US 2682909 A
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Description (OCR text may contain errors)
July 6, 1954 c. E. CLAFF ET AL v MACHINE FOR MAKING REINFORCED WEBS Original Filed June 6, 1947 Z'gllllllllfl'lllllllll llllllllll UIIIII .lllllllllllllllll) Patented July 6, 1954 Chester E. Claif and Carl A. Moeller, Randolph, Mass assignors, by mesne. assignments, to M; B. Claff. & Sons, Inc., Randolph, Mass.,.a corporation of'Massachusetts Original: application June 6, 19.45, Serial. No. 752,980; now Patent No.. 2,646,914, dated July Divided and this application April 25, 1 950, SeriaLNo. 158,156-
v 7 Claims. 1 The present invention relatestothe manufacture of ,boxes or cartons from pasteboard or the like,and,more particularly to machin'es for pro.-
ducing reinforced webs from which blanks may bemade for such. boxes .or. cartons.
Some types of 'boxes or cartons, such, for. ex.- ample, asboxesv in which shoesare customarily packed. and; stored onv the shelves of the. retail dealer, are. subjected, in. use to excessive strain atthe corners due. to the common practice of shoe salesmen of. drawing the box outwardly from. the store. shelf, and, often from beneath other boxes stacked above, by inserting one or more fingers downwardly, within. the box or upwardly within the cover, and pulling against the front. wall of the box or cover. This puts a heavystrain .onthefront top corners of the box or. the bottom front corners of. the. cover, with the resultthat the boxes and. covers are frequentlytornat one or both front corners.
It. is the objectofthe present invention to provide a machine for producing webs ofpasteboard or the like having. a reinforcing cord or string secured along one or both edges thereof, from which webs reinforced blanks maybe formed whichare suitable for use in making'boxes and box covers having string reinforcement at their top and bottomcorners, respectively.
With this object in view, the present invention consists in a machine for applying and securing a-;reinforcing-string or cord to the edges of the web of cardboard or thelike-to form a reinforced web from which individual box blanks may be produced.
Preferably-the opposite edges of the web of box material .are cut or split inwardly a short distance to form a cleft or seat tov receive the cord to-which adhesive has been applied, and a cover paper is adhesively secured to the opposite marginal. surfaces of. the web, passing tightly 4 around the cordjseatedin the cleft. If desired, however, the splitting. of the edge of the web mayrbe omitted and the adhesively coated cord applied directly to the unsplit edge with cover paper-passing; aroundthe cord and secured to the: opposite marginsof'the. web.
In the accompanying drawings, whichillustratemore or less diagrammatically the present invention, Fig. 1 is atop =plan-view and Fig. 2 is a side elevation of the machine for-slitting the edges -of "theweb of -'box blank material and laying the reinforcing cord in the slit thus formed; and applying-the web-of cover paper'to one face; of 4 the-cardboard; web; and-for folding the=sameover and aroundthe cord-andonto the opposite face of the cardboard to providea composite web of cardboard, reinforcing cord and cover paper preparatory to the forming of individual' blanks therefrom; Fig. 30 is avertical, transverse, section on line 3-3 of Fig. 2, showing a portion of a slitting knife for slitting the edge of the pasteboard web as it advances between the top and bottom plates or supports; Fig. 4. is a vertical, transverse, sectional view taken online 47-4 of Fig. 2, showing a portion of the cord-guiding roll laying the cord in the cleft in the margin of the pasteboard web; Fig. 5; is a vertical transverse, sectional view on line 5-5 of Fig. 2, showing a side margin of the pasteboard web. with the cord positioned in the cleft. andthe cover paper applied to the. lower face of the cardboard web and extendingmarginally therefrom, preparatory to being folded around the edge of the pasteboard and cord and onto the top face of the cardboard; Fig. 6 is a transverse sectional view of the cardboard web, reinforcing string and cover. paper in final assembled position; Fig. 7 is a sectional View of a modification of the invention in which the adhesively coated cord is applied directly to the edge of the unsplit pasteboard web, and Fig. 8 shows in section the cover paper on the lower face of such web and wrapped around the cord and secured to the top marginal face; Fig. 9 is a perspective of the-finished blank suitable for a box cover, and Fig. 10 isasimilar view of a cover shown upside down formed from the blank of Fig. 9; Fig. 11 is a perspective view, partly in section and on an enlarged scale, of a corner of the box cover, still upside down, with the side and bottom cut away to show the internal construction.
In the machine of Figs. land 2, the web of cardboard I5 i supplied from a roll I1, from which it is drawn by the power driven feed rolls ES; From the feed rolls the web passes through the edge guides 2!, which guide and align the webpreparatory to the edge slitting operation which-is performed by the circular slittingknives 23 on the vertical rotating shafts 25.-
In order to present the web properly to the edge slitting knives, stationary guides are provided in the form of a lower support 26 andia top plate 2lbetween which the web passes. The inner adjacent faces 28 of these guides arebeveled at their outer edges as shown in Fig. 3, to accommodate the beveled edges 29' of the slitting knives, and permit the latter to spread open the slit to provide a groove or seat for the cord;
Thecords 30- are fed from a supply cop or roll 3| pastthe adhesive-applying roll 33, where they are coated with glue or other suitable adhesive supplied from the tank 35 and transfer roll 31. The cord-applying roll 38 has a grooved periphery 39 to receive the cord from the roll 33, and guides and presses the cord into the cleft or slit 4| in the edge of the web [5, the latter at such time passing between the top guide 43 and bottom support 45.
The web l5 with glue-coated cord 30 embedded in the slits on each edge thereof next passes to the rolls 4'! where the cover paper 49 from the roll 5| is applied to the bottom face of the cardboard web !5. The top face of the cover paper on its way from the supply 5| is coated by the pasting roll 51 with paste received from the transfer roll 5% and paste reservoir 6|. The Web 49 of cover paper is wider than the web l5 of pasteboard, so that when the cover paper is applied to the bottom face of the web of pasteboard, there is a projecting margin 63 of cover paper on each side of the pasteboard web, as shown in Figs. 1 and 5.
The combined pasteboard and cover paper webs then pass to the plows 65, shaped to turn over the projecting margins 63 of the cover paper around the edge of the cardboard and reinforc ing cord and onto the top marginal surface of the cardboard, as shown in Fig. 6.
From the plows the composit web passes between the pressure and feed rolls 6'! which press the parts forcibly together, at the same time advancing the web to the conventional creasing, slitting, and severing mechanisms for producing blanks of conventional form such as shown in Fig. 9.
This blank comprises the main or body por-- tion 69, side wings II, and end wings 13 with the end wing extensions 15. Longitudinal creases or fold lines 11 are positioned between the side wings H and the body 69, and transverse fold lines 19 separate the end wings 13 from the body 69 and extend onto the s de wings to separate the side wing extensions or corner tabs 8| from the side wings. Supplementary transverse creases 83 lie between the end wings I3 and extensions 15.
The reinforcing cord 30 is shown in dotted outline at the outer edges of the side Wings H, with the cover paper 63 wrapped around the edges of the cord, and extending inwardly on the face of the side wings. Slots or notches 85 are provided at the ends of the blank, which separate the. corner tabs 8! from the end wings 13 and extensions 15.
The blank shown in Fig. 9 is a box cover blank from which the box cover shown in Fig. 10 will be formed or set up, with the side wings 1| turned up onto the sides and the corner tabs 81 turned inwardly to form a portion of the end construction. The end wings 13 are turned up and secured by glue or adhesive to the inturned corner tabs GI, and the end wing extensions 15 turned inwardly and downwardly and secured by adhesive to the inner faces of the corner tabs and the end wings.
As shown in enlarged detail in Fig. 11, the reinforcing cord lies along the top edges of the side wings and corner tabs being firmly secured in the cleft or slit by adhesive and the cover paper 63.
When the box is drawn forward by the shoe salesman by his fingers inserted behind the front end of the cover, the strain on the corners of the cover will be taken largely by the reinforcing cord, and tearing or breaking of the cover and box board at such times will be prevented.
While the present invention has been shown and described as embodied in a machine for producing a reinforced web particularly designed and intended for use in making box blanks for pasteboard shoe boxes and the like with a cover paper which also serves as a binder to bind or secure the reinforcing cord to the edge of the web, it is not to be limited thereto but may be embodied in machines for making reinforced webs from web material other than pasteboard, and securing or binding materials other than cover paper, such reinforced web being intended for other uses than the manufacture of boxes or cartons.
Nor is the invention to be limited to the specific forms and arrangment of parts herein shown and described, but may be embodied in other forms and arrangements within the scope of the language of the appended claims.
Where in th foregoing description reference is made to a box or boxes, this is to be understood as including box covers.
This application is a division of our pending application filed June 6, 1947, Serial No. 752,980, now Patent No. 2,646,914.
Having thus described the invention, what is claimed is:
1. A machine for making a reinforced web having, in combination, means for supplying web material, a rotary knife for slitting the edge of the web inwardly, flaring means engaging the edge margins of the web to support the web adjacent the slitting knife and permit a, limited depth of the slit, devices for supplying a reinforcing cord, and a guide roll having a grooved cord-receiving face for guiding and pressing the cord into the slit in the edge of the web.
2. A machine for making a reinforced web having, in combination, means for supplying web material, a rotary slitting knife for slitting the edge of the Web inwardly, an edge guide for guiding the web past the slitting knife, devices for supplying a reinforcing cord, a guide roll having a grooved, cord-receiving face for uiding and pressing the cord into the slit in the edge of the web, and an edge guide for guiding the web adjacent the guide roll, said edge guide comprising a pair of web engaging members spaced from one another to receive the web therebetween, the inner faces of said members being outwardly beveled to permit a limited separation of the margins of the web adjacent the slit during the cord applying operation to position the cord at the edge of the web.
3. A machine for making a reinforced web having, in combination, means for supplying web material, a pair of rotary slitting knives with wedge-shaped peripheries for slitting opposite edges of the web inwardly and spreading apart the edge portions of the web adjacent the slit, edge guides for supporting the edges of the web, said guides being provided with outwardly flaring web-engaging faces for supporting and positioning the edges of the web as it passes the slitting knives to permit a limited spreading apart of the said edge portions, devices for supplying reinforcing cords, and a pair of guide rolls each having a grooved cord-receivin face for guiding and pressing the cords into the slits in the edges of the web and positioning the cords at the edges of the web.
4. A machine for making a reinforced web having, in combination, guiding means for the web, means for advancing web material through the web guiding means, slitting means positioned adjacent the Web guiding means for slitting the directing the cord into the slit in the edge of the,
web, the web guiding means in the region of cord introduction having spaced wall portions engaging and supporting the edge margins of the web, the wall spacing at the margin of the web cor,- responding substantially to the total thickness of the web and cord and the wall spacing inwardly of the margin corresponding substantially to the web thickness, whereby the cord is positioned at the edge of the web.
5. A machine for making a reinforced web having, in combination, means for supplying web material, web guiding means having spaced surfaces between which the web is advanced, means for advancing the web through the web guiding means, slitting means positioned adjacent the web guiding means for slitting the edge of the web inwardly, means for supplying a reinforcing cord, and cord guiding means for directing the cord into the slit in the edge of the web, the web guiding means in the vicinity of the cord guiding means having flared surfaces adjacent the edge margins of the web to support the slit portions and limit the opening thereof substantially to the thickness of the cord and thereby to position the cord at the edge of the web.
6. A machine for making a reinforced web having, in combination, means for supplying web material, guiding means having spaced surfaces between which the web is advanced, means for advancing the web through the web guiding means, slitting means positioned adjacent the guiding means for slitting the edge of the web inwardly, means for supplying a reinforcing cord, means for applying adhesive to the cord, and grooved cord guiding means for directing the adhesively coated cord into the slit in the web edge, the web guiding means in the vicinity of the grooved cord guide having spaced guide surfaces to engage and support the split edges of the web, the spacing of said guide surfaces at the web edge corresponding substantially to the total thick- 6 ness of web and cord, said guide surfaces inwardly adjacent the web edge having a spacing corresponding substantially to the web thickness,
, thereby to limit the slit opening at the web edge substantially to the cord thickness for positioning the cord at said edge.
7. A machine for making a reinforced web having, in combination, means for supplying web material, guiding means having spaced surfaces between which the web is advanced, means for advancing the web through the web guiding means, slitting means positioned adjacent the guiding means for slitting the edge of the web inwardly, means for supplying a reinforcing cord, means for applying adhesive to the cord, grooved cord guiding means for directing the adhesively coated cord into the slit in the web edge, the web guiding means in the vicinity of the grooved cord guide having spaced guide surfaces to engage and support the split edges of the web, the spacing of said guide surfaces at the web edge corresponding substantially to the total thickness of web and cord, said guide surfaces inwardly adjacent the web edge having a spacing corresponding substantially to the web thickness, thereby to limit the slit opening at the web edge substantially to the cord thickness for positioning the cord at said edge, means for supplying adhesively coated paper, and means for applying said paper to one face of the web, around the slit edge in contact with the cord in the slit, and onto the other face of the web.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Re. 19,847 Springer Feb. 4, 1936 1,591,062 Smith July 6, 1926 1,597,257 White Aug. 24, 1926 1,636,525 Meeker July 19, 1927 2,184,970 Allen Dec. 26, 1939 2,285,447 Lichter June 9, 1942 2,304,534 Burns Dec. 8, 1942