EP2590866A1 - Récipient d'emballage - Google Patents

Récipient d'emballage

Info

Publication number
EP2590866A1
EP2590866A1 EP11803912.2A EP11803912A EP2590866A1 EP 2590866 A1 EP2590866 A1 EP 2590866A1 EP 11803912 A EP11803912 A EP 11803912A EP 2590866 A1 EP2590866 A1 EP 2590866A1
Authority
EP
European Patent Office
Prior art keywords
male
female
packaging container
tray
lid
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.)
Withdrawn
Application number
EP11803912.2A
Other languages
German (de)
English (en)
Inventor
John Shand
Erik Svensson
Aldin Becirovic
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.)
Pakit International Trading Co Inc
Original Assignee
Pakit International Trading Co 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 Pakit International Trading Co Inc filed Critical Pakit International Trading Co Inc
Publication of EP2590866A1 publication Critical patent/EP2590866A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/14—Non-removable lids or covers
    • B65D43/16—Non-removable lids or covers hinged for upward or downward movement
    • B65D43/162—Non-removable lids or covers hinged for upward or downward movement the container, the lid and the hinge being made of one piece
    • 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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
    • B65D43/022—Removable lids or covers without integral tamper element secured only by friction or gravity only on the inside, or a part turned to the inside, of the mouth of the container
    • 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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
    • B65D43/0222—Removable lids or covers without integral tamper element secured only by friction or gravity only on the outside, or a part turned to the outside, of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00027—Stackable lids or covers
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00101—Shape of the outer periphery curved square-like or rectangular-like
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00268—Paper
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00398—Reinforcing ribs in the central part of the closure
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00398—Reinforcing ribs in the central part of the closure
    • B65D2543/00416—Reinforcing ribs in the central part of the closure circular
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00509—Cup
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/00657—U-shaped or inverted U
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00675—Periphery concerned
    • B65D2543/00685—Totality
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00675—Periphery concerned
    • B65D2543/00694—Segments
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00722—Profiles
    • B65D2543/00768—U-shaped or inverted U
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00787—Periphery concerned
    • B65D2543/00796—Totality
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00787—Periphery concerned
    • B65D2543/00805—Segments
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00833—Integral tabs, tongues, handles or similar
    • B65D2543/00842—Integral tabs, tongues, handles or similar outside of the lid

Definitions

  • the present invention relates to a packaging container made of a cellulose fibre material, comprising a bottom part, in this context referred to as tray, and a top part, referred to as lid, said tray and lid provided with closure means including first closure means of a male rim portion of the tray and second closure means of a female rim portion of the lid cooperating with said first closure means when the packaging container is closed.
  • WO 2006/057610 discloses a method and a machine for making fibre products from stock, preferably stock made from chemithermomechanical pulp (CTMP), although also other pulp than CTMP can be contemplated.
  • CTMP chemithermomechanical pulp
  • the machine comprises a set of male tools and a matching set of female tools, in which it is possible to manufacture moulded products of a fibre material which possesses some valuable features, amongst which may be mentioned a high tensile strength, a significant stiffness and bending resistance, good insulation properties, and, not least important, the products are made of a material which does make use of fossil raw materials. All these features are beneficial for some specific products in the packaging art, such as for packaging take-away fast food to be eaten hot, e.g.
  • a container which advantageously may be used for packaging food which is hot when the food is placed in the container and which may be maintained hot for a considerable period of time, such that the food will not be cooled down while it e.g. is taken home from a take-away bar or restaurant, which container is provided with closure means which are not of the snap-fit type or of other type requiring moulds having negative draft angles. It is in other words an objective to provide a packaging container which can be manufactured employing the above mentioned prior art.
  • closure means which in most respects are at least as good as snap-fit type closure means and in some respects includes improvements over many conventional snap-fit type as well as other types of closure means.
  • closure means which are very tight and therefore has a favourable impact on the heat maintenance capacity of the container. In this connection should be mentioned that this effect can be achieved according to the invention without use of heat-sealing, adhesive tape sealing, gluing or the like.
  • Fig. 1 shows a first embodiment of an assembled packaging container according to the invention
  • Fig. 2 and Fig. 3 show a stack of trays and lids, respectively, (the lids upside down) of the types included in the packaging container shown in Fig. 1,
  • Fig. 4 shows an end part of a vertical, cross-sectional view along a longitudinal centre line IV-IV of the packaging container shown in Fig. 1,
  • Fig. 5 shows a second embodiment of a closed packaging container of the invention; a first type clamshell packaging container, in a view showing the hinge side, referred to as rear side, and one other side, referred to as left side,
  • Fig. 6 shows the rear side of the closed packaging container of Fig. 5
  • Fig. 7 is a side view of the first type clamshell packaging container in its open state with the tray to the left and the lid to the right in the drawing,
  • Fig. 8 shows the same open container as Fig. 7 in a view obliquely from above
  • Fig. 9 is a cross-sectional view of the container of Figs 5-8 in a vertical symmetry plane as viewed obliquely from above, illustrating the final stage of a closing operation
  • Fig. 9A shows an encircled detail of Fig. 9 at larger scale
  • Fig. 9B illustrates a mathematical model in the form of graph of a detail of the tray included in the locking mechanism which is shown also in Fig. 9A
  • Fig. 10 is a cross-sectional view of the closed container
  • Fig. 11 is a cross-sectional view of the container of Figs. 5-10 showing the inside side of a corner of the closed container,
  • Fig. 12 is a cross-sectional view of a third embodiment of the invention. a second type clamshell container in a vertical symmetry plane of the container as closed,
  • Fig. 12A shows a detail of Fig. 12 at a larger scale
  • Fig. 13 is a perspective view of a fourth embodiment of the invention. a third type clamshell container in its open state as viewed obliquely from above,
  • Fig. 14 is a top view of the container of Fig. 13,
  • Fig. 15 is a side view of the container of Fig. 13 and Fig. 14,
  • Fig. 15A is a side view of the container of Fig. 15, illustrating how the container members may be accommodated relative to one another in a manufacturing mold
  • Fig. 16 shows the closed container of Figs. 13-15 in a vertical, longitudinal cross sectional plane along a central symmetry line
  • Fig. 16 shows the closed container of Figs. 13-15 in a vertical, longitudinal cross sectional plane along a central symmetry line
  • Fig. 16A shows an encircled detail of Fig.16 at a larger scale.
  • packaging containers according to the first, second, third and fourth embodiments of the invention are generally designated 100, 200, 300, and 400, respectively. They consist of a cellulose fibre material and are manufactured from stock according to the prior art technique which is disclosed in the above mentioned
  • WO2006/057610 which means that the container parts, i.e. the lids and trays, do not have any negative draft angles with respect to the direction of mould release in connection with the manufacturing of the products.
  • the thickness of all parts and details of the containers is in the order of 0.1 - 1.0 mm, but all details of the containers need not necessarily be, and in some case should not be, equally thick.
  • the assembled packaging container 100, Fig. 3, consists of a bottom part 101 and a top part 102, referred to as tray 101 and lid 102, respectively.
  • the trays 101 and lids 102 may be stacked separately, Fig. 2, in dispensing devices which are not shown but which may be of a conventional or new, convenient type.
  • the tray 101 has a basically flat bottom 103, two opposite, longitudinal and convexly curved side walls 104, two opposite, convexly curved end walls 105, and rounded wall corners 106.
  • Each side wall 104, each end wall 105, and each wall corner 106 consists of two wall sections, namely a first wall section 104a and 105a and first corner section 106a, respectively, which extends from the bottom 103 to a shelf plane 107 which is parallel with the bottom 103 and is horizontal when the tray rests on a horizontal surface, and a second section 104b and 105b, and corner wall section 106b, which extends from said shelf plane 107 to a flange plane 108, which is defined by the upper, horizontal surface of a flange 110.
  • the tray 101 has a circumferential shelf 109 which is flat.
  • the upper surface of the shelf 109 coincides with and defines said shelf plane 107
  • the upper surface of the flange 110 coincides with and defines said flange plane 108.
  • the outer edge section 111 of the flange 110 is bent obliquely downwards.
  • the first wall sections 104a and 105a, as well as the second wall sections 104b and 105b are inclined outwards, at angles a and ⁇ , which amount to about 21° and 18°.
  • the second wall sections 104b, 105b and second corner sections 106b, together with the shelf 109 define a truncated cone, forming a female member 126 of the cone clutch. Also the
  • circumferential flange 110 the considerable width of the flange 110, as well as the circumferential, obliquely directed edge section 111, form part of the locking mechanism therein that they contribute to a significant rigidity of the second wall sections 104b, 105b, which is important for the functioning of the locking mechanism, as will be described in the following.
  • said cone clutch the outside surfaces 120' and 121 ' of the male member 124 and the inside surfaces 104b' and 105b' of the female member 126 contact one another under pressure in the mode characteristic for cone clutches in general.
  • a specific feature of the cone clutch employed in the packaging container according to the first embodiment of the invention is that the surfaces 120', 121 ' and 104b ',105b' which are in contact with one another under pressure, expose a cellulose fibre material. When these surfaces are pressed together, fibres from the two engaging materials inevitably interact with one another at least physically. This is believed significantly enhances the frictional drag between the contacting packaging materials of the invention as compared with most other packaging materials. It is possible to promote this effect still further by intentionally making the interacting surfaces of the locking mechanism rougher that the rest of the product. A conceived developed embodiment of the invention employs this feature.
  • angle ⁇ is defined as the angle between on one hand the lines 127 of intersection between the fibre material surfaces 120', 12 ⁇ ; 104b ',105b' of the male and female members 124, 126 which contact one another, and a first vertical plane, which is a radial plane, and on the other hand a vertical plane 128 which is perpendicular to said first plane.
  • the lid 102 has a central panel 115, two opposite, longitudinal and convexly curved inner side walls 116, two opposite and convexly curved inner end walls 117, rounded inner wall corners 118, and a circumferential base 119 which is horizontally directed outwards and integrally connected to the lower end of the side walls 116 and end walls 117.
  • the width of the bottom of said base 119 corresponds to the width of the shelf 109 of the tray 101.
  • the lid 102 has two opposite, longitudinal and convexly curved outer side walls 120, two opposite and convexly curved outer end walls 121 and rounded outer wall corners 122.
  • the said outer side and end walls 120, 121 and rounded outer corner walls 122 are integrally connected to the base 119 at the periphery thereof and are inclined upwards-outwards, forming an angle to a vertical plane equal with the inclination angle ⁇ of the second end wall sections 104b, 105b and second corner section 106b or - preferably - slightly larger than inclination angle ⁇ before the lid 102 has been attached into locking connection with the tray 101.
  • the length of each of said outer walls 120, 121 and 122 equals the corresponding length of said second wall sections 104b, 105b and 106b of the tray in any radial, vertical plane through the packaging container.
  • the said outer walls 120, 121 and 122 of lid 102 also, like the second wall sections 104b, 105b and 106b of tray 101, define a truncated cone, which matches the truncated cone of the tray 101 in the assembled packaging container, Fig. 3 and Fig. 4.
  • the lid 102 is also, like the tray 101, provided with a flat, circumferential flange 123 which is integrally connected to the upper end of the said outer walls 120, 121 and 122. The flange 123 of the lid 102 contacts the flange 110 of the tray when the container is assembled.
  • the radial width of flange 123 is smaller than the corresponding width of flange 110 of the tray, contributing to make the locking member assembly of the tray 101 stiff er than the locking member assembly of the lid 102.
  • the flange 123 of the lid 102 has a protrusion 125 on each end of the container, serving as handle.
  • the inner side and end walls 116, 117, the base 119, and the outer side and end walls 120, 121 in combination form a male member, generally designated 124, Fig. 4, which in cross-section has the shape of a blunt wedge.
  • the male member 124 of the lid 102 is pressed down into the female member 126 of tray 101, so far that the base 119 of the lid 102 contacts the shelf 109 and the flange
  • the inclination angle of the outer side of said wedge-like male member 124 of the lid 102 conveniently is somewhat larger than the inclination angle ⁇ of the female member (the circumferential second wall sections 104b- 106b) of the tray 101 causing the outer side walls 120-122 of the lid 102 to be successively pressed against the successively matching wall sections 104b- 106b until the base 119 of the male member contacts the shelf 109 of the tray 101, causing a cone clutch connection between the lid 102 and the tray 101.
  • the lid 102 is larger than the tray 101 in the horizontal direction in the region of the interacting male and female members, which also promotes a cone clutch connection between the lid 102 and the tray 101.
  • the outer walls 120-122 of the male member are slightly deflected by the stiffer peripheral assembly 104b- 106b, 110, 111 of the tray 101, which works as a counter force, a dolly, against the male members, such that the outer walls 120-122, when the base 119 contacts the shelf 109, will snug fit under some pressure against said second wall sections 104b- 106b of the tray 101.
  • the size of deflection partly depends on the manufacturing accuracy of the packaging container parts but is controlled by empirically based choice of the inclination angles of the conical surfaces that shall face one another in the closed container.
  • the deflection may amount to between 0.5 - 1.0 times the thickness of the walls 120-122 of the male member of the lid 102.
  • the snug fit that is achieved, whether or not depending on deflection, also means that the outer fibre material surfaces of the conical outer walls 120-122 of the lid 102 are in very efficient contact with the facing fibre material surfaces of the conical walls 104b- 106b of the tray
  • the first type clamshell packaging container 200 consists of a tray 201 and a lid 202 connected to one another through a hinge 203.
  • the hinge 203 is made in connection with the manufacturing of the container in a mould, in which the stock is compressed more strongly between the hinge forming parts of mould tools than between the other parts of tools.
  • the main parts of the tray 201 are a bottom panel 204, a rear wall 205, a front wall 206, left and a right hand side wall 207 and 208, respectively, and a circumferential rim 209.
  • the lid 202 correspondingly has a top panel 214, a rear wall 215, a front wall 216, a left and a right hand side wall 217 and 218, respectfully, and a circumferential rim 219.
  • the rim 209 of the tray 201 and the rim 219 of the lid 202 have four sections of different shapes along the periphery of the tray and lid, respectfully, namely
  • a first section 209a and 219a respectfully, at the rear end of the container
  • a second and third section 209b and 209c, and 219b and 219c in the corner between the rear and the left hand side of the container, and in the corner between the rear and the right hand side of the container respectfully
  • a fourth section 209d and 219d along the rest of the periphery of the tray and of the lid, respectfully, i.e. along the left and right hand sides, the front side and the corners between the front side and left and right hand sides.
  • the design of the fourth sections 209d and 219d of the rims 209 and 219 of the non-closed packaging container 200 shall be described with reference to Fig. 9A and Fig. 9B.
  • the rim 209 forms the upper edge of the front and side walls 206, 207, 208.
  • first inner segment 209d' which is straight and may be defined as an extension of the side wall 206; a second inner segment 209" which is convexly bent and extends from the end of the first segment up to a vertex 209V; a first outer segment 209d” ', which also is convexly bent and extends from said vertex 209V to a point of inflection 2091; and a concave outermost edge 209d IV'
  • the fourth rim section 219d of the lid 202 also has four segments of different design.
  • a first segment 219d' is concave relative to the outside.
  • the tangent to the rim 219 of the lid forms an angle ⁇ to a vertical line in the same vertical sectional plane, while the tangent to the rim 209 forms an angle ⁇ to said vertical line, which angle ⁇ is larger than said angle ⁇ .
  • the difference is not large in terms of degrees or minutes but nevertheless of significant importance for the functioning of the locking mechanism of this second embodiment of the invention.
  • the curvature of the said bend is designed such that the fourth rim section 209d, when subjected to a force by the lid 219 in the point of contact P in the region of said first outer segment 209d' ", will be further bent and that the further bending of the rim 209d of the tray will take place in the region of the second, inner segment 209d".
  • the packaging container 300 is a second type clamshell packaging according to a third embodiment of the invention.
  • container 300 consists of a tray 301 and a lid 302 connected to one another through a hinge 303 of the same type as hinge 203; see foregoing description.
  • the main parts of the tray 301 consist of a bottom panel 304, a rear wall 305, a front wall 306, a left and a right hand side wall 307 (not shown) and 308, respectively, and a circumferential rim 309.
  • the lid 302
  • rims 309 and 319 have four sections of different shapes along the periphery of the container 300, namely
  • a fourth section 309d and 319d along the rest of the periphery of the tray and of the lid, respectfully, i.e. along the left and right hand sides, the front side and the corners between the front side and the left and right hand sides.
  • the first, second and third sections 309a,319a; 309b, 319b; and 309d,319d of clam shall packaging are designed according to the same principles as according to the second embodiment and will therefore not be explained in any detail. It is, however, true that the container 300 as illustrated in the drawing in Fig. 12 is more flat than container 200, but also a more voluminous container can be contemplated, as is indicated through the line of dashes in Fig. 12, without departing from the principles of the invention according to this third embodiment.
  • the design of the fourth section 319d' of rim 319 of container 300 differs from that of fourth section 219d of rim 219 of container 200 in that said first, straight segment 319d' has an extended length, at least as long as the length of the third segment 319d' ".
  • said straight first segment 319d' of the lid 302 matches the first segment 309d' of the rim of the tray 301, which first tray rim segment 309d' forms an upper part of the straight front 306 and side walls 307, 308 of the tray 301, wherein said first segments 319d' and 309d' engage one another cone clutch- wise in the locked packaging container, Fig. 12.
  • the second segments 309d" and 319d" as well as the third segments 309d” ' and 319d' " are in principle designed as the corresponding segments of the container rims 209 and 219 of container 200. Also the procedure of engagement between these male and female members is performed in the same mode as has been described in the foregoing with reference to Fig. 9A and Fig. 9B. Therefore, this description of procedure will not be repeated here. Instead, reference is made to the previous description of procedure and to Fig.
  • the third segment 309d' ' ' of the tray ' s rim section 309d is deflected inwards by the third segment 309d"' of the lids ' s fourth rim section 319d, causing increased bending of the intermediate second segment 309d' ' and tightening it in its capacity of a spring.
  • the edge portions 309d IV and 319d IV contact one another, also the first segment 309d' of the rim of the lid 309 contacts the corresponding segment 319 d' of the rim of the tray 301, i.e. also a cone clutch is established between these segments of the locking mechanism.
  • the packaging container 400 which is illustrated in Figs. 13-16A, is a third type clamshell packaging.
  • container 400 consists of a tray 401 and a lid 402 connected to one another through a hinge 403 of the same type as hinges 203 and 303.
  • the main parts of the tray 401 are a bottom panel 404, a rear wall 405, a front wall 406, a left hand side wall 407, a right hand side wall 408, and a circumferential rim 409.
  • the lid 402 has a top panel 415 and a circumferential rim 419 and is in principle flat according to the embodiment, as distinguished from the lid 302 of the third embodiment of the invention (although convex type lids may be considered in connection with the fourth embodiment as well). Further, also in accordance with the foregoing second and third embodiments, the rims 409 and 419 have four sections of different shapes along the periphery of the container 300, namely
  • the fourth embodiment has many features in common with especially the second embodiment, which is described in the foregoing, but is distinguished from that embodiment particularly as far as the design of the fourth section 419d of the lid 402 is concerned.
  • the difference is best understood by reference to Fig. 16 A.
  • the locking mechanism of the invention according to the embodiment is shown in cross section at an enlarged scale, illustrating the interaction between the rim section 419d of the lid 402 and the rim section 409d of the tray 401.
  • the dashed line represents the shape of the rim section 409d in said fourth section prior to locking of the container and prior to engagement between the two lids.
  • the rim section 409d In the pre- locking, "free state" of the rim section 409d, it has four segments, namely a first, inner segment 409', which is an extension of the side wall 406 and is straight, a second segment 409" which is convexly bent and includes a vertex 409V, a third, outer segment 409d” 'which is straight and of short length, or consists of an inflection point or inflection region of infinitesimal length, and a fourth, outermost edge segment 409d IV which is concave.
  • a first, inner segment 409' which is an extension of the side wall 406 and is straight
  • a second segment 409" which is convexly bent and includes a vertex 409V
  • a third, outer segment 409d" ' which is straight and of short length, or consists of an inflection point or inflection region of infinitesimal length
  • a fourth, outermost edge segment 409d IV which is concave.
  • the fourth rim section 419d of the lid correspondingly consists of four segments, namely a first straight, basically horizontal segment 419d' which also could be defined as an outer part of the top panel 415, a second, convex segment 419d" ', a third, outer segment 419d” ' which is straight or at least basically straight and of considerable length, and a fourth segment 419d Iv which is concave.
  • the third segment 409d" ' of the rim section 409d of the tray 402 in the pre-locking state of said rim section, forms an angle ⁇ to a vertical line in the cross sectional plane of Fig. 16A, and the third segment 419d" ' of the fourth rim section 419d of the lid 402 forms an angle ⁇ to the same vertical line.
  • the members of the locking mechanism assembly which consists of the fourth rim sections 409d and 419d of the tray 401 and of lid the 402, respectively, in combination, have the following distinctive features:
  • the third segment 419' " of the lid 419 is significantly longer than the third segment 409' " of the tray.
  • this feature can be expressed in the following terms; namely that the vertical distance D419 from the first segment 419d' to the tip 430 of the fourth segment 419d IV of the lid 402 in said cross sectional plane, is significantly longer than the vertical distance D409 from the vertex 409V to the tip 429 of the fourth segment 409d IV of the tray 401.
  • it is at least 60 % longer and suitably at least 80 % longer. In the disclosed embodiment, it is in the order of 100 % longer.
  • the angle ⁇ as defined above is significantly smaller than the angle ⁇ as defined above.
  • the angle ⁇ amounts to between 5° and 15°, while the angle ⁇ amounts to between 20° and 40°.
  • draft angles normally must not be smaller than 14°
  • the horizontal extension L419 of the fourth segment 419d IV of rim section 419d of lid 402 is significantly longer than the horizontal extension L409 of the fourth segment 409d IV of the tray 401, which provides a desired stiffness to the fourth section 419d against deflection in the horizontal direction.
  • the fourth segment 419d Iv of rim section 419d of lid 402 is in the order of twice as long or longer in the horizontal direction than the corresponding segment 409d of the tray 401.
  • the outer parts, i.e. the parts outside of the vertex 409V, of the fourth segment 409d of the tray, are deflected by the fourth segment 419d of the lid 402, as is illustrated in Fig. 16A, during the closing and locking operation.
  • the very tip 429, which has an advantageously sharp edge, of the fourth segment 409d IV of the tray 401 is pressed against the inside surface of the rim 419 of the lid by spring force developed by the rim of the tray 401 due to its deflection.
  • the uneven structure of the inside surface of the rim 419 in the region of contact with the sharp edge of tip 429 of the fourth segment 409d IV of the tray 401 is important for the achievement of an efficient locking grip between the two rims.
  • the packaging containers are manufactured according to a method described in document WO 2006/057610, said method for producing a fibre product (e.g. a container) from a stock solution substantially comprising the following steps:
  • said first and second tools used for manufacturing the fibre products comprise particles that have been sintered together to form a porous body which is permeable to air and water.
  • Fig. 15A there is seen a side view of a clamshell type container illustrating how the container members (i.e. the tray 401 and the lid 402) may be accommodated relative to one another in a manufacturing mould used in a manufacturing process as described e.g. in prior art document WO 2006/057610.
  • a product (i.e. container 400) of clamshell type can be manufactured using a mould which during production accommodates both the tray 401 and the lid 402 in one plane, however which is designed to accommodate the tray 401 and the lid 402 respectively such that an angle ⁇ is created between the tray and the lid, where such an angle ⁇ is larger than 180°.
  • the angle ⁇ between the tray and the lid is around 190°, however the skilled person understands that angles larger than 180 are also possible, where increasing angle will lead to sharper negative angles at the corresponding outer peripheral rim 419d of the lid 402.
  • the locking mechanism includes locking means along a major part of the periphery of the locked packaging container; in the first embodiment in fact around the whole circumference of the container, and in the second, third and fourth embodiments along more than half of the circumference.
  • This promotes an efficient locking, and sealing efficiency, but also locking mechanisms of the type described, or other locking mechanisms within the scope of the patent claims, which have a shorter total length of extension along the periphery of the packaging container, e.g. a number of separate locking members distributed around the periphery, can be considered.
  • the locking means along the side walls 217, 218 provides a guiding function in addition to the locking function, meaning that the sections of the rim 209 of the tray 201 and of the rim 219 of the lid 202 upon closing of a clamshell container will cooperate for guiding the tray and the lid into a rightful, sealing position as closing operation advances.
  • a friction locking is achieved very early when initiating closing operation, i.e.
  • the packaging container need not have four corners. More as well as fewer corners may very well be conceived.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

L'invention concerne un récipient d'emballage (100, 200, 300) constitué essentiellement d'un matériau en fibres cellulosiques obtenu à partir de pâtes, et comprenant un plateau et un couvercle. Dans le mécanisme de verrouillage de ce récipient, une partie du plateau ou du couvercle est un élément mâle (124, 224, 324, 424) et une partie du plateau ou du couvercle restant est un élément femelle (126, 226, 326, 426). L'élément mâle comporte une première surface (120', 121') et l'élément femelle comporte une deuxième surface (104b', 105b'), lesdites surfaces venant en contact mutuel dans le récipient fermé et comportant une extension sur au moins une partie de la circonférence du récipient. Le mécanisme de verrouillage répond à au moins une des conditions suivantes : a) l'intersection entre I : les lignes d'intersection entre les première et deuxième surfaces de matériau en fibres et un premier plan vertical qui est un plan radial et II : un plan vertical perpendiculaire au premier plan vertical, forme un angle de bec (β), ce qui entraîne la venue en contact mutuel des surfaces de matériau en fibres des éléments mâle et femelle dans un mode d'emboîtement; et b) la résistance de frottement entre les surfaces des éléments mâle et femelle dans leur position de fermeture est accrue par une force de rappel et une force normale développées entre les deux éléments pendant l'opération de fermeture.
EP11803912.2A 2010-07-08 2011-07-08 Récipient d'emballage Withdrawn EP2590866A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1050765 2010-07-08
PCT/SE2011/050933 WO2012005683A1 (fr) 2010-07-08 2011-07-08 Récipient d'emballage

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EP2590866A1 true EP2590866A1 (fr) 2013-05-15

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CN (1) CN103328335A (fr)
WO (1) WO2012005683A1 (fr)

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CN103328335A (zh) 2013-09-25

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