Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B70/00—Making flexible containers, e.g. envelopes or bags
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/26—Folding sheets, blanks or webs
  • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
  • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
  • B31B2100/0024—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed having all side walls attached to the bottom
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2110/00—Shape of rigid or semi-rigid containers
  • B31B2110/10—Shape of rigid or semi-rigid containers having a cross section of varying size or shape, e.g. conical or pyramidal
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2110/00—Shape of rigid or semi-rigid containers
  • B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
  • B31B2110/35—Shape of rigid or semi-rigid containers having a polygonal cross section rectangular, e.g. square
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2120/00—Construction of rigid or semi-rigid containers
  • B31B2120/10—Construction of rigid or semi-rigid containers provided with covers, e.g. lids
  • B31B2120/102—Construction of rigid or semi-rigid containers provided with covers, e.g. lids with a hinged cover
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2120/00—Construction of rigid or semi-rigid containers
  • B31B2120/70—Construction of rigid or semi-rigid containers having corrugated or pleated walls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2160/00—Shape of flexible containers
  • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2247/00—Manual operations for making bags or boxes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/60—Uniting opposed surfaces or edges; Taping
  • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
  • B31B50/624—Applying glue on blanks
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
  • B31B50/74—Auxiliary operations
  • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings

Definitions

• a method for producing a trough-shaped package and means for carrying out the method concerns a method for producing a trough-shaped box by erecting a flat box blank consisting of cardboard, pasteboard, or the like and sealing the blank for producing said box.
• Prior art methods of the above mentioned kind comprises employing of several steps and production of the box in several batches.
• a method is known from US-A- 3,236,159.
• the erection of the trough takes place in several complicated steps.
• a first preparatory step is made by folding short side walls of a blank over the trough bottom and fixing by gluing in its ends against the respective long side walls.
• a manual erection takes place of the mentioned folded down short side walls.
• the fixing take place of the portions of the trough side walls which are provided with cold glue.
• This third step may either oe made manually by in turn performing a manual compressing of tne four corners of the trough, alternatively by machine in that said last mentioned compression is made in a machine related press tool.
• the main object with the present invention is therefore primarily to find a method which is environmentally friendly and energy saving and which among other things solves the above discussed inconveniences and instead makes it possible to produce a box in a single operational step, in which both erection of the blank as well as gluing and sealing of the blank in the erected position may be made in a single operational step.
• Said object is achieved by means of a method according to the present invention, which is primarily characterized in that the blank is erected and sealed in a common phase after first having applied cold seal glue, i.e. a pressure sensitive, self-adhesive cold seal glue in a printing section for the box material, so that afterwards only folding and compression of the provided blank is needed for producing the box and sealing the blank in the desired erected box state.
• cold seal glue i.e. a pressure sensitive, self-adhesive cold seal glue
• a further object of the invention is to provide means that are suitable to be used during realisation of a method for producing a trough-shaped box by erecting and sealing a flat box blank consisting of cardboard, pasteboard or the like, and sealing the blank for producing said box, especially when producing a trough in particular for foodstuffs and where the blank will be provided with folding lines for delimitation of on one hand a trough bottom, on the other a number of from this upwards folding trough side wall parts, wherein the blank is provided with additional folding lines in the trough side wall parts in order to allow adjoining portions of the trough side wall parts to be folded against each other to a double folded position.
• the gluing apparatus is provided with glue applicators which apply e.g. a 4 -point box. Gluing with Coldseal results in that only folding and compression is needed in the machine. The application of glue is eliminated.
• the gluing takes place in erection machines at the customer which is then made by means of hook locking, cold glue or heat sealing.
• the new method for cardboard boxes makes it possible to apply the glue during printing, production is rationalised.
• manual locking and forming like for example could be mentioned pizza boxes, forming is realised by means of hook locking.
• this type of box may be simplified and material may be saved because flaps may be made smaller. Also the box will be more rigid.
• the application of the cold seal may preferably be performed in different types of printing presses like especially intaglio but also in modern offset presses with IR- drier etc.
• the invention is described in more detail in the following, wherein an embodiment is exemplified with reference to the accompanying drawings in which,
• Fig 1 is a view from below of a blank, which may be used in the method in accordance with the invention
• ' Fig 2 is a perspective view of the blank according to
• Fig 3 is a view from above of the trough shown in Fig 2 in folded condition
• Fig 4 shows a method according to the invention for erecting a blank of the type shown in Fig 1, and
• Fig 5 and 6 are views from above of two different types of lids for a trough.
• Fig 1 shows a flat blank 1 of cardboard provided with the desired folding lines, that is four first folding lines 2 for delimitation of on one hand a trough bottom 3, on the other four from this upwards foldable trough side wall portions, which later exhibit long side walls 4 and short side walls 5, other folding lines 6, 7 and 8 for forming double folded trough side wall parts of the blank, which enables erection of the long side walls 4 and the short side walls 5, third folding lines 9 and 10 for enabling folding out an edge flange, so called edging, 11 and 12 respectively along the long side walls and the short side walls respectively.
• Fourth folding lines 13 are arranged in order to allow folding the trough together from an erected position.
• the blank 1 is shown in Fig 1 from the "underside” i.e. that side which will form the outside of the erected trough.
• the other folding lines 6, 7 and' 8 form together a fold, web-corner, at each corner of the trough, wherein the folding lines between them form two mutually equally large portions 14a and 15a (respectively 14b, 15b respectively 14c, 15c respectively 14d, 15d) of the blank, which are intended to be folded outward from the trough during erection of the blank, in towards each other and in towards an appurtenant, adjacent zone 16 on the respective wall part 4, so that the blank 100 forms a completed erected and formed trough la according to Fig 2. Also another folding method is enabled.
• a portion of the edging 11 is in Fig 2, for pedagogical reasons cut away, in order to show how two such portions 14a and 15a are folded together against each other, with the portion 14a being in contact ⁇ almost hidden in Fig 2) against the respective zone 16 (completely hidden in Fig 2) at the respective wall part 4.
• the described blank is in itself previously known from
• EP-A-0178730 According to the prior art technique, the portions 14 and 15 and the wall part zone 16 are attached against each other by means of heat sealing, so that the trough la is fixed in the erected position.
• the in Fig 2 erected and ready trough may if necessary be folded together to a flat state la', see Fig 3, and is transported to the client which is going to box the trough.
• the technique for erecting the trough is simplified in that the trough manufacturer instead of performing the three steps according to Fig 1, 2 and 3 only has to perform step 1 according to Fig 1.
• the trough manufacturer may send the blank in unfolded form, see Fig 1, to the customer that then oneself both erects, forms and glues ⁇ the trough in a single step. I.e. that the customer then itself without heat sealing and hot melt glue only by pressing together the web-corners both erects, forms and glues the trough in a single step, see Fig 4.
• the blank 100 shown in Fig 4 has in the disclosed embodiment exactly the same shape and folding lines of the same kind as the blank 1 in Fig 1.
• the trough manufacturer in Fig 4 has provided the outside of the portions 14a-d and the corresponding surface of the wall part zones 16 with a coating of a pressure sensitive, self-adhesive cold sealing glue, cold seal.
• This coating is supplied in the same production step where printing of the blank decoration takes place, wherein special plates of BASF LW-material are used, which enable handling of cold seal without adhering without interference with production.
• cold glue i.e. cold seal glue
• US-A-3 , 236 , 159 Another such a cold-glue might be a water based cold sealing glue acrylate and natural rubber, which is used under the trademark KOLD-LOK for cold sealing of boxes of plastic film, aluminium foil and metallized film for foodstuff and confectionery products.
• Said glue types has the quality that two glue surfaces of the blank immediately adheres against each other, if they come into contact with each other under a certain compression. On the other hand, no adherence occur if such a glue surface of the blank does not come into contact with an unglued surface of the blank. This implies that several such glued blanks 100 may be stacked onto each other during transport without adhering to each other, if the blanks are turned towards the same direction, because the two glue surfaces 14a-d and 16 are positioned on the same side which shall form the outside of the trough.
• a blank 100 mounted in accordance with the shown embodiment between two form pressing parts, which are composed of on one hand a female part 17 which is composed of a first, stiff metal form, and which has an internal form face corresponding to the desired external shape of the trough, on the other by a male part 18 which is adapted to the internal form face of the female part, which male part is composed of a second, stiff metal form which may be sunk downwards into the female part 17.
• the blank 100 By pressing down the male part 18 into the female part 17, the blank 100 is forced to adapt itself to the internal form face of the female part 17, i.e. fold itself along the folding lines 2 and 6 - 8 , so that the portions 14 and 15 are forced out behind the respective wall part zone 16, and forming a fold, which is pinched between the female part and the male part 18, so that the portions 14a-d are pressed with pressure against the respective wall part zone 16, so that the glue surface on the portion 14a-d adheres to the glue surface at the respective wall part zone 16.
• a handle 19 which is rigidly connected to the male part 18.
• Both the erection of the blank and the gluing of this blank thus is performed in one and the same step, and without any supply of heating energy.
• the male part 18 is provided with a peripheral, somewhat downwards sloping edge flange 20, which causes the edge flanges 11 and 12 of the trough to be forced to fold outwards and somewhat downwards, so that the fibres of the material are broken when the male part 18 presses the blank 100 into the female part 17.
• the female part 17 and the male part 18 together form a sort of form pressing tool, which in one single step both erects the blank 100 to a trough shape and fixes the tray in erected position by means of the forced gluing of the portions 14 and the wall part zone 16 against each other.
• the ready trough gets according to the invention the same appearance as the trough la according to Fig. 2.
• a suitable lid e.g. a lid 21 according to Fig 5, which composes a part which is continuous with the blank 100.
• the outside is instead glued on to the two portions 14a-d and 15a-d, so that the two portions of said folds adhere to each other.
• no gluing is needed of the inside of the wall part zone which the fold 14, 15 is supposed to abut. This depends upon the intrinsic elasticity of the cardboard blank which is achieved if the folding lines 6 are formed as so called scribed lines and the folding lines 7 and 8 as so called crease. Also in this case, all glue surfaces lie on the "outside" of the blank, i.e. that side of the blank which shall form the outside of the trough.
• the folds 14, 15 shall be forced outwards by the male part 18, and thus be pressed towards the outside of the wall part zone 16, or be forced inwards against the inside of the wall part zone 16, is decided beforehand by the trough manufacturer if this during manufacturing of the folding lines 6-8 render these a certain pre-oriented folding crease, so that the folding line 7 with certainty will move in the desired direction during the movement of the male part 18 into the female part 17.
• the above mentioned type of cold seal glue may also be used for sealing the lid 21 and 22 respectively against the trough, see Fig 5 and 6.
• the lid 21 and 22 respectively are for this object provided with edge flanges 23-24 and 23 '-24' respectively, one side of which is coated with said glue.
• a corresponding glue coating is also present at the under side of the trough blank edge flanges 11-12.
• the lid may be provided with a perforation, (not shown) , which makes it possible for a segment of the lid to be torn off to expose the contents of the trough.
• the method may be performed with the parts turned in the opposite direction than the shown and described according to the above and also in the opposite order.
• a primer of a prior art type may be supplied to the blank whereby better results may be achieved and that tolerance towards how each work operation is performed like achieving sufficient compression.

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• Making Paper Articles (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20403684

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (1)

Citations (1)

Family Cites Families (4)

• 1996
  • 1996-08-29 SE SE9603121A patent/SE509463C3/sv unknown
• 1997
  • 1997-08-28 WO PCT/SE1997/001436 patent/WO1998008671A1/en not_active Application Discontinuation
  • 1997-08-28 EP EP97937929A patent/EP1007341A1/de not_active Withdrawn
  • 1997-08-28 AU AU40375/97A patent/AU4037597A/en not_active Abandoned
• 1999
  • 1999-02-19 NO NO990780A patent/NO990780L/no unknown

Patent Citations (1)

Non-Patent Citations (1)

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