US2518014A - Carton folding machine - Google Patents

Description

Aug. 8, 1950 w. H. I'NMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 1 Filed Aug. 9, 1946 INVENTOR. ma/wfl kmm Aug. 8, 1950 w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 2 Aug. 8, 1950 w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 l4 Sheets-Sheet 5 INVENTOR.

Aug. 8, 1950 v w. H. INMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 4' Filed Aug. 9, 1 946 INVENTOR.

Aug. 8, 1950 w. H. INMAN CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 5 INVENTOR.

is Mrnj 8- 1950 w. H. INMAN 2,518,014 I CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 6 Aug. 8, 1950 w. H. lNMAN CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet '7 INVENTOR. Wfifzmaw 1950 w. H. INMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 8 IN VEN TOR.

Aug. 8, 1950 w. H. INMAN 2,518,014

CARTON FOLDING MACHINE Filed Au 9, 1946 14 Sheets-Sheet 9 INVENTOR.

a 2 Q E;

Aug. 8, 1950 w. H. INMAN CARTON FOLDING MACHINE 14 Sheets-Sheet 10 Filed Aug. 9, 1946 Aug. 8, 1950 w. H. INMAN 2,513,014

'CARTON FOLDING MACHINE Filed Aug. 9, 1946 l4 Sheets-Sheet ll Y INVENTOR.

Aug. 8, 1950 w, mm; 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9, 1946 14 Sheets-Sheet 12 INVENTOR- is zyiz aivzgy 8, 1950 w. H. lNMAN 2,518,014

CARTON FOLDING MACHINE Filed Aug. 9,. 1946 14 Sheets-Sheet 13 Aug. 8, 1950 w. H. lNMAN CARTON FOLDING MACHINE l4 Sheets-Sheet 14 INVENTOR.

Eli 07am Filed Aug. 9, 1946 Patented Aug. 8, 1950 UNITED j STATES PATENT OFFICE v i i f. 2,51s,0 1 i CARTON FOLDINGMACHINE I V 7 William H. Inman, .Newark,.N. assignor to t a Bloomer .Bros., Company NeWark, N. Y., a;c orh poration of New York p v A i ation August 9, 1946, SerialNo. 689,415 t This invention relates'to machines for fold- .1;-

ingblanks of cardboard or other sheet material to form containers or cartons, one object of the invention being to provide a machine adapted for folding a one piece blank to form a fluid tight 16 claims. (01.9354

carton of the variety having side walls continubusly connected at their corners by integral flaps folded to overlap in pairs against opposite side walls andinterlock' with each other, to maintain the carton in erected shape, substantially as disclosed, for example, inniy'copending patent 'application', Serial No.- 567g489, filed December 9, 1944, which has matured into Patent No. 2,419,646. Another object of the invention is'to provide an eillcient machine of the above character capable of reliably folding and securing such cartons in I erected shape at a rapid and economical rate.

A further object is to provide a machine of the above character having a simple and practical type of construction conveniently adaptedto receive the blanks and deliver the erected cartons To these and'other ends the invention resides "in certain improvements and combination's of parts, all as will Ice-hereinafter more fully 'describecL'the novel features being pointed out in theiclaims'at the end'of' the specification.

In the drawings? I I Fig. Us a top plan view of a machine embodying thepresent invention with the parts shown in p'osition to receiveacarton blank; 1

- Fig. 2 is an end elevation ofthe machine as viewed from the left in Fig. 1;

Fig. 3 is a fragmentary view 01 the carton handling parts'shown in Fig. 2 with acarton .blank applied thereto; a

.1 Fig. 4 is a top plan viewof parts shown in Fig 3, including theblank to be folded;

an I

" Fig. 5 is a perspective view of a carton folded by t a the machine; I

- Fig. 6 is an enlarged top plan view similar to f Fig. 4, but showing the carton partly 'foldedi' v i Fig. 7 is an end elevation, partly broken away, as seen from the left in Fig. 6; t

Fig. '8 is. a top plan view, partly broken away, f si'rnilar to Fig. 6, but showingthe further stage of folding;

Fig. 9 is anend elevation as viewedf frorn theleft in .Fig. 8';

Fig. 10 is'a view similar to Fig. 9, but showing further foldingof the carton;

. Fig. 11 is a top plan view-showing the final ,folding step i Fg. 12 is an enlarged sectional elevation on, the l i nel2--l2inFig.1; i r

carton in: a

Fig 13 is an end elevation as viewedfro mthe left inFig. 11;. i

V Fig. 14 is a sectional elevation showing the folded carton ready for removal. fromhthezma chine;

T Fig. 15 is a side elevation substantiallylas seen from the left in Fig. 9, and showing mechanism; r Fig. 16 is aview similar to Fig. 15 substantially asseenfromtherightinl 'ig.9;:

Fig. 17: is a sectional:elevation onthe line I l l 1 the driving in Fig. 15;showir'ig1the mechanism foripperating one'of the blank. folding wings;

' Fig. 15, .showingmechanism for operating .the

blank folding arms.

The invention provides .a machine particularly adapted for erectinga carton such-as disclosed in my said patent application and here illustrated as a blank in Fig. 4 and in erected condition in -Fig. 5, comprisinga. bottom" 3llfand upwardly folded pairs of opposite side walls 3|. and .32 and '33. and 34. The adjacent side walls at each corner of the box are integrally. connected by folded-corner webs or flaps to '38, inclusive, which. are

.each 'foldedmedially as at 39. Flaps 3B and 31 have on their outer wallstopextensions 40 and 4| which are folded over inwardly and downwardly :between the flaps and the adjacentside walls-3| andz32, the lines of fold having therein slots 42 adapted to receive and interlock with hooks 43 .formed at the tops of the innerwalls of theother corner flaps 35 and 38, respectively. -,Each;; hook '43 has an, undercut edge -44 which snaps over the endv of the corresponding slot 42,;so,as tointerposition. A ,fluid tighticarton is thus provided with bottom and side walls having continuous,

- folded, leakproof connection with eachother be- Theembodiment' oi the invention hereindisclosed; by way of illustration. comprises, prefervbearings 41 supporting. the ,end portions of an.

support a pair of spindles 54 and 55 extending parallel with each other along the opposite sides of support 49, as shown. =-A pair of-wing's '6 and 51 are mounted on the"'s'pindles, -respe'ctively,

for oscillating movement from the substantially 1, up to and somewhat beyond a vertical position, as shown in Fig. 9, each wing having 'for' this' Y purpose a plurality of knuckles rotatably embracingits spindle. Th'e'wingsareraisedeand lowered by mechanism connected therewith, and .the spindles F54 and 55 are separately oscillated for actuating certainother :parts, 2315' hereafter described.

351 -Ffor raising ear-ton wall 34,?ha's brackdis "5% fixed on its opposite ends i and supporting a pair of plates each having an edge turned'to provide an elongated abutment :59, Figs. .1 to 3, inclusive, in fixed relation with the' wing. Wing 51 is provided also alongzitsifree iedge with-three spaced 'guides 60, ='-6l,-iand $2, Fig. l, in the 'form of U-shaped clips each-fixedsat one'endCFig. 'to theba'ck of "the Wing and having its oth'er' end l5 horizontal, blank receiving position shown ln Fig pivotally .connected with one end of -a link -82 projecting around over thezupper face of the wing in spaced 'relatio-n thereto, to receive and position one edgeof the 'bl'arikflascshownin Fig. 4. Guides $60 and 5152 carry curved -'fi- rrg'er extensions 63 and 64 for-guidingtheiblanktoposition.

'Wing56-has :axpair of upstanding guide brack-.

ts '95'atits 'outer- 'edge :to locate and hold the opposite edge of the blank, 125 shown .in .Fig. 4.

*It is evident from the above construction that -''a blank maybe readily slid into place on support :49 an'ditswinglextensions '56 and 5.1,:lwith one edge' bf-theiblank under the guides 60ato164, in-

WardIy'somewhatabove the top surface'iof the wing 'and' under :the corner fo'ld silaps wsand 3 1, -"support" these corner folds and' the side "walls 3l and 32 atan initial-upward inclination toinsure pr'oper folding ofsuch parts when the Wings '156 and- 51 are raised.

'Wing =51 has fixed-thereon -a bracket tfi 1'1, pivotally connected with one 'end of a li-nk'.:61,rthe other end of whichis pivotally connected with a lever 68 which rocked by the operating rne'chariism hereafter described, to raise and lower th'e' wfi'ng. Wing 55 has fixed thereon' a'ibracket 69, Fig. 1 9,-p'ivotally '--connected with c ne-end o'f alink "10, the other end of which is-pivoted to a l lever '11 which is To cked' by mecl ianisrn here- -"after descr ibe'd, to' swing the wing timed coordinati'on with wing-'51, 'so that the "wings'are raised fromthe substantially horizontal position "shown' in :Fig.- 2-to the upwardly inclined position "shown-in Fig, 7 and eventually to theposition "shownin Fig. 9 'in'which they are'irrclinedseinewhat inwardly toward each oth'er. such movement, the wings fold the side Walls 33 and 34 upwardly and fold the corner folds outwardly, thereby folding the side walls 3| and 32 upwardly, assisted by the pressure ofthe abutments 59 on wing 51, so as to position the parts of the blank as shown in Figs. 8 and 9. The final inward inclination of the wings 56 and 51 tends to compress the carton and bulge the sidewalls 31 and 32 inwardly as indicated at '12, Fig. -8, thereby tending to incline the tops of the corner folds inwardly and downwardly, when in their fully foldedposition against the side walls, to assist in ngaging'them with each other, as more fully described hereafter.

i The means'jior tolding inwardly, engaging and interlock-ing the corner flaps with each other in pairs, comprises preferably a pair of rounded tucking fingers '13, Figs. 1, 9, 11, and 15, one at --'-ea"ch end of wing 51 and fixed on the opposite ends of a shaft 14 rotatably mounted in bearings -fl5 on the =under side-,of the wing. Fixed on shaft 11:4 isaa, pinion--:1:E;-Fig. 11, meshing with a spur gear. 11 fixed-on -a short shaft 18 journaled in "bearings 19 :on the wing- .Fixedpmshaft "is an ;-arm "89, Figs. 1'1 and I5, pivotal-1y connected with oneend ofa link 8| having its'other end tweenthecorner folds and the adjacent side walls of .the carton.

As the fingers 13 descend, they-qgn'ess' the: extensions and the-corner folds-:36 and 31 between themandsthefixed abutments 59 of the wing, so asto 'bowthe'corner folds outwardly, raising andretractingtheouter ends of their foldedi:p0rtions a sjndicated atr84, Fig. 10, in slightly spaced relation with extensions 40, thus l positioning .theseporner folds, and their in-folded extensions -40, etc-receive between them the cooperating corner folds-35aI-1d 38 which are folded inwardly :for that gpurpose-xby means-which will now be described.

- {lhemeans forcornpleting'the inward folding hand interlocking"of the corner folds 35 to 38,

inclusive, comprises swinging arms *preferably smounted at the-opposite ends of both wings 56 mounted on spindles 86 supported-on the under -sides of the opposite ends of wing 5-6 and extend- "the arms to apo sition in which they are inclined somewhat upwardly in the horizontal position of -"the wing, as shown in'FigJ 2, to assist thea'butmentsss' in initiallypositioning the blank in the machine as described above. Actuating means "areprovided 'for the arms 85, operated after the fingers 13 have positioned the corner folds36 and-31,*as described-and"as shown in Fig. 10,

to press the arms 85 and corner 'folds"-35-and 38 "'inwar'dly 'so as "to engage the ends of thefolds between the corner folds 36 and 31"-and their down-ward extensions' 'lm. 'fiuch actuating means preferably comprises a pair"of"firigers"88,*Figs. 1, 7, 9, and 13, fixed on the opposite ends of the bpind-le 54' of tl'ie wing, respectively, their spindle being-actuated .by' an extension 89 on one ofithe fingers; Fig; 20, pivotally connected with one end of a link 90i havingaits otherzend pivotally-conis rocked by: the operating mechanism. l g; r15 Me'ans fi'are provided" .for pressing inwardly, alining and interlockingthe corner folds of each pair, comprising, preferably, .a pair of arms, Figsil, .6,.and.l1,1 in theform of resilientarms or clips each fixed on an arm 93 pivotally mounted on theJ-rear .fa'cet'o'f wing-k51 about av pintle94 extending. transversely .to the pivotal. axis of the wing. Each arm 93 'has'ai'reversely bent extension 95 in'clined t'oC-the active-portion 92;: of thearm assembly; for zco'operationiwithp a roller .96.; on a spindle: 91 fixed *atrits .lower: end to an arm 98, '-pinned*to*-the spindle 55 .on which the, wing 51 -:-is mounted: I Arm 98 is Jpivotally connected with one end of atlink 992pivotedat its opDOsite end -'to the' upper end of a lever I mounted onthe frame and rocked by the operating mechanism. tension spring 1 ID I, Figs; B and 9, is connected between the outerend of-spindle, and aipost prises preferably a cam I08, Figs and 17,, fixed .on. shaft :48 and coacting with a roller I 094011- leyer :68, the roller beingheldin contact with: the cam the same time or shortly before thetucking lfingers '13 are raised; asfshown in Fig. 13, to free the corner folds 36Iand131, leaving them inclined "iipwardly,as shown-in Fig;:l0-, While-12118300- operating 'cornertfolds 35. ,andy 3;8 are in lined somewhat downwardly, .as described. In ;such positions the top hooks43 at the innehzends of the latter folds are readily engaged beneath the line of folding betweenthe 'corner folds 3.6 and 31 and their inturned extensions 40. As the, arms 92- are pressed inwardly, they. straighten-out the -bowed f01ds36'and 31-,pressing thefolds of each pair inwardly into substantialalinement with,

eachother', in whichlposition the'hooks'43 enter 'theslot's 42 at the tops of the cooperatingields, tointerlock'themwith eachxother. 1; i The several parts, including the; wings 56 and -51, are then returned to initial position, releasing the pressure of the wings on the sidewalls .33 "and 34 1 of the carton; whereupon. the inwardly bowed walls 3I and 32.: straighten outwardly and draw theho'ok's 43 against'the ends of the slots -42. 'Theundercut portions 42. of the hooks are Ithus'brought to project over and wedgingly'interlockwi'th theends ofathe slots and securelyfasten the corner folds together and the carton in erected "condition. a I

The "remaining mechanism" for operating-the several parts preferably comprises-the oscillating *s'haft 48 described above anda plurality. of cams fixed thereon and each provided with a follower 'mechanism; for operatingthe several parts of "the-machine. The shaft thuscarries a camI03, Fig's. l and 9, coacting with a roller I04 carried by lever I00 for oscillatingspindle 55 :and the rollers 96"which press in the side arms 92 as described-above. A tension spring I05 has one end fixed to the lever and the other end fixed'to a spring supporting bar. I06, Fig. 2, carried :by cross "arms I01 mounted on the pedestals 46 ofthe frame'the spring servingto hold thefollower III I in contact with the profile of the cam;

fingers are mounted.

by means of'a spring IID fixed at one end of the lever and at the other-to a bar II I; carried;. ;by the cross arms I01. As previously;described-letter 68. isconnected with wing 51 to swing-tn wing up and down under control of thecam;

The mechanism for operating the fingers 13, :which fold inwardly and downwardly the exten sions and M of corner folds 3B and:31,-,com; prises preferably a cam I I2 fixed on shaft 46,-Figs, .5- and l8, coacting with'a rollerII3 onthe leyer 83, the roller being held in contactwiththe cam by means of a spring II4 fixed atone end tothe lever and at the other end tothebar I I I thecam .described to oscillate the shaft 14,-on which he @The mechanism for operating the wing r folding upwardly the carton side wall-;33 ;.com-

-prises preferably a cam II5 on shaft 48,;;l?igs. 1 5

and 19, coacting with a roller H6 on theleyer H, the roller being held in contact with the cam by a spring I I 1 connected at one end to the lever and at the other end to the'rod I06.- The mechanism for operating the arms ;85,for

folding in the corner folds'35 and 38,. omprises preferably a cam II 8, Figs.- .1 and ,20, fixed;on shaft '48 and coacting with a roller- I I9 onwthe lever 9| having a link and arm connection with the spindle 54 carrying the fingers 88, for-actuating the arms inwardly to fold the corner folds in,- wardly at the proper time: A spring I20 is connected at one end with the lever and at its other .end with the rod I06, the cam operating, through the connections described, to-swing the wings to press in the corner folds'atthe proper time.

V In .the present embodiment operating-shaft is preferably rocked manually-by meansyofga crank lever I2I and handle I2 2,-F igs.,-1, 2, and.l5,

the frame being preferably provided with upper "and lower brackets I23 and I24 serving as stops for arresting the crank in its extreme positions.

It is obvious, however, that such manual operating means may be replaced by a motor dr iven mechanism, 1

The operation of the machine has bee plained in connection with the above-description of itsconstruction, from-whichitis evident j'that a blank may be readily fed-to the machine so as to lie with its bottom section on support-49 and one pair of opposite sidewalls on wings. 56

corner folds about their median lines 3 9..to force them outwardly and force inwardly and raisethe other pairof side walls, 3I and 32', to a position bowed somewhat inwardly beyond the vertical, as shown in Fig. 8. Continued rotation offthe crank then causes the fingers 13 to swing inwardly and downwardly against the upper edges of the-topextensions 40 and 4| of the corner f0lds 36 and 31, as shown in Figs. 8 and 9, so as to fold these top extensions downwardly between their corner folds and the side walls of the'carton, as shown in Fig. 10. In this folding step, the flapsand their extensions I are bent or bowed outwardly and somewhat raised and separated, as shown, sothat inthe extreme lower position of the fingers 13, .shown in dotted lines in Fig, 10, the corners. of

the cooperating flaps 35 and 38 may be: readily .e srsniia entered between the flaps as and at andntheir in' -folded top extensions. Asshownin ftill lines, Fig.- 10, the fingers-are rising, .allowing the flaps 36 and 31' to straighten somewhat "after "their folded portions have received the ends" of -the cooperating-flaps 35and 38. i w

"Continued rotation of the crank swingsfn wardly the presser' arms or clips 92,-"Figs.=11-=an'd 13, to' further straighten and-aline the engaged corner folds andinsert the hooks 43 in their slots fl. On further rotation of the crank the "fingers 88- andthe arms =92- -areretracted, the wings 'sfi and areswung downwardly to horizontal position,' releasing the carton'walls' 33 and B L-and allowing thewalls 3i and 32' to straighten-and swing outwardly, thus forcing the undercut edges of the hooks into secure locking engagementwith -theends of their slots. Thecarton then remains with one of the closure flaps under the-positioning guides 60 to- 64, inclusive, rest- 'ing'on wing 5?, as shown in Fig. 14, in condition to-be'readily slid out of engagement-with the lo catingguides and removed from the machine which is then ready for repetition of the-opera tion. v

The machine is'thus adapted to quickly erect the sidewalls with their outwardly extending corner flaps and to efliciently bend and; position the corner folds for--engagement one within the folded portions ofthe other and to interlock them securelywith one another to complete the erectionof the carton, The machine is'adap-ted to readilyreceive the blanks as they are' fed to it and presents the folded cartoninconvenient position for removal from the machine, theentire operation being rapidly; precisely,--and accura-t'ely performed.

It will thus be seen that the invention accompllshes' its objects and While it has been herein disclosed-by reference to the details of a'pre --ferred embodiment, it is to be understood that such disclosure is intended -in -anillustrative,

--ra therthan a-limiting sense, as it is contemplated .that various modifications in the construction and" arrangement of the parts will readily occur "15A machine for folding a'blank to forma fluid tightcarton of the type having a bottom, up- 'wardly: folded side walls, corner flaps foldably connected with adjacent side wallsand folded ando-verlapped in pairs against the outer sides of "one pair-of-opposite side wallaand intere'ngagin'g means on said flaps, respectively, for'locking'the flaps of eachjpair together, said'machine-com- --p'risinga-supporh for said carton bottom,wings mounted to swing atopposi-te sides Ofs'aidSu-p- -port-fbr-folding the other pair of opposite sidenfin walls upwardly and said corner flaps outwardly an'd'thereby folding the first mentioned sidewalls -upwardly, devices movably-mounted on said wings for moving the flaps of each pair into interlocking "engagement with each other, and mechanism fort-.65 operating the parts of said machine.

=2. A'machine for folding a blank to'form a'fluid tight carton of the type havinga bottom, up-

*wa1"d 1y'folded-side walls, corner flaps fold'ably :connected with adjacent side walls and folded-.1 :and overlapped in pairs against the outer sides "of-one-pair of opposite side wallsand interengag-i'ngdneans on said flaps. respectively, for lock- 1 ing the-flaps of each pair together, said machine comprising a: support for said'c'arton vbottomw, .75

wlngsaepivoted'.ltovswingaabout .parallellaizes errorposits sides: of said support, respectively; for: folding= themther pair of opposite. side. walls upwardly and sai'd 'oornenflapsloutwardly and thereby folding the first: mentioned. side: wallsv upwardly, devices pi'votallysmounted. on said wingsto swin alout axes extending transversely of. the pivotal axes 'of said Wings; for. moving: the; flaps ofeach pair-into lcckingzlengagement .witheach other, andrnechanism for." operating the parts of said machine. I J v A' -ma'chinefor folding ablank to form afiuid tight -carton of thefltype having arbottom, upwardly folded sidewalls, corner flaps foldably F connectedwith-adjacent. sidewalls .and folded and: overlapped inwpairssagainst the outer sides er one pair of opposite side .walls,.one flap of; each pair' having folded-portionsreceiving therebetween the other flap-of the same'pair, and interengaging ::means. on :said-v flaps, respectively, for locking. saidiflaps of each pair together; said machine comprising means for folding said'siderwalls upwardly and said cornerfiaps outwardly, devices forabowing the first mentioned flaps outwardly to retract andflposition the outer ends of said folded portions'thereofi to receive the ends of said other flaps, means for engaging said other flaps between .the-folds-of the firstmentioned fiapsandfor interlocking -said inter-engaging means, and mechanism for operating the parts of said machine,

' 41A machine for folding a blank to form afluid tight-cartonof the type having a bottom, upwardlyfold'edside walls and corner flaps foldably conne'oted with adjacent. side walls and folded and 'ove'rlappeddn pairsagainst the outer sides of one pair of opposite side walls, one flap of each pair having a-top extension f-oldedinwardly and downwardly over the; top ofthe other flap thereof with a slot-in the line of fold ofa'thefirst mentioned flap andsaid other flap having @a, top 1 00K for interlocking engagement. with saidslot, said machine comprisingmeans for fold ng said -,S d8 walls upwardlyi and. said corner flaps outwardly, devices for foldingasaid' "top extensions: inwardly and downwardlylrandfor bowing ,the. first mentioned flaps outwardly-toretract and position the outer-folded ends thereof: to receive the ends of said other flapsgnmeans for'engaging. theputer ends 'of said other flapsbetween said folded portionsi of the-first mentioned flaps: presser arms forstraightening said flaps and interlocking said 'tllOOkS WilFh said slots, and mechanism for operat-ing theparts' of said machine.

connected withaadjacentl side ;.walls and folded and overlapped in pairs againstthe outer sides-Jof one pair of opposite side walls, one flap. ofeach pair having folded portions receiving-therebetween the other flap of the. same. pair, and, interengaging means on said. flaps, respectively,.- for locking said ilapsiof .eachzpair' together, said machineicomprising means. for folding said side walls upwardly; andzsaid corner, flaps outwardly, relatively movable devices for oppositely engaging and bending s'aid'first. mentioned flaps to position the outer ends of said folded portions thereof to receive the'ends" of said otlier;;fiaps,.1means' for enffirst :mentionedzifiaps and: for interlocking said uinterengaginglmeans; and mechanism,- for operz ating. the parts; ofsaid-.machine in timed coordigagingzsaid iotherjflaps between. the folds of the nation with each-rather.

' tight cartontof the type having a bottom; upwarde v ly folded sidewalls, corner flaps foldably acmnected with adjacentside wallsi andirfolded and overlapped in pairs'agai'n'st themouter sides -of one pairof opposite side walls, one :flap' z of each 1 pair having folded portions receiving'z therebetween the -other-flap of th same pain-"and interengaging means on said fiapspzre'spectively, for locking -said-flaps of: 'each pair .together,.said machine comprising means for folding said side ;walls upwardly and saidcorner flapsfoutwardly; devices for oppositely engaging thlfirst mentioned fiaps and positioning the outer lends ofsaid folded portions' thereof: toreceive the ends of saidzother flaps; means for engaging saidzother fiapszbetween the folds of the first'men'tioned flaps-means for laterally engaging andv alin-ingisaid engagedflaps ""to' interlock said interengaging m'eans thereof,

and mechanism for operating' 'thepartslof said machine in timed coordination'.with each other.

7; A'machine for-folding 'ablankto-formafiuid tight carton of the type having abottoin, upwardly folded side walls and corner flaps foldably; connectd with adjacent side'i'walls'andfoldednand overlapped in pairs against the outer sidestof one tively'movable devices-for folding-said top-extensions inwardly and downwardly-and. forposi tioning the first mentioned fiapstoreceive the ends'of said other fiaps, -meanstfor engaging the :ends of saidother flaps between said folded-sportions of the first mentioned flaps and for interv locking said interenga'ging means thereofsfand mechanism for-operating the'partsaof saidg- -machine in timed coordination With each other.-

38; A' machine 'forxfolding a blank ,to'form a fluid tight carton; of the typeuhaving; a (bottom, upwardly folded side wallsan'd corner, flapsfo ldably'connected with adjacent -,side .walls'; and

folded and overlapped: inpairs' against; thQiOU-tfil sides -of oneipair of opposite side walls, one fiap F 'of each pair having atop extensionfoldedwiniwardly and downwar ly oven theit pof :the -othen 5g beach-pair having atop extension folded infiap thereof j with a :slotf in :the -line,; of-*foldof the first mentioned fiapand said-othe fiflapihavring a tophook for interlocking engagement 'with said slot, said machinecomprisingmeansfor folding said side walls upwardly and, saidcorner flaps outwardly, relatively movable. deviceswfor engaging oppositewsidesiof the first mentioned flaps to fold said top extensions thereof inwardly and downwardly and to-bow said fia-ps outwardly to position the outer folded: ends; thereof to; re

ceive the 'ends of said" other flaps; arm movable laterally ofsaid flapsifor engaging said other flaps between said-foldedzportions 'of the first mentioned flaps and to interlock said. interengaging meansrto secure the flaps of each pair together, and mechanism for operating the parts of said machine in timed: coordination with each other.

upwardly folded" side walls, corner flaps foldably connected with adjacent nside walls and folded and overlapped in pairs agains't the oute'rsides of one pair of opposite sidewalls", one paper each 1-;locki-ng said :fiapsof each pair together, said -;.machine comprising s-assupport' for said blank, 5 wings. pivoted to swing about parallel axes at {opposite sides of said support, respectively, for

folding-said} sidewalls upwardly and said corner :flaps ,outwardly, devices pivotally mounted on done. of said wings to swing about an axis parallel iog'with said wing 'axisfor-bowing said first menione'dflap outwardly to retract and position the .uter .ends of said folded portions ;thereof=- to re ceive the endsof said: other-flaps between said gvfolded portions, means for engaging the fiaps of 15 .eaoh pairwitheach other, tointerlock said interengaging means, and ;,mechanism for operating ithe- .-part ;of-said machine l 10-.;;A-machine-for folding-a blank;to, form a fluid; tight cartonofthe type having a bottom, 0 upwardly folded; sidewalls, corner flaps foldably connected with adjacent side walls and folded and overlappedinqpairsagainst the outer sides ;ofonepair of opposite side walls, one flap of each pair, having folded portions receiving therebe- 125 tween the other fiap of the same pair, and interengaging ,l-means; on: said ,flaps, respectively, for

,1 locking said-flaps ofieach pair together, said machine comprisingra support :forsaid blank, wings ,pivotedto swing about parallel axes atopposite 30 sides, of; -said -support-, respectively, for folding saidside' wallsxupwardly and I said corner flaps -outwardly,- devices pivotally mounted on oneof said wings-:to swing-about anaxis parallel with ,-;said wing axis'for'bowing said first mentioned age-flaps outwardly to retract and position the outer ends-of said foldedportions rthereofv to receive theends of said 01 1161, fiaps between said folded port i ons,: devices pivotallymounted on said wings to; swing-;ab out axes transverselyfoysaid wing .m axesfor-engaging the flaps of each pair-with :eachother-to interlock-said interengaging means,

i-g;and;; mechanism5for ,operating'the parts of said '--machine.;-

Am on mdin a blank to form a fiuidftight carton of the type having a bottom, upwardly folded sidewalls and corner flaps foldably, connected with -adjacent=side walls and folded and-overlapped in pairs against the outer ides of one pair of opposite side walls, one flap ward1y and downwardly 'over the top of theother ap-,. thereof --with. a slot in the line or fold of xes; at opposite sides of said support, respecvelyyfor folding said sidewalls upwardly and said; corner folds outwardly, devices pivotally 6;),:njiounted on ,one of saidwings to swing about an axis parallelwithsaid (wing axes,-for folding said 1110p extension inwardly and downwardly and for owing, said first mentioned flaps outwardly. to r etract and positionthe outer folded ends thereof (i5 ,.-,-t o receive the-end loflsai'd other -fiaps; means for ngaging thelouter ends of saidother flaps been thev fo1ds .;of- ,thefirst mentioned flaps, resser. arms forlstraightening said fiaps and int m r n said hook withnsaid slots, and mech- 7 anism for operatingthe parts of said machine.

,12. Allmachine forffoldinga blank to form a :tflu ii:tight.#carton ofthe type having a bottom. upwardly foldedside walls andcorner flaps foldably connected with adjacent side walls and pair having folded portions receiving therebe gsjfoldedrand; qverlapped; in pairs against the outer n trogen "-11 12 -=-'sides-of one pair of opposite side 'walls; one*flap wrendsitofs-saidz otherziflapsvarmsi mounted: onzthe **ofeach pair having atop -extension folded: in- :ends;ofe-said wings toiswing aboutjaxes'transverse a top hook for interlocking engagement with "for said blank, wings pivoted toswing ab'o'ut 'wardly and' downwardly over the top of theother nto saidnwin saxesato; iold'qand press the-flaps of flap' thereof with a'slot in the line of fold of the neach -pairiitoward said side walls to engage a fiap "first mentioned flap andsaid other flap-having; 30f eachipaiinbetween the folded (portions ofdthe herfiflapithereofiand;to::interlock said hooks-:in said slots,tand mechanism for operating the parts frsaidnmachine. parauei axes at opposite sides of said support, .iilfiatAufmabl'linei for folding a blankto Viorm a s'aid slot, said machine comprising a sizpport respectively, for folding said sidewalls upwar'dlyi io ifiuid ti h ar nbf hey e h bot aridsaid corner flaps outwardly, spaced'abxitiipwardly'...folded=iside walls ntcorner fiapstfoldments-on oneof said wings for engagementwith i'ably iconnejcted with; adjacent" side :xwalls and "ha'v'ing said abutments'to swing about an '-axis parallelwith the axis of said wing for'cooperai ti'on -withsaid :abiitme'nts' to foldsaid top exfirst"mentioned flaps outwardly'to retract and -said fiaps,- d'evioes pivotally mounted on the wlng ioldedzandxoverlapped'in'pairs against, the'outer desiof zone pair of oppositeside walls, one'flap fie :each L-Fpair rihaving vfolded' portions :receiving herebetween" the io'thertfiap :of-gthe same pair, rzandsinterengaging: means on said flaps; respecvely; foralockingsaid flaps'of each pair together, saidtma'chine comprising a support for said blank,

tensions inwardly and downwardly andbow -s'aid position the outer ends: ofs'aid first mentioned flapsi-means for foldin said other flaps inwardlyi: 2o*- gs"mountedttoswing a nu p v5 and engaging and pressing the outer-ends therepp i de 0f =Snidi"Supp0rt,' respectively, for

1= of between the folded portions ofthe'firstmen- 6lding..:thei0ther p'a rxo f pp d wa up- -tioned flaps-to interlock said hooks "thereof with wardlyand said cornerfi'aps outwardly and there- -r id's t andtmechanism for Operating-311811331133 byi fol'ding rtheffirstramentioned side walls :uD-

. -ibf aid gchi f waltdlyyimeans for :folding za' flap of each; pair 13. A machine' for folding a blank to form a fiuidtig'ht carton of the type'having-abdttom, upwardly folded side walls and corner fiaps'foldther'eofi inwardly; arms pivot'allysmounted onone fii=said wings1 td 'swingii aboutran': axis" extending ransversely to '-said 'wing "axis 'for' 'folding' vthe "a ly connected with adjacent side walls and p' c pairinto en With the '.-folded and'overlapped in pairsla gainstlthe Outer?a msfirst :mentionedrsfiap thereof, -'means pivoted-.1 to

first mentioned flap and said otherflap ha'vingzigs sides of one pair of opposite side walls, one flap swlngznboiit said rwing -ax moving Said arms,

of each .pair having a top extension" folded in- "*armfimeans 'fvliiipl'essing p of'-fi p i wardly and downwardly ov'eithe top of'the other y=' 0 r o k i er n n means 5,.flapithereof'with t-m t line f {01d of t 1 ':thereof:.:.-and-mechanismafor .operatingtheeparts machine. forii'f'ol'ding a? blank to. form a top hook for n a ement with said slot, said machine comprising asupport for said i ght carton:-ofiithe typwh avbdttom, ljiblank," wings p'ivoted to swin -"about parallel -upwardly folded-sidehwallsand corner'flaps-foldaxes at opposite sides of said's'upp'o'rt; respectively, -ably gonne te withadjacent side walls and for folding' said side walls upwardly 'and-saidh46 o fipli 'p a 'o l =-"cornerfolds outwardly,- devices pivotally mounted 119116" P Of opposite sidewalls, fi l. non f said wings to swin about an""-a.XlS of: pair having?a--top extension folded-tinparallel with said wing axis for folding-said wai dly and downwardly'over p of the other top'extensions inwardly and-downwardly and for fifialiitheliebfiwith' W810i in the line" of foldof the bowing said first mentioned-flaps outwardly'to/ 5'=first= 'menti-ohed flap and said otherv fl p av retract and position the outer folded ends "there- D erl g n em n w h a of to receive the endsof said other flaps, devices OE Said machine comprising-a support forrsaid pivotallymounted on saidwings to swing-about dig-blank, w -m t w g at' pp sides axes 'trans'yerse to *said i wing 1 axes, for pressing s'aid suppoi't for folding/the other pair'of 'side 1 said fla'ps toward said sidewalls to engage the walls-*-upwai dly and-said corner'flaps outwardly Y fla-ps' ofeach pairand interlock said hdoks with and thereby folding the first mentioned side walls said-slots, and mechanism for op'erating the parts =-npwari1ly,'-fi s p yu on of of said machine. said-'-"wings"nfor"efolding said top extensions in- 14; A machine for' folding a blank to -*form a f d w y a d or id-fi d' t ca on of the typhaving a bottom-,1 mentioned flapsoutwardly toposition the outer pwa y folded side walls and corner" flaps foldfoldedend's 'thereof for receiving-the endsof said ably connected with adjacent side walls and D fl alimsilfiivota'llyi mounted 011 d folded and'overlapped in pairs against the outer W r pre ing said-' flaps togeth r o n a e -sides of one pair of oppositeside walls, one n dfi p "betweenithe folded P O p 9 each pair having a top extension folded m the' first'm'entioned flaps and-interlock said hooks inwardly anddownwardly oventhe top f -th im said' slots a shaft havingoperating connecother flap'thereof with a slot in 'the'line of fold -"W Wings, fingers a d a a of the-"first 'mention'ed' flap and said other flap means for rotating said shaft to operate said mahaving a top hookfor interlockingengagement chine D wi lih s aid "sl'otj'said machine comprisingasup-= 05 WILLIAMI-IJ'INMAN.

-pitfforsaid-"blank; wings mounted toi'swing j about parallel axes at opposite sides or said sup- ""QREFERENCESKCITED p respectively, Spaced 'abutmenfiS'fiXd 0I1'0I1e The following references are of recordin the fingersjpixfotally mounted on "the wing 'having 79 said abutments to"swing about an axis parallel STATES: PATENTS with saidfwindaxis for 'cooperation*with*sald "iliNumber I t fixed'abntmentsio fold s'aid tDn'extensions-in- V ghafer etal Mar. 3 wardly and downwardly and bow saidfirst; men- 'i urmw O

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