SE433338B

SE433338B - FORPACKNINGSTRAG

Info

Publication number: SE433338B
Application number: SE8004041A
Authority: SE
Inventors: H R I Linner
Original assignee: Akerlund & Rausing Ab
Priority date: 1980-05-30
Filing date: 1980-05-30
Publication date: 1984-05-21
Also published as: GB2076783B; GB2076783A; SE8004041L

Description

48004041-3 2 För att närmare be1ysa uppfinningsföremå1et kommer nu en beskrivning av nâgra utföringsformer att göras med hänvisning ti11 bifogade ritningar, där fig. 1 visar två varianter av ämnen ti11 trâg, den ena visad med he1dragna 1injer och avseende en_dubbe1sidigt be1agt variant, den andra antydd genom förekomsten av utskärningar vid hörnområdena (visade med streckade 1injer) och avseende ett enke1sidigt beïagt trâg, fig. 2 visar ytter1igare en hörnvarhnt i form av en de1vy av ett ämne, fig. 3 visar hörnet i fig. 2 i rest ti11stånd och sett från insidan av tråget, och fig. 4 visar samma hörn som i fig. 3 fast sett från utsidan av tråget. Ämnet omfattar a11tsâ ett bottenfä1t 10, motstâende sidoväggsfä1t _11, motstående ändväggsfä1t 12, ett par fogf1ikar 13, 14 me11an inti11iggande sido- väggs-, ändväggsfä1t, samt sidoväggsf1änsar 15 och ändväggsf1änsar 16. In order to further elucidate the object of the invention, a description of some embodiments will now be made with reference to the accompanying drawings, in which Fig. 1 shows two variants of blanks for trays, one shown with solid lines and with respect to a double-sided coated variant, the other indicated by the presence of cut-outs at the corner areas (shown in broken lines) and with respect to a single-sided curved trough, Fig. 2 further shows a corner corner in the form of a section of a blank, Fig. 3 shows the corner in Fig. 2 in the rest condition and seen from the inside of the trough, and Fig. 4 shows the same corner as in Fig. 3 fixed seen from the outside of the trough. The blank comprises a bottom wall 10, opposite side wall brackets 11, opposite end wall brackets 12, a pair of joints 13, 14 between adjacent side wall, end wall brackets, and side wall fins 15 and end wall fins 16.

I den "he1dragna" utföringsformen i fig. 1 är ämnet dubbe1sidigt be1agt, företrädesvis med PETP e11er PBTP. Med de streckade 1injerna 17 i fig. 1 antydes en enke1sidigt be1agd variant (be1agd på den sida som sedermera bi1dar trågets insida; vi1ket svarar mot den uppâtvända sidan i fig. 2), medan motsvarande streckade 1injer 17 i fig. 2 avser ett dubbelsidigt be1agt ämne.In the "solid" embodiment of Fig. 1, the blank is double-sided coated, preferably with PETP or PBTP. The dashed lines 17 in Fig. 1 indicate a single-sided coated variant (coated on the side which later forms the inside of the trough; which corresponds to the upturned side in Fig. 2), while the corresponding dashed lines 17 in Fig. 2 refer to a double-sided coated subject.

För att nu resa ämnet ti11 ett färdigt tråg ti11vägagås Tämpïigen på så sätt att med het1uftssprutor aktiveras be1äggningen ti11 förseg1ingsbart ti11stând, a11tså en temperatur inom mjukgörningstemperaturinterva11et, i de skuggade områdena, varefter ämnet pressas genom ett resningsschakt av konventione11t s1ag med mot ämnet svarande tvärsnitt och vikningsdon för fog- f1ikar och kantf1änsar. 7 Det är härvid att märka, att fogf1ikarna 13, 14 har givits sådan höjd att de b1ir direkt p1acerbara mot utsidan av ändväggen 12 utan att ge någon dubb1ering e11er trefa1digande av materia1tjock1eken hos ändväggﬂänsen 16. Fogf1ikarna har a11tså en höjd maxima1t 1ika med sidoväggs- och ändväggshöjden. Vikningen av fogf1ikarna sker kring big1injer 18, 19, 20,.och f1iken 14 kan härvid betraktas som den inre, medan f1iken 13 bi1dar den yttre f1iken hos det färdiga de1ta- hörnet. W I resningsverktyget vikes även sidoväggsf1änsen 15 och ändväggsf1änsen 16 ut ti11 mer e11er mindre horisonte11 position kring big1injer 21, 22. I detta sammanhang ska11 det observeras att bigarna 21, 20 respektive 18, 22 är så utförda, att me11an respektive kantf1äns 15, 16 och ti11hörande fogfä1tde1 13, 14 det uppstår vad man kan ka11a förbinde1separtier 23, 24. Trågets egent1iga hörn, åtminstone inifrån sett och ur1ockets synpunkt betraktat, uppkommer där korsningspunkterna me11an big1injerna 20, 21 och 18,.22 "sammanfa11er“ hos det resta trâget. Detta har ti11 fö1jd att nämnda förbinde1separtier, som a11tsâ inifrån trâget sett, 1igger utanför de egent1iga hörnen effektivt vänder de fria snittytorna i hörnområdena utåt. Detta förhâ11ande framhå11es 8004041-3 ytteriigare om förbindeisepartiets 14 kantfiäns 16 ges en big 25 sträckande sig från korsningspunkten mellan bigarna 18, 22 tili den öppna snittytan hos flänsen 16/förbindeisepartiet 24.In order to now raise the blank to a finished trough, it is tamped in such a way that with hot air sprayers the coating is activated to a sealable condition, i.e. a temperature within the softening temperature range, in the shaded areas, after which the blank is pressed through a rising shaft. for joints and edge fins. It is to be noted here that the joints 13, 14 have been given such a height that they can be placed directly towards the outside of the end wall 12 without giving any doubling or tripling of the material thickness of the end wall end 16. The joints also have a height with maximum side wall 1 end wall height. The folding of the joint sheets takes place around large lines 18, 19, 20, and the sheet 14 can in this case be regarded as the inner one, while the sheet 13 forms the outer sheet of the finished part corner. In the erection tool, the side wall flange 15 and the end wall flange 16 are also folded out to a more or less horizontal position around bead lines 21, 22. In this context, it should be noted that the bends 21, 20 and 18, 22, respectively, are designed so that joint, 13, 14 there arises what can be called connecting sections 23, 24. The actual corners of the trough, at least seen from the inside and viewed from the point of view, arise where the intersection points between the big lines 20, 21 and 18, .22 "coincide" with the raised trough. This means that said connecting portions, which are seen from the inside of the trough, effectively outside the actual corners, effectively turn the free cut surfaces in the corner areas outwards. This relationship is further emphasized if the edge portion 16 of the connecting portion 14 is given a big 25 extending from the intersection point. 22 to the open cut surface of the flange 16 / connecting portion 24.

Den ringa utsträckning av materiaïdubbiering hos fiänsen 16 som omvikningen kring bigen 25 ger är försummbar ur ïockförsegiingssynpunkt, med hänsyn till jämnt fördeiad värmegenomgång. Eventueiia bidrag åt det negativa håiiet kompenseras av de fördelar utåtvända snittytor ger._The small extent of material dubbing of the flange 16 provided by the fold around the trough 25 is negligible from the point of view of sealing, with regard to evenly distributed heat transfer. Any contribution to the negative height is offset by the benefits of outward-facing cut surfaces.

Claims

8004041-3

1. PATENT REQUIREMENTS: _1. Packaging trays of single-sided or double-sided plastic-coated cardboard or the like, comprising a bottom liner (10) with contiguous, opposite pairs of side-wall lugs (11) and end-wall lugs (14) connected therewith via bending lines or 11, which are via, and an edge flange (15, 16) extending around the upper edge of the trough, with side wall and end wall brackets, the joint brackets (13, 14) having a maximum height equal to the side wall and end wall height, characterized in that all the joint joints are connected. associated edge fins of the side and end wall brackets via connecting portions (23, 24) which are considerably narrower than the edge fence width and which have open cut surfaces facing outwards.

Trough according to claim 1, wherein the joints (13, 14) are intended to form external part corners, characterized in that at least one part of the connecting portion (24) of the inner joint member (14) at each corner of the trough is folded. under the flange (16) and thereby turns its free cutting surface outwards.

Trough according to claim 2, characterized in that the folding of the connecting portion is performed around a bead line (25) or correspondingly extending from the point of intersection between the bead line (22) of the edge flange and the bending line (18) of the joint therefrom out to the connecting portion / the free cut surface of the edge f1.

4. A tray according to claim 3, characterized in that the outer joint (13) at each corner has an intersection point between big lines (20, 21) corresponding to said intersection point, and that this further intersection point is also at a distance from the associated connecting part free edge surface (23, 15) of free cutting surface, said two intersecting points substantially coinciding and said further connecting portion (23) being located below the former and also facing its free cutting surface outwards.