Carton

July 4, 1950

2,513,902

Filed Nov. 30,

1948

W. J. TYRSECK

CARTON

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Patented July 4, 1950

2313,902

UNITED STATES PATENT OFFICE

2,513,982

CARTON

Walter J. Tyrseck, Montville, Conn., assignor to Robertson Paper Box Co., Inc., Montville, Conn., a corporation of Connecticut

Application November

Claims.

This invention relates to improvements in cartons.

More particularly, the invention is concerned with providing a shock-proof or cushioned receptacle for packaging bottles or like articles, and which may be made of pasteboard or like inexpensive material on existing automatic machinery.

For a full understanding of the invention, a detailed description of the container will now be given in connection with the accompanying drawing and the features forming the invention will then be specifically pointed out in the appended claims.

In the drawing:

Figure 1 is a flat view of the container blank; Figure 2 is a view showing the completed container in collapsed condition;

Figure 3 is a front elevation of the container with part of one wall broken away to show the internal structure.

Figure 4 is a section on the line 4—4 of Figure 3; and

Figure 5 is a plan view on an enlarged scale of the container with the top flaps open.

The blank comprises four generally rectangular panels I, 3, 5 and 7, adapted to form an outer box, an intermediate panel 9 and inner box panels ί I, 13, 15 and 17. These various panels are disposed in an aligned series and are separated from each other by score lines 2, 4, 6, 8, 18, 12, 14 and 16. An end flap 19 separated from the panel 17 by score line 18 is also provided. Score lines 10 and 18 may be partially cut through as at 20, to facilitate a sharper fold, and the score lines 12, 14 and 16 are interrupted by generally U-shaped cuts c defining oppositely facing pro| jections or tabs 21 and 23. The blank includes also top flap elements 25, 27, 29 and 31, bendable along the transverse score line 24, 26, 28, 30 and bottom flap elements 33, 35, 37, 39 and 41 bendable on the score lines 34, 36, 38,40 and 42. Score lines 2 to 20 inclusive are referred to as longitudinal score lines for the reason that the blank in folding as hereinafter described will pass through the folding machinery in parallelism to these score lines.

For convenience of reference, the surfaces which are uppermost in the blank as shown in Figure 1 will be referred to as the faces of the panels, while the opposite surfaces will be referred to as the reverses thereof.

The container is designed for manufacture on a continuous roll-around principle and in the manner about to be described.

30,1948, Serial No. 62,609 (CL 229—14)

The first fold occurs on the line 16, flap 19 and panel 17 being folded over onto panels 15 and 13 and in face to face relation thereto. The reverse of terminal panel or flap 19 will have 5 previously been prepared with adhesive over the area indicated at A. The next fold occurs at line 12, bringing the reverse of panels i7 and 19 over panels ΊI and 9. Flap 19 is thus joined to panel 11 by adhesive. The next fold occurs 10 on line 8, bringing the reverse of panels 15 and over the faces of panels 7 and 5. The last fold occurs on the line 4, bringing the faces of panels I and 3 over the folded structure and hence over the reverse of panels i I and 9. The reverse 15 of panel 9 will previously have been prepared with adhesive over the area indicated at B and will thus join panel 9 and panel ( together. While the last fold occurs from left to right, as it is more convenient to handle two panels to 20 the left of line 4 in automatic folding machinery than to fold over the entire assembly to the right of this line, it will be. observed that the actual folds imparted to the material are the same as though this last fold on the line 4 had been 25 made by folding the entire assembly to the right thereof over, so that the collapsed box produced is folded continuously in one direction.

The container thus produced is shown in collapsed condition in Figure 2, in which the various 30 panels are identified by reference numerals with the suffix F where the face of the panel is shown, and with the suffix R where the reverse is shown. The folding operation along score line 14 will have separated the projections 23 and 21 along 35 the U-shaped cuts defining the same, projections protruding from the edge of panel 13 and projections 23 protruding from the edge of panel 15.

Panels II, 13, 15 and 17 will be somewhat narrower than the panels 3, 5, 7 and I, to which 40 they are juxtaposed in a completed box. The width of panel 13, including the projections 21 and 23 thereof, will equal the width of panel 5 apart from the usual allowance for folding. Similarly, the width of panel 15, counting in the pro45 jections 21 and 23 thereon, will equal the width of panel 7, while panel 17, counting the projections 23 thereon, will equal the width of panel 9. Again, apart from the folding allowance, panel 8 will be less in width than panel i by the width 50 of a projection 23.

Pressure on the edges of the collapsed container of Figure 2 will open it into rectangular form in the usual way, so that when the bottom tabs have been folded and tucked in it presents the appear55 ance of Figures 3, 4 and 5. As will be observed a,sis,9oa from those figures, panels if, 13, 15 and 17 form an inner box spaced from the outer box, formed by the panels I, 3, 5 and 7 and connecting panels thereon, by a distance equal to the width of the projections 21, 23. Moreover, this spacing is maintained by the projections. If now a bottle is inserted in the. package, as indicated in phantom in Figure 4, it will.be held by the inner box or sleeve, made up of panels II, 13, 15 and IT, in spaced relation to the outer wall of the box. This construction, in which an inner sleeve or container spaced from the outer container and in which the spacing is maintained by the projections 21 and 23, furnishes protection equivalent to that usually afforded by a separate insert of corrugated board, and eliminates the assembly operations and expense, since the entire container, including the inner sleeve, is formed from a single blank by high speed and economical automatic machinery. The top flaps 25, 27, 29, 31 will be folded over and tucked in in the usual way to close the package.

While the spacing projections 21, 23 are most conveniently formed by means of the cutout C and are most advantageously placed at the fold lines between panels, projections formed by bendable portions of the inner box panels in other ways may be utilized where desired, without departing from the invention in its broader aspects. It will also be noted that in certain cases the terminal panel I can be narrowed considerably, since this panel and panel 9 form a double thickness wall across the major part of the width of the box. Where such double thickness wall is unnecessary, panel I can be narrowed down so as to become little more than a glueing flap capable of bridging the space between panel 11 and panel 3 and overlapping panel 9 sufficiently to provide for an adhesive joint.

Provision for protecting the top or bottom of an article within the container against shock may also be made and such provision is provided at the bottom of the box in the embodiment illustrated. Since the cap of the bottle, when inserted in the box of Figure 4, is at the top it may readily be made shock-resistant. Such provision is ordinarily unnecessary at the top but may be provided where desired. The bottom is rendered shock-proof by placing the lower edges of the panels to the right of fold line 8 and the transverse fold line 42 at a somewhat higher level than the fold line 40 and the bottoms of panels I, 3, 5 and 7. Because of this formation of the blank, the completed container as shown in Figure 4, has an inner diagonal false bottom formed from the flap 41, upon which the bottle sits, thus spacing it from the bottom of the container and protecting it against shock. This result can be achieved broadly by the elevation of the fold line 42 by comparison with the fold line 40 and transverse fold lines to the left thereof, without correspondingly elevating the bottom edges of the adjacent panels, but the construction is more conveniently and economically constructed in the form in which shown.