US2599708A - Inner lined folding carton - Google Patents

Description

June 10, 1952 GOTTESMAN 2,599,708

INNER LINED FOLDING CARTON Filed Nov. 14, 1949 Patented June 10, 1952 UNITED STATES PATENT OFFICE:

INNEBJ JNED FOLDlN'G CARTON Herman Gottesman, Clifton, .I., assignor t ThePermaline .(lompanylfiliftonl N. L, a-ccre Donation f. cw J rs y Ar'nlican nnnvmg er "14, 1949,;Seri'al No. 121, 13,; .z-ciaims. (cites-e14) The invention "here disclosed is-an inner lined folding carton of the type produced by-methods Especially it is an object of the invention to eiiect the attachment of the lining to the car-ton board, whether it be paper, cardboard, boxboard or the like, in a manner which will be 'complete- 1y firm and secure but which at the same-time will "permit thelining to strip orpeel away from the board to the extent necessary and only to that extent required for the proper in-folding, closing and sealing of the box endfiaps.

Attainment of these objects is effected bywhat has been termed pin pointlamination, involving the bonding of the lining to the board by: small, closely spaced points of-attachment, as distinguished from ordinary surfaceattachment effectedby-strip, spot and block methods of adhesion.

This fine, closely spaced, point lamination firmly secures the lining but leaves itlfree v to pull clear of the board in any direction from which strain is applied, without, however, favoring-lines of severance in any particular directions. Thus thelining will automatically letrgo in any.

direction that it should to enable proper infolding of the box, but only to: that extent and. in that direction required for such box-closing: operations.

Other important objects of theinventionare to provide a lined folding carton. construction adapted for general and for many special purposessuch as for air and liquid -tight, duste proof; oil-proof, sift-proof. and the, like boxes and which, with such extra. advantages: will be no more expensive, and :in "some-instances actually less expensive than products now in @use.v

Other desirableiobjects attained by the invention and furthernovel features through which the purposes of theinvention are attained, are

, set forth and will appearin the course of the following specification.

The drawing accompanying and forming part of the specification illustrates certain present commercial embodiments of theinvention. Actual physical structure, howeventmaybe modified and changed as regards such illustration, 3811' by presentap- 2 a within the true intent and I scope oi the invention as'hereinafte'r defined and claimed.

Fig. 1- in the drawing is a plan view of the laminated blank for a Window form of carton;

Fig. 2 is a broken perspective view illustrating how progressive delamination of the liner is automatically effected but only to the extent required f or the proper" infolding and closingofthe Fig. 3 is a generally similar view of another form of box construction designed particularly toavoid -wickage fromthe box contents;

Figs. 4 and 5 are broken perspective views of thefupper end portion of l a. lozenge holding type of box, showing the liner-free at the top to be.

closed and sealed'ofi" in: the manner of the-bag contained within the box;

Fig; 6 l is. an. enlarged broken sectional detail illustrating possibly in exaggerated,formitheffpin point lamination of the liner .to the boxboard.

The flatblank showninEig. 1 is for a Window type box and the lining I maytherefore. be/of cellophane or other suitable transparent; mate:-

rial so that contents of "the finishedzbox will, be visible through the: window opening 8. cut: in the;

boxboard 9.

This lining is shown as completely covering the-board exceptior the edge strip. lllleftion gluing the 'flapr II at the opposite edge (ii-the: blank to secure the blank in the. tubeqform,

The liner is attached to. the board-. by numerous small, closely spaced? .laminations l2; 'Theseh while not necessarily; of pinpoint? size, are'so small' as to individually: provide: only 3 light, easilyq separable attachment which will not tears main jure the linerinthe-operation-ofrpeelinggthe liner, from the board- Collectively, ,however, theseflnepoints of attachment firmly and securely hold v the liner to the board against any ordinary;

loosening eflects lthatimight be encountered either in the handling of, the, laminated blank or the.

setting-up and, closing of, the. box .oranm nor mal useeofthe finishedbox and {contents The spacing. of; the fine points, of laminationalso is a variable. Normally this spacingshould bedsuch as to. allow actual physicalseparation of' the: lining from. the; board between adjoining pointsof connection. This avoids weakeningor injuryof the liner against stretching forces and the like in attaching it to theboard andgives,

the lining a certain amountof freedom to separateafrom.theboard in. any direction in-which the peelingiorcemay, be applied. The liningtmay,

thus be separated from the board in anyldirece tionz'andzt'his; without settinguplany snecialhline of cleavage or separation, so that the peeling action will not establish any lines of weakness or cause the lining to continue separation once the separating force has been applied but then discontinued.

The fine points of attachment, closely spaced as they are, also cause the liner to pull away from the board so long as force is applied, but to stop pulling away from the board as soon as the peeling force is discontinued.

Thus, as shown in Fig. 2, when the box is set up and filled and the side flaps l3, M, are folded inward, those portions of the liner attached to the corners of the back and front flaps [5, I6, will peel to the extent but only to the extent of the downward folding movement of the side flaps, leaving intermediate portions still connected and thus keeping the lining in full'control at all times and assuring proper and complete final folding operations. These operations can all be performed on standard filling machines.

The point lamination is effected by heat sealing methods and therefore involves the use of some thermoplastic adhesive. This may be incorporated in or be applied to the surface of one or both the materials. Usually the thermoplastic medium is a part of the liner, for example, a heat sealing coating such as a plastic or wax on the outside face of the lining.

For some special purposes the lining may have a heat sealing coating of plastic on the outside for bonding to the board and a coating of wax on the inside for protection of the box contents.

Fig. 6 shows in possibly somewhat exaggerated form the manner in which the liner is bonded to the board by small, isolated points [2 which may be actually impressed to a greater or less extent in the surface of the board, depending on the pressure applied by the bonding elements, the texture of the board, the character of the thermoplastic bonding agent and other such factors.

As shown in the patent application above referred to, the bonding points may be carried by heated pressure roll or other form of platen-like member and may be in the form of small, regularly machined projections or other regular or irregular, closely spaced, small projections, preferably blunt or rounded and having rounded as distinct from sharp edges so as not to cut, tear or injure the lining.

In the present illustration the bonds have been effected by minute, diamond shaped, blunt points, providing a somewhat ornamental diamond pattern attractive to the eye as well as providing attachment enabling the liner to be readily peeled away from the board in any direction and remain attached to the board just where left by discontinuance of the peeling force. It will be appreciated that these multitudinous, tiny bonds or liminations may be square, circular, triangular or various other regular or irregular shape.

The spacing between bonds may be greater or less or substantially equal to the points of attachment, depending on actual conditions and requirements.

The fineness of the laminating points and the actual physical spacing of the same permits the use of adequate sealing heat without scorching or injuring the liner or coatings applied thereto or the board, and the use of such heat and accompanying pressure enables practically instantaneous bonding so that the lamination can be effected at high speed, with consequent high production.

The small size and the spacing of the bonds provides quick cooling and practically instan taneous setting of the bonds, promoting high speed production. 7

The pin poin lamination may be used for all or only certain portions of the board and liner and may be combined and used with other forms of lamination such as continuous or spot lamination.

Thus in Fig. 1 the side edge portions of the liner are secured to the flap forming portions of the board by pin point" lamination and the intermediate or body portion is secured by solid or continuous lamination.

The invention is applicable to many different kinds of containers.

Thus in Fig. 3 it is shown applied to a box for containing ball bearings or other machine elements. These are usually covered with a preservative grease or oil and it is highly desirable to keep this greasy material from seeping through or showing on the outside of the box. The liner 1 in such case may be wax paper. The pin point lamination at [2 permits this to pull away from the front and back flaps ll, l8, as the end or side flaps I9, 20, are folded inward.

To prevent possible wickage through the edge of the front fiap, the intermediate portion of this edge is cut away as shown at 2| so that it will not reach the liner on the opposite wall of the box and so that the projectingedge portion 22 of the liner back of the cutaway 2| will act as a guard to prevent any grease reaching the edge of the flap.

Figs. 4 and 5 illustrate the invention applied to a type of box for holding cough lozenges, candy or the like and in which it may be desirable to have the liner free at the top in the nature of a bagwhich can be sealed before the box is closed and then be exposed when the box is opened for removal of the contents from the mouth of the bag structure.

The front of this lozenge type box is broken away in Fig. 4 to show how in such a case the pin point lamination [2 may be carried up only to near the top of the box, leaving the upper portion of the liner above that free from the box walls at 23, to be brought together after filling and sealed in an automatic filling machine in bag mouth formation after the manner indicated in Fig. 5, preparatory to folding inward and closing the end flaps.

Leaving the upper bag mouth portion of the liner free as described, also provides space back of the front wall of the box for tucking in the closure flap 24 of the box top 25. The pin point" lamination permits the bag forming, upper portion of the liner to be readily pulled away from the sides of the box, as found most convenient to get at the contents of the box.

In addition to the foregoing, the invention makes it possible to use bare board in place of the specially prepared board heretofore required for inner lined cartons. Aluminum and other metal foil linings with suitable heat sealing coatings may be used. In the case of wax coated linings the small points of contact, the spacing and the freedom of the liner between these points and the rapidity with which this pin point lamination may be effected, all contribute to prevent melting of the wax such as would interrupt continuity of the wax coated surface.

The invention contemplates further the combining of the pin point lamination with other forms of lamination. Thus, in a construction like that shown in Figs. 4 and 5, the liner at the bottom portion of the box may be secured by solid or continuous lamination, and above that the pin point lamination, and finally at the top, no lamination, leaving the bag mouth entirely free but easily detached in the pin point laminated part, and below that, solidly attached to the box wall so that it cannot ordinarily be entirely pulled out of the box board.

What is claimed is:

1. An inner lined folding carton comprising a box board having end folding flaps, a lining applied to said board and covering said end fiaps, and multitudinous, separated but closely spaced thermoplastic bonds connecting said covering portions of the lining with said flaps, said bonds being impressed into the surface of the board with the portions of the lining between the impressed bonds free and unattached whereby adjoining bonds are isolated and may be individually released but collectively will firmly secure the lining to the board and whereby when the carton is set up for filling the lining will be held fiat against the face of the flaps but in the closing of the carton will be partially pulled away by the infolding movement of the flaps but only to the extent occasioned by such movement of the flaps.

2. An inner lined folding carton comprising a box board having end folding flaps, a lining applied to said board and covering said end flaps, and multitudinous, separated but closely spaced thermoplastic bonds connecting said covering portions of the lining with said flaps, said bonds being impressed into the surface of the board with the portions of the lining between the impressed bonds free and unattached whereby adjoining bonds are isolated and may be individually released but collectively will firmly secure the lining to the board and whereby when the carton is set up for filling the lining will be held flat against the face of the flaps but in the closing of the carton will be partially pulled away by the infolding movement of the flaps but only to the extent occasioned by such movement of the flaps, said bonds being arranged in a regular diamond shaped pattern, enabling the lining to readily peel away from the board in any direction.

HERMAN GOTTESMAN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 837,324 Mitchell Dec. 4, 1906 1,505,999 Gereke Aug. 26, 1924 1,517,964 Drysdale Dec. 2, 1924 1,597,677 Everett Aug. 31, 1926 1,956,159 Reilly et a1 Apr, 24, 1934 2,099,257 Bergstein Nov. 16, 1937 2,493,337 Buttery Jan. 3, 1950

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