JPH01139344A - Product manufactured from web as ribbon of bag with valve made of synthetic resin - Google Patents

Abstract

PURPOSE: To provide products which are made of the web of synthetic resin bag with a valve and suitable for the mechanical filling, by comprising two lateral welded portions closely kept into contact with each other for determining a limit of each single bag, and forming a slit line between two welded portions for separating the bags after the filling. CONSTITUTION: A product is made of a roll 1 formed by the web of the continuous bags 3 with valves 5 to be filled with a soft material, a slit line is formed between the bags 3 adjacent to each other by a series of cut lines, and the limit is determined by a pair of lateral welded portions formed for separating the bags. The welded portions 7 are closely kept into contact with each other, one of them is adjacent to the valve 5 of the corresponding bag, and the bag is filled in adjacent to the relating welded portion 7. The bags are rewound from the roll 1, and sent forward to be properly positioned so that the packaging material is filled before the separation on the basis of the reference represented by the outline of the bag adjacent to the welded portion 7 by a proper printed mark or a slit line 9 when necessary.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a flexible material to the bag with a predetermined contour and profile, cut and laminate portions affixed internally or externally or to constitute a retention valve for the contents of the bag. This invention relates to a synthetic resin bag with a valve and a folding section to enable filling of the bag. The production of bags of this type is known according to one possible embodiment by the application of a welded thickness or lining which forms a pocket; a cut in the wall of the bag completes the holding and filling valve.

The present invention relates to a package comprising a number of valved bags with one outer or inner adhesive or folding part, the package being suitable for mechanized filling in order to achieve as much automation as possible and mechanization of the filling operation. The product is suitable for making this possible.

With this in mind, the present invention is a ribbon web of valved plastic bags comprising two lateral welds that define the limits of each vehicle bag and are placed closely together. , between which a predetermined separation line is formed, which allows separation of the bag even after filling; the separation line corresponds to the fold of the bellows or gusset and the large thickness present there. In order to take into account the different drilling processes carried out, the product is provided.

In fact, it is advantageous for a pair of transverse welds to adjoin one valve of a continuous bag bounded by said welds.

Each predetermined cutting line is a line of adjacent cutting lines, which makes it possible to cut with already known devices.

The bag web or ribbon can be manufactured as a roll or bobbin.

Maintaining the continuity, the product comprising the bag web or ribbon is rolled up and by its unwinding the product formed by the bag subsequently appearing in the filling device is filled with a bag feeding device. Allowing easy mechanization of the system, the filling device fills the bags one by one as they appear; at least the last bag filled or to be filled remains continuous with respect to the remaining product fed. And it can stop the bag from being filled. The separation of the filled bags can be carried out immediately after filling at a station downstream of the filling device, or subsequently or at a distance from the filling device.

Valved bags for soft materials are formed by a lining of suitable fold or thickness, ie affixed internally or externally to the bag, layering a pocket therein, and at the bottom of the pocket forming a lining on the bag wall. is cut; the valve is arranged to allow the filling nozzle to penetrate at right angles to the transverse weld used to close the bag.

Preferably, the valve is placed adjacent to one of the lateral welds and with its mouth facing said weld, or parallel to the same weld.

According to a possible embodiment, the valve is arranged with its mouth facing towards the weld at a position substantially in the direction of the weld in the middle of the transverse length of the bag.

The valved bag may be of the type with diagonal welds of thickness forming bellows at the corners.

The drawings show possible embodiments of the invention.

In the one shown in the accompanying drawings, the product is made from a roll 1 formed by a web or ribbon of continuous bags 3 with valves 5 that allow filling with soft materials; , the bags 3 are closely spaced together and between which the separation line is bounded by a series of cuts, as shown in the drawings, by a single lateral weld placed to separate the bags. The welds 7 are close to each other and one of them is adjacent to the valve 5 of the corresponding bag, where filling of the bag is carried out adjacent to the associated weld 7.

The bag is unwound from the roll 1 and marked, if necessary, by appropriate printed marks or tear lines 9 and welds 7, respectively.
Using the criteria represented by the contour of the bag adjacent to the bag, the bag is transported forward appropriately to position it for filling when the packaging article or collection of bags is not yet separated, and thus into the filling process. enables automatic feeding of bags.

The filled bag is shown in FIG. 3, from which the presence of the valve 5 can be seen adjacent to the lateral weld 7. In FIGS. 3 and 4, the illustrated bag 3 is of the bellows type, while in FIG. 5 the bag is of the non-hello type. Figures 1-5 are mostly transversely placed lateral artificial valves; Figure 9 is a web or ribbon of a bag with mostly centrally placed longitudinal artificial valves.

The handle or thickness forming the valve may be provided on the inside or outside of the bag.

To form the bag 3, it is advantageous to mechanize and therefore automate the package of rolled products such as 1 to automate the filling operation of the bag; this reduces the filling costs and improves the filling operation. It is clear that this is particularly advantageous for increasing the speed, while also reducing the tedious labor of the operator, and ultimately the cost of this function.

The bags shown in Figures 6 to 10 are bellow-shaped;
That is, in addition to the two front pieces 11, 13, it is also provided with two longitudinally and laterally folded pieces 15 of a bellows type. The bag welds are delimited by the lower piece 17 and the upper piece 19, which influence two thicknesses and a double thickness corresponding to the bellows. In the illustrated embodiment, the bag further comprises diagonal welds at the corners, which influence the thickness of the two corresponding tongue portions; these additional welds 20 form the defined shape of the bag to be filled. and also prevents soft material from entering the corner S defined by the bellows.

The bag is manufactured with a valve of the type affixing a lining or one flexible layer of the same material as the bag as a lifetime affixed by welding along three sides into a U-shape; A cut in the material of the bag along the base of the letter is provided to define a valved passageway to the inlet of the bag for filling; a band or laminate is provided to prevent the escape of soft material contained in the bag and to facilitate filling. enable.

For a rational filling of the bag unwound from roll 1, the ball rental valve allows filling and discharging in the longitudinal direction, i.e. along the longitudinal direction indicated by the double arrow flO in FIG. It is arranged so that

In fact, according to what is shown, the valves 24 and 2
to the wall of the bag by a U-shaped weld indicated by 4A (
According to the drawings there is a welded stretch 24 glued (on the inside of the bag) between the two parts 24 of the weld and by a cut 26.
Adjacent to A is a batched laminate or hand thickness 22 forming a stretch-open pocket. This cut 26 may have a straight line or a curved shape on one side or the other.
Otherwise it can be provided with a tongue or even a profile.

Valves 22, 24, 24A and 26 are advantageously placed in close proximity to one of the transverse welds 19 in the drawing.

In any case, the described device allows the bag to be filled longitudinally, i.e. the insertion of filling and emptying devices,
It allows insertion in the direction along the double arrow flo for extraction and is advantageous for filling and emptying bags placed vertically or in positions significantly inclined to the horizontal. The longitudinal positioning and extent of the weld facilitates filling and emptying upon unwinding of the roll.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a series of bags with transverse valves unwound from a wound roll; FIG. 2 is a partial sectional view taken along the line ■-■ in FIG. 1. FIG. 3 shows the bag filled and separated. Figure 4 is a diagram of a bellows-shaped flattened bag. FIG. 5 is a view similar to FIG. 4 of a flattened bag of non-Hero type. FIG. 6 is a view similar to FIG. 1 showing an embodiment of a web or ribbon with a bag longitudinally and preferably (but not necessarily) centrally located; Figure 7 is a front view of the bag. FIG. 8 is a partial sectional view taken along the line ■-■ in FIG. 7. Figures 9 and 10 are IX-I of Figure 7.
FIG. 3 is a significantly enlarged partial cross-sectional view taken along the X-ray and the X-X line. 1-----roll, 3----bag, 5----valve,
7--- Lateral weld part, ! ll-separation line, 1
7. 19 - Lateral welds. 20---One diagonal weld, 22. 24. 2
6- Valve.

Claims (1)

[Scope of Claims] 1. A product made from a ribbon web of a synthetic resin valved bag (3), comprising a pair of delimiting lateral welds (7) placed closely together. , 17, 19) between which a predetermined tear line (9) is formed which allows separation of the bag even after filling; the web of ribbon is manufactured as a roll (1). A product made from web, which is the ribbon of a bag. 2. One valve of the bag (7, 17, 19) continuous with a pair of lateral welds (7, 17, 19) and delimited by said welds.
5; Claim 1 adjacent to 22, 24, 26)
Products listed in section. 3. The predetermined cutting line is a continuous notch (9) with different perforation stages corresponding to the bellows;
A product according to claim 1 or 2. 4. The valves (22, 24, 26) are installed and positioned to allow insertion of the filling nozzle in a direction perpendicular to the transverse weld (19) for closure of the bag. Products listed in scope 2. 5. A product as claimed in claim 4, wherein the valve is located at a substantially central position relative to the lateral length of the bag, facing towards the weld. 6. The product according to claim 2, wherein the valve is arranged with its mouth oriented parallel to the weld. 7. Product according to any one of claims 1 to 6, in which the corners of the bag are provided with diagonal welds (20) of a bellows-forming thickness in a known manner.