US3899120A - Paperboard blank with crushed offset flap edges and method for forming same - Google Patents

Paperboard blank with crushed offset flap edges and method for forming same Download PDF

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Publication number
US3899120A
US3899120A US475790A US47579074A US3899120A US 3899120 A US3899120 A US 3899120A US 475790 A US475790 A US 475790A US 47579074 A US47579074 A US 47579074A US 3899120 A US3899120 A US 3899120A
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US
United States
Prior art keywords
flaps
blank
paperboard
lines
offset
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
Application number
US475790A
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English (en)
Inventor
Eli H Fradkin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Georgia Pacific Corrugated LLC
Original Assignee
Owens Illinois Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Owens Illinois Inc filed Critical Owens Illinois Inc
Priority to US475790A priority Critical patent/US3899120A/en
Priority to CA223,975A priority patent/CA1018128A/en
Priority to FR7516177A priority patent/FR2272905B1/fr
Priority to DE19752523663 priority patent/DE2523663B2/de
Application granted granted Critical
Publication of US3899120A publication Critical patent/US3899120A/en
Assigned to OI FOREST PRODUCTS STS INC. reassignment OI FOREST PRODUCTS STS INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: OWENS-ILLINOIS, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • 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
    • Y10S229/93—Fold detail
    • 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
    • Y10S229/939—Container made of corrugated paper or corrugated paperboard

Definitions

  • ABSTRACT An improved paperboard blank having offset slits and an adjacent crushed area.
  • a paperboard blank is formed with flaps attached to main panels along fold lines. The flaps are separated from one another by slit lines which are offset from the foldable connections of the main panels.
  • a crush line which is approximately twice as wide as the amount of offset of the offset slits, extends substantially c'oextensively with the slit lines. The crush line defines an area which is substantially thinner than the originalthickness of the paperboard 56] References Cited material.
  • fold lines adjacent to those flaps which are folded first may be made deeper than other UNITED STATES PATENTS fold lines to aid in easy'erection of the blank into a B l l 8 2 carton.
  • the method for forming the blank is also dis- I'U CI' 6 3 1 3,050,229 8/1962 Neff 229/D1G. 4 C osed 3,432,375 3/1969 Rein 93/582 R X 10 Claims, 4 Drawing Figures l 20 22 24 f e Li a 341 s tb /34e I ,34 1 as 38 4o 2s as 30 a 2g 42 f 44 46 1 PAPERBOARD BLANK WITH CRUSHED OFFSET FLA]?
  • This invention generally relates to paperboard blanks foldable into tubular cartons. More specifically, this invention relates to such blanks having offset slits to separate attached flaps from one another. Most particularly, this invention relates to such blanks having a crush line which is substantially coextensive with each offset slit.
  • My invention is an improvement in a paperboard blank which may be folded into a tubular configuration.
  • flaps are attached to at least one main panel along fold lines.
  • the flaps are separated from one another by offset slit lines which extend from the fold line connecting the flaps to the main panel to the outer marginal edge of the flaps.
  • My improvement is a crush line, substantially coextensive with each of BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a plan view of a paperboard blank illustrating the present invention
  • FIG. 2 is an end view of the circled area designated as A in FIG. 1 on a much enlarged scale;
  • FIG. 3 is a fragmentary cross-sectional view of a cutting rule and crushing structure to produce the blank 7 of FIG. 1;
  • FIG. 4 is a plan view of a paperboard blank for a tray illustrating the present invention.
  • FIG. 1 shows a paperboard blank 10 illustrating the present invention.
  • the blank 10 includes two pairs of opposed sidewall panels 12 and 14 and 16 and 18 respectively connected to one another along fold lines 20, 22 and 24, which may be formed by scoring or other suitable means.
  • Bottom closure flaps 26, 28, 30 and 32 are integrally and foldably connected to the sidewall panels 12, l4, l6 and 18 along a fold line 34a, 34b, 34c and 34d.
  • the flaps 26, 28, 30 and 32 are separated from one another by offset slit lines 36, 38 and 40. Offset slit lines such as those shown at 36, 38 and 40 are known in the art of paperboard box construction.
  • slits are designated as offset slits because they do not align with the foldable connections 20, 22 and 24 which connect together the main sidewall panels.
  • the degree of offset is typically on the order of onesixteenth to one-fourth of an inch.
  • All of the slit lines extend from the fold line 34 to the outer marginal edges of the flaps 26, 28, 30 and 32. Again, this is conventional practice.
  • the difficulty with using a blank 10 which utilizes slit lines rather than slots to separate the flaps from one another is that when the blank 10 is folded into a tubular configuration, as is its intended purpose, the flaps 26, 28, 30 and 32 tend to interfere with one another and do not readily fold inwardly into their assigned positions.
  • the crush lines 42, 44 and 46 define an area of the paperboard blank that is substantially thinner and is preferably between 20 and 50% thinner than the original thickness of the paperboard blank.
  • the width of the crushed area is preferably at least twice the amount of offset of its associated offset slit.
  • all of the crush lines 42, 44 and 46 are on the side of the offset slit 36, 38 or 40 which is toward the foldable connection 20, 22 and 24 from which the slit lines are offset.
  • This particular configuration or positioning of the crush lines is dictated by the folding sequence of the blank in the automatic equipment on which it is run. Some folding sequences could require the crush lineto' be placed on the opposite side of the slit lines 36, 38 and 40 from that shown in FIG. 1.
  • the fold lines 34a and 34b may be made with a 0.850 inch scoring rule while all the other fold lines may be made with a 0.830 inch scoring rule.
  • the dimension given, as is the conventional practice, is the height of the rule itself and not the depth of the score. However, the relationship between rule height and score depth or fold line depth is reasonably linear. Therefore, the fold lines 34a and 34b are about 0.020 inch deeper than the remainder of the fold lines on the blank 10. By making selected fold lines deeper than others, the flaps connected by the deeper fold lines bend more easily in the carton erection sequence.
  • the fold lines associated with the flaps that are first folded in a carton erection sequence should be substantially deeper than the remainder of the fold lines in the blank.
  • the deeper fold lines should be from to 35% deeper than the other fold lines.
  • FIG. 2 illustrates, on a very much enlarged scale, an end view of the section circled in FIG. 1 and designated as A.
  • FIG. 2 is used to illustrate the degree of crushing exhibited along the crush line 42.
  • the paperboard blank 10 is manufactured of a corrugated paperboard material which has two outer paper layers of liner board 48 and 50 and an inner corrugated layer of corrugating medium board 52. Note that the crush line 42 is considerably depressed below the original level of the paperboard blank 10 as illustrated by the outer or upper layer 48. In the use of this invention with corrugated paperboard, it is very difficult to specify a definite depth for the crush line, such as 42.
  • Paperboard blanks in commerce today are most commonly formed on either cylindrical type cutters or flat plate type cutters.
  • the slots are cut, and additional score lines are placed at right angles to the score lines which were placed on the blank as it was fed from the corrugating machine.
  • sponge rubber having a Shore durometer hardness in the range of from 15 to 24, is normally used around both the scoring rules and the cutting rules to force the blank off of these devices when the blank is being formed. If the sponge rubber were not used, the blank would tend to stick to the cutting rule and would not eject itself from the machine properly. It is understood that there is some small degree of crushing present as a result of the sponge rubber, but this degree of crush is minor and is unacceptable in large amounts because of serious appearance problems. In FIG.
  • a portion of the die 54 for a flat press type blank die forming machine is shown. Attached to the die 54 is a cutting rule 56 having on one side thereof a piece of cork material 58 having a Shore durometer hardness in the range of 42 to 50. Note that the cork material 58 extends above the cutting rule 56.
  • the cutting rule 56 may be used to cut any one of the slit lines 36, 38 and 40.
  • the purpose of the cork 58 is to produce the crush line 42, 44 or 46.
  • the cork 58 should be of a width equivalent to the crush line that is to be produced. Note that cork is given as a specific example of a material to be used because it has a certain degree of resiliency and thus will strip the blank from the cutting rule 56.
  • FIG. 3 illustrates a method and apparatus for carrying out the present invention usable on a flat plate type machine, the application and modification necessary to utilize this particular technique on a rotary type blank forming machine should be obvious to those skilled in the art.
  • FIG. 4 illustrates a paperboard blank 60 for a tray which also incorporates the present invention.
  • this type of blank 60 has only one main panel 62 which actually forms the bottom of the completed tray.
  • Sidewall flaps 64 and 66 are separated from the main panel 62 by respective fold lines 68 and 70.
  • End wall flaps 72 and 74 are separated from the main panel 62 by respective fold lines 76 and 78.
  • Offset slit lines 84 and 86 separate the flaps and 81 from the sidewall panel 64.
  • Fold lines and 87 separate the lines 88 and 90 separate the flaps 82 and 83 from the sidewall panel 66.
  • Fold lines 89 and 91 separate the flaps 82 and 83 from the flaps 72 and 74.
  • areas designated as 92, 93, 94 and 95 are crushed adjacent to the offset slit lines 84, 86, 88 and 90.
  • the crushed areas 92-95 all have a width about twice the amount of the offset of their associated offset slit line from its adjacent fold line. The amount of crushing is from to 50% of the original thickness of the paperboard.
  • the fold lines 76, 78, 85, 87, 89 and 91 are all made with a 0.850 inch scoring rule and the fold lines 68 and 70 are made with a 0.830 inch scoring rule. These dimensions have previously been fully explained with respect to FIG. 1.
  • the purpose of this deeper score of from l5 to 35% of selected fold lines is again to aid in the erection sequence.
  • the deeper fold lines have less resistance to bending and thus will fold more easily than the shallower fold lines.
  • the deeper fold lines are adjacent to those flaps which are folded first.
  • a paperboard blank particularly adapted for use with an automatic erection machine and foldable into a tubular configuration of the type wherein flaps are connected to at least one main panel along fold lines Qhfi wherein said flaps are separated from one another by offset slit lines extending from the fold line connecting said flaps to said main panel to the outer marginal edge of said flaps, the improvement in said blank which comprises:
  • a crush line substantially coextensive with said offset slit lines, said crush line defining an area of said paperboard blank that is substantially thinner than the original thickness of said paperboard blank and at least twice as wide as the amount of offset of said offset slit lines.
  • said crush line defines an area that is between 20 and 50% thinner than the original thickness of said paperboard blank.
  • said one fold line connecting the first of said flaps to be folded by an automatic erection machine to said main panel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Making Paper Articles (AREA)
  • Cartons (AREA)
US475790A 1974-06-03 1974-06-03 Paperboard blank with crushed offset flap edges and method for forming same Expired - Lifetime US3899120A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US475790A US3899120A (en) 1974-06-03 1974-06-03 Paperboard blank with crushed offset flap edges and method for forming same
CA223,975A CA1018128A (en) 1974-06-03 1975-04-07 Paperboard blank
FR7516177A FR2272905B1 (enrdf_load_stackoverflow) 1974-06-03 1975-05-23
DE19752523663 DE2523663B2 (de) 1974-06-03 1975-05-28 Papprohling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475790A US3899120A (en) 1974-06-03 1974-06-03 Paperboard blank with crushed offset flap edges and method for forming same

Publications (1)

Publication Number Publication Date
US3899120A true US3899120A (en) 1975-08-12

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US475790A Expired - Lifetime US3899120A (en) 1974-06-03 1974-06-03 Paperboard blank with crushed offset flap edges and method for forming same

Country Status (4)

Country Link
US (1) US3899120A (enrdf_load_stackoverflow)
CA (1) CA1018128A (enrdf_load_stackoverflow)
DE (1) DE2523663B2 (enrdf_load_stackoverflow)
FR (1) FR2272905B1 (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154388A (en) * 1978-02-02 1979-05-15 Willamette Industries, Inc. Box construction
FR2573005A1 (fr) * 1984-11-12 1986-05-16 Malvaux Sa Procede de fabrication d'un panneau a plates-bandes
US5160082A (en) * 1992-02-19 1992-11-03 Somerville Packaging Leak preventing blank and carton for ice cream and the like
EP0626692A3 (en) * 1993-05-27 1995-01-11 Trollhaettan Annonsreklam Ab Protective transport and storage envelope for flat objects such as compact discs and data disks and manufacturing processes for these protective envelopes.
US5823935A (en) * 1997-02-07 1998-10-20 Tetra Laval Holdings & Finance, S.A. Fiber densification knife
US6139480A (en) * 1999-01-28 2000-10-31 Tetra Laval Holdings & Finance, Sa Cutting device for effecting a partial cut in a packaging material, and a blank produced therefrom
US6467682B2 (en) 2000-03-07 2002-10-22 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US20050005746A1 (en) * 2000-04-26 2005-01-13 Linenberger Randolph M. Method for preparing three-dimensional signs
US20050014621A1 (en) * 2003-07-15 2005-01-20 Mcclure Jack A. Method of reducing folding resistance and correcting score line misregister and product of the method
WO2005005269A1 (de) * 2003-07-04 2005-01-20 Joachim Schropp Zuschnitt und faltschachtel
US9073664B2 (en) 2013-08-16 2015-07-07 International Paper Company Container with end sealing flaps

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790178A (en) * 1928-08-06 1931-01-27 Jr Daniel Manson Sutherland Fibre board and its manufacture
US2185885A (en) * 1938-09-13 1940-01-02 George W Swift Jr Inc Cutting mechanism
US3050229A (en) * 1959-07-24 1962-08-21 Lord Baltimore Press Inc Container and method and means for making same
US3432375A (en) * 1964-05-13 1969-03-11 American Can Co Method of raw edge protection

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790178A (en) * 1928-08-06 1931-01-27 Jr Daniel Manson Sutherland Fibre board and its manufacture
US2185885A (en) * 1938-09-13 1940-01-02 George W Swift Jr Inc Cutting mechanism
US3050229A (en) * 1959-07-24 1962-08-21 Lord Baltimore Press Inc Container and method and means for making same
US3432375A (en) * 1964-05-13 1969-03-11 American Can Co Method of raw edge protection

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154388A (en) * 1978-02-02 1979-05-15 Willamette Industries, Inc. Box construction
FR2573005A1 (fr) * 1984-11-12 1986-05-16 Malvaux Sa Procede de fabrication d'un panneau a plates-bandes
US5160082A (en) * 1992-02-19 1992-11-03 Somerville Packaging Leak preventing blank and carton for ice cream and the like
EP0626692A3 (en) * 1993-05-27 1995-01-11 Trollhaettan Annonsreklam Ab Protective transport and storage envelope for flat objects such as compact discs and data disks and manufacturing processes for these protective envelopes.
US5823935A (en) * 1997-02-07 1998-10-20 Tetra Laval Holdings & Finance, S.A. Fiber densification knife
US6139480A (en) * 1999-01-28 2000-10-31 Tetra Laval Holdings & Finance, Sa Cutting device for effecting a partial cut in a packaging material, and a blank produced therefrom
US6467682B2 (en) 2000-03-07 2002-10-22 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US6668525B2 (en) 2000-03-07 2003-12-30 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US20040198576A1 (en) * 2000-03-07 2004-10-07 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US6886311B2 (en) 2000-03-07 2005-05-03 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US6951530B2 (en) 2000-03-07 2005-10-04 Zsolt Toth Carton, a blank for producing a carton, and methods and apparatus for erecting, closing, and sealing a carton
US20050005746A1 (en) * 2000-04-26 2005-01-13 Linenberger Randolph M. Method for preparing three-dimensional signs
WO2005005269A1 (de) * 2003-07-04 2005-01-20 Joachim Schropp Zuschnitt und faltschachtel
US20050014621A1 (en) * 2003-07-15 2005-01-20 Mcclure Jack A. Method of reducing folding resistance and correcting score line misregister and product of the method
US9073664B2 (en) 2013-08-16 2015-07-07 International Paper Company Container with end sealing flaps

Also Published As

Publication number Publication date
FR2272905A1 (enrdf_load_stackoverflow) 1975-12-26
DE2523663B2 (de) 1976-10-21
DE2523663A1 (de) 1975-12-11
FR2272905B1 (enrdf_load_stackoverflow) 1978-09-22
CA1018128A (en) 1977-09-27

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Owner name: OI FOREST PRODUCTS STS INC., ONE SEAGATE, TOLEDO,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OWENS-ILLINOIS, INC.;REEL/FRAME:004744/0811

Effective date: 19870323

Owner name: OI FOREST PRODUCTS STS INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:OWENS-ILLINOIS, INC.;REEL/FRAME:004744/0811

Effective date: 19870323