US2317223A - End flap construction for cardboard containers - Google Patents
End flap construction for cardboard containers Download PDFInfo
- Publication number
- US2317223A US2317223A US385598A US38559841A US2317223A US 2317223 A US2317223 A US 2317223A US 385598 A US385598 A US 385598A US 38559841 A US38559841 A US 38559841A US 2317223 A US2317223 A US 2317223A
- Authority
- US
- United States
- Prior art keywords
- flaps
- end flaps
- fold
- end flap
- cardboard containers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/06—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end-closing or contents-supporting elements formed by folding inwardly a wall extending from, and continuously around, an end of the tubular body
- B65D5/061—Rectangular containers having a body with gusset-flaps folded inwardly beneath the closure flaps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S229/00—Envelopes, wrappers, and paperboard boxes
- Y10S229/90—Envelopes, wrappers, and paperboard boxes including means to facilitate handling by a mechanical apparatus during manufacturing or filling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S229/00—Envelopes, wrappers, and paperboard boxes
- Y10S229/92—Stress relief
Definitions
- This invention relates to the structure of cardboard boxes and more particularly to an improved end closure therefor. It is a division of my application Serial No. 300,294, filed October 20, 1939, for Cardboard containers.
- Cardboard containers have decided advantages over wooden or metal boxes as shipping containers since they are collapsible, and occupy less space when unfilled, are much lighter in weight, and cost much less. Diificulty has been encountered, however, in providing cardboard containers with end closures which are sufficiently strong and durable for the many diiferent kinds of objects, particularly heavy objects such as small motors and the like which are of such a size that they can be boxed. In cardboard boxes heretofore provided there is a tendency for the structure to tear along an extension of the line of division between adjoining end. flaps.
- I provide an end structure, preferably without division between adjoining end flaps, and having reentrant portions in the outer edges in an opposed pair of end flaps terminating in circular cut outs at the point of intersection of the Wedge-shaped cut outs formed by said reentrant edge portions and lines of fold converging outwardly from the inner corners of said end flaps.
- Figure 1 is a perspective view of my cardboard box showing one set of the end flaps, in open position;
- Figure 2 is a plan view of the box blank
- Figure 3 is a detail view showing how the overlapping ends may be stapled together.
- the box I comprises the body panels b divided by lines of fold [0a, and the end flaps ll, l2, l3 and I4. End flaps l2 and I4 are adapted to overlap as will be more fully explained. End flaps II' and I3 are divided by lines of fold 1" into side triangular portions x and z, and intermediate portion 11 The outer edge of intermediate portion 111' has a reentrant portion which may terminate below the outer edge of the adjoining end flap forming the wedge-shaped cut cuts or gores 0, extending from the outer corners of panel, converging inwardly and terminating in the circular cut outs 0, which are located at the points of intersection between said wedge-shaped cut outs or gores c, and the lines of fold f respectively.
- the box When the box is filled it may be closed at the end by folding the flaps I! and i3 along the lines of fold f and inserting the flap l4, which may be tapered inwardly toward its outer edge, into the pocket formed by the flap l2 and the adjoining triangular portion 2' of flaps II and IS.
- the portions 2' fold inwardly along lines of fold f and thus provide a closure around the end of the inserted end flap l4 and prevent its displacement sidewise.
- the overlapping ends of flaps l2 and M may then be stapled together as illustrated in Fig. 3 thus providing a very strong and durable end closure.
- the under arm of the stapling machine can be readily slid over portion t of either end flap II or l3, under the overlapped and interengaged flaps l2 and M, for stapling, which would obviously not be possible if the lines of fold f extended all the Way to the top edge of end flaps II and 12, as they would were it not for the wedge-shaped cut outs or gores c.
- My end structure has the advantages that; when the box end is closed a pair of end flaps are overlapped and interengaged along their side edges, and may be readily stapled together forming a tight closure; and tearing of the end flaps is reduced to a minimum.
- a box having an end closure comprising four sides and four end flaps, each integrally connected to its adjoining end flaps along fold lines, defining a portion of the lateral edges respectively, two of said end flaps forming an opposed pair being long enough to overlap, and each being without line of fold within its body, the other two of said end flaps each being of substantially the same length as the overlapping flaps but cut away along its upper lateral edges leaving the outer lateral edges of said first mentioned pair of end flaps free, said other end flaps also each having lines of fold extending upwardly and inwardly at an angle from their lower corners and terminating respectively in circular cut-outs, the said cut away portions at the upper lateral edges of said other flaps respectively being tapered downwardly and inwardly and also terminating in said circular cut-v outs respectively, one of said overlapping end flaps together with the adjoining folded over portions forming a pocket for the reception of the end of the other overlapping end flap.
Description
END FLAP CONSTRUCTION FOR CARDBOARD CONTAINERS Original Filed 001;. 20, 1939 INVENTOR Q'soeqs Pa 7'7MA/V.
Biz-44 1 I14 f .ATTORNEY Patented Apr. 20, 1943 END FLAP CONSTRUCTION FOR CARD- BOARD CONTAINERS George Rottman, Brooklyn, N. Y.
Original application October 20, 1939, Serial No. 300,294. Divided and this application March 28, 1941, Serial No. 385,598
1 Claim This invention relates to the structure of cardboard boxes and more particularly to an improved end closure therefor. It is a division of my application Serial No. 300,294, filed October 20, 1939, for Cardboard containers.
Cardboard containers have decided advantages over wooden or metal boxes as shipping containers since they are collapsible, and occupy less space when unfilled, are much lighter in weight, and cost much less. Diificulty has been encountered, however, in providing cardboard containers with end closures which are sufficiently strong and durable for the many diiferent kinds of objects, particularly heavy objects such as small motors and the like which are of such a size that they can be boxed. In cardboard boxes heretofore provided there is a tendency for the structure to tear along an extension of the line of division between adjoining end. flaps.
It is the object of this invention to provide an improved end closure for cardboard containers which will be highly resistant to tearing, and easy to seal.
In carrying out my invention I provide an end structure, preferably without division between adjoining end flaps, and having reentrant portions in the outer edges in an opposed pair of end flaps terminating in circular cut outs at the point of intersection of the Wedge-shaped cut outs formed by said reentrant edge portions and lines of fold converging outwardly from the inner corners of said end flaps.
The invention will best be understood if the following description is read in connection with the accompanying drawing, in which like characters refer to like parts and in which,
Figure 1 is a perspective view of my cardboard box showing one set of the end flaps, in open position;
Figure 2 is a plan view of the box blank; and
Figure 3 is a detail view showing how the overlapping ends may be stapled together.
The box I comprises the body panels b divided by lines of fold [0a, and the end flaps ll, l2, l3 and I4. End flaps l2 and I4 are adapted to overlap as will be more fully explained. End flaps II' and I3 are divided by lines of fold 1" into side triangular portions x and z, and intermediate portion 11 The outer edge of intermediate portion 111' has a reentrant portion which may terminate below the outer edge of the adjoining end flap forming the wedge-shaped cut cuts or gores 0, extending from the outer corners of panel, converging inwardly and terminating in the circular cut outs 0, which are located at the points of intersection between said wedge-shaped cut outs or gores c, and the lines of fold f respectively.
The said intermediate portion of end flaps l I and I3 is suggestive of an hourglass in form.
It will be seen that the part of the intermediate portion 11 located below the circular cut outs o is joined to the triangular portions x and a, while the part t above the circular cut outs, is not so attached.
When the box is filled it may be closed at the end by folding the flaps I! and i3 along the lines of fold f and inserting the flap l4, which may be tapered inwardly toward its outer edge, into the pocket formed by the flap l2 and the adjoining triangular portion 2' of flaps II and IS. The portions 2' fold inwardly along lines of fold f and thus provide a closure around the end of the inserted end flap l4 and prevent its displacement sidewise. The overlapping ends of flaps l2 and M may then be stapled together as illustrated in Fig. 3 thus providing a very strong and durable end closure.
The structure described above by which the lower portions of panels II and I3 are joined to panels l2 and [4, while the upper portion t of panels II' and I3 is unattached, facilitates the stapling together of the overlapping ends of end flaps l2 and I4. In the operation of stapling machines now most commonly used a portion or arm of the machine must be placed under the overlapped end flaps, while another projecting portion or arm extends over the overlapped end flaps. The under arm of the stapling machine can be readily slid over portion t of either end flap II or l3, under the overlapped and interengaged flaps l2 and M, for stapling, which would obviously not be possible if the lines of fold f extended all the Way to the top edge of end flaps II and 12, as they would were it not for the wedge-shaped cut outs or gores c.
I have found that the circular edge provided by the circular cut outs o is extremely resistant to tearing. Tearing of cardboard boxes often begins at the end of a line of division between end flaps. By eliminating lines of division between the end flaps and causing the gores c to terminate in the circular cut outs o I provide a box end which is substantially free from tearmg.
My end structure has the advantages that; when the box end is closed a pair of end flaps are overlapped and interengaged along their side edges, and may be readily stapled together forming a tight closure; and tearing of the end flaps is reduced to a minimum.
What I claim is:
A box having an end closure comprising four sides and four end flaps, each integrally connected to its adjoining end flaps along fold lines, defining a portion of the lateral edges respectively, two of said end flaps forming an opposed pair being long enough to overlap, and each being without line of fold within its body, the other two of said end flaps each being of substantially the same length as the overlapping flaps but cut away along its upper lateral edges leaving the outer lateral edges of said first mentioned pair of end flaps free, said other end flaps also each having lines of fold extending upwardly and inwardly at an angle from their lower corners and terminating respectively in circular cut-outs, the said cut away portions at the upper lateral edges of said other flaps respectively being tapered downwardly and inwardly and also terminating in said circular cut-v outs respectively, one of said overlapping end flaps together with the adjoining folded over portions forming a pocket for the reception of the end of the other overlapping end flap.
GEORGE ROTTMAN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US385598A US2317223A (en) | 1939-10-20 | 1941-03-28 | End flap construction for cardboard containers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US30029439A | 1939-10-20 | 1939-10-20 | |
US385598A US2317223A (en) | 1939-10-20 | 1941-03-28 | End flap construction for cardboard containers |
Publications (1)
Publication Number | Publication Date |
---|---|
US2317223A true US2317223A (en) | 1943-04-20 |
Family
ID=26971697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US385598A Expired - Lifetime US2317223A (en) | 1939-10-20 | 1941-03-28 | End flap construction for cardboard containers |
Country Status (1)
Country | Link |
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US (1) | US2317223A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2618110A (en) * | 1949-04-30 | 1952-11-18 | Florida Fibre Box Company | Art of packaging |
US2799442A (en) * | 1953-11-18 | 1957-07-16 | Robert Gair Co Inc | Box with automatic closure |
US2823795A (en) * | 1955-03-07 | 1958-02-18 | Moore George Arlington | Composite container |
US3329331A (en) * | 1964-01-09 | 1967-07-04 | Morgan Adhesives Co | Resealable containers and flexible laminate therefor |
DE1293077B (en) * | 1962-06-01 | 1969-04-17 | Dixon Rowland Leeds | Liquid-tight folding box closure |
US6024279A (en) * | 1997-10-30 | 2000-02-15 | Georgia-Pacific Corp. | Bulk container formed from blank having T-shaped slots separating closure flaps |
US20050284076A1 (en) * | 1996-06-11 | 2005-12-29 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
-
1941
- 1941-03-28 US US385598A patent/US2317223A/en not_active Expired - Lifetime
Cited By (75)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2618110A (en) * | 1949-04-30 | 1952-11-18 | Florida Fibre Box Company | Art of packaging |
US2799442A (en) * | 1953-11-18 | 1957-07-16 | Robert Gair Co Inc | Box with automatic closure |
US2823795A (en) * | 1955-03-07 | 1958-02-18 | Moore George Arlington | Composite container |
DE1293077B (en) * | 1962-06-01 | 1969-04-17 | Dixon Rowland Leeds | Liquid-tight folding box closure |
US3329331A (en) * | 1964-01-09 | 1967-07-04 | Morgan Adhesives Co | Resealable containers and flexible laminate therefor |
US20050284076A1 (en) * | 1996-06-11 | 2005-12-29 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060032177A1 (en) * | 1996-06-11 | 2006-02-16 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060201095A1 (en) * | 1996-06-11 | 2006-09-14 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060225370A1 (en) * | 1996-06-11 | 2006-10-12 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060225377A1 (en) * | 1996-06-11 | 2006-10-12 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060236634A1 (en) * | 1996-06-11 | 2006-10-26 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060236638A1 (en) * | 1996-06-11 | 2006-10-26 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060236636A1 (en) * | 1996-06-11 | 2006-10-26 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
US20060236631A1 (en) * | 1996-06-11 | 2006-10-26 | Moriau Stefan S G | Floor Panels with edge connectors |
US20060236637A1 (en) * | 1996-06-11 | 2006-10-26 | Unilin Beheer B.V., Besloten Vennootschap | Floor panels with edge connectors |
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