Патент USA US2405391код для вставки
6,. E 4 . E. iF. ANDERSON www ' BAG WAXING MACHINE Filed April 22, 1943 ‘ 2 Sheets-Sheet l BAG WAXING MACHINE Enea April 22, 'i2/,.15 2 sheefìS-sheet 2 Patented Àug. 6, 1946 2,405,391 ’ UNITED STATES PATENT OFFICE 2,405,391 BAG WAYING MACHINE Edwin F. Anderson, Buffalo, N. Y., assigner to Pillsbury Flour Mills Company, Minneapolis, Minn., a corporation of Delaware . Application April 22, 1943, Serial No. 484,091 9 Claims. (Cl. 91-46) l 2 This invention relates to an apparatus for coat Fig. 2 is a side elevation of my said apparatus; Fig. 3 is a vertical section taken approximately on the line 3_3 of Fig. 2; Fig. 4 is a vertical section taken on the line ing and sealing the ñlling ends of paper bags and other containers after the same have been ñlled and the filling ends stitched or otherwise secured. At the present time multiple-wall paper bags Ul 4_4 of Fig. 2; and are extensively used for packaging granular and Fig. 5 is a perspective view with some portions pulverized materials and such bags as made by broken away and others shown in section of a the manufacturer are collapsed ñatwise and have multiple-wall paper bag ñlled with‘ granular ma the lower end thereof stitched, bonded or other terial and having its filling end coated and sealed by my improved apparatus. ` i wise secured together to form a reinforced tab and such tab is further reinforced, coated and The form of my apparatus illustrated includes . sealed by the manufacturer, usually with a heavy an elongated upright frame, as shown, compris coating of wax. Such bags are tubular and are ing two series of opposed spaced posts 6 which kdistended and filled with material from conven may conveniently be constructed from metal pipe tional dispensing and measuring machines where having attachment pedestals 6a secured to the after th'e opposite sides of the filling end or upper _lower ends thereof for bolt or screw attachment end of the bag are collapsed together and secured to a horizontal supporting surface or floor. Op to form an upper tab by stitching, bonding or posed pairs of said posts 6 may be secured to other securing means. It is then necessary and gether and braced by transverse pipes or other required by Government regulations to seal and 20 suitable members l. „ ` coat the upper tab so formed with a heavy coat At the upper portion of th‘e elongated frame ing of self-hardening material, such as wax or so constructed a pair of parallel spaced rotary paraffin. „ ' shafts 3 are suitably journalled and extend An object is the provision of simple, highly throughout the length of the frame and have the efficient apparatus which can be produced at rela 25 right hand ends thereof journalled in suitable tively low cost and which is fully automatic and bearings 9 attached to the two respective right continuous in operation for successively coating hand end posts 6 of the frame. The left hand a multiplicity of bags or other containers of the Aends of the rotary shaft 8 are journalled in simi type described. ` « l lar bearings it mounted at the upper ends of More specifically it is an object to provide bag 30 the respective left end posts of the frame. The coating or waxing apparatus of the type described axes of the two parallel shafts 8 are aligned in which employs minimum number of working parts a plane inclined slightly from the horizontal from and which utilizes a paii` of cooperating screw the right hand ends of their left hand extremities. type conveyor elements in a dual capacity for Additional bearings l l for the medial portions of both supporting a filled bag in inverted position 35 the elongated rotary shafts 8 are provided at the for dipping the flattened filling extremity thereof upper end of the intermediate posts 6. Shafts 8 in a trough containing melted wax or other coat are connected for driving in opposite directions ing ingredients and for also bodily moving the and constitute a supporting medium for the bags said bags longitudinally of the machine across which are to be processed, as well as a conveying th'e coating-containing trough and therebeyond 40 medium for moving the filled bags through' the _machine horizontally and longitudinally of the to coat the tabs formed at the filling ends >and to facilitate hardening of the coated tabs before the frame. To obtain such conveying function I bags are discharged from the apparatus. Y provide the two shafts 8 with a helically wound These and other objects and advantages of the conveying element 8a lthe convolutions thereof >invention will more fully appear from the fol 45 being rather widely spaced and the windings of lowing description made in yconnection 'with the th'e two shafts 8 being opposite to cooperate in accompanying drawings, wherein like reference 'progressing the bags. The double screw conveyor .characters refer to the same parts'throughout may be conveniently formed by securing, by weld 'the views and in which ing or other suitable means, a helical coil 8a of Fig. 1 is a plan view of an embodiment of my 50 rod material to the external periphery of the `apparatus showing a filled bag about to be tilted shafts 8. The` helical coils 8a are broken or in into inverted position and so received by the sup terrupted at the medial portions of the respec porting and conveying medium of my apparatus tive shafts 8 to accommodate the central bearings and showing several >other bags vin progress through my apparatus; A " ì Suitable driving means are provided for the 2,405,391 3 4 two rotary sh‘afts and as shown comprise for each right hand end of the machine and for tilting such bags during the delivery to inverted position to properly dispose the same upon the supporting and conveying shafts 8 with the secured filling shaft a beveled gear I 2 mounted on the inner end of a stub shaft I2al which is journalled in a suit able bearing i3 mounted on one of the left end posts â adjacent the lower portion thereof and having its axis disposed in a plane parallel with the axis of the shaft bearings I0. - Bevel gears I2 are meshed with smaller beveled gears i4 fixed to a transverse shaft I5 journalled at its respective ends in suitable self-aligning bearings I5a and as shown supported on a pair of pedestals I6. Shaft I5, as shown, as provided with a large central sprocket I1 which is driven by a roller chain I8 fromV a relatively ' small sprocket le which is shown as affixed tc the arma ture shaft of a motor M. The gear ratios be Ul end. thereof positioned between the shafts 8 and depending therebelow into the upper level of the melted wax or coating liquid within the tank 21. The delivery mechanism illustrated comprises an inclined elevator or booster 32 of endless con veyor type driven at its upper or delivery end by suitable means such as a chain driving connection 33 which may be trained about a suitable sprocket driven by chain or other connection 34 from a sprocket 35 fixed to the right hand end of one of the rotary shafts 3. The delivered bags are guided downwardly into vertical position centrally of the two shafts 8a by opposed downwardly converging centering plates 36 and 31 respectively. are of such relation to the windings of the screw conveyors formed on shafts 8 that bags or other Operation _articles delivered to the receiving end of the shafts 20 The particular type of multi-wall paper bag ¿8 will be progressed steadily and comparatively tween the driving sprockets and beveled gears illustrated in Fig. 5 of the drawings comprises, rapidly. Each of the shafts 8 is directly driven before being filled, a multiple tubular construc from its left hand end by a chain 2li which is tion pleated and folded flatwise along longitudinal trained about a sprocket 2I on the outer end of the related stub shaft l2a and about a sprocket 25 edges throughout the several pliesI of the mate rial. The bottom edges of the bag are secured 22 fixed to the outer end of the appropriate together by the manufacturer by folding a strip shaft 8. 1li! of heavy reinforcing flexible material and this A pair of spaced horizontal guide rails 2li hav strip is lock-stitched at 4I in folded form through `ing smooth, rectilinear, opposed faces are suit ably supported by angle irons Gb which extend 30 the upper and free edges thereof or through the several layers of paper constituting the tubular inwardly and then upwardly from the upper ends portion of the bag. In the manufacturing of the of the two series of posts 6 and are spaced apart bag, the reinforced and stitched lower edge is the' appropriate distance and mounted at the usually sealed and protectively coated by the proper height for effectively guiding the filled bags B in their travel through my apparatus. These guides 2li as shown extend throughout the manufacturer with wax or other suitable air hardening coating material. , The bag B is, of course, distended and suitably held for filling with the upper or filling end -open guide 2t on the forward side of the machine and granular or pulverized material is` dispensed (Figs. 1 and 2) extends parallel with the conveyor shafts 8c. from the receiving end of the machine 40 therein by a suitable dispensingmachine, not shown, the bag Ibeing filled to a point somewhat >to a point within a fewV feet from the driving below the upper end thereof. The filled bags transmission M and then has a section 24a angled then have their upper ends collapsed together in obliquely with reference to the main section 24 `the manner of the lower ends previously described >for directing thev bags laterally outwardly of the greater part of _the length of the machine. The The opposite or rear side guide 24 45 and a strip of reinforcing paper or material 40 is folded over the free edges of the filled end of the bag and stitched therethrough in the manner of the angled deflecting guide section 24a leaving previously described. The bag so filled, with the a lateral opening in the rear guarding wall to per machine. terminates a foot or so short of the connection mit discharging of the bags automatically and upper ñlling end secured and reinforced, is ready laterally of the machine, thelateral discharge for processing by my improved apparatus. ' trough, as shown, being inclined. bags arel progressed.v or moved longitudinally The filled bags with the‘ñllin'g en'ds's'ecured causing the bags to fall or tilt to substantially and reenforced as previously described are-'dis horizontal position in leaving the supporting con posed upon the endless conveyor or booster 32 veying shafts. ` automatically or manually, as the case may be, Directly below the right hand portion of the double screw conveyor formed by shafts 8 with 55 with the upper end of the bag disposed forwardly or upwardly with respect to the conveyor and the the helical windings 8a'. therein, is mounted an bag positioned longitudinally of the conveying elongated narrow horizontal coating trough 21 belt. These bags are successively carried tothe containing coating material such as melted wax upper and delivery end of the conveyor 32 and and as shown supplied with the wax or other are dropped therefrom on to the right hand end coating material from a heated supply tank 28 of'Fig. l of the conveyor shafts il guidedand 'mounted at the right hand end ofthe machine centered by the cooperating converging center and having a supply connection or conduit 29 ing plates 35 and 3l. The bags in dropping from provided with ashutoff valve 29a adjacent the the elevator 32 are tilted and inverted, the nor tank. In the bottom of the'tank, as shown, I provide a U-shaped coil or steam pipe 39, the mally upper ends thereof which have justY been ends of which extend through the right hand end 65 closed and stitched, being positioned downwardly of the wax trough and are sealed therewith and with the wide tab disposed betweenpthe shafts 8 connected to a suitable source and return pipe and depending therebelow into theV melted wax of a steam line. Trough 21, as shown, extends trough 21. The bags are guided by the spaced from a, point adjacent the right hand end of the 70 screw `conveyor shafts 8' in cooperation With the machine throughout slightly greater than half the `guíd'e'railings 24 and shafts l8- being rotated in length of the shafts 8, the forward end of the opposite directions for conveying purposes. The ’ As illustrated, my apparatus provides a. means throughinto the the machine wax inwitliîthe the trough'2‘1. depending ' tabs "for intermittently delivering filled bagsto the 75 dipping 2,405,391 È '6 » it will be noted that the wax 1eve1 L of the trough- V2‘I'i‘s naturally disposed horizontally and specific details of the steps and variances in the sequences thereof may be made all Within the at a'slight acute angle to the slightly upwardly scope of my method invention. inclined conveyor shafts 8 whereby the tabs will What is claimed is: l clear, or substantially clear, the left hand end 5 l. Apparatus for coating and sealing the se of the trough as the bags pass over that end in cured and collapsed filling end of a filled paper movement through my machine. Thereafter fur bag or the like having in combinationl a combina ther movement or travel of the bags from the tion supporting and conveyor medium disposed forward end of the trough to the delivery end of substantially horizontally for receiving the the-screw conveyor shafts ëi` affords adequate 10 closed and secured ñlling end of a filled bag, 'said time for >the wax or other coating material to medium having a central longitudinal slot ex dry and harden before the bags are delivered. As tending- throughout the greater part of its length ~ the bags move to the delivery end of the machine for accommodating the «projecting secured exn the angled guide section 24a causes lateral de tremity of said bag and having'opposed, cooper livery of the bags from the rear side of the ma 15 ating elements adapted to only frictionally en chine and the bags in discharge will fall horir4 zontally. ` ‘ Throughout this operation it will be noted that `the rotary shafts 8 with the conveyor coils 8d secured thereto serve both the function of con stituting the support for the inverted upright filled bags as well as the mechanism for moving the bags longitudinally through the machine. The rounded or rod construction of the conveyor gage the opposite sides of the filled bags, and a trough mounted directly below said conveyor for containing coating material at a le'vel to cover said projecting portion of the closed end of said 20 bag and coat the same during a part of the travel of said bag on said conveyor, Said conveyor ex tending for Isome distance beyond said trough to allow thecoated portion of said bags to dry coils prevent any cutting or injury to the bags 25 and means at one end of said conveyor for fa cilitating removal of the processed bags there The gear ratios of the from. _ transmission mechanism, including the motor 2. Apparatus for coating and sealing the se sprocket I9, large sprocket H, bevel gears M with cured and collapsed filling end of a filled paper meshed bevel gears I2 and the relation thereof bag or the like having in combination, a pair of to the pitch of the conveyor convolutions, are 30 spaced elongated screw conveying and support proportionedand related to cause the bags to ing shafts disposed in substantially a horizontal be progressed in close spaced relation as fast as path, the convolutions ofthe screwelements of they are delivered by the elevator 32. Thus the said shafts being spaced much closer than the machine has a high capacity for work and re width of said iilled bag,> means for driving the quires no manual labor in so far as the tilting of 35 same, guiding means disposed above said shaft the bags, disposal of the same in upwardly in and substantially horizontally disposed for en verted position on the shafts 8a, progression of gaging and guiding the vertical sides of bags to the bags through the machine and coating of the be processed,l said shafts being positioned for depending tabs, as well as drying, are concerned. receiving an inverted filled bag having its filling From the foregoing description it will be seen in the conveyor action. that I have provided a simple, comparatively in expensive and highly eñicient apparatus, capable of production at low cost, and which is fully auto matic and continuous in operation for succes 40 end collapsed and secured to form a downwardly projecting tab, said shafts being of va diameter to at least partially support said bags with the tabs depending downwardly at one side of said and a trough mounted directly below said sively coating the secured filling ends, of flexible 45 shafts, shafts and containing coating material at a level containers, such as paper bags and the like. It will further be seen that I have provided a to cover said projecting tab and coat the same during a part of the travel of `said bags along simple, inexpensive and highly emcient method said conveying shafts. for successively coating by continuous operation >3. Apparatus for coating and sealing the se a multiplicity of iiexible bag ends after the bags 50 cured and collapsed filling end of a filled paper have been filled and the filling ends secured. My method will be apparent from the fore bag or the like having in combination, a pair of spaced parallel screw conveying shafts disposed going description relating to operation and struc in substantially horizontal relationship for suc ture of my apparatus and consists generally in cessively receiving at one end of said apparatus ñrst inverting a filled bag having the filling end 55 a series of inverted filled paper bags or the like collapsed and secured to form a tab and there~ with the filling ends thereof collapsed and se after moving the inverted bag through a sub cured together to form depending tabs accom~ stantially horizontal. course while immersing the modated in the space between said parallel lower tab or secured edges of the bag in self shafts, the screw elements of said conveying hardening coating, material such as wax, 60 shaft having their convolutions spaced much throughout at least a portion of the traveling closer together than the widths 0f said filled bags movement of the bag. Additional steps of my rto only engage frictionally, opposite side por method include preferably the further movement tions of said bags, means for driving said screw of the bag throughout the predetermined course conveyor shafts in opposite directions to progress after the depending secured edge or tab thereof 65 said bags, and a trough mounted below said has passed from the coating material to allow shafts and containing coating material at a level the coating material to harden. More specili ’ to cover said projecting tabs during a part of cally my method includes the receiving, support the travel of said bags along said conveyor shafts. ing and conveying of the inverted filled and se 4. The structure set forth in claim 3, wherein cured bags through a combination support and 70 said trough is mounted horizontally and said conveying medium which also has guiding func shafts are inclined from the horizontal slightly tions in assisting and maintaining the bags as upwardly from their receiving ends` toward their they are processed in upright position. delivery ends whereby said tabs after coating with It will, of course, be understood that various material will substantially clear the farther end changes may be made in the apparatus and that 75 of said trough. ' 2,405,391 8 for drying the coating material before delivery said bags through approximately 90° and for di recting said bags to be successively supported in inverted, upright position upon said medium and of said bags and means associated with the outer means below said medium for coating the pro 5. The structure set forth in claim 3, and said shafts extending considerably beyond said trough ends of said shafts for automatically discharg ing said coated bags laterally of said apparatus. 6. Apparatus for coating and sealing the se cured, projecting and collapsed ñlling ends of filled paper bags or the like, having in combina jecting secured portions of said bags during travel thereof upon said conveyor elements. S. Apparatus for coating and sealing the se cured, projecting and collapsed iilling ends of iilled paper bags or the like, having in combina tion a combination supporting and conveying me 10 tion a combination supporting and conveying medium, comprising a pair of parallel substan dium, comprising a pair of parellel substantially tially horizontal conveyor elements adapted to horizontal conveyer elements adapted to engage engage opposite sides of the bottom portion of opposite sides of the bottom portion of inverte-d inverted bags and spaced apart to provide an bags and spaced apart to provide an elongated slot elongated slot for accommodating the projecting for accommodating the projecting ends of- said bags, means for driving said medium and a trough mounted below said parallel> conveyor elements and extending longitudinally thereof and containing coating material at a level to cover said projecting ends during part of the travel of said bags upon said conveyor elemento. '7. Apparatus for coating and sealing the se' ends of said bags, a cross conveyor having its de livery end disposed at some height above the re ceiving end of said medium and adapted to de liver filled bags substantially horizontally and to tilt said bags into inverted, upright position dur ing such delivery, and a trough mounted below said parallel conveyor elements and containing coating material at a level to cover said project cured, projecting and collapsed filling ends of ing ends during a part of the travel of said bags ñlled paper bags or the like, having in combina upon said conveyor elements. tion a combination supporting and conveying 9. The structure set forth in claim 8, and con medium, comprising a pair of parallel substan verging, centering and guiding means between tially horizontal conveyor elements adapted to the delivery end of said cross conveyor and said engage opposite sides of the bottom portion of medium, for assisting in precisely positioning said inverted bags and spaced apart to provide an elongated slot for accommodating the projecting 30 ñlled bags upon said medium in proper vertical, in endeI of said bags, means for successively deliv verted position. ering a series of bags to the receiving end of saidsupporting and conveyor medium and for tilting EDWIN F. ANDERSON.