Nov. 5, 1946. B. A. HANNEWÀLD Èl‘AL 2,410,73î BAG TURNER Filed Nov. 8, 1945 4 Sheets-Sheet l iwi »Si@_ _ Nov. 5, 1946. B_ A, HANNEWALD ETAL 2,410,731 BAG TURNER Filed Nov. 8, 1945 4 Sheets-Sheet 2 N0V~ 5, 1946. B. A. HANNEWALD ETAL ¿M0531 BAG TURNER Filed Nov. 8, 1945 4 sheets-sheet 4 Z,4l0,731 Patented Nov. 5, 1946 UNITED STATES PATENT oEEiÍcE BAG TURNER Burton A. Hannewald, Joseph J. Lee, and James M. Wheatley, Indianapolis, Ind.,- assignors to Bemis Bro. Bag Company, St. Louis, Mo., a corporation of Missouri Application NovemberS, 1945, Serial No. 627,402 10 claims. (Cl. 223-39) 1 2 . This invention relates to bag turners, and with regard to certain more specific features, to so-called stick turners, particularly for turning` banded-label bags such as shown'in the United States patent applications of Charles V. Brady and August F. Ottinger, Serial Nos. 535,004, 578, 976 and 646,577, Viiled May 10, 1944, February 2l, 1945 and February 9, 1946, respectively. sticks are then spread apart by pairs and addi tional reciprocating sticks are then driven against the bottoms of the bags to push these through the mouths so as to turn the bags inside out. By inside out is meant that bags which are manu factured with` their rough seams outsideA are turned so as to place these rough seams inside. In general, two reciprocating turning sticks are used located quite close to the bag edges. These Among the several objects of the invention may be noted the provision of a stick type of 10 drive the bag bottoms through their mouths. The purpose of this is to produce a flat turned Ibag turner which will turn banded-label bags bag. This former scheme is satisfactory for without tearing the labels; the provision of a bags which bear no inside labels or the like prior turner of the class described which may be oper to turning. Such bags in general have the labels ated at the same speed as former turners operat applied after turning. ing on non-labeled bags; and theprovision of ap paratus of the class described which may readily ` „ According to said two applications above men be adapted to bag turning apparatus now in use. Other objects will‘be in part obvious andin part pointed out hereinafter. tioned by number, and as further indicated herein, some bags are now made with a girthwise labeling band or the like applied to the fabric before the When the bag is sewn this band or label is on the inside. When such bags are ap , plied to the old turners, the turning sticks oper ating quite close to the bag edges tend to buckle the bag fabric at these points, and consequently described, and the scope of the application of which will be indicated in the following claims. 25 also the labels. The buckling is quite sharp, particularly at the bag edges. Since the stated In the accompanying drawings, in which one labels have portions at the bag edges, they also of various possible embodiments of the invention are turned quite sharply and there is some tend is illustrated, ` > ' ency to tear, crack or break these so that they b Figui is a side elevation showing substantially an' entire bag turning apparatus to which the in 30 'become disñgured in their iinal outside positions. `Thepresent invention overcomes this diñiculty in vention is applied; respect to this class of labeled bags. Fig. 2 is a plan view of Fig. 1; Referring now more particularly to Fig. 1, there Fig. 3 is an enlarged detail plan View of sig is shown at numeral I- a frame on whichare nificant portions ci Fig. 2 shown in a retracted 35 guide rails 3 for a reciprocating carriage 5. In position; ' the frame I is a rotary crankshaft v'I carrying Fig. 4 is a view similar to Fig. 3 showing the a crank 9 (counterweightedv at I0) which through parts in an advanced position; a connecting rod Il oscillates a lever I3 pivoted Fig. 5 is a fragmentary detail showing certain at I5 in the frame I. Shaft 1 is driven from a turning` sticks feeding a bag into take-oli means; Fig. 6 is a diagrammatic view of parts set ac 40 power shaft 8 through a gear train 4I, 39. The lever _I3 carries a grooved sector I'I, the outer ` cording to Fig. 3 but illustrating preliminary Ycircular'face of which is centered at I5. Looped operations on a bag; y over a forward edge I9 vof the sector Il and fas Fig. 7 is a front elevation of Fig. 6; tened at ZI is a cable 23 which passes tangen Fig. 8 is a View similar to Fig. 6 but showing 45 tially off to the rear from the sector and is at an advanced position of parts; tachedvat 25 to the rear end of the carriage 5. Fig. 9 is a front elevation of Fig. 8; Likewise, there is looped over a rear portion 21 Fig. 10 is a view similar to Fig. 'K8 but showing of the sector I'I and fastened at 29 a cable l-II> a still further advanced position of parts; and, Vwhich passes tangentially from the sector for Fig. 11 is a front elevation of Fig. 10.> The invention accordingly comprises the ele "ments and combinations of elements, features of construction, and arrangements of parts which vwill be exemplified in the structures hereinafter ¿Similar reference characters indicate corre sponding parts throughout the several views of the drawings. _ VSo-'called stick types of turning machines have been used for bag turning. In these a bag mouth 20 bag is formed. wardly to a fastening 33 at thefront'end of the carriage 5. Thus upon rotation of the crank 9 and oscillation of the lever I3, along with >the oscillation of the sector Il, the carriage 5 may be reciprocated on the guide rails 3. The> stroke is applied overv several sticks, usually four. These 65 vmay beadjusted by adjusting theposition of the pin joint between the connecting rod II and the lever I3 in one of several holes such as shown at 35, thus accommodating the stroke to various lengths of bags. On the said shaft 8 is also a gear 43 which 4 l’ tions of the slides ss in the guide slots 85. They heads -I9 ‘being rigidly connected with the slides 83 will cause properly timed rocking actions of the turning sticks 'I3' in the horizontal plane about the pivots '|I. drives apinion-45. The latter-drives gears 41 and 49 for driving a set of draw rolls 48 and 50 receiv ` ing between them turned bags. III and ||3. The iront portion of the stick is round in bearing |i| and square in bearing ||3, In front of the rolls 48 and 59 are mounted At numeral I 69 is shown a central turning stick» which is slidable longitudinally in bearings rolls 52 and 54, respectively. Belts 56 overY the 10 thus preventing it from turning indiscriminately respective pairs of rolls 50, 54 and 48, 52 move in the direction shown in Fig. 11.» to receive turned on its axis. Pivoted at ||5 on the stick |09 is an oscillating block ||'| which ñts in the forked end bags and eject them from the machine. A suit |fI-.9.of_a bell crank I2 i. This bell crank is pivoted able belt shifter mechanism may be used for the f at |23 to an- extension part |25 of the carriage 5. belts 56 to adjust them laterally on the rolls to 15 One` leg of the bell crank carries a roll follower accommodate them to various bag widths, but since this shifter forms no part of the present in vention, it is not shown nor further described'. On the shaft 'I is a cam 58 which bears against |27 which operates in a groove |29 of a second track |31, also attached to the frame |. This track |31' has an oiiset |33 (Figs. 3 and 4) which upon reciprocation of the carriage 5 provides swinging movement Aof the bell crank |2I with Ha.»,follower roll 50, the latter being carried upon 4.alever 62 pivoted at 64. Pinned at 66 at the respect to the carriage. This movement is of an Qe'ndofi the lever 62 is a connecting rod 53'. At the oscillating character’ and atf a predetermined Íótherend the rod 53" is pivoted at 6| to rocking point in the travel of the carriage 5 causes rela. _lever 55. Pivoted at 68 on the lever 55v is a rod tive axial advance or retraction of the stick |09 ‘I’U’which at its outer end' slides throughv an eye with respect to the carriage. 25 4T2- on the frame I. A spring 'I4 vreacting from Operation> is as follows: Íthe‘frame and against a collar' 'I6 carried on the Rotation of the shaft l turns the crank 9 Írb'd -I0H serves to bias the driving linkage for the which through connecting rod || oscillates the lever 55 so that the follower 60¥is held against rocker I5 and the sector |'|'. Thus the carriage Íthelcarn 5B. ` 30 5 is reciprocated by the ñexible connections 23 . " Lever 55 is carried on a rock shaft 5l on which and 3|. The cam 58 drives the follower 60 which, also. are held’ two lower spreaders 59. On ñxed through the lever 62 and' rod 53, oscillates the shaft V80, above the spreadei‘sï 59 are two upper, lever 55. This oscillates the lower set of spread non-rocking spreaders 63. By a'known suitable Vers 59. The upper spreaders63 remain ñXed. ,meananot shown, the members of the respective 35 Also, through the gear train 43, 4‘I and 49 is pairs Ío'f`sprea'ders 59` and 63 may be adjusted' to eiîected turning of the rolls 59, 48 and movement various llateral ydistances forr accommodation to of the belts 55. Adjacent belt reaches move from .various bag widths.H The shafts 51and 80 are the apron 94 toward'theV outlet of the machine. carried upon a support A82. " Aä platen 8‘4 extends n Assuming that the carriage 5 is retracted to the „from this support toward vthe rolls l52 and' 54. A 40 right as far as possible (see Fig. 3), the lower able |355 is positioned above the frame I`behind spreaders59` become raised so that they are close lthe Asupport 82. ` ~ n to the spreaders S3. The operator slides the open _ ¿The parts above> described are old and further mouth of a bagover the spreaders 63 and 59, the _description will be`unn`ecessary. The improve body' portion of the bag resting on table |35. ments herein described have toV do particularly 45 This is done at the time that the carriage 5 is ¿with „attachnients- lon the carriage 5. Rêfëi' now moreparticularly to Figs. 3-11, the car riageSfha's rigidly Amounte'don ~it` a crossbar 65 whi . Ih is Ía T-slot 6l. Along it are index marks 'tai' *m the att `e1 are 'adjustable' 'r-tet‘dça 'Studs 'I`| which may be loosened and tightened artÍ any _desiredposition?along the slot S'I‘. l‘'I‘hesefloolts «'lÈlÍferm rivets ,for latéral. 'SiSÍeeiegflïmßîeeSlëïßks -'i3. _,_Thesne sticks swing-inlY a horizontal plane. nacnsuckiáhas/ attached to it a b1`ock’1'5whijch has apivoted 4connectionli with ahead V‘|91v Each head_,"|9 is'icarriedwonfthe end_s oi" apair oilr‘igid Y10a-rsV .8l . extending from a 511016,83- Eeçh ,Slide has laV suitable extension in a guide Slot 35. at the re spective end of, a’seçîond cross >guide4 87A of. the @arriesga ïîivoiedßoneeßñees. 89 .Serve t@ G011 .riveted at Y95: to the, Carriage, 5f. Ari .extension arcieri, frein the rocker .93 Provides . meses-.ier k0,sci1,1aiï1ins the ro<=ker-1~Tliis lexteesìoneimßl et ,its 4outer VendVV carries- ajroltfollower 99 A»which about to advance to the left. , As the carriage 5 begins to move forward, the spreaders 59 are caused to be withdrawn from the spreaders 53 so as to hold the mouth of the bag' open and taut, providing an opening through which the body of the bag may be pushed to turn itinside out. ' As the carriage advancesthe turning sticks 'I3 are together as shown in Fig. 3 with the end |39 of stick |09 in advanced position of ends |31 on the vsticks 13. A. substantial lead of stick |09 relative to sticks 'I3 is maintained during the early part of the travel. The conditions are diagrammed in Figs. 6v to V1l. As-the carriage 5Y advances the ball end |39 of the central turning stick. |09 enters the cen ter of one side of the bag and starts turning the bag inside ont from its center (Figs. 6 and '7). AS turning proceeds (Figs. 8 and 9) the sticks 'I3 65 follow in, at ñrst without spreading. The lead of stick |09 is maintained. As the action con tinues the bag turns inside out at the center so that most of the inside label band |4| has been .theirame Y|arcor@v wl» .as indicated@ .has an _offset |95 which.-wheathesarfieee risreciprócaec serves montane aimeriez» ti ely tothe carries@ 5- Thus; Wheriïtheßerrieee turned by a pull onA the fabric from. the center, as caused by the central stick |09., By first push ing the bag through its mouth by acentral’push as described, the label -band |4| >is. bent withI the leastbuckling. It should be noted that äthis band cillated and cause' opposite 1reciprocatin'g mo fis.generally -made of paperA attached by means of paste to the insideof Vthe bag, which is vmade 2,410,731 5 6 of fabric. Therefore this gentle initial central turning action is doubly important. complete the turning in such a way as to present the turned bags flatwise into the belts 56 for de ' After most or all of the label has been turned livery from the machine in desirable iiat turned by the central stick |99, the follower 99 reaches condition. vthe offset |05 in groove IUI. This causes a clock wise rotation of the rocker 93 with a spreading of the slides 83 in the guides 85. This causes spreading of the pivots 11 and angling out of the lateral turning sticks 13. Thus these sticks take over the turning action after the danger to the label strip has passed. Turning is then com . Another advantage of the invention is that it is easily applicable to present-day horizontal-ta ble turners such as outlined, since all that is re quired is the addition of the track |-3| and the following equipment on the cariage 15, such as the bell crank |12| and the central sliding turning stick |09. ' In view of the above, it -will be seen that the several objects of the invention are achieved and other advantageous results attained. ing turned. At the time that the turning action As many changes could be made in the above is taken over by the sticks 13, the follower |21 15 constructions without departing from the scope reaches the offset |33 in groove |29, which causes of the invention, it is intended that all matter the bell crank |2| to rotate clockwise relative to contained in the above description or shown in the carriage 5. This causes retraction of the cen the accompanying drawings shall be interpreted tral stick |99 with respect to the carriage. Thus pleted by the sticks 13 (see Figs. 5, 10 and 1l), which in spreading also flatten out the bag be the central stick |99 loses ground with respect to ~ forward movement of the sticks 13 and the turn as illustrative and not in a limiting sense. We claim: l, An improvement in a bag turner having a reciprocating carriage which reciprocates a pair ends |31 of these sticks feed the bottom end of of oppositely located turning sticks; comprising a Athe bag between the belts 53, which frictionally grasp the bag and feed it out of the machine 25 third turning stick loacted between said pair of sticks, bearing means on the carriage for sup from the platen 34. It will be noted that recipro porting the third stick movably with .respect to cation of the turning sticks 13 and |99 is -just the carriage and parallel to its line of reciproca above said platen 84. tion, and means for moving said third stick rela It may be noted that the timing is such that as the bag reaches the end of the turning opera 30 tive to the carriage first so that its end is in ad vance of the ends of said pair of sticks and there tion with its turned bottom near the belts 56, the after retracting with respect to the ends of said lower spreaders 59 ibegin to rise so as to loosen the pair of sticks. grip of all of the spreaders 59 and "93 on the bag 2. An improvement in a bag turner having a mouth. Hence continued forward motion of the longitudinally reciprocating carriage which moves sticks 13 serves to strip the turned mouth of the a pair of oppositely located turning sticks, the bag from the ends of the spreaders 59 and 63. latter operating edgewise on bags; comprising a The ends of these spreaders are rounded so that third turning stick located centrally with respect this stripping action occurs Without damage to to said pair of sticks, bearing means on the car the bag, The stripping action continues as the turned bottoms of the bags are fed in between the 40 riage for supporting the third stick movably with respect to the carriage and parallel to its line of belts 56. Thus the bags are flattened throughout reciprocation, and means for moving said third their lengths. stick longitudinally relative to the carriage first It will be understood that it is not desirable to so that its end is in advance of the ends of said continue the turning operation at the center by means of the ball |39 in advance of the ends |31 Y pair of sticks as the carriage starts a forward movement, and as the carriage nears the end of after the label has been satisfactorily either par its forward movement retracting said third stick tially or completely turned. This is because the 'with respect to the ends of said pair of sticks ball |39 might tend to punch a hole in the bottom until the end of the third stick is near or behind of the bag if the timing of the action of spread ers 59 were not perfect. Therefore it is desirable 50 a line joining the ends of said pair of sticks. 3. An improvement in a bag turner having a during the final part of the turning operation as reciprocating carriage which moves a pair of op described to have the ball head |39 fall back rel positely located turning sticks, the latter enter atively to the ends |31 until the ball is at least ing bags and spreading to operate edgewise on not substantially in advance of said ends |31. In bags; comprising a third turning stick located in other words, the ball |39 in the final stages of a plane substantially central with respect to the turning may be about between the ends |31 or be plane of spreading of said pair of sticks, bearing hind them. means on the carriage for supporting the third After the carriage 5 has reached the left-hand stick movably with respect to the carriage and end of its trovel, the sector |1 oscillates back and retracts it. This causes a reverse order of the 60 parallel to its line of reciprocation, and means yfor moving said third stick longitudinally rela events above described and the withdrawal of tive to the carriage so that its end is in advance the sticks into position under the table I5. At of the ends of said pair of sticks as the carriage the time that the carriage 5 has retracted to the starts a forward movement, and as the carriage right its maximum distance, the operator applies another -bag to the spreaders 59 and 63, which at 65 nears the ends of its forward movement and said pair of sticks spread retracting said third stick ' this time have gone back to their non-spreading with respect to the spread ends of said pair of positions close to one another. sticks until the end of the third stick is near or Advantages of the invention include the broad behind a line joining the ends of said pair of one stated, which is a starting of the turning ac tion of the bag by means of a centrally applied 70 spread sticks. 4. In a bag turner having a reciprocating car turning stick which causes the easiest possible riage adapted to advance and retract and having bending action on the materials of the inside pa a pair of lateral and longitudinal turning sticks per or like attached label. Then as the func on the carriage; comprising a central longitudinal tions of this central stick have been accomplished, the advancing, separating sticks 13 take over and 75 turning stick movable longitudinally with the car ing is completed by the spread sticks 13. The 2,410,731 riage and relatively thereto, means responsive to 8 pivoted to the carriage and cooperating with said the movement of the carriage 'for ñrst maintain central stick to move it in respect tothe car Ving the end of the central stick in advance 'of the riage, a follower carried by said rocker, and a ends of the lateral sticks during an initialpart cam track stationary with respect to the car of the carriage advance, vsaid means being Aadapt Ul riagey and engaged by said follower, said track ed relatively to retract the end of said >central being shaped to move the rocker in response to stick with respect to the lateral sticks during fur carriage movement to move the rocker with re ther advance movement of the carriage. spect to the carriage, said track being shaped so 5. In a bag turner having a reciprocating car riage adapted to advance and retract and hav-ing a pair of lateral and longitudinal turning sticks on the carriage, said sticks spreading upon advance of the carriage; comprising a central longitudinal turning stock movable longitudinally with. the carriage and relatively thereto, means responsive to the movement of the carriage for iirst main taining the end of the centralïstick in advance of the ends of the lateral sticks during an initial part of the carriage advance and before said sticks spread, said means being adapted relatively to retract the endof said central stick with re spect to the lateral sticks during further advance that upon initial advance of the carriage and before spreading of said pair of sticks the end of the central turning stick is located ahead of the ends of said pair of turning sticks and during further carriage advance said central turning stick is retracted to a position not substantially in advance of the then spread ends of said pair of sticks. 9. An attachment for a bag turner having a reciprocating carriage adapted to advance `and retract, said carriage having pivoted thereon lat eral turning sticks mounted to move with the carriage and to angle their` ends away fro-m one another during carriage advance; comprising a movement of the carriage and as said pair of central longitudinal turning stick mounted on the .carriage to move therewith and relatively 6. In vbag turning apparatus having a recipro v25 thereto, a rocker pivoted to the carriage and eating carriage adapted to be advanced and re cooperating with the lcentral turning stick to move tracted, and said carriage having longitudinal the saine relatively to the carriage, a 4follower and laterally located turning sticks, the ends of carried by the rocker, a stationary cam track which yare adapted to be spread during the ñnal ñxed with respect to the carriage and cooperat period of the carriage advance; comprising a 30 ing with said follower, said cam track being sticks spread. ' central longitudinal turning stick longitudinally >movable on the carriage, means responsive to movement of the carriage for maintaining the end of said centralr stick ahead of the ends of said shaped so that upon initial advance of the car riage the end of the central turning- stick moves with the .carriage in advance of the ends of said lateral turning sticks before said last-named ends lateral sticks during initial advance movement of separate, said cam track during the ñnal advance the carriage, said means during said spreading .movement of the carriage when the ends of the movement of the ends of the lateral sticks caus lateral sticks separate causing the advance end ing said end of the central stick to be retracted of .said central turning stick to Abe retracted to «at least to Ya point approximately between the a position substantially between said lateral turn ends of said lateral sticks. ' 40 ing vsticks in their advance in the separated con 7. An attachment for bag turning apparatus ditions of their ends. Ahaving a reciprocating carriage adapted to ad 10. An attachment for a two-stick bag turner vance and retract, said can'iage having lateral .having a reciprocating carriage upon which said turning sticks advancing and` retracting there >sticks are mounted for advance and retraction of with; comprising a central longitudinal stick lon 11; the ends »of the sticks; comprising a central stick gitudinally movable on and with respect to the mounted on the Ycarriage for movement therewith carriage, a. rocking means pivoted to the car >and longitudinally relatively thereto, a bell crank riage and cooperating with said central stick to .pivoted to the carriage, one arm of the bell crank move it in respect ¿to the carriage, a follower car having a forked connection with said central stick ried by said rocker, and a cam. track stationary for moving the stick longitudinally with Yrespect with respect to the carriage and `engaged by said to the carriage, said bell crank having a sec follower, said tra-ck being shaped `to cause move ond arm, a follower on said second arm, a sta ment of the rocker vin response to carriage move tionary cam track adjacent to the .path of mo ment, said track being shaped Vso that îuponinitial tion of .the carriage and .cooperating with said advance of the carriage the end ofthe central follower., said cam track having a straight por turning stick is located ahead of the ends of the tion> therein arranged to control said follower to lateral turning sticks and during ñnai carriage hold the bell crank in a position wherein during advance said central turning stick ‘m retracted to initial advance movement ofthe carriage the end a .position not substantially in ’advance of .the of said central turning stick protrudes .beyond the said ‘ends of the `lateral sticks. 60 lends >of said lateral sticks, 'said vtrack having an 8. An attachment for bag turning apparatus oiîset located so that at a .predetermined time having a, reciprocating carriage adapted to ad in the advance “movement of the carriage said vance and retract, -said .carriage having a pair end of `the Ícentral stick is retracted to .a position »of lateral turning ‘sticks advancing and retract .more nearly adjacent to the ends .of .said lateral ing therewith and having yends which spread >as 65 sticks as the Ycarriage finishes its advance. the advance progresses; comprising :a ’central '1on BURTON iA. HANNEWALD. . `«gituclinal stick longitudinally movable on >and JOSEPH J. LEE. with respect to the carriage, a rocking means JAMES M. WHEA'I‘LEY.