Tray, assembly of cardboard blanks, and device and method for forming such a tray
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65D-005/28
B65D-005/32
B31B-001/14
B31B-001/44
B65D-005/00
출원번호
US-0257319
(2010-03-22)
등록번호
US-8939352
(2015-01-27)
우선권정보
FR-09 01304 (2009-03-20)
국제출원번호
PCT/FR2010/000241
(2010-03-22)
§371/§102 date
20111111
(20111111)
국제공개번호
WO2010/106255
(2010-09-23)
발명자
/ 주소
Delause, Bernard
Mathieu, Gerard
Desertot, Didier
출원인 / 주소
Otor
대리인 / 주소
Banner & Witcoff, Ltd.
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
The invention relates to a cardboard tray made of three parts, to an assembly of blanks, and to a device and method for producing such a tray. The tray comprises a first part defining a bottom connected by first fold lines to two first opposite sidewalls and two second parts defining second opposite
The invention relates to a cardboard tray made of three parts, to an assembly of blanks, and to a device and method for producing such a tray. The tray comprises a first part defining a bottom connected by first fold lines to two first opposite sidewalls and two second parts defining second opposite sidewalls, each comprising at least one longitudinal first flap connected to said second wall by a second fold line and glued on the bottom, and two sets of transverse flaps, each comprising at least one transverse flap glued to a first corresponding opposite side wall, respectively.
대표청구항▼
1. A tray made of cardboard sheet material, formed of three separate parts, namely a first part forming a bottom having an external face connected by first fold lines to two first opposite side walls, each first side wall having an inner face, and two second parts forming two second opposite side wa
1. A tray made of cardboard sheet material, formed of three separate parts, namely a first part forming a bottom having an external face connected by first fold lines to two first opposite side walls, each first side wall having an inner face, and two second parts forming two second opposite side walls each comprising at least one first longitudinal flap connected to said second wall by a second fold line and bonded to the external face of the bottom and two sets of transverse flaps each comprising at least one transverse flap respectively bonded to a corresponding first side wall facing it, wherein each set of transverse flaps comprises a first transverse flap connected to the corresponding second side wall by a third fold line and bonded to the inner face of the adjacent first side wall, and wherein the side ends of the first longitudinal flaps bonded to the external face of the bottom of the tray are of a shape to match an upper surface of the tray or second longitudinal flap(s), in order to allow one to fit into the other when two trays are stacked on one another. 2. The tray as claimed in claim 1, wherein each set of transverse flaps comprises a second transverse flap connected by a fourth fold line to said first transverse flap to form a corner of the tray, said second transverse flaps each being connected by a fifth fold line to a third transverse flap interacting with the inner face of the second walls facing them. 3. The tray as claimed in claim 1, wherein the basis weight of the cardboard of the bottom and of the two first side walls is different from that of the two second side walls. 4. The tray as claimed in claim 1, wherein the corrugations of the first walls and of the second walls are perpendicular to the bottom of said tray. 5. The tray as claimed in claim 1, wherein each second wall also comprises at least one second longitudinal flap connected to said second wall by a sixth fold line on the side opposite to the first longitudinal flap. 6. The tray as claimed in claim 5, wherein said second longitudinal flap itself comprises at least one end tongue that is folded down. 7. The tray as claimed in claim 6, wherein each second wall comprises a single longitudinal flap furnished on either side with an end tongue that is folded down and bonded to the outer face of the first flap or of the first side wall facing it, said single longitudinal flap forming a transverse protruding element on two opposite ends of said tray. 8. The tray as claimed in claim 6, wherein each second wall comprises two longitudinal end flaps each furnished with one of said end tongues that is folded down, forming consolidation lugs to the four opposite ends of said tray. 9. The tray as claimed in claim 5, wherein each first transverse flap also comprises at least one side tongue that is folded down and bonded to a one-piece longitudinal flap forming a protruding element. 10. The tray as claimed in claim 5, wherein the side ends of the first longitudinal flaps bonded to the external face of the bottom of the tray are of a shape to match a surface of the second longitudinal flap(s), in order to allow one to fit into the other when two trays are stacked on one another. 11. The tray as claimed in claim 1, wherein each second wall comprises a central fold in an isosceles triangular and two first longitudinal flaps situated on either side of said central fold. 12. The tray as claimed in claim 1, the tray comprises eight sides. 13. The tray as claimed in claim 1, wherein the third fold lines are at an angle relative to the perpendicular to the first fold lines so as to give a frustoconical shape to said tray. 14. The tray as claimed in claim 1, wherein at least one first side wall comprises fifth flaps connected on either side of said first wall by sixth fold lines capable of interacting with the outer face of an adjacent transverse flap. 15. The tray as claimed in claim 1, wherein the second walls are higher than the adjacent first side walls. 16. The tray as claimed in claim 1, wherein it comprises a first side wall that is pierced with holes partially or over the whole of its length or furnished with a longitudinal tear-off strip. 17. A set of blanks to form a tray made of cardboard sheet material, wherein it comprises a first blank formed of a bottom having an external face connected by first fold lines to two first opposite side walls, each first side wall having an inner face, and at least a second blank capable of forming at least one of two second opposite side walls of said tray that are identical and symmetrical relative to a line of separation, each second side wall each comprising at least a first longitudinal flap connected on one side to a corresponding second wall by a second fold line and on the other side by said line of separation to the outer periphery of the other first longitudinal flap of the other second symmetrical side wall facing it, said first longitudinal flaps being arranged to be bonded to the external face of the bottom, the second fold line being offset to allow compensation of a thickness of corrugated board when the tray is formed, the side ends of the first longitudinal flaps bonded to the external face of the bottom of the tray are of a shape to match an upper surface of the tray or second longitudinal flap(s) in order to allow one to fit into the other when two trays are stacked on one another, and each second wall also comprising two sets of transverse flaps, said sets of transverse flaps each comprising at least one transverse flap suitable for being respectively bonded to a corresponding first side wall facing it when the tray is formed and wherein each set of transverse flaps comprises a first transverse flap connected to the corresponding second side wall by a third fold line and is capable of being bonded to the inner face of the adjacent first side wall. 18. The set of blanks as claimed in claim 17, wherein each set of transverse flaps comprises a second transverse flap connected by a fourth fold line to said first transverse flap to form a corner of the tray, said second transverse flaps themselves each being connected by a fifth fold line to a third transverse flap to interact with the inner face of the second walls facing them. 19. The set of blanks as claimed in claim 17, wherein each second wall also comprises at least one second longitudinal flap connected to said second wall by a sixth fold line on the side opposite to the first longitudinal flap. 20. The set of blanks as claimed in claim 17, wherein each second wall comprises a central fold in an isosceles triangular shape and two first longitudinal flaps situated on either side of said central fold. 21. The set of blanks as claimed in claim 17, wherein the third fold lines are at an angle relative to the perpendicular to the first fold lines, so as to give a frustoconical shape to said tray once formed. 22. A device for forming a tray from two blanks of cardboard sheet material or corrugated cardboard, namely a first blank formed of a bottom connected by first fold lines to two first opposite side walls and a second blank capable of forming two second opposite side walls of said tray, that are identical and symmetrical relative to a line of separation, each second side wall comprising at least one first longitudinal flap connected on one side to a corresponding second wall by a second fold line and on the other side by the said line of separation to the outer periphery of the other first longitudinal flap of the second symmetrical side wall facing it, the side ends of the first longitudinal flaps being of a shape to match an upper surface, once formed, of the tray or second longitudinal flap(s), in order to allow one to fit into the other when two trays are stacked on one another, and two sets of transverse flaps each comprising at least one transverse flap, wherein the device comprisestwo storage magazines for storing respectively the first and second blanks,means for cutting the second blank at the line of separation to form the two second opposite side walls,means for picking up and transferring the first blank from the storage magazine to an assembly station,means for firmly positioning the first blank in abutment in order to give it an exact reference position,means for picking up and transferring laterally by suction cups the second walls in order to place them on the first blank cut-out thus indexed,means for pasting the first longitudinal flaps and the inner face of the second walls and/or of the sets of second flaps during their transfer,means for pressing the first longitudinal flaps on the external face of the bottom of first blank,means for folding the sets of flaps toward the second walls,means for transferring the set of blanks thus constituted to a forming station, and forming means at said forming station for pressing the sets of transverse flaps on the corresponding inner face of the second walls such as the side ends of the first longitudinal flaps are of a shape to match the upper surface of the tray or the second longitudinal flap(s) in order to allow one to fit into the other when two trays are stacked on one another. 23. The device as claimed in claim 22, wherein the forming means comprise a mandrill and means for winding the set of blanks around said mandrill in order to form the tray. 24. The device as claimed in claim 22, wherein each set of transverse flaps comprises a first transverse flap connected to the corresponding second side wall by a third fold line and a second transverse flap connected by a fourth fold line to said first transverse flap, said second transverse flaps each being themselves connected by a fifth fold line to a third transverse flap, the means for folding said sets comprise pins for forming a corner of the tray and pushing means for pressing said third transverse flaps onto the inner face of the second walls facing them. 25. The device as claimed in claim 23, wherein each second wall also comprises at least one second longitudinal flap connected to said second wall by a sixth fold line on the side opposite to the first longitudinal flap, and wherein the device also comprises means for folding said second longitudinal flap to form at least two lugs or two protruding elements on either side of the tray, and in that the mandrill can be retracted between a position of forming the tray and a position of escapement from the lugs or protruding elements. 26. The device as claimed in claim 23, wherein each second wall comprises three central fold lines parallel to the third fold lines and two first longitudinal flaps situated on either side of said central fold, and wherein the device comprises means for folding said three lines to form in the middle of said second walls a central fold in an isosceles triangular shape. 27. A method for forming a tray from two blanks of cardboard sheet material or corrugated cardboard, namely a first blank formed of a bottom connected by first fold lines to two first opposite side walls and a second blank capable of forming two second opposite side walls of said tray, identical and symmetrical relative to a line of separation, each second side wall each comprising at least one first longitudinal flap connected on one side to a corresponding second wall by a second fold line and on the other side by said line of separation to the outer periphery of the other first longitudinal flap of the second symmetrical side wall facing it, the side ends of the first longitudinal flaps bonded to the external face of the bottom of the tray are of a shape to match an upper surface of the tray or second longitudinal flap(s) in order to allow one to fit into the other when two trays are stacked on one another, and two sets of transverse flaps each comprising at least one transverse flap, wherein, after cutting the second blank at the line of separation to form the two second opposite side walls,the first blank is transferred to an assembly station,the first blank is firmly positioned in abutment in order to give it an exact reference position,the second walls are transferred laterally by suction cups while pasting the first longitudinal flaps and the inner face of the second walls and/or the sets of second flaps during their transfers,then they are placed on the first blank cut-out thus indexed,the first longitudinal flaps are pressed onto the external face of the bottom of the first blank,the sets of flaps are folded toward the second walls,and the set of blanks thus constituted is transferred to a forming station to form the tray said forming involving the step of pressing the sets of transverse flaps on the corresponding inner face of the second walls. 28. The method as claimed in claim 27, wherein each set of transverse flaps comprising a first transverse flap connected to the corresponding second side wall by a third fold line and a second transverse flap connected by a fourth fold line to said first transverse flap, said second transverse flaps each being themselves connected by a fifth fold line to a third transverse flap, said sets are folded around pins to form a corner of the tray and said third transverse flaps are pressed onto the inner face of the second walls facing them. 29. The forming method as claimed in claim 27, wherein the tray is formed around a mandrill. 30. The method as claimed in claim 29, wherein each second wall also comprising at least one second longitudinal flap connected to said second wall by a sixth fold line on the side opposite to the first longitudinal flap, said at least one second longitudinal flap is folded to form at least two lugs or two protruding elements on either side of the tray, and the mandrill is retracted between a position for forming the tray and a position of escapement from the lugs or protruding elements. 31. The method as claimed in claim 27, wherein each second wall comprising three lines of central folds parallel to the third fold lines and two first longitudinal flaps situated on either side of said central fold, said three fold lines are folded to form, in the middle of said second walls, a central fold in an isosceles triangular shape.
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