US1511693A - Machine for making tubular containers - Google Patents

Description

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@ct .M 1924@- J. D. WEBBER xvlAcHINxi: FOR MAKING TUBULAR CONTAINERS 5 Sheets-Sheet 1 Filed June 13 |922 J. D.'WEIBBER MACHINE FOR MAKING TUBLAR CONTAINERS Fild June- 3131922 5 she-'ets-sheet s Y mum N 7 1D. wnnBnR, or BAYONNE, NRw JERSEY, AssrsNoR 'ro rN'rnfRNarroN ran COMPANY, A CORPORATION or Naw Yom;

MACHINE FO'R MAKING '.LIIIBTJLAR` CONTMN a Application led June 13, 1922. Serial No. 567,961.

To all whom t may concern: Be it known that I, JOHN D. WEBBER, a' citizen of the United States, residing at Bayonne, in the county of Hudson and State b of New Jersey, have invented certain new and useful Improvements in Machines for Making Tubular Containers, of which the following is a specication, reference being had therein to the accompanyingV drawin s. This invention relates to machines or making tubular articles, such as paper cartons or receptacles, and the invention consists of certain improvements in the type of machine set forth in an application filed by 1.5 George W. Beadle on the 5th day of May 1920, Patent No. 1,444,096. In the machine of said application, a series of mandrels is mounted on a suitable carrier which is rotated step by step, so that the individual mandrels will be presented in succession to blankextracting and feeding mechanisms, blank Winding mechanisms, blank spinning mechanisms, bottom forming mechanisms, and `an ejector mechanism for ejecting the finished carton fromthe mandrels. the said several mechanisms being formed and coordinated in their operations to wind on each mandrel two blanks, one upon the other,"

and seat a bottom within the lirst wound blank and a second bottom against the first bottom and within the secondwound blank. In said machine the two blanks are extracted and fed Ito the mandrels respectively from two blank'holders situated at opposite ends of the machine, and in their passage from the holders, the blanks are supplied with adhesive to cause the convolutions of the wound blanks to adhere to each other.

The object of my invention is to provide means for holding or clamping the seams of the wound'cemented blanks on the mandrels, so that the seams will have time to dry. suficientlyto prevent loosening or separation of the seam surfaces during the operation of the machine in forming the cartons. With this and other objects in view my invention consists of a presser or clampin member associated with each mandrel an operated to successively clamp or press the seam of the blank after` it is wound'into a tube upon the mandrel.

The invention consists also of means associated with the presser device, to guide the blank around the mandrel in the'winding operation. l

The invention consists also in the details of construction and combination of parts hereinafter described and claimed. The im.- proved features constitutin my invention will be described in the detai ed specication to follow, and the novel parts thereof will be pointed out in the appended claims.

In the accompanying drawings; i

Fig. 1 is a side elevation of such the machine of said application as will be parts of necessary for an understanding. of my invention.

Fig. 2 is a View showing the carton` in its,y

di'erent stages, of formation.

Fig. 3 is a fragmentary view, in elevation, of the mandrels, their carrying spider,

and the associated parts, with my invention embodied therein, certain of the parts being,

omitted.

Fig. 4 is a side elevation, on an enlarged scale, of one of the forming mandrels having my improved seam clamping device 'drel with the two blanks wound thereon and with both seams held by the clamping device. Fig. 8 is a side elevation of the blank winding rollers, showing in dotted lines the relation thereto of the blank guiding members.

Referring to the drawings:

Referring to Figs. 1 and 2, the tube or carton formed by the machine as set forthy in said Beadle application, is made up from two blanks A andB'which are wound one around the other on each of a series of forming mandrels C on a step by step'movable mandrel-carrying spiderl D, with the convolutions of the woundblanks cemented together. In the formation of the carton, ,a blank A is first` fed from a pile of the blanks at the left of the machine Fig. 1, to' theY mandrel at position No. 1, in which feed,

blank by an adhesive ,applying surface E on a rotary drum F. As the advancing end of the blank reaches the mandrel at position No. 1 it .is coiled around the mandrel by o posing rotary winding rolls G, G, mountpermanently in the machine at this point,

the veffect ofthe winding operation being to coil or wind the blank around the mandrel in two convolutions cementedto each other and formin a tube presenting a straight Iseam exten ng longitudinally from end to end. The blank thus wound is shown at 1 Fig. 2. The mandrel carrier now advances one step and presents the mandrel, with the wound blank thereon, to position No. 2 Fig. 1, at which point the end of the blank overhanging the en d of the mandrel is acted on the same throughout its extent by an adl hesive applying surface E on a rotary drum the inturned end of wound blanklB as. j shown at 7 Fig. 2 thereby completing the v.permanently in the lmachine at this F', and .as the advancing end of the blank reaches the mandrel it is acted on by opposing rotary winding rolls G', G mounted int the ei'ectof the winding operation being td wlnd blank B around blank A in two coils,

While cementing 'the blanks and .coils `to- 1 gether, whereby a straight seam will be presented extending longitudinally from end to end'of blank B. The form of the wound blanks at this sta e of the operation is shown at 3 and 4 Fgig. 2. The carrier now makes its fourth movement and brings the mandrel to position No. 4, an idle one, and then it moves' further to position No. 5 at winch point a bottom H is b a suitable mechanism (not shown) forme and seated.

within the -end of wound blank B and agalnstthe folded in end of blank A as shown at 5 Fig. 2. `The sixth movement of the mandrel carrierl moves the mandrel and wound blanks to position No. 6 Fig. 1 at which points. second spinning mechanism (not shown) acts on the projecting end of wound blank B and folds or spins the same v inwardly against bottom H to confine said 55 bottom as shown at 6 Fig.A 2. On vthe seventh movement ofthe carrier the mandrel and blanks thereon are carried to position No. 7 Fig. 1' at which .point a suitable mechanism (not shown) acts to form a second bottom l and seats the same within carton, which in thenext andl final movement of ythe carrier, is carried to position No. 8 Fig.1 where i-t is ejected from the mandrel. It will be understood that each mandrel is carried through the above described operations in succession, so that there are a number of cartons .in the machine at one time in different successive stages of formation. The various mechanisms above referred to in general terms are fully set forth and described in said Beadle application before mentioned, to

which reference may be had for a more detailed descrip-tion than is here given, the above general description being sufficient for a full understanding of my present invention which will now be described.

As shown more particularly in Figs. 3 to 7 the presser or seam clamping device comprises opposing clamping ljaws 10, 10, which are sustained by the man rel carrier in o erative relation to the respective mandre s, one set of jaws for each mandrel, and the said jaws are movable to-and from each other so that they ma be opened to permit the blanks to be woun around the mandrel, and then closed on the woundblanks to -press down on and hold thel seam while it dries.' The jaws and associated parts are the same in form and construction for the several mandrels and therefore a description of one set will suice.

The mandrels C consist each in the presentinstance of a4 tubular cylindrical shell having fixed within it ,at its opposite ends, two hubs or discs c-oi' journaled on a rod 11, which several rods are Xed at their inner ends to the mandrel Vcarrier near its outer edge. The mandrel is confined removably on its rod by means of a split collar c2 seated in a peripheral roove in the outer end of the rod and held together by a spring clamp c3 fitting in an annular groove in theLcollar, whereby the mandrel may be removed endwise from the rod when desired. At its opposite end the mandrel is held in position by means of a collar c fixed `to the rod.. The mandrel carrier is fixed to a horizontal shaft 12 mounted rotatably in the machine andhoperated to advance the mandrels step by step, by a suitable operating mechanism such as 1s Idescribed in s aid -application above referred to. Inward `of each rod 11` a horizontal stud 13 is fixed to the mandrel carrier and projects some distance on both sides of the same, and opposing clamp frames 14 and 15 are pivotally mounted on the projecting ends of the stud and have connected to them the two seam clamping jaws 10,10 before alluded to, the relation kof the parts being such that the jaws will beV sustained on opposite sides `of the mandrel. lThe clamp frame 14 consists of outer and inner parallel arms 14a and 14b`mounted at their inner ends yto rock .on the stud 13and a-longitudinal connecting bar 14 is connected Lto the outer ends of the arms. Likewise clamp frame 15 conly respectively from the longitudinal bars imanes sists of inner and outer parallel arms El and 15? .mounted at their inner ends to rock on the stud, and a longitudinal connecting bar 15c is fixed to the outer ends of the arms,

Ithe arms of frame 15 being spaced some disarms 17, 17, one of which is'engaged with clamp frame 14, andthe other with clamp frame 15, the said s ring arms tending to yieldingly holdv the c amp frames apart and the jaws in open position as shown' at the left in Fig. 3. The seam. clampin jaws 10, 10 consist of elongated segmenta shells or casings 18 xed to and extending forwardof the two clamp frames, and the inner concave faces of the shells are lined with some Vsoft yielding material such for instance as sponge rubber-which is cemented or otherwise fastened to .the shells. The inner vopposin clamping faces of the jaws areY thus curve inwardly yor concaved so as to `follow the contour'of the cylindrical mandrel', and they 'entend throughout the length of4 the mandrel on' opposite sides of the same, so that when the jaws are closed on the wound blanks on the mandrel, one jaw, that on the right in Fig. 6, will engage and pressv on the seam of the wound blank Aand the l other 'jaw that on the left in Fig. 7 will w j hanlr B, then` close en age. andpress on the seam ofblank lB.

ctuating means for the vjaws are pro-' vided wherebythey will be closed on the mandrel' after the blank` A is wound thereori-,sb as to holdthe seam ofthe blanlnthen ned vpartially to ermit the windin of a ainon'blank Jil to holdv its seam, and hna ly fully opened to permit the nished carton to vbe ejected from the mandrel. rllhese o erations are automatically performed witv respect to eaeh setv of jaws as their associated' manto employ lthe mechan shown more par-Y' fdle'ls more successively from one position to the other in thel operation of the machine, and any suitable mechanism to effect these voperations may he used. ll prefer however .'tichlarly `in l*`igs. 3, ll-aind 6 where it will dfi he seen that a radially "movable slide plate 19 is located between the outer arms 14W and 15m-of theelamp frames, and isl formed with a lontudinal slot whstraddlingthe stud 13, themandrel su portin rodlll', and a guide roller 20 journa ed on t e outer side of aerod 21 depending from .the outer edge ofthe mandre carrier, the said slide late helngl thus constrained and' guided ra ially e stud, roller and rod. At its upper end the plate carries a horizontal pin 22 which projects' on opposite sidesl of the i plate and which in the radial sliding movements of the plate, engages the inner edges of the upper terminal portions of two roching cam arms 23 and 24 fixed at their inner ends respectively to the outer arms lll and 15a of the twoA clamp frames and extending onopposite sides of the slide plate. These fingers are vurged inwardly towards each other so as to maintain engagement with the pin by the spring 16 in its action in holding the clamping jaws. apart. fingers are each formed on their inner edges with four cam surfaces 25, 26, 27 and 28 arranged one after the other in the length of the finger, and adapted to engage the pin on plate 19 as it is moved inwardly, and :the construction, form and relation of the parts is such that when the pin engages lpass between them and the mandrel in the first winding operation as shown at position l1, Fig. 3. When the pin is engaged with the vcam A.surfaces 25, the jaws will be fully closed on thev mandrel as shown at position 2 Fig. 3. -When the pin `is' engaged with the cam surfaces 27, the jaws will be se arated slightly further than when control ed by the cam surfaces 26, so as to permit the windin of the second blank on' the first wound lank; and when the pin is engaged with cam surfaces v28, the jaws will be permitted to be fully opened as shown at position 8 Fig. 3 to permit the carton to be ejected from the mandrel.

The operation vof the slide plates to bring the different cam surfaces of the fingers into action, is effected in the present instance by the cam system shown more .particularly in Fig. 3. This cam system comprisesa semicircular frame or plate 29 fixed in position in the machine and disposed edgewise in the plane of the slide plates, the inner edge of the frame29 being formed with three cam surfaces 30, 31 and32 in position tobe engaged by rollers 33 yjournaled on the sides of the slide plates at their outer extremities. These cam surfaces' when engaged by the roller 33 will shift the slide plate to such positions as to successively engage the pin v22 with cam surfaces 26 and l25 respectively to first partially close thefjaws at position 1 for The the first winding, and then to wholly close the jaws at position 2 after the first windposition 4 after the second winding. As-

sociated with this semi-circular cam plate i 12o ing, and to again wholly close the jaws at jaw slightly to admit thesecond blank B.

A third iixed cam plate 36 is located at .the ngers and permitting spring 16 to swing the jaws open to their full extent as shown. j j

The operation ofthe parts so far described is as follows. j f

, With'the mandrel at position No. 1, Fig.

`3, and with the seamA pressing jaws parf tially open, as determined by the engagement of pin 22 on slide plate 19 with cam 'surfaces 26 on cam arms23, the blank A, supplied with adhesive, is fed to the mandrel and is wound around the same by thelirst set of winding rollers G, Athe completion of the winding operation bringing the seam of the tube within the area-of one of the seam clamping jaws. The mandrel nowadvances y to position No. 2, during which advance, roller 33 on Yslide plate- 1`9travcllingon the cam surface 31 pushes the sliding plate inwardly and engages -pin 22'with cam surfaces 25 which causes the seam clamping jaws to 'close on the wound blank and press on the seam and thereby hold it against separation.

The mandrel next advances to position No. 3 to receive the second blank B, and in a ong the cam edge of the short cam 34, whereby the slide plate willbe pulled outwardlyand will engage pin 22 with cam surfaces 27` vand will thereby 'o en the `approaching said position, roller 33 rides clamping jaws more widely than t ey were opened at ositionNo. 1,` in order to permit blank In this position 'of the mandrel, blank VB,

with the adhesiveapilied, is fed to the smandrel, and is woun `wound-blank A by the second set, of windthereon around the ing rollers G, the completionvof the windy advances to position@-k with earn surfaces 25, which action will close the jaws on the wound blanks. on'ithe mandreh similar to the closing action at position 2,and the'jaws will press firmly on and hold the two 'seams against separation.

; From t is point o n theadvance of the' mandrel towards Athe ejectin-g position No.

`8 pin v22 will l"remain engaged with cam Surfaes 25, and tliejaws be,mailltalledv carton from the mandrel.

to bewound around blank A.

in closed position so that the seams will be held down during the remaining portion of the period ofv advance', and the adhesive will have ample time to dry before the ejectionY of the finished carton takes place. vIn the final movement of the mandrel as it approaches the .ejecting position, roller 33 will'ride along the outer-edge of cam 36, .and by the time the mandrel reaches the ejecting osition, pin 22 will have become engaged) with cam surfaces 28, and the 'aws will be .opened to their full extent j y'spring 16'. Theejecting mechanism now comes intoaction and ejects the finished In the continued advance of the' empty mandrel to vposition No. l, lroller 33 will engage cam 30 and by the time the mandrel reaches position No. l, pin 22 will have engaged caml surfaces 26 again and the jaws will be again opened. slightly to receive blank A as' before.

It willl be understood that there' isa pair of seam clamping jaws associated with each mandrel, and that each set'of jaws in the complete cyicle of operationpf its associated mandrel, goes through the different operations above described. ln Fig. 3 the jaws` and` mandrels are shown by dotted lines 1n positions Nos. 5,' 6 and 7, to better illustrate the other arts.

From tie foregoing description of the construction and operation of the parts, it will be understood that the point on cam 30 at position No. 1 is such that when engaged by roller 33, the seam clamping jaws will be partially opened to receive the rst blank, and that from this point the cam surface extends at a gradual mward inclination and nally merges into cam surface 31 at position No. 2, whichwhen engaged by the roller will fully close the jaws on the wound blank.

VThe short cam 34 at position No. 3 extends gradually outwardl so as to enga the opposite side of the iloller, and realies such point at opened slightly wider and the opening movement eiected by cam 30, in order to admit the second blank. Cam surface 32 extends gradually inwardly similar to cam 31, and reaches its highest point at position No. 4 and pushes the sliding plate inwardl and closes the jaws on the two wound b anks.

)Cam 36 `extends in a more abrupt outward curve and reaches its highest poin-t at ejecting ition No. ,8 and acts on the innerside of t e roller and pulls pin 22 outwardly to itsfull limit and thereby permits the jaws .to -be opened to their widest extent. The

position No. 3 that the jaws will be.

effect of the several cams is therefore to iirst open the jaws slightly to receive the first blank, then to close the same on the first wound blank to act with sustained pressure on the blank, then to o en them more widely to receive the second b ank, then to close the same on the two wound blanks to act with MID 'matinee sustained pressure on the seams of the two wound blanks, and finally to open the jaws to the fullest extent to permit the ejection of the 4finished canton.

In order that when the clamping jaws are partially opened as at position No. 1 to receive blank A and atposition No. 3 to receive blank B, the sheet or blank will be properly guided around the mandrel in the winding operationeii'ected by the rollers G, each jaw has attached to it a number of transverselyextending blank guiding members, in the present instance in the form of spring bows 40. These bows are arranged at intervals in the length of the jaw, and while followin the concaved contour of the active face of t e jaw, they stand out or are spaced therefrom, `so that when the jaws are :partiall i opened as at position No. l, the

spring ws on the opposing jaws will bear with a gentle yielding pressure against the opposite sides of the mandrel, and the blank will 'be caused as it is fed by the rollers Gr in the winding operation, to pass between the spring bows and the surface of the mandrel and be thuscaused to adhere snugly to the mandrel and follow closely the contour of the same notwithstanding the partially opened condition ofthe jaws. When the jaws are closed on. the wound blank as the mandrel approaches position No. 2 `the sprin bows will yield as the jaws move inwar y towards each other, and the bows will become embedded in the soft rubber lining of the jaws as the latter is forced into intimate contact with the wound mandrel in holdin the seam closed.` The same action takes p ace a-t position No. 8, except that the spring bows in that positionjof the mandrel ress upon the' wound blank A onthe manrel and they act to guide the second blank snugly and closely around-the rst in the second winding operation.

In the present instance the bows are each formed from a spring metal stripwhich is fastened at its ends to the outer side of the jaw casing as at 41, and extends in opposite directions from lits points of attachment, to points beyond the o posite edges of the jaws, where-the strip is bent back on itself as at 42 and is curved as at 43 to follow the contour ot the jinner face of the jaw and in.

spaced relationto the curved surface of the rubber lining of the jaw. The curved portions 43 of the bows extend at an inclination across the face of the jaw, as best shown by dotted lines in Fig. 4, sotha-t the opposite ends of the loops are out of transverse alignment with each other, or in otherwords they break joint. The result is that the-ends ot the bows at the adjacent edges of the op osing jaws, will stand 'opposite to each ot er, while the other ends of the bows will stand oppositeI to each other, but will be disposed oppositethe spaces between the first men- Fig. 8, are so disposed that these active sur-y faces will be offset relatively toveac-h other to jointly engage the blank throughout its extent in the winding1 operation. Reenforcing springs 46 are attached tothe jaw casing and bear against the outer sides of the spring bows to reenforce their spring action.

In order, in the winding operation, to prevent the corners of the blank or sheet from` catching against the abrupt faces et the rubber lining of the jaws, each jaw is provided at its opposite ends with guides 47, see Figs. 4 and 5, which guides in the present instance are each in the form of :i metal strip attached to the rear face of the jaw and extending beyond the edge of the same where it is bent inwardly on itself so as toA present an inclined surface 47 a at the end of the rubber lining. These inclined surfaces will act, as the corners of the sheet approach the edges of the rubber linin l(to guide the same without obstruction etwe'en the mandrel andlining.

Due to tthe form and arrangement of the spring bows 40, the sheet or blank may be wound in either direction about the mandrel, the first blank windingin an anticlockwise direction, while the second blank is wound in a clockwise direction.

In fthe foregoing description and accompanyjing drawings I have set forth my vinvention in the particular detailed form and coijfttruction of the parts which I prefer to adopt. It will be manitesthowever that these details ma be variously changed d modified wit out departing from the spirit of the invention; and further itwill `be manifest that these details are Inot limited to receive separate blanks therearound insuccession to form superposed tubes, a seam pressing member associated with the mandrel andf-movable -with it, means for operating said member after the application of the rst blank to the mandre to press upon the seam of said blank, and means for againoperating said member after the application of the second blank to the mane. in a nachm@ if theiype described, the combination of means kfor forming two blanks into tubes one around the other with 'drel to press upon the seam of said second blank.

V 39 the seam of the first tube,

. thel seams disposedout of coincidence with each-other to produce a carton, and seam clampin jaws operable to press upon the Ithe two tubes in succession.

3. In a'machine of the type described, the

combination of a mandrel adapted to be supported in position to have a blank apv plied therearound to form a tube and movable to advance the tube to receive a second blank around the first to form a second tube superposed on the first, seam clamping jaws movable with the mandrel, means to hold v the jaws open in the first receiving position v l ber associated with themandrel and movablewith it, means for operating said member to press with a sustained pressure upon means for operating said member to relieve the pressure whenthe mandrel is at the second receiving position, means for operating the member 'to press with a sustained pressure upon the seam of' the second tube received by the mandrel at second position, and means for operating the member to disengage the tubes at ejecting position. v

5. In av-machine ofthe type described, the combination of a formin mandrel movable to diferent positions in t e machine, a seam pressing member associated with the mandrel and movable with it, and fixed cams in y position to operate said member at different periods .in the movement of the mandrel.

6. In a machine of the type described, the

combination of a series of forming mandrels "movable to diferent positions in themachine about a common axis, a seam ressin member associated w1th each man rel an movable with 1t, and fixed cams surroundf ing saidcommon axis in position to operate movab sald members yat Vdiiierent periods inthe movement of the mandrels.

7. In a machine of the type descibed,the

combination o f a forming mandrel, a cary mer for the same,

seam clamping jaws movably sustained bythe carrier in position to openand close on the mandrel, a jaw ac-j member movably sustained by and e with the carrier and operatively engaged with the jaws for opening and closing the same, and means for operating said actuating member.

8. In a machine of the type described, the

tuating the, jaws on the second` combination of a formingemandrel, a carrier and closing the same, and means for operating said actuating member.

9. In a machine of the type described, the

ycombination of a forming mandrel, a mov able carrier for the same,

seam clamping jaws movably sustained by the carrier to open and close on the mandrel, a jaw ac- I tuating member movable with the carrier and movable also relatively to the same to actuate the jaws, and fixed cams in the path of movement of the jaw actuating member to operate it.

10. In a machine of thetype described, the` combination of a forming mandrel, a carrier for the same, seam clamping jaws movably sustained by the carrier to open and close on the-mandrel, means for positively opening-the jaws and maintaining them 1n open position to permit the application of the blank to the mandrel to form a tube, and means for thereafter closing the jaws and maintaining them in closed position to ap l sustained pressure to the seam of the tulbe.

11. In a machine of the type described, the combination of a forming mandrel, a carrier for the same, seam clamping jaws pivoted to the .carrier in position to open and close on the mandrel, arms on the respective jaws, a jaw actuating member sustained by the carrier in position to engage said `arms and actuate the jaws, and means for operating the actuating member.

12. In -a machine of the type described, the combination of a forming mandrel, a carrier for the same, seam clampin jaws pivoted 'to the carrier to open am?` close on the mandrel, arms connected, with the jaws and provided with cam surfaces, a jaw actuating member sustained by carrier and provided with, a pin, said actuatin member. bein movable to engage the pin with 'thev di erentv cam surfaces, and means for operating the actuating member.

13. In a machine of the type described, the` combination of a forming mandrel adapted to have a blank woundftherearound to fo a tube, a resser member to act on the seam ofthe tu e, blankguiding means carried member and mandrel.

14. In a machine ofthe vtype described the combination of a forming mandrel J bythe presser adapted to bear on the forming 12e l and yielding ,Y

adapted to have a blank woundA there,

around `to form a tube,- a seam presser member normali disen aged from'the mandrel to permit t e bla to be applied, and

the combination of ya forming -lllll narines movable to press upon the seam of the tuba, and blank iding members yieldingly suntained by t e presser memberv and adapted when the latter is disengaged from the mandrel, to press upon thev same and guide the blank therearound 15. ln a machine of the type described, mandrel adapted to have a blank wound therearound to form a tube, clamping jaws nor mally disengaged from' thel mandrel to 'permit the blank to be applied and movable to press upon the seam of' the tube, and

4blank guiding means yieldingly sustained by the jaws and extending across the' face thereof in spaced` relation thereto, said guidingl members adapted toV bear gently on the mandrel when the jaws are disengaged therefrom...

16. In a machine of the type described, the combination of a .formin mandrel adapted to have a blank wound t erearound to form a tube, Vseam clamping jaws provided with a lining of yielding material, said jaws being movable into eng ement with the tube to press'on the seamt ereof, and yielding blank guiding strips sustained by the jaws and extending across the tace of the lining and spaced therefrom, said strips adapted to bear with a entle pressure on the mandrel to guide the lank;

17. In a machine ofthe type described,

` the combination of a forming mandrel adapted to have a blank wound therearound to closel and press upon the seam of the to form a tube, seam clamping jaws movable tube, and spring bows ysustained by the jaws ,and extending across the -face thereof in spaced relations to the "same, 'said bows adapted to bear upon the mandrel to guide the blank. U

18. ln a machine of the type described,

' the combination of a mandrel, blank windmg rollers rotatable at opposite sides' oi ythe combination of a formln `signature hereto.-

the same to wind the blank therearound to form a tube, and seam pressing members disposed in the spaces between the 'windin t v rollers and movable inwardly/'towards ea other to press uplon the seam of the tube.

. 19. ln a mac ine of the type described, the combination of `a mandrel, rotary blank winding rollers between which the mandrel is positioned to receive a blank, said rolls being operable to wind the blank around the mandrel to form a tube, said mandrel being movable from its receiving position to advance the tube, and seam ressin jaws opera le to movable .with the mandrel an press upon the seam of thetube in the spaces between the winding rollers. 4

described,

l20. ln a machine of the type mandrel movable from a first blank receiving position to a second blank receiving position d5 and finallyl to a carton ejecting position,

means for winding two blanks on the mandrel in succession to 'form superposed tubes to constitute a carton, seam pressin jaws associated with the mandrel an movable with it, means forl openin the jaws at the first blank receiving position ot the mandrel, so that the blank may be wound thereon to form a tube, means for closing the jaws on said tube to ress on the seam thereof, mean-s for opening said jaws wider than the first opening when the mandrel larrives at its second blank receiving position so that a second blank may be wound thereon to form a second tube superposed on the rst, means for closing the jaws on the lsuperposed tubes to press upon the seamyo the second tube, and means for widely opening said jaws when the mandrel arrives at the carton ejectingA position uto enable the carton to be ejected therefrom.

lnftestimony whereof,'l have amxed my JHTN D. WEBBER;

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