CN1541173A

CN1541173A - Sideseam Joint for carton

Info

Publication number: CN1541173A
Application number: CNA028158229A
Authority: CN
Inventors: R��A��С�ص¸��; R·A·小特德福德
Original assignee: Nevamar Corp
Current assignee: Weilv Packaging International Co ltd
Priority date: 2001-08-14
Filing date: 2002-08-13
Publication date: 2004-10-27
Anticipated expiration: 2022-08-13
Also published as: TW577845B; KR20040036707A; EP1417131B1; EP1595804A3; ES2247369T3; WO2003016152A1; US20050056689A1; EP1417131A1; DE60205261T2; ATE300477T1; CN1258464C; US20030034385A1; JP2005500206A; DE60205261D1; EP1595804A2

Abstract

According to the practice of this invention, the noted unwanted adhesion between the second panel (14) and the first panel (12) attendant the formation of the sideseam joint (40) is eliminated by providing the second panel (14) with a cutout (134). That portion which is cut out corresponds in form to the triangular cutout or truncated portion at the tapered end (28) of the sideseam forming fifth panel (20). In this way, when compression of the first panel against the sideseam panel and the first panel occurs (12), there is no hot and sticky exposed area (32) of the first panel (12) which will adhere to the second panel (14).

Description

The latasuture of box engages

Technical field

The present invention relates to a kind of for example cardboard packaging of milk and fruit juice of packing liquid that usually is used for.This container is become sample and is formed herringbone top flexible package punch by an entire paper slab, and the inside and outside profiled surface of paperboard blank scribbles one or more layers barrier material usually, and on automation, be subjected to cutting, indentation, setting and filling.As you know, this container has a flat bottom and herringbone top or roof portion, is fit to form a pour spout when latter opens.An intermediate steps making this container is to form a tubular structure by blank, and also has the formation of sealed end and the step of filling liquid after socket forms.

Background technology

In have the process that the slab that forms a plurality of wallboards that panel is set in proper order forms gable top container by one whole, it is to form socket by folded blank that a step is arranged, and makes the 5th panel or latasuture shaping panel overlap on the marginal belt of free edge portion of the first side wall shaping panel.A part of surface that the cassette interior of first panel is shaped is heated, the polyethylene coating that adopts usually with partial melting, and it is clamminess.Equally, also to heating, so that its polyethylene coating is clamminess with the 5th panel or the latasuture panel that the free border area of first panel has the surface to contact.Be shallow rhombus basically through folding slab lateral cross structure now, two panels apply a power rhumbatron are caved in the above, cause the power that is applied to latasuture plate or panel that it is sealed to the border area of first panel.

Usually, be to cut process and latasuture is cut cut, and these specific cutting are cut process and can be caused a taper at the be shaped end that is positioned at the box back cover of panel or the 5th panel of latasuture inevitably with specific cutting.This tapering part causes local triangle's expose portion in the first panel border area, therefore push when pushing first and fourth face plate downwards and with latasuture (the 5th) panel and when being sealed to the border area of second panel, heat and the gable that is clamminess that the part of second panel can expose with of first panel contacts, and make first panel, disadvantageous bonding near formation between the gable of the gable of latasuture panel conical end and second panel.For fear of this disadvantageous bonding, reduce the first panel border area temperature be heated and the 5th or the latasuture panel temperature, to reduce bonding.Though solve above-mentioned unfavorable bonding problem, this reduction method of temperature can weaken sealing intensity and the airtight quality between the latasuture panel and first panel.Along with the liquid box is preserved life-time dilatation, it is unacceptable that this quality reduces.

Description of drawings

Fig. 1 is the planar view that is used for forming an existing entire paper slab of herringbone top liquid box.

Fig. 2 is a fragmentary, perspective view, illustrates by one whole slab that is cut and delineate for the production gable top container and forms the step of the typical prior art of seam socket, and disadvantageous bonding how the generation is shown.For convenience of description and explain that the second and the 3rd sidewall panel is shown as a position that is positioned on the first and the 4th sidewall panel.In fact, these relative positions are put upside down, and

plate

16 and 14 is near coplane.

Fig. 3 is one whole planar view that is provided with the cardboard slab of otch on first panel.

Fig. 4 is and the similar view of Fig. 2, but usefulness is slab shown in Figure 3.

Fig. 5 is one whole planar view that is provided with the cardboard slab of an otch on second panel.

Fig. 6 is and the similar view of Fig. 5, but usefulness is slab shown in Figure 5.

The specific embodiment

1, one single piece of cardboard 10 of ginseng accompanying drawing comprises the first, second, third and the 4th sidewall shaping panel now, and one the 5th latasuture shaping panel.These sidewall panel are labeled as 12,14,16,18 and 20 respectively.When folding and holding up sidewall panel, its upper end forms herringbone top, and its lower end forms a back cover.Jut 24 is general types, the 5th or the left side of latasuture shaping panel 20 or free edge cut cut during, be formed with tapering part 28.The line of fabricating 32 and 34 crosses an imaginary delta-shaped region, and this delta-shaped region will be described later.The right district 40 expressions one sealing area of first panel 12, this also will be described later.Two surfaces of slab all have barrier coat, and these barrier coats comprise polyethylene, and are the same with routine.Fig. 2 shows the step that is formed a socket by the cardboard slab 10 that is used for forming gable top container.The folder slab is to form a socket, and this socket has latasuture panel 20 residing longitudinal axis (not shown), make this plate overlap panel 12 free border area part or the zone 40 on.Before this, by flame or other processing mode, as the heating that panel 12 parts (seeing the zone 40 among Fig. 2) that will contact with latasuture panel 20 surfaces are carried out, heated side is seamed into the lower surface (as shown in Figure 2) of shape panel 20.These two generating surfaces are in the temperature higher than each surface of its slab opposite side (needn't be identical).Now, to pressing down second panel 14 and the 3rd panel 16, make panel 14 that the be shaped generating surface of panel 20 of latasuture is pressed onto on the local heating border area 40 of first panel 12.Because these parts of

panel

20 and 12 are heated, so becoming, the thermoplastic material of these parts is clamminess, the result forms one and engages or seam between

panel

12 and 18.

By the taper 28 on the latasuture shaping panel 20, form a delta-shaped region 30, this delta-shaped region also is heated with the remainder in the free border area of panel 12.Therefore, when pushing away

panel

14 and 16 downwards exerting pressure, thereby form that latasuture between the

panel

12 and 20 engages or during seam, the appropriate section 30A of second panel 14 just be bonded to the heat of panel 12 and the gable 30 that is clamminess on.This bonding socket that makes can not further be processed into herringbone top box.In the past, the sinter point of surface heat moulding material (normally polyethylene) that only falls

third constellations panel

12 and 20 to be eliminating this problem, but pays the cost that latasuture engages variation.

With reference now to Fig. 3,, the figure illustrates U.S. Pat 5,626,285 slab, the difference of the slab spare of this slab and Fig. 1 only is: removed line of cut 34 and 36 and enclosed fixed delta-shaped region.

With reference now to Fig. 4,, as can be seen, when downward

pressure surface plate

14 and 16 and when forming latasuture and engaging, zone or part that panel 12 just is not positioned at outside the tapering part 28 adhere on the regional 30A of panel 14.Therefore, except line of cut 34 and 36, and do not have thus outside the delta-shaped region shown in Figure 2 30, what demonstrate among Fig. 4 is exactly the such of routine.Is the border at the otch shown in Fig. 3 and 4 with line 34 and 36, and triangular in shape.Fig. 4 has shown the edge 28 and 34 that overlaps.But if necessary, line of cut 36 can be crooked or be parallel to zone 40 and directly stretches downwards, rather than shown in Figure 3 angled.As previously mentioned, in fact, Fig. 2 and seam shown in Figure 4 form step, are accompanied by from sidewall formation socket and the 5th panel 20 and carry out around its longitudinal axis Rotate 180 degree.

When U.S. Pat 5,626, the carton described in 285 is when the small size carton, and a difficulty that runs into just is, is utilizing automatic machinery will form carton bottom before carrying out can.Notch in first panel tendency hinders and is formed at second and the herringbone pinnacle at fourth face plate place neat folding.Therefore, advantageously, otch can be moved to second panel from first panel, but this otch is in still corresponding to by cutting off the bonding position that exposes that the bonding tabs forms.

With reference now to Fig. 5,, can see slab of the present invention.Second panel 14 has one and forms notch by free edge 134,136.Be connected to first panel 12 and after forming the tubulose carton, edge 136 cuts off the line 34 on limit corresponding to dividing it at bonding tabs 20.Free edge 134 is 136 bottoms that extend to the 3rd panel 16 from the edge.

Fig. 6 has shown notch is how to overlap to expose on the bonded areas 30 when socket is driven plain, and this to expose bonded areas be to form when bonding tabs 20 overlaps on the bonded areas 40 of first panel 12.The free edge 136 of notch aligns with the limit of cutting off of bonding tabs 20, can not contact with this part of second panel of carton 14 so that expose bonded areas 32.Utilize this mode, can prevent to flatten the unfavorable bonding of socket.When flattening, first and

fourth face plate

12,18 form lower floors, the second and the

3rd panel

14,16 forms upper stratas.The upper strata does not have to be adhered to the part of lower floor.Carton transports up to its a final can and leak free carton of forming with this structure.

Though invention has been described in a preferred embodiment,, can make numerous modifications and variations obviously, and not break away from spirit of the present invention for those of ordinary skills.Under any circumstance, foregoing description is not intended to get rid of what content with explanation, and the present invention is limited to the appended claims.

Claims

1. cardboard slab that is used to form container comprises:

One first, second, third, fourth and the 5th panel, these panels link to each other in turn along fold line;

Described the 5th panel is suitable and described first panel is overlapping and form a carton latasuture;

Described the 5th panel at one end cut off and

An otch, this otch are positioned at an end of described second panel.

2. cardboard slab according to claim 1, wherein, the shape of described otch is consistent with the shape of cutting off part of the 5th panel.

3. cardboard slab according to claim 1, wherein, described otch is triangular in shape.

4. cardboard slab according to claim 1, wherein, described incision extension is to described the 3rd panel.

5. tubular structure that is used to form container comprises:

Described the 5th panel and described first panel are overlapping and form a carton latasuture;

Described the 5th panel at one end cut off and

An otch, this otch are positioned at an end of described second panel.

6. tubular structure according to claim 5, wherein, the shape of described otch is consistent with the shape that the 5th panel cuts off part.

7. tubular structure according to claim 5, wherein, described otch is triangular in shape.

8. tubular structure according to claim 5, wherein, described incision extension is to described the 3rd panel.