag permit excessive leakage; that the suction applied at the center of the plate (i. e., to the center of the bag) is not desirable on ac count of leakage through the bottom of the bag and because the openings nearest the axis about which the movable suction plate swings act on so short a leverage as not to be fully affective.

For these several reasons in practical oncommercial operation I plan to use resilient sealing edges for contact with the bag to prevent eX- 5 cessive leakage of air between the bags and the suction plates, so as not to require the pumping of excessive leakage air to maintain the vacuum; to avoid application of the vacuum at the middle of the bag and to apply the vacuum where its 10 hold will have the greatest leverage with respect to the axis about which the movable vacuum/ plate turns. I find it preferable in practice to use resilient sealing edges to prevent excessive leakage of air between the bags and the suction l5 plates.

In the form of Figures 22 to 25, a sealing edge between the bag and the plate greatly reduces the air leakage, so that the vacuum need not be so high as in the form of Figures 1 to 10.

The movable suction plate 25, seen in Figures 22 and 23, consists of a suction face 2! having perforations 2 l 5 opening into the suction box, and an edge plate 2 I 6 held by screws 2 H. A resilient sealing sheet 2| 8, preferably of rubber or similar 25 material, is held between the suction face 2M and the edge plate 216 in a depression 2H3 extending around the suction plate. The sealing sheet is upwardly pressed at 220 by the shoulders 22l extending around the suction plate near to the inner edge of the sheet.

Thus it will be seen that a bag placed in contact with the movable suction member will be drawn in against the suction face 2 Id at the center, and upwardly bent at 220 by the resilient sheet. The sheet will itself move inwardly to a variant extent depending upon the pressure applied to it, and will therefore compensate for any irregularities in the surface of the bag, as for example the lumps produced by seams and folds.

The fixed suction member 26 is shown in Figures 24 and 25. The suction face 222 is united to the guard 223, covering most of the face, by the screws 224. Between the face and the resilient e sealing guard a sheet 225 preferably of rubber or similar material, is held firmly, so that it will curl at 226 due to the effect of the pressure. The curled inner edges 226 of the sheet lie directly above the perforations 221 in the suction face.

It will be noted that the resilient seal and the perforations in the fixed suction plate are intended to register with only a small portion of the bottom of the bag at a position considerably removed from the axis of opening of the bag, so that the lever arm by which the bottom is held will be a maximum. The suction is not desirably applied to the entire bottom surface of the bag because of its extreme irregularity and because frequently the gluing and folding are sufficiently imperfect so that openings exist from the bottom into the interior of the bag. Where this is the case, suction from the stationary suction face will be admitted to the interior and will tend to oppose the action of the movable suction plate in opening the bag. (if

It would of course be possible to place the perforations at any point desired over the suction plate, but I prefer to place them at that point on the plate near to the edge of the bag farthest removed from the axis of turning about which the bag is opened. Separate suction openings might of course be placed at other points on the suction face.

The resilient edge 226 of the sheet will tend to compensate for the irregularities of the bottom side and end and in moving the side ,angularly of the bag, effecting a much more perfect suction seal than would be possible with a metallicsuction face only. v

In Figure 24 the nob I39 is extended straight out from the suction plate, instead of at an angle as is the nob [39 (Figure 8). is desirable in some machines.

In view of my invention and disclosure variations and modifications to meet individual whim or particular need. will doubtless become evident to. others skilled in the art, toobtain all or'pa'rt of the benefits of my invention without copying the structure shown, and I, therefore, claim all such in so far as they fall within the reasonable spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to. secure by Letters Patent is:-- l

1 The method of opening a bag forfilling purposes, which consists in engagingthe bag by the with respect to the end to open the bag.

2. The method of opening a bag for filling purposes, whichconsistsin engaging the bag by the side and end to open it, in holding it by the. side face while it is being filled and indischarging it by release of the hold upon the side face. 4

3. The method of opening a bag and holding t for filling, which consists in applying suction to the bottom and one side of the bag respectively 'while the bag is closedand in opening the bag by relatively angularly moving the bottom and side of the bag while maintainingthe suction upon them; l

4. The method of opening a bag and holding it for filling, which consists in applying suction to the bottom and one side of the bag respectively while the bag is closed, inopening the bag by rel- .atively angularly moving the bottom and side of the bagwhile maintaining the suction upon them i and holding the bag by the suction while it is being filled.

5. The method of opening a bag and holding it for filling, which consists in applying suction to the bottom and one side of the bag by relatively angularly moving the bottom and side of the bag while maintaining the suction upon them, holding the bag by the suction while itis being filled, 1

moving it to the point of discharge while retaining suction support of the bag and discharging the bag by releasing the suction. V

6. In the art of bagging, the method of opening ,a folded paper bag which consists in angularly pulling one side of the bag with respect to the bottom by means of suctions applied simultaneously to the bottom andside,

'7. In the art of bagging, the method of using a suction plate to open a folded bag, which cdnsists in holding the bottom of the bag, in applying the plate to the side thereof and in angularly moving the plate about an axis substantially coincident with a common edge of the side and bottom.

8. In the art of bagging, the method of using a pair of relatively movable suction plates to open a folded bag-which consists in applying one suction plate to the side of a bag and the other suction plate to the bottomthereof and in angularly moving one of the plates with respect to the other about an axis substantially coincident with a bottom edge of the bag. i

9. In the art of bagging, the method of using relatively movable suction faces to pick, present,

open and hold a bag for operations incident to filling and closing which consists in applying one of the faces to one side of a folded bag,

, present and open a bag, in holding it by the plate moving the face to present the bag so that the bottom thereof is applied to the other face, in angularly moving the one face with respect tothe other to open the bag, and in using the two faces in the open position to hold the bag for the filling 5 and closing operations;

10. In the art ofbagging, the method of using fsuction plates fhr the; holding of a paper bag a open forfilling which consists in applying one plate to the side of the bag and the other plate to the'bottom thereof and in positioning and holding the plates for maintaining the bag open. 11. In the art of bagging, the method of using a suction plate which consists in holding the plate against aside of the open bag for bag fillingand closing operations, and subsequent to closing, in moving the suction plate to'transfer the bag from filling to discharge position and in releasing the suction to drop the bag to dis- 2o charge. I r

12. In the 'art of bagging, the method of using a movable suction plate which consists in moving the plate through a cycle of movement to pick,

suction for filling and closing and in repeating the first cycle of movement to discharge the bag,

releasing the plate suction at the time of dis- 13. In theart of bagging; the method of using a suction plate which consists, in successively reciprocating the plate, constraining it to present its suction face substantially vertical at one end of its path of movementandhorizontally downward at the. other end thereof in using the face to pick, present and open a folded bag during one cycle, to hold the bag for filling and closlngoperations throughout a period intermediate the cycles and to discharge the filled and closed bag in the next cycle.

14. In bagging mechanism, a pair of relatively movable suction faces, means for applying one of i the facesto onefside of a bag and for moving the face topresent the bag so that the bottom thereof zaapplied to. the other suction face and means or angularly moving the faceaone with respect to the other. v

15; In mechanism for opening a folded bag, means for holding the bottom of the bag,,a suctionfplate and means for applying the plate to a side of the bag and then to move it angularly about an axis substantially coincident with the common edge of the sideand bottom of the bag.

16. In mechanism for opening a folded bag, two

suction plates, means for applying one plate to one side of the bag and the other plate to the bottom thereof and for angularly moving one plate with respect to the other about an axis substantially coincident with the bottom edge of the bag to open the bag.

17. In mechanism for bagginega suction plate for continuously holding one side of a bag throughout lpicking, presentingfilling and closure of. the bag, means for moving the plate to effect picking, a second suction plate, means for moving the first plate to present the bottom of thebag to the second suction plate, means for angularly moving the first-platewith respect to the ,second to openthe bag'andfor maintaining the first plate in position adapting'the cooperating actions of the two plates to hold thebag open, means for releasingthe suction in the second suction mate after the baghas been filled and closed and for effecting discharged the filled and closed bag by moving the first member so that its suction surface and depending bag are above the point of discharge and for dropping the bag to discharge by releasing the suction in the first plate. 1

18. In bagging mechanism, a pair of cooperat ing suction plates one movableand the otherstatlonary, means for applying the movable plate to one side of a folded bag, for moving .the plate to apply the bottom of the bag to the stationary plate and while the plates are respectively holding one side and the bottom of the bag-for turning the movable plate with respect to the stationary plate in order to open the bag.

' ing suctionplates, one movable and'the other stathe movable plate to one side of a folded bag for 19. In bagging mechanis a pair of cooperating suction plates, one mo able and the other stationary, means for'applying the movable plate to one side of a folded bag, for moving the plate to apply the bottom of the bag to-the stationary plate for using the movement of the movable.

plate asit brings the bag tothe stationary plate to apply, suction to the stationary plate, and while the plates are respectively holding one side and the bottom of the bag for turning the movable plate with respect to the stationary plate in order to open the bag.

20. In'bagging mechanism, a pair of cooperattionary, and'means for moving and applying using, the movement of the movable plate to the bag to turn suction int the movable plate in order to effect picking, and for-moving the plate after picking to applythe bottom of the bag to the stationary plate.

21. In bagging mechanism, a suction plate for picking, presenting and opening a horizontal folded bag, a guide and cooperating'plate movingmeans giving the plate a movement, comprising an outward movement withthe suction surface of the plate turning arcuately downward toward the end of the outward movement and a retraction movement including an e rlier portion substantially rectilinear a'nda later portion during which the suction plate turnsarc'uately upward. y r

22. In bagging 'mechanism'a statioriary suction chamber having an upwardly directed suction faceand spaced ports respectively to a source of suction and to'atnfosphere, a valve member having surfaces and a range of movement adapting it to close one port when the valve is in one position and the" other port when the valve is in another position, each port being open while the other is closed, a movable suction plate adapted to pick a'folded bag and'to present the bottom thereof to the holding surface of the stationary suction chamber for subsequent holding during opening, filling and closing of the bag,

mechanism for positioning the valve for suction in the chamber when the movable suction plate is presenting .the bag bottom to the stationarysuction face and to reverse the position of the valve subsequent to the closing of the bag ,in order to permit easy discharge of -the bag.

mediate position of the valve, and pressing the valve to closure at either port, a movable suction plate adapted to pick a folded bag and to present the bottom thereof to the holding sur- ,face of the stationary suction face for subsequent holding during opening, filling and closing of the bag, mechanism for positioning the valve for suction in the chamber when the second member is presenting the bag bottom to the tion chamber having an upwardly directed suction face and spaced ports respectively to a source of suction and to atmosphere, a valve memberhaving surfaces and a range of movement adapting it to close one port when the valve is in one position and the other port when the valve is in another position, each port being open when the other is closed, a movable suction plate adapted to pick a folded bag and to present the bottom thereof to the holding surface of the stationary suction box for subsequent holding during opening, filling and closing of the bag, mechanism adapting the movement of the second suction member to position the valve for suction inside the first chamber and other mechanism to reverse the position of the valve subsequent to the closing of the bag in order to permit easy dis-1 charge of the bag.

25. In bagging mechanism, a turntable, heads I spaced around the table each including movable and stationary suction compartments, the statiionary compartment having a suction surface I d rected 'upwardly and ports respectively to a source of suction and to atmosphere, a valve member adapted to close either port leaving the turntable and to present the bag with its bot-',

tom against the upwardly directed surface of the stationary compartment, means for setting the a valve forsuction in the stationary compartment wheifihe bottom of the bag is presented thereto,

gfor'moving the movable plate upwardly about an axis substantially coincident with the common edge of the bottom and side of the bag in order to open the bag and an operating member for reversing the valve as the turntable brings the head into a subsequent position of rest, the discharge position thereof, releasing the suction hold on the bottom of the bag in order to permit easy discharge of the bag.

26. In bagging mechanism; a turntable, heads spaced around the table each including a movable and a stationary suction compartment, the stationary compartment having a suction surface directed upwardly and ports spaced radially member adapted to close either port leaving the other open and provided with'a radial extension, means for moving the upper suction member to pick a folded bag during a position of rest of the turntable and to present the bag with its bottom against the upwardly directed surface of of the turntable and opening respectively to a source of suction and to atmosphere, a valve the stationary compartment, means for setting 70 the valve for suction in the stationary compartment when the bottom-of the bag is presented thereto, for moving the movable plate about an axis substantially coincident with the common edge of the bottom and side of the bag in order

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