Sept. 17, 1946.- f H. J. sTorrlER ' ‘ 2,407,802 ' LINED CARTON Filed -May l, 1941 2 SheetséSheet 1 r INVINTOR HERBLÉRT JZ SATOTTER BY 617W?? ATT'ORN EYS gepî. i?, 1946. H. J. S'ETGTTEFE 2,407,392 LINED CARTON Filed May 1, 1941' 2 Sheets-Sheet 2 ' l INVEN‘ITOR HERßE/zr .I .STQTTER BY WWW* ATTORNEYS ` 2,407,802 Patented Sept. 17, 1946 UNITED STATES PATENT OFFICE ' 2,407,802 LINED CARTON Herbert J. Stotter, Shaker Heights, Ohio Application May 1, 1941, Serial No. 391,318 1 Claim. (Cl. 229-14) 1 2 This invention relates to an improvement in lined cartons and a method of making them, and, more particularly, to a method of making and lining a standard four side carton upon standard carton machinery with a liner of’heat-sealable material and a lined carton made by this method, the liner in the` carton being so arranged and constructed that its open mouth may be easily ers with a reversely turned lin diflicult to use in flattened to be securely sealed. automatic or semi-automatic sealers, particularly in the case of four-sided cartons where the iin is located at .the corner of the carton and thus >re quires a flat seal at the mouth of the liner to extend diagonally of the erected carton. All of the foregoing objections are overcome by this in vention which' provides a liner with a substan tially butt-welded longitudinal seam detectible , The well-known standard paper board or card board cartons, in which substantially all mass 10 only by the presence of a fine longitudinal bead production merchandise is sold, are the so-called “four sided” cartons which are comprised. of a which is so small that it does not interfere with the sealing of the mouth of the liner. In a lined four-sided carton made according to this inven tion, longitudinal fins on the liners are eliminat front panel, a rear panel, side panels, glue lap, `and end flaps formed from an integral blank 15 ed and the mouth of the liner may be sealed along a line parallel to the front and back panels of the characterized by fouriparallel longitudinal score carton in an automatic or semi-automatic heat lines which define the front, rear, and side panels sealer. and the glue lap. Although ingenious scores and Another object of this invention is to provide a cuts in the carton blank may vary the ultimate appearance of the carton, the overwhelming ma 20 lined carton in which the inner liner, though formed from a flat liner sheet attached to a flat jority of all cartons are basically four-sided. This carton blank and, consequently, formed simul is both the cause and result of the automatic taneously with the formation of the flat blank, carton machines used in substantially all of the may be pulled out of the completed carton as a numerous carton plants being substantially standardized. The ultimate objective in manu 25 separable bag element. Heretofore, in lined car tons in which the liner constituted a separable facturing lined cartons„therefore, has been to bag element, the liner was a preformed bag invent a method which would permit a lined around which the carton was formed or a pre carton to be made ina standard carton machine formed bag inserted into the completed carton. Without altering the uconstruction o_f the machine ' or its sequence of operations, but by simply add 30 My invention eliminates the heretofore neces ing a simple element and interposing the opera sary, bag preforming operation. tion of the added element so that it would not interfere with the standard operations. This in Other‘objects and advantages of this inven tion will be apparent from the following specifi ` cation, claim and drawings, in which: f vention achieves that objective. Fig. 1 is a plan view of a flat four-sided carton I-Ieretofore, any lined cartons which have been 35 susceptible of manufacture on any sort of auto blank with a, liner sheet attached.V Fig. 2 is a `plan view of the carton blank shown matic machinery, standard or otherwise, have in Fig. 1 after the first folding operation and il ,not been entirely satisfactory because of the lo lustrating the formation of the longitudinal side cation and arrangement of the longitudinal seam , ` which forms the liner sheet into a tube. The 40 seams `in the liner. form of the longitudinal seam in the liner pre sented a particularly diiiicult obstacle to over come when it was attempted to heat-seal the ` open mouth of a ñlled carton. The two types of longitudinal liner seam used heretofore were 45 either av lap seam or a face-to-face seam Von a Fig. 3 is an elevation of a completed collapsed flat tubular lined four-sided carton formed from the blank shown in Fig. l but with bottom flaps turned up to show the bottom mouth of the liner sealed. l not be heat-sealed and the extra thickness of Fig. 4 is a top view of a four-sided carton erect ed from the collapsed condition shown in Fig. 3 and illustrating the manner of flattening `the the liner at the lap Vmade heat-sealing of the mouth of the liner. reversely turned fin. -The lap Seam itself- Vcould ` In the drawings, which disclose one form of a mouth of thef liner diflicult. The face-to-face 50 four-sided carton embodying my invention, I0 `seam on a reversely turned iin could be heat represents the blank' of cardboard, ,pasteboard sealed, but, to`seal` the mouth ofrthis type of corrugated paperboard, or like paper stock from liner, the reversely turned ñn lmust be unfolded which the o_uter shell of the lined carton is made. to obtain a seal Without reentrant folds or extra thicknesses of material. `"I‘hisrenders `suchlin In the carton blank, `visible edges and cutsA are 2,407,802' 3 4 shown in heavy solid lines, invisible (i. e., Viewed margins 52 and 54 during the fabrication of the through the liner) cuts and edges are shown as light single dash lines, visible score lines are carton in standard carton machinery. The liner sheet 56 is composed of heat-scalable sheet stock, shown as heavy double dash lines, and invisible which is also water-proof or moisture-proof, and score lines are shown as light double dash lines. Ul may also be oil-proof, depending upon the needs Between the parallel longitudinal edges I I and and characteristics of the product being pack I2 of the blank Iíl are the four parallel longi~ aged. Examples of sheet stock meeting ‘the re tudinal score lines I3, I4, I5, and I6. The spaced quirements of the liner sheet 56 are rubber hy top fold line Il and,y bottom V,fold line I6, which may bevv completely scored or partly cutand drohalide ñlm, such as the rubberhydrochloride film known commercially as “Plioñlnn” polyvinyl )resin film, such as the polyvinylchloride and/or scored, as the end flap construction requires,"are parallel to each other and extend at right angles to the longitudinal score lines. The top and botè" polyvinyl acetate film known commercially -as “Koroseal” or “Vinylite,” cellulose acetate, or any tom lines> and the longitudinal edges andscore ' - ' 'otherthermoplastic film which will sealV or weld lines deñne the glue lap 2|, front panel 22, `,left , yunder heat and pressure. The liner sheet 5B may side panel 23, back panel 24 and right side panel" al's‘oconsi'st of ' a paper backing sheet provided 25, as shown in Fig. 1, the front-,and back panels .i .withganinner (with respect to the complete car being of equal width but the glue lap being nar-. *I ton) surface laminated or’coated with thermo rower than the side panels, which are‘of equal plastic‘heat-sealing material, such as a natural or width. , e The ‘bottom closure' in. thecarto'n i made Vfrom 20 synthetic thermoplastic heat-sealing resin and/or the! blank Iûfshownfin Fig-»1 -is designed-»to be a` plasticizer.v :In any event,.the1ining sheet 50 should vbe thin enough so that,` two thicknesses provided With'a sealed endY closure. iThefblank may be> cut through iby’a knife against the blank In, therefore, isp'rovided withrtheïcustomaryseal; ing ñaps 3l, 32,933, andv34 integral Wi-thrthe glue lapl and panelsZ-I; -22‘, '23, and 24,' respectively, along lthe bottom fold line ‘ISS « The top closure of the cartonmadefrom the blank-I û'is designed tobe V’provided with'atuck-in closure. The blank I Il; therefore, is rprovided with "the customaryside ñaps V4| and d3> and tuck-in flap dâïintegral‘with ' the glue lap 2|, side’pane1`l23, and rear' panel-2li, respectively, v‘along the top- f old line- «I l. f’ The" end closures described above ’»are"~-merely described'by vHJ or against a cooperating vmetal anvil as the carton Ablank passes through a gluer in a standard carton machine set-up. ‘ ` f . f D i 4To fabricate my carton in standard carton ma chinery, the blank I0 is first cutout of suitable board sheet stock in any suitable die-cutter. The dieecut flat blankl 0 is then run through a stand ard window pasting machine which spots the sev Veral'l areas of adhesive 6|,.62, 63,64, 66, 61, and'68 upon the blank I0 and substantially simultane ously cuts> o'ff the liner sheet .5B from a rollfof liner> stock and Vappliesthe liner sheet 50 to the blank I6, >to form the combinedblank yand line way 'of example, >the''particularl style‘ofïendèclo- ' sure or‘'arrangement-> and location of the end `flap being more yfor llessI immaterial to this invention. It is preferred, however, that the panel inside `the vside scoreli'ne (i. e., toward' the- center of the `sheet as' shown in Fig. 11.' `- creas'ed‘orpressed scer'esgand, further,r that these .theliner margin 54’ in substantially face-to-face ~ ' f Theïcombined blank Iû and liner sheet 5G is then'passed through a standard gluer which first blankiwith respect to the side score line,lthe line 40 applies the longitudinal band of adhesive 65 to lörbeing 'the'side score line fin' this disclosureybe the side panelnZt'v-by` means of a glue wheeler provided with both-'top and bottom flaps,> and vsiinilar'standard adhesive applying means. rThe that the' outside edges -ofv these naps> beëcontinu combined blank andV liner is then folded along ations V`of' the side s'core'flinex >It isjalso preferred the‘central score line I4 kso thatfthe glue lap »2| overlies-the backpanel` 24 vand at least a portion of the„longitudinal«liner-margin :52 will overlie kjacent'‘t"he_'sidejscoreline be cut'scores rather than topand bottom iiaps` 'extend' to' or slightlyfbey'on’d will extend beyondv the topfand*bottom‘foldfiines Contact“, the 'margin 52 lbeing Wide enough so that the’longitudinal edge V'5I `of the liner 5B will ex' tend Voutside and beyond the side Vscore line 'I5 whenthe combined carton blankr and Vliner are so ’asui‘?cient distance'toÍpermit the top edge and Vfoldedyas shown in Fig. 2 of the drawings. the >top fandV bottom'jed'ge's‘of "the lliner sheet; " ’ « 'rhe nner sheet 5e- is‘ofjsucii-e Ilength theti't _, the *bottom edge Y“to be ‘sealed lwhen ‘ the ycarton ` Y fUp- to- this'point, the operation and procedure is formed anderected: The width o‘f ‘the'liner' have been the standard'and conventional ones in ysheetdâíli's -suelfrt'hat,when placed upon'the blank Y the manufacture'of standard four-sided cartons, I0, one longitudinal margin willextendi‘beyond except insofar asl'the liner sheet 50 is located somewhat’diiïerently from `andjis larger (in pro. and outside the side ’score line andthel other` lon. gitudinall margin v«will extend outside “and over portion to the size of the blank Ill) Vthan' the Winhang the l‘ongitudinal'edg'e of the blanko'pposite dowof transparent film normally applied in _a ly disposed with respect to they side score line'. 60 standardvwindow machine'. ‘ It is also novel prac Thusfin the blank "shownVv in VVFig. y-1, one longi tise» to ‘provideïthe preferred spots of temporary tudinal' edge -5l-*of thetliner sheetY 56 overhangs ~adhesive e6, "G'Ijand 68.' Even 'thesegexceptions the longitudinal edge Il yof theblank îII) to pro tolsta'ndard practiseY do ‘not require^alterations vide 'a maI'gîHSZand' the other longitudinal edge 53 of the blank 50 extends beyond and outsidefthe 'side-score'li'ne I6 >to -provide another longitudinal margin 54.-' «'_I‘hev liner-¿sheet 56 isïadhered tothe Y lblank-f'IIl-byïmea'ns of suitable areas of 'adhesive 6I, 62, 63, and 64 applied tothe-glue' iapand inthe’window ymachine or changes in procedure "but merelyjrequire Aa slightly different settingjof the sheet jcuttingand vspotting elements of the machine; -' At» this point, however, is interposed the additional step inthe otherwise substantially standard procedure and -an Aadditional element panelslZI, '22,» 23,r and §24, respectively; ' Additional IPO must-be «added `to a" standard-ì‘gluer. With the spots ory lines ottemperary> adhesive 66,* 61,' and >folded*l carton blank passing vthrough the kgluer -68 «may ‘ be.: applied ft'ofthei endflaps- 44, '4I ,"“and- »34, respectively,` to" temporarily-adhere' -the ¿top `c‘o'r in thefdirection indicated> by theldirectional‘ar lrow'in Fig. 2, :it passes underasealing andeut .nersv l and the `«bottom»corners of theY liner r-sheet off element 'I0 which trims oii` the margins 52’a'nd iii!A to .the severalïñaps ¿adjacent Y the longitudinal 75 ~54 and heat-seals' the liner sheet" 5i) ytogether 2,407,805? ' along a longitudinal seam 'H to form the liner sheet 50 into a tube. It is also this point at which the preferred spots of temporary adhesive 66 and 61 serve their function.` Because the feeding tapes run continuously in a standard gluer, thus score,- line, _or in `the Vevent that the stock in' the blank is too soft to permit the element 'l u to heat sealand cut-oil` „the lmer 5u directly against the blank'„;lthelelement lu may be provided with va thin-metal anvil which will'slipbetween the over lyingliner and the blankto permit the element moving the blanks uninterruptedly through the _'lü .to out and heat-seal the liner against the hard , machine, heat-sealing `and cut-oí element ‘lll is surface of the anvil rather than against the soft held stationary by fastening it to a suitable fixed surface ofthe blank. l _ ‘ , member in the machine,` the folded blank being It should also be pointed out that the seam ‘H dragged under, i. e., through, the heat-sealing 10 is very narrow, being ‘preferably about as wide andV cut-off element by the feeding tapes. If the as the thickness of one`ply of the liner sheet. heat-sealing and cut-off element 'lü is simply a Thus, the seam 'it is „substantially a butt joint stationary heated knife, as shown in Fig. 2, the rather than awide iacefto-i‘ace joint.` Because liner sheet‘margins 52`and 54, being free and loose from the blank l0, would ruck up as the forward edge of the liner sheet 50 was engaged the inner surfacesof the liner are actually welded by the heat-sealing and cut-off element l0. This tendency of the loose liner margins to ruck may be minimized by having the, element lû comprised of'a heated wheel provided with a sharp knife> 20 as ,the liner material and just as strong as the Wide lap or face-to-Íaoe seams, believed to `be necessary heretofore, could be. In the drawings, edge,v or a heated narrow-rimmed wheel which ñrst engages and heat-seals the overlying plies of the liner sheet and a knife immediately following the heated narrow-rimmed wheel, which outs together at the seam li, the seam is as strong the Width of theseam ‘H is exaggerated for pur-_ poses of illustration. Actually, the seam 'll may !_be_ `scarcely perceptible, being noticeable only as a slight bead on‘the outer surface of the tubed liner sheet. through the heat-seal and trims off the margins 25 ...After the longitudinal seam 'il is formed,‘the ` remainder ofthe operations in forming` -the lined 52, and 5D, or by mounting the element 10 so that carton are standard , operations performed in it is normally raised but is lowered into engage standard carton machinery. After the longi ment with the blank by a suitable timer, such as tudinal seam ‘H is formed, the next operation in an electric eye timer, for example, just as the forward edge of; the liner5l] passes under the ele 30 the gluer` is that of folding over the side Ipanel 25 along the side score line I6 and adhering the ment 1t. Regardless of which one of the suitable panel 25 to the :glue lap’2l by means of the bland heat-sealing _and cut-off elements may be em of adhesive t5. This operation, in the formation ployed, the tendency of the forward edge of the of standard unlined four-,sided cartons, normal liner sheet 55 to ruck up is prevented by provid ing the spots of adhesive‘ßß and 61 which adhere 35 ly follows immediatelyA after` the operation of folding the blank along the central score line. the forward edge of the liner'sheet 5o adjacent After the blank has .passed through the gluer, the margins 52 and 54 to the relatively stiffer it is in the form of a flat collapsed lined tube. In naps of the blank lil. Thus, as the heat-sealing most instances it may be regarded as being com cut-orf element engages the `forward edge of the liner sheet 5I), the liner sheet Will >be held and 40 plete for sale to the user. However, some users may want the flatV collapsed cartons delivered prevented from rucking and wrinkling. If the with the bottom of the liner tube sealed. In such heat-seal and cut-off is started correctly, there is no especial tendency for the‘plies of the liner instances, the flat collapsed tubular carton is then taken from the gluer and passed through a sheet 50 to ruck up thereafter, particularly if the bottom ply is secured to the blank ll) adjacent 45 right-angle gluer. In a right angle gluer the car ton is fed throughY the machine in the direction the seam ll, as by the area of adhesive 64, for example. indicated by the directional arrow in Fig. 3. The right-angle gluer first folds back the bottom flaps `It should be particularly noted that tHe seam 3| and. 32, as shown in Fig. 3, exposing the bot-` 1| is formed on or just inside the side score line I6. Thus, no reversely turned fin will be formed 50 tom of the tubular liner 56 which rests upon the bottom ñaps 33 and 34. The bottom seal 'l2 is when the carton is completed and erected, and then formed by passing the carton under any yet the seam in the liner will be substantially supported by the corner which is formed in erect suitable heat-sealing device, such as a heated nar ing the carton and folding the blank along the longitudinal side score4 line lr6. When it is stated hereinafter that the `longitudinal seam in the liner is formed “at” the side score line, it is to be row-'rimmed wheel, for example, substituted for the usual glue wheel in a right-angle gluer. ` No out-oif device is necessary in this sealing opera tion. In the particular carton shown, the seal 'l2 is formed by the heat-sealing device press understood that the seam is located on or just ing the plies of the liner together against the un inside the side score line. By providing the panel inside the side score 60 folded bottom ?laps. If the bottom flaps do not line with flaps having outside edges which are form a substantially continuous surface under extensions of the side score line, it is usually pos the seal, the heat-sealer for the seam 'l2 should sible to cut through the superimposed plies of be equipped with an anvil plate to support the. liner during the bottom sealing operation. In the liner sheet against the blank throughout the length of the longitudinal seam in the liner the embodiment shown in Fig. 3, the spot of tem porary adhesive 68 serves to anchor the forward sheet. Also, by cut-scoring the portions of the laterally extending score lines which the longi edge of the under ply of the liner 50 to the flap 34 to prevent rucking. tudinal liner seam crosses, there are no creased It will be noted that the bottom sealing seam score lines which the element ll! must ride over in forming the seam 1l. Such creased score 70 ` 'l2 extends from the central score line to the side lines could cause the element lll to jump and fail score line, which ‘become diagonally opposite cor ners when the ñat collapsed carton is erected. to form the seam 'll at the lateral score lines. Because the seam 12 will thus extend substantal However, in the event that the carton blank is not provided with top and bottom naps having ly diagonally across the bottom of the carton outside edges which are extensions of the side 75 when erected, the seal 12 must be spaced Vbelow ’ 2,467,802 ‘7 S the bottom fold lines of- the carton .a sufficient ~ Ar packagel maderfrom my cartonis sift-proof, :moisture-proof, and even oil-proof, if ztheliner .itself is oil-proof, because allseams in the liner sheet arevthoroughly heat-sealed. It will be Anoted in Fig. 4 >that the longitudinal seam .1I and the .lateral> top heat-seal will have .to cross. distance to-prevent the liner from pulling away from the carton walls when thecarton is erected. Thisdistance will vary according to the relative width vof `the erected Aeartonto its thickness. Thus, with the width of the carton as a and the thickness as b, thedistance a: from the bottom fold line I8. to the seal l'12,.as shown in Fig. vv3, . should be equal to , , , .. . .Y l ë Because the seam "H is so fine, however, itwill , notl preventV a securentop heat-seal fromlbeing obtained. It doesl not- act asan extra thickness of material> as did the seamsin vthe lapped‘or face-to-.face vlongitudinal seams employedY here A tofore. . . . Y .„ Y . To fold the». particular carton shown,l the user From the foregoing, it is apparentthat by~ my erects the lflat collapsed carton and the bottom method a lined four-sided carton may be made ñaps' are sealed or pasted together in the usual in standard four-sided carton machinery without 4 manner to‘form a sealed bottom. `The top flaps substantially alteringthelmachinery itself or the will then be pulled down in the usual manner, as sequence of normaloperations. . It is also appar shown in Fig. 4,-to allow the'liner mouth to'be ent that a‘carton »with a’ longitudinally. seamed ilattened ,along the'line 73 parallel to the front ' linenmadeaccording tomy invention, may be andlback panels for sealing, in anyy suitable heat 20 more readilyhandled in automatic carton filling sealer. Because the spots of temporary adhesive and. sealing machinery since. my carton liner 88 and 5l, which adhered the forward edge of the eliminatesthe objectionable. lap or face-to-face liner to the Viiaps during fabrication, yare very reversely turned iin seams employed heretofore. weak and designed for temporary adhesion only, My invention, therefore, `though intended pri . the mouth of theliner is separated from the flaps> V25 marilyfor standard >four-sided cartons, may be without resistance. -After the mouth of the `liner issealed and folded down, the flaps may -berclosed in the usual manner. 1 . . » applied to improve.other special types ofcartons, such as the vso-called “six-sided” cartons, or the Y like, > whichV must. be manufactured on special YFor clarity of illustration, the areas »of adhesive 6l, 62, $3, and 64 are shown in Fig. l as the some what conventional heavy rectangular areas of adhesive' which adhere the liner sheet to the machinery. 30 , ,. .Y - , _ _ , , '_ MyV invention, therefore, is Vnot -limited tothe particular embodiment disclosed, either in whole or in part, but is limited only tothe scopevof the margins >of the panels ofthe blank.` If these following claim. 4In the claim, the meaning im areas are as'heavy as shown in Fig. l, the liner parted to theterrnsis to: be Vconsistent with'th'e Y 50 will, »for all intents «and purposes, be perma 35 use of thesame terms .iin this specification. nently secured in the outer carton, since it would be practically necessary to tear the outer carton In a cartonof the class described, a ñat tubu apart to remove the liner 50. However, just as lar four-sided cartonA blank folded along two ' the smally spots or linesof adhesive 56, 61, and 68 parallel longitudinal zscore lines, a vheat-scalable will temporarilyadhere the liner 50 to the blank 40 linerV> sheet adhered to the inner surface 4of `said I0 during the formation of the lined carton but tubular carton. blank, and a longitudinal .seam permit the liner to be readily separated from the in said liner, said seam being comprised of heat# flaps after the carton is formed, so maythe areas sealed edges of said liner sheet and located at a of adhesive El, 62, B3, and 64 comprise light lines fold in said blank, said blankr having a` second Whatis claimed-is:- . Y ’ ~ ., - ,. p . or spots of adhesive ywhich serve as somewhat » pairof longitudinal score lines parallel to said temporary areas of adhesive to adhere. the liner sheet `50 to the blank lil during the formation of the carton. Thus, after the carton is formed, the linerßt is not interlocked with the bottom two scorelines and top and bottom fold lines transverse to said score lines, said score lines and said fold lines defining a front panel, a back panel,l and two sideY panels, vand a» transverse flap or between the glue lap and side panel and, 50 heat-sealed seamextending across said liner’par consequently, may be simply pulled out of the allel to said bottom fold> line, said transverse cartones a readily separable bag element. When heat-sealed seam> being spaced from said bottom the carton is packed with greasy or pasty mate fold line at least a distance equal tothe square rials, it is particularly convenient to be able to root `of one-half the product of the widths of the separate the liner readily to squeeze out or other 55 front panel and the side panel. wise remove the greasy or pasty contents. Y HERBERT J. STOTTER.