US3259294A - Moulded pulp packing and method for producing same - Google Patents

Moulded pulp packing and method for producing same Download PDF

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Publication number
US3259294A
US3259294A US338420A US33842064A US3259294A US 3259294 A US3259294 A US 3259294A US 338420 A US338420 A US 338420A US 33842064 A US33842064 A US 33842064A US 3259294 A US3259294 A US 3259294A
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United States
Prior art keywords
packing
flap
locking
edge
locking flap
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Expired - Lifetime
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US338420A
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English (en)
Inventor
Hartmann Erik Louis
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SKANDINAVISK EMBALLAGE
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Individual
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    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/30—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure
    • B65D85/32—Containers, packaging elements or packages, specially adapted for particular articles or materials for articles particularly sensitive to damage by shock or pressure for eggs
    • B65D85/324—Containers with compartments made of pressed material

Definitions

  • the invention relates to a moulded pulp packing, especially a packing of this kind adapted to contain a number of eggs or other fragile or delicate objects, consisting of two parts, hinged together and constituting a lower part and an upper part, which parts when folded together enclose the objects, and of a locking flap hinged to the lower part.
  • a projection on the flap engages a corresponding aperture in the lateral wall of the upper part and locks the two parts together.
  • the said surface When packings are produced by machines from which the blanks in moist and therefore plastic condition are deposited on the plane surface of a conveyor, by which means they are passed through a drying kiln, the said surface must constitute a support for the blanks so as to preserve the shape imparted to them by the suction moulds.
  • the smoother surface is produced on the outer side of the packing and also in order to provide the most effective support, the blanks are so deposited on the conveyor that the lower side of the lower part and the upper side of the upper part will rest on the conveyor.
  • the locking flap which, in known packings, is on a level with the adjacent surfaces of the lower part and the upper part will have no support, so that it will be subject to buckling or to permanent deformation during the passage of the blank through the kiln, which may necessitate a subsequent pressing of the whole blank.
  • An object of the present invention is to provide such a locking flap construction that it does not adversely influence the nesting of the packings.
  • Another object of the invention is to provide a fiap structure preventing it from being deformed during the passage of the blanks through the drying kiln.
  • a further object of the invention is to provide a locking flap so shaped that it is easily produced on suction moulds and has a locking projection which furthermore ensures a safe locking.
  • a still further object of the invention is to provide a method for producing moulded pulp packings having the above properties.
  • the packing is produced with a locking flap occupying an outward oblique position and having a free edge portion lying in the plane of the bottom of the lower part.
  • the free edge portion of the locking flap be reinforced by means of an outwardly protruding ledge, which forms such an angle with the flap proper when in a downwardly oblique position that the ledge is located in the plane of the bottom of the lower part.
  • the flap proper and the ledge adjoin along a waved curve in the plane of the ledge in order to reduce the possibility of a swinging movement of the ledge in relation to the flap proper during drying.
  • the flap is provided with at least one projection shaped like a downwardly open nose, of uniform thickness and with a recess or opening therebelow, the width of which preferably increases towards the hinge edge of the flap.
  • the drawings illustrate an embodiment of the packing designed to contain ten eggs, placed in two rows.
  • the lower part of the packing has a shape which is specially designed for this purpose. It is emphasized, however, that the invention is not dependent on this design of the lower part, since it can be applied to other packings which are constructed of two parts hinged together, irrespective of their shape. Still, the invention is most suitable for packings in which the upper part is shaped as a trough with plane base and oblique lateral wall inclining at the slip necessary for the moulding of the blanks and the nesting of the packings.
  • FIG. 1 is a view of the packing fro-m above, in unfolded condition
  • FIG. 2 is a cross sectional view taken on the line II-II in FIG. 1 showing the packing in closed condition and on an increased scale;
  • FIG. 3 is a broken front view of the packing in closed condition showing the locking arrangement.
  • the packing according to the invention is produced by precipitating fibre pulp by suction on a mould having a reticulated or perforated surface, in such a manner that substantially the same thickness of material is applied to all portions of the packing.
  • the packing as shown in the drawings, comprises a lower part 10, an upper part 12 and a locking flap 14.
  • the upper part 12 and the flap 14 are integral with the lower part 10 and hinged to its opposite sides by means of fold lines 16 and 18, which act as hinges.
  • a number of depressions 20 are provided in the lower part 10, each of which is designed to receive one end of an egg.
  • the design of the lower part is otherwise determined by the need for providing the requisite strength and rigidity, which, however, is not relevant to the present invention.
  • the upper part 12 of the packing is provided with an oblique lateral wall 22 having an undulating outline arranged to fit around the outer surfaces of the upper portions of the eggs as shown in FIG. 1, and a flat top wall 24.
  • the upper and lower parts are provided with edge flanges 26 which abut against one another when the packing is closed, except along the front, as shown in FIGS.
  • the flap 14 comprises an oblique wall 28 extending upwardly from its flange 2'7 and having the same undulating outline as the part of the lateral wall 22 of the upper part 12 overlying the flap 14, and a ledge 30 forming an angle with the wall 28, equal to the angle between the top 24 and the oblique lateral wall 22 of the upper part 12, as shown in section in FIG. 2.
  • the locking flap 14 For the purpose of locking the said packing in closed condition there are provided on the locking flap 14, as shown in FIGS. 2 and 3, two spaced projections 32 cooperating respectively with rectangularly-shaped apertures 34 in the adjacent lateral wall 22 of the upper part 12.
  • the locking projections 32 are located at the free edge portion of the flap 14, where it adjoins the ledge 30, as shown in FIG. 2 of the drawings.
  • Each projection 32 is shaped like a nose or a lip, open at the bottom, having an inclining front wall 36 (FIG. 2) and two parallel lateral walls 38.
  • a U-shaped reinforcement in the form of an encircling external head 40 is provided along the lower outside edge portions of the inclining wall 36 and the side walls 33.
  • a recess or opening 42 is provided or left in the oblique wall 28 of the locking flap 14 below each projection 32 for facilitating the release of the packing blank from the mould.
  • the width of the openings 42 increases from the bottom of the beads 40 toward the fold line 18 or flange 27 as shown in dotted lines in FIG. 3.
  • the openings 42 also provide weakened areas in the locking flap which facilitate the movement of the projections 32 inwardly to release the upper portion of the packing.
  • the shape and location of the openings 42 facilitate removal of the packings from the mould, since the openings are left in the packing by being formed around projecting portions of the mould which have portions extending along the lower faces of the beads 40. At the end of a moulding operation, the projecting part of the mould extends through the opening 42.
  • the mould includes projecting portions over which the locking projections 32 are formed.
  • the locking flap 14 When the packing is to be closed, the locking flap 14 is swung about the fold line 18 from the dotted line position shown in FIG. 2, upwardly and inwardly into the position shown in full lines, whereupon the upper part 12 is swung about the fold line 16 upwardly and inwardly, until it comes to rest against the lower part 10 and the flange 27. During the last phase of this movement the front of the lateral wall 22 of the upper part under the openings 34 will be forced outwardly and thereupon spring back, the projections 32 simultaneously engaging the respective openings 34. An internal reinforcing head 44 is provided at the lower edge of each opening 34 over which the projections 32 slide. In locked condition the ledge 30 of the locking flap 14 extends along the lower side of the plane top 24 of the upper part, as shown in FIG. 2.
  • the shape of the projections 32 herein described as a downwardly open nose or lip makes it possible to make the thickness of the material of the projections the same as that of the other parts of the packing, and when the packing is produced with the locking flap 14 in the position shown in dotted lines in FIG. 2, the flap forms no obstacle to the nesting of the packings.
  • a moulded pulp packing including a hollow lower part and an upper cup-shaped part having an oblique lateral wall so as to be readily releasable from the mould in which the packing is formed, said parts being hinged together with a lower edge of the upper part hinged to an upper edge of the lower part, and a locking flap hinged by its lower edge to the upper edge of the lower part opposite the position of the hinge between the upper and lower parts, said locking flap extending upwardly within and along the oblique wall of the upper part when it is in closed position and including a locking projection cooperating with an opening in said oblique wall of the upper part to lock the packing in closed condition when the upper part is brought over the lower part and the locking flap, and in which the locking projection is located at the upper portion of the locking flap, said locking flap being provided with a recess therein extending downwardly from the lower edge of the locking projection, and an outwardly-projecting reinforcing bead extending around the lower edge of the locking projection.
  • a moulded pulp packing including a hollow lower part and an upper cup-shaped part having an oblique lateral wall so as to be readily releasable from the mould in which the packing is formed, said parts being hinged together with a lower edge of the upper part hinged to an upper edge of the lower part, and a locking flap hinged by its lower edge to the upper edge of the lower part opposite the position of the hinge between the upper and lower parts, said locking flap extending upwardly within and along the oblique wall of the upper part when it is in closed position and including a locking projection cooperating with an opening in said oblique wall of the upper part to lock the packing in closed condition when the upper part is brought over the lower part and the locking flap, and in which the locking projection is shaped like a downwardly open nose and is located at the upper portion of the locking flap, said locking flap being provided with a recess therein extending downwardly from the lower edge of the locking projection.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packaging Frangible Articles (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
US338420A 1963-03-12 1964-01-17 Moulded pulp packing and method for producing same Expired - Lifetime US3259294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK113363AA DK104160C (da) 1963-03-12 1963-03-12 Fremgangsmåde til fremstilling af pakninger til et antal æg eller andre skøre eller følsomme genstande og ved fremgangsmåden fremstillet pakning.

Publications (1)

Publication Number Publication Date
US3259294A true US3259294A (en) 1966-07-05

Family

ID=8101389

Family Applications (1)

Application Number Title Priority Date Filing Date
US338420A Expired - Lifetime US3259294A (en) 1963-03-12 1964-01-17 Moulded pulp packing and method for producing same

Country Status (7)

Country Link
US (1) US3259294A (enrdf_load_stackoverflow)
DE (1) DE1486610A1 (enrdf_load_stackoverflow)
DK (1) DK104160C (enrdf_load_stackoverflow)
FI (1) FI43410B (enrdf_load_stackoverflow)
GB (1) GB1010869A (enrdf_load_stackoverflow)
NL (1) NL139711B (enrdf_load_stackoverflow)
SE (1) SE303109B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298594A (en) * 1965-08-11 1967-01-17 Container Corp Egg carton
US3372854A (en) * 1967-07-27 1968-03-12 Dow Chemical Co Latch arrangement for egg cartons
US3388852A (en) * 1966-05-26 1968-06-18 Diamond Int Corp Latch means for cartons
US3735917A (en) * 1971-04-27 1973-05-29 Mobil Oil Egg carton construction
US4463894A (en) * 1981-09-08 1984-08-07 Mobil Oil Corporation Method and mold for making an improved egg carton
US20050274642A1 (en) * 2002-04-17 2005-12-15 Bro-Drene Hartmann A/S Display package
US20100187150A1 (en) * 2007-05-24 2010-07-29 Huhtamaki Nederland B.V. Packaging unit
USD632974S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632975S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632977S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632976S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
US20150314948A1 (en) * 2011-09-13 2015-11-05 Brødrene Hartmann A/S A Display and Distribution Package for Eggs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4383638A (en) * 1981-09-29 1983-05-17 Diamond International Corporation Carton lock

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446264A (en) * 1943-09-20 1948-08-03 Shellmar Products Corp Molded pulp carton
US2600130A (en) * 1945-12-03 1952-06-10 Shellmar Products Corp Egg carton
US2752084A (en) * 1953-09-09 1956-06-26 Keyes Fibre Co Carton
US2843304A (en) * 1952-11-20 1958-07-15 Diamond Gardner Corp Molded pulp carton lock
US3028065A (en) * 1960-02-03 1962-04-03 Diamond National Corp Molded pulp egg carton
US3034693A (en) * 1955-11-22 1962-05-15 Diamond National Corp Egg carton
US3144973A (en) * 1962-04-02 1964-08-18 Herman Wilbert Carton latch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446264A (en) * 1943-09-20 1948-08-03 Shellmar Products Corp Molded pulp carton
US2600130A (en) * 1945-12-03 1952-06-10 Shellmar Products Corp Egg carton
US2843304A (en) * 1952-11-20 1958-07-15 Diamond Gardner Corp Molded pulp carton lock
US2752084A (en) * 1953-09-09 1956-06-26 Keyes Fibre Co Carton
US3034693A (en) * 1955-11-22 1962-05-15 Diamond National Corp Egg carton
US3028065A (en) * 1960-02-03 1962-04-03 Diamond National Corp Molded pulp egg carton
US3144973A (en) * 1962-04-02 1964-08-18 Herman Wilbert Carton latch

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3298594A (en) * 1965-08-11 1967-01-17 Container Corp Egg carton
US3388852A (en) * 1966-05-26 1968-06-18 Diamond Int Corp Latch means for cartons
US3372854A (en) * 1967-07-27 1968-03-12 Dow Chemical Co Latch arrangement for egg cartons
US3735917A (en) * 1971-04-27 1973-05-29 Mobil Oil Egg carton construction
US4463894A (en) * 1981-09-08 1984-08-07 Mobil Oil Corporation Method and mold for making an improved egg carton
US7665608B2 (en) * 2002-04-17 2010-02-23 Bro-Drene Hartmann A/S Display package
US20050274642A1 (en) * 2002-04-17 2005-12-15 Bro-Drene Hartmann A/S Display package
US20100187150A1 (en) * 2007-05-24 2010-07-29 Huhtamaki Nederland B.V. Packaging unit
USD632974S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632975S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632977S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
USD632976S1 (en) * 2009-10-29 2011-02-22 Huhtamaki Nederland Bv Egg carton
US20150314948A1 (en) * 2011-09-13 2015-11-05 Brødrene Hartmann A/S A Display and Distribution Package for Eggs
US10000332B2 (en) * 2011-09-13 2018-06-19 Brødrene Hartmann A/S Display and distribution package for eggs

Also Published As

Publication number Publication date
DE1486610A1 (de) 1969-07-17
NL6400940A (enrdf_load_stackoverflow) 1964-09-14
FI43410B (enrdf_load_stackoverflow) 1970-11-30
GB1010869A (en) 1965-11-24
SE303109B (enrdf_load_stackoverflow) 1968-08-12
DK104160C (da) 1966-04-12
NL139711B (nl) 1973-09-17

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