US3285494A - Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof - Google Patents

Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof Download PDF

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Publication number
US3285494A
US3285494A US435212A US43521265A US3285494A US 3285494 A US3285494 A US 3285494A US 435212 A US435212 A US 435212A US 43521265 A US43521265 A US 43521265A US 3285494 A US3285494 A US 3285494A
Authority
US
United States
Prior art keywords
panel
box
corner
articulated
flaps
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
US435212A
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English (en)
Inventor
Thomas R Baker
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.)
Kliklok LLC
Original Assignee
Kliklok LLC
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 Kliklok LLC filed Critical Kliklok LLC
Priority to US435212A priority Critical patent/US3285494A/en
Priority to GB13987/65A priority patent/GB1055115A/en
Priority to DE19661536109D priority patent/DE1536109B1/de
Priority to SE2402/66A priority patent/SE315843B/xx
Application granted granted Critical
Publication of US3285494A publication Critical patent/US3285494A/en
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
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/64—Lids
    • B65D5/66—Hinged lids
    • B65D5/6626—Hinged lids formed by folding extensions of a side panel of a container body formed by erecting a "cross-like" blank
    • B65D5/665—Hinged lids formed by folding extensions of a side panel of a container body formed by erecting a "cross-like" blank the lid being held in closed position by self-locking integral flaps or tabs
    • B65D5/6661—Flaps provided over the total length of the lid edge opposite to the hinge
    • B65D5/6664—Flaps provided over the total length of the lid edge opposite to the hinge combined with flaps or tabs provided at the side edges of the lid
    • 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
    • B65D5/10—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 closures formed by inward-folding of self-locking flaps hinged to tubular body
    • 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
    • B65D5/20—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form
    • B65D5/30—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides
    • B65D5/301—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall
    • B65D5/302—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-up portions connected to a central panel from all sides to form a container body, e.g. of tray-like form with tongue-and-slot or like connections between sides and extensions of other sides the tongue being a part of a lateral extension of a side wall combined with a slot provided in an adjacent side wall

Definitions

  • coatings or films are extremely thin, the thickness being of the order of two to four hundredths of a millimeter per film.
  • the coating or film thickness in terms of weight per surface area.
  • the aforementioned box which had a board caliper of 14 points (14 thousandths of an inch) uncoated, had a total of seven pounds of high melting points applied to 1000 sq. feet of board (3.5 kg./ 100 sq. meters), more particularly at the rate of four pounds per one thousand square fee-t for the inside and three pounds per thosuand square feet for the outside. With both coatings the caliper increased to 17 points. In metric terms the four pound coating amounts to approximately 2 kg. per 100 square meters and the three pound coating to 1.5 kg. per 100 square meters.
  • Boxes of the aforementioned kind were previously sealed either by mechanical means, such as flaps or tabs inserted into slits or behind edges, followed generally by overwrapping, or they were sealed by means of an adhesive applied prior to, or at the time of, scaling in predetermined areas.
  • the thickness of the applied adhesive layer exceeds the thickness of the aforementioned coating considerably and because of its thickness the adhesive is capable of bridging gaps in the closure.
  • the present invention is based on the recognition that a reliable seal can be produced without any additional adhesive by means of the thin board coating alone even though the coating possesses no gap bridging properties whatever, which is readily appreciated when one compares the thickness of the total available coating material (for example 0.07 mm.) with the caliper of the board in uncoated condition (for example 0.34 mm.).
  • the end Wall structure comprises a box body end wall panel over which two corner lock flaps are folded which partially extend through slits in the 3,285,494 Patented Nov. 15, 1966 ICC end panel to form a mechanical corner lock.
  • the resulting unevenness of the box body end wall exceeds the thickness of the board.
  • the unevenness is reduced to zero and all major portions of the end Wall are brought into the same plane by mechanical bowing out of the end wall panel, the bowing out, in turn, being produced automatically by a particular configuration of the fold line along which the end wall panel is articulated to the bottom panel.
  • the fold line comprises three portions, viz., a central portion and two terminal portions.
  • the terminal portions are out of line with the central portion so that an imaginary chord passing through the far ends of the terminal portions is spaced from, and substantially parallel to, the central portion, the offset of the central portion with respect to the chord being to the outside of the box.
  • FIG. 1 is a plan view of a folding box blank incorporating the invention, only one-half of the blank being shown;
  • FIG. 2 is an elevational end view, partly in section, of the closed box
  • FIG. 3 is a section taken on line 3-3 of FIG. 2;
  • FIG. 4 is a perspective view, partly in section, of the sealed box.
  • the blank B shown in FIG. 1 comprises a central series of panels, more particularly a front wall panel 11, a bottom panel 12, a rear wall panel 13, a cover panel 14 and a cover front flap 15 articulated to one another along a front bottom fold line 16, a rear bottom fold line 17, a cover hinge line -18, and a front fiat fold line 19, respectively.
  • Two lateral series of panels extend from certain of the aforesaid panels. Only one-half of the symmetrical blank is shown in FIG. 1, it being understood that the half which is not shown is a mirror image of the illustrated
  • the lateral series of panels comprises, in order, a corner lock tflap 20, a box body end panel 21, a turther corner flap shaped as a lock flap -22, and a cover flap 23 articlulated to the central panels along a corner fold line 24, a bottom end told line 25, a corner fold line 26, and a cover end flap fold line 27, respectively.
  • corner lock flaps 20 and 22 are shown to have the familiar lock configuration as indicated at 28, and the end panel 21 comprises internal cuts or slits 29 into which the male lock elements 28 are insertable.
  • thermoplastic material which may be a highmelting point wax or a synthetic resin such as polyethylene.
  • the thickness of the coating or film is of the order above given.
  • the blank B is converted into box form B in the usual manner by folding the wall panels 11, 13 and 21 upright with respect to the bottom panel, folding the lock flaps 20 and 22 over the outside of the end panels 21, inserting the lock tips into the slits 29 and forcing the very points of the tips behind the flat portions 30 of the slits 29. This is known procedure.
  • the box B is then filled and the cover [folded into closing position ready [for sealing.
  • the cover panel 14 lies parallel to the box bottom and the cover flaps 15 and 23 overlie the trout and ends of the box (FIGS. 2 and 4).
  • the bottom end fold line comprises a central straight portion 31 between terminal portions 32, '33.
  • the terminal portions 32, 33 extend at an angle a with respect to the central portion and terminate at the corner points 34, 35.
  • An imaginary chord 36 may be drawn connecting these two points.
  • the chord is indicated by a dashdouble-dot line. This chord line 36 is not physically present in the blank, but is shown in the drawings to indicate the outward ofiset d of the bottom told line portion 31 with respect to the location occupied by the bottom end fold line in conventional boxes.
  • the length 1 of the terminal portions 32, 33 is somewhat longer than, or equal to, the length 1 of the bottom edge 37, 38 of the lock flaps 20, 22.
  • FIG. 3 The effect of this arrangement is illustrated in FIG. 3. It is seen that upon folding of the end panel 21 the central portion of the end panel 21 bows out along a length L.
  • the cover flap 23 can therefore make tull contact with the panel 21, particularly in the critical area immediately above the bottom told line 25, except for small spaces or depressend areas 39, 40 immediately adjacent the lateral edges of the lock flaps.
  • cover flap remains fiat and adheres not only to the end wall, but also to the corner flaps.
  • a folding box of paperboard oompmising a bottom panel; a pair of side panels articulated to opposite sides of the bottom panel, on end panel articulated to one end of the bottom panel along a bottom end fold line and :a pair of corner lock flaps articulated to said side panels along corner fold lines and folded over the end panel; a cover panel; anda cover flap articulated to said cover panel in a position to overlie said end panel and said corner flaps at least partially, in which said bottom end fold line comprises three portions, viz., a central portion and two terminal portions, said central portion being ofiset toward the outside of the box with respect to a imaginary chord connecting the far ends of the terminal portions, a curvature resulting in the end panel when folded at said bottom end fold line with respect to the bottom panel, said curvature being convex as viewed from the box outside which curvature brings the central portion of the wall panel into substantially the same plane as the corner lock flaps which overlie the end portions of the wall panel adjacent said corner fold lines.
  • a folding box of paperboard coated on both sides with a film of a thermoplastic material comprising a bottom panel; a front panel and a rear panel articulated to the sides of the bottom panel along a front and a rear bottom foldline, respectively; a pair of end panels articulated to the ends of the bottom panel along bottom end fold lines; corner lock flaps articulated to said front and rear panels along corner fold lines, folded to overlie the said end panels except for a flap portion which extends through slits in the respective end panels; a cover panel articulated to said rear panel along a cover hinge line; and a pair of cover side flaps articulated to the ends of the cover panel, said cover side flaps overlying the outside surface of the said end panels and that portion of the corner flaps which overlies the end panels and being bonded thereto by the thermoplastic coating material on the inside of the cover side flaps and on the outside of the end panels and corner lock flaps, the said bottom end told lines comprising, each, a central line portion and terminal line portions, the distance between the
  • a folding box blank of paperboard coated on both sides with a filmof thermoplastic material comprising a bottom panel; a front panel and a rear panel articulated to opposite sides of the bottom panel along a front and a rear bot-tom fold dine, respectively, and having slots therein for insertion of portions of the corner lock flaps hereinafter recited; a pair of end panels articulated to opposite ends of the bottom panel along bottom end fold lines; corner lock flaps articulated to the ends of said front and rear panels along corner fold lines; a cover panel anticulated to said rear panel along a cover hinge line; and a pair of cover side flaps articluated to opposite ends of the cover panel along side flap fold lines, the improvement which is characterized by the said bottom end fold lines, each, comprising a central line portion and a terminal line portion at each end of the central line portion, the distance between the central portions of opposite nSold lines being greater than the distance between hypothetical chords connecting the far ends Olf the terminal l-ine portions, the end panels when folded
  • a folding box blank as defined in claim 3 in which the "length of each terminal bottom end fold line portion exceeds the length of the bottom edge of the respective corner iock flap as measured in line with a hypothetical extension of the respective front and rear bottom fold line.
  • a folding box of paperboard comprising a box body, a box cover panel articulated to said body, and a cover flap articulated to said cover in a position to overlie a body Wall, said body wall being constructed of a wall panel and two corner lock flaps over-lying said wall panel, said wall panel being articulated to the remainder of the box body along a bottom fold line comprising three portions, viz., two terminal portions and a central portion, an imaginary chord connecting the far ends of the terminal portions being offset towards the box inside in relation to the central portion causing the central panel portion above said central fold line portion to bulge out when the panel is folded along said bottom fold line, the length of the terminal portions being such as to limit the bulge of the wall panel to that portion which lies between the overlying corner flaps.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Making Paper Articles (AREA)
US435212A 1965-02-25 1965-02-25 Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof Expired - Lifetime US3285494A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US435212A US3285494A (en) 1965-02-25 1965-02-25 Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof
GB13987/65A GB1055115A (en) 1965-02-25 1965-04-02 Improvements in folding boxes and blanks, particularly in regard to sealing by meansof a thermoplastic coating preapplied to both sides thereof
DE19661536109D DE1536109B1 (de) 1965-02-25 1966-02-24 Faltschachtel
SE2402/66A SE315843B (enrdf_load_stackoverflow) 1965-02-25 1966-02-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US435212A US3285494A (en) 1965-02-25 1965-02-25 Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof

Publications (1)

Publication Number Publication Date
US3285494A true US3285494A (en) 1966-11-15

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US435212A Expired - Lifetime US3285494A (en) 1965-02-25 1965-02-25 Folding boxes and blanks, particularly in regard to sealing by means of a thermoplastic coating preapplied to both sides thereof

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US (1) US3285494A (enrdf_load_stackoverflow)
DE (1) DE1536109B1 (enrdf_load_stackoverflow)
GB (1) GB1055115A (enrdf_load_stackoverflow)
SE (1) SE315843B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467296A (en) * 1966-04-11 1969-09-16 Riegel Paper Corp Packaging material and method of manufacturing the same
US3481525A (en) * 1968-08-02 1969-12-02 Kliklok Corp Interlocks for folding box panels
US3726468A (en) * 1971-04-13 1973-04-10 Container Corp Carton end wall structure
US5121878A (en) * 1988-03-04 1992-06-16 Sprinter System Ab Method of erecting a carton blank, a tool for carrying out the method and a carton blank used with the method
US20080035716A1 (en) * 2006-05-05 2008-02-14 Amy Hafkin Adaptable food storage box
USD664444S1 (en) 2011-04-22 2012-07-31 The Quaker Oats Company Carton blank portion
USD667309S1 (en) 2011-04-22 2012-09-18 The Quaker Oats Company Carton
CN105035460A (zh) * 2015-07-22 2015-11-11 青岛中龙彩印有限公司 一种环保鞋盒的折叠方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7802147U1 (de) * 1978-01-25 1978-10-12 Henkel Kgaa Faltschachtel
DE102014226580A1 (de) * 2014-12-19 2016-06-23 Henkel Ag & Co. Kgaa Verfahren zur Herstellung einer Faltschachtel sowie Gebinde mit einer Faltschachtel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554099A (en) * 1923-04-19 1925-09-15 John L Kolbe Interlocking joint for paper boxes
US2265326A (en) * 1939-03-02 1941-12-09 Diamond Paper And Box Co Collapsible box
US2809776A (en) * 1956-03-29 1957-10-15 Somerville Ltd Corner lock cartons
US2833459A (en) * 1954-06-09 1958-05-06 Sherman Paper Products Corp Set-up box and blank for forming the same
US3165253A (en) * 1961-09-05 1965-01-12 Crown Zellerbach Corp Carton construction and method of closing
US3176899A (en) * 1963-08-23 1965-04-06 Red Owl Stores Inc Egg carton
US3206098A (en) * 1964-05-26 1965-09-14 Bradford Speed Packaging And D End wall construction of folding boxes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415869A (en) * 1943-09-11 1947-02-18 Container Corp Carton

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1554099A (en) * 1923-04-19 1925-09-15 John L Kolbe Interlocking joint for paper boxes
US2265326A (en) * 1939-03-02 1941-12-09 Diamond Paper And Box Co Collapsible box
US2833459A (en) * 1954-06-09 1958-05-06 Sherman Paper Products Corp Set-up box and blank for forming the same
US2809776A (en) * 1956-03-29 1957-10-15 Somerville Ltd Corner lock cartons
US3165253A (en) * 1961-09-05 1965-01-12 Crown Zellerbach Corp Carton construction and method of closing
US3176899A (en) * 1963-08-23 1965-04-06 Red Owl Stores Inc Egg carton
US3206098A (en) * 1964-05-26 1965-09-14 Bradford Speed Packaging And D End wall construction of folding boxes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3467296A (en) * 1966-04-11 1969-09-16 Riegel Paper Corp Packaging material and method of manufacturing the same
US3481525A (en) * 1968-08-02 1969-12-02 Kliklok Corp Interlocks for folding box panels
US3726468A (en) * 1971-04-13 1973-04-10 Container Corp Carton end wall structure
US5121878A (en) * 1988-03-04 1992-06-16 Sprinter System Ab Method of erecting a carton blank, a tool for carrying out the method and a carton blank used with the method
US20080035716A1 (en) * 2006-05-05 2008-02-14 Amy Hafkin Adaptable food storage box
US7407088B2 (en) * 2006-05-05 2008-08-05 Amy Hafkin Adaptable food storage box
WO2007131091A3 (en) * 2006-05-05 2009-04-09 Amy Hafkin Adaptable food storage box
USD664444S1 (en) 2011-04-22 2012-07-31 The Quaker Oats Company Carton blank portion
USD667309S1 (en) 2011-04-22 2012-09-18 The Quaker Oats Company Carton
CN105035460A (zh) * 2015-07-22 2015-11-11 青岛中龙彩印有限公司 一种环保鞋盒的折叠方法

Also Published As

Publication number Publication date
DE1536109B1 (de) 1971-09-23
SE315843B (enrdf_load_stackoverflow) 1969-10-06
GB1055115A (en) 1967-01-18

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