MXPA98000860A - Biaxally stretched bottle that has a carrying handle - Google Patents

Abstract

The present invention relates to a biaxially stretched bottle made of a polyester resin having a handle for transport formed by injection molding integrally on one side of a lower portion of a neck portion of a preform at the same time the mold is molded. preformed and applied with a shaped carrying handle of a thin-walled bottle shaped by blow-molding, characterized in that the carrying handle has a handle portion and a pair of arm portions integrally formed in a U-shape, the pair of the arm portions are integrally formed to continue with base portions composed respectively of a projecting part which are formed in symmetrical positions on both sides of the neck portion, the arm portions being longer than the neck portion in axial dimension , thus extending outward through the neck portion, and portions of bra are attached by attachment portions to the base portions, the attachment portions are locally contracted in thickness in a thin wall to provide molecular orientation to each joint portion, each arm portion and the handle portion, such that the handle to transport can be folded flexibly upwards and towards aba

Description

BOTTLE BIAXALLY STRETCHED OUE HAS A CARRYING HANDLE BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a biaxially stretched bottle, in which a carrier handle injection molded integrally with a preform on the side of the lower neck portion thereof is applied as a handle thus formed of the bottle. 2. Prior Art A biaxially stretched bottle represented by a bottle made of polyethylene terephthalate, so called a PET bottle, is formed by blown by stretching an injection molded preform, from an inner portion of a neck portion thereof. to a bottom portion thereof in length and width in order to have a thin wall. For these reasons, unlike a thin-walled bottle formed by blowing an intermediate shape made by extrusion molding, it is considered infeasible that a body portion thereof, be partly transformed into a handle under blow molding using a In this manner, or as described in U.S. Patent No. 3,441,172, a carrier handle is integrally compressed onto a shoulder portion of a bottle. Therefore, usually when a bottle is stretch blow molded, a handle is inserted into a lower neck portion of a preform, or an injection molded handle is separately inserted into a blow mold to join the side of the neck. a body portion of it. In some cases, in addition to the integration of the handle and a bottle by insertion, the handle is attached to a bottle using fastening means after the bottle has been formed. However, in both cases compared to a common method of producing a bottle that does not have a handle, the cost of facilities increases, since a preform and a handle have to be made separately and the problems remain unresolved with respect to the production. These problems can be solved by forming a handle integrally with a preform. However, other problems remain, in which the position where the handle is formed is limited within a portion of the lower neck, the shape of which does not change when the bottle is formed, and the shape of the handle is also limited to the aforementioned, on the stretch blow molding, a preform is stretched along its axis except for the neck portion.

For example, the handle described in WO82 / 02369 has a band shape and is integrally and horizontally formed on one side of the lower neck portion of a preform at the same time when the preform is injection molded, and has elliptical holes for allow several fingers to be inserted in it. Therefore, it is only a simple ace to carry a bottle, instead of a handle to hold a bottle firmly in a lateral position. A bottle having the simple carrier handle is also described in United States Patent No. 4,372,454. However, the known carrying handle becomes thick to have some resistance, and encounters difficulty in the moment of bending, because, not stretching together with the neck portion is hard and lacks flexibility, especially when the material of resin is polyethylene terephthalate (PET). The carrying handle can not be flexed vertically even when it is provided with a bending groove and the bottle hangs obliquely.

BRIEF DESCRIPTION OF THE INVENTION In the present invention, arm portions of a carrying handle are formed on both sides of the neck portion of a preform extending through a neck portion, although with well-known carrying handles, it is formed integrally with a neck portion at the same time when the preform is injection molded. This makes it possible for a carrier handle to rotate up or down around a limiter with a base portion as its axis, while forming horizontally with a base portion. In this manner, the present invention provides a novel biaxially stretched bottle having a carrying handle, where it changes in the position of a carrying handle holding portion, while it is difficult in a conventional handle made through integral forming, it becomes feasible in a bottle made of a resin material that lacks flexibility, and in addition to hanging the bottle in an almost vertical position, the natural change in the position of a holding portion of a carrying handle is feasible in accordance with the inclination of the bottle when emptying its contents. By thickening the joint portion between a base portion exiting on both sides of a neck portion and arm portions connecting both portions, the present invention solves the problem that a portion of the arm portions to a portion of fastening lacks flexibility, although a carrying handle is integrally formed along the sides of a neck portion. At the same time, the present invention provides a novel biaxially stretched bottle having a carrying handle, a joining portion which becomes rigid, becoming thick to resist repeated bending.

Furthermore, it is made possible through the present invention that the direction of a bottle is naturally defined to empty the contents even in a large bottle used for a water or oil container, specifically defining the position of the base portions that they will be integrally formed with a preform. Also, the present invention provides a novel biaxially stretched bottle having a carrying handle, in which during emptying a corner of the bottle is placed downward specifying the carrying handle direction in the case of a bottle with a body portion with an angled shape. For the above purpose, the present invention provides a biaxially stretched bottle made of a thermoplastic resin having a carrying handle formed through molding integrally by injection onto the side of a lower portion of a neck portion of a preform at the same time when the preform is molded and applied as formed as a carrying handle of a thin-walled bottle formed through stretch blow molding, wherein the previous carrying handle has a holding position and a pair of arm portions integrally formed in a U-shape, a pair of the arm portions are formed integrally for to continue with the base portions composed of projecting pieces, which are formed in a symmetrical position on both sides of the neck portion and are longer than the neck portion in an axial dimension, thus extending outwardly through the portion of the neck, and joining the portions of the base portions with the arm portions which are locally contracted in their thickness towards the thin wall, thus providing flexible joining portions which allow bending up and down. Furthermore, the above base portions are formed from a central line of the bottle in symmetrical positions on both sides of the neck portion, and the deviation of the positions of the base portions, causes the bottle to tilt slightly when hanging from that edge of a mouth on the neck portion opposite the carrying handle that provides a draining side. In addition, the holding portion and a pair of arm portions possess flexibility due to the molecular orientation of a resin that forms the joining portions by contracting the boundaries of the previous base portions and the arm portions. In addition, when a body portion of the bottle is formed in an angular configuration the anterior carrying handle is formed towards a corner of the bottle so that the corner opposite the carrying handle provides a pouring side. The above bottle can be made of a thermoplastic resin comprising polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) and thermoplastic resins such as polypropylene. In the case of a biaxially stretched bottle made of a polyester resin, the flexibility due to the molecular orientation of the resin by the thinning of the above joining portion is due to a tester handle even when molded by injection. In this way, the joint portions as well as the grip portion and the arm portions increase the resistance to bending and impact resistance and encounter difficulty in breaking. Furthermore, in the case of polypropylene, its flexibility is still further improved. In a biaxially stretched bottle having a carrying handle, since a carrying handle formed across both sides of a neck portion can be bent up and down in the thin wall joining portions the carrying handle is naturally flexed around of the thin-walled joint portions due to the weight of the bottle when it hangs causing the carrying handle in a vertical direction to turn upwards with the joint portions as its axis, although the carrier handle is placed laterally and in this way the bottle can be hung. Furthermore, it is easy to judge that the edge of a mouth on the neck portion opposite the carrying handle is a draining side, since the base portion of the carrying handle is in an eccentric position. Thus, its cnt is easily emptied even from a heavy bottle of large size for water or oil supporting the bottom portion on the side of the carrier handle since the emptying is performed inclined the bottle with an edge of the mouth of the portion from neck down.

BRIEF DESCRIPTION OF THE DRAWINGS These objects and advantages of the present invention will become more apparent from the following description with reference to the accompanying drawings, in which: Figure 1 illustrates a front view of a biaxially stretched bottle with a carrying handle according to a embodiment of the invention; present invention; - Figure 2 shows a plan view of the Figure 1; Figure 3 shows an enlarged side view of the half of a neck portion, - Figure 4 shows a side view of an upper portion of a bottle illustrating the rotary movement of a carrying handle; Figure 5 shows a side view of an upper portion of a bottle illustrating the position of a carrying handle at the moment of emptying; Figure 6 shows a plan view of a mold for forming a body portion of a preform illustrating a cavity for molding by injection of a carrier handle; and Figure 7 shows a cross-sectional view taken along the position A-A of Figure 6, wherein a neck forming mold and a body forming mold are in a closed state.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES In the Figures, the reference numeral 1 designates an angular shaped PET bottle, formed by biaxial stretching from a lower portion of a neck portion 2 to a body portion 3 and a bottom portion 4 to have a wall thin . A carrying handle 6 is integrally formed on a side surface of the lower neck portion 2 below a screw 5 on an outer periphery of the neck portion 2. The carrying handle 6 is injection molded integrally with a preform 10 and it is applied as the carrying handle 6 of the bottle 1 is formed. The carrying handle 6 composed of a holding portion 61, in which an inner edge is formed broadly, enough to be a working edge, and a pair of portions of arm 62, 62 formed on both sides has the shape of U in plan, integrally formed in flat form from a long and narrow piece.

The anterior arm portions 62, 62 which are longer than the neck portion 2 in an axial dimension, are integrally formed with base portions 7, 7 of protrusion pieces formed in symmetrical positions on both sides of the neck portion. 2, thus providing the carrying handle 6 extending over the entire length outwardly through both sides of the neck portion 2. The base portions 7, 7 extend radially in width and in the same thickness as the arm portions 62. from a radial ring 8 exiting at a predetermined distance downwardly from a support ring 21, which exits around the outer circumference of the neck portion 2. A boundary of the base portion 7 and the portion of arms 62 provides a connection portion 9 that allows to bend up and down freely, since it is formed in a thin wall by locally contracting its thickness. In the case of a bottle having no support ring 21, a radial ring 8 is formed behind a screw 5, thus providing the base portions 7, 7. There is no problem if the formation of the positions of the portions of extension base 7, 7 is on the centerline of a main body of the bottle. However, considering the operation of emptying a content, it is preferable that the forming positions of the base portions 7, 7 be separated from the centerline of the bottle in symmetrical positions on both sides of the neck portion near the center line XX, and the deviation of the positions of the base portions 7, 7 causes the bottle to tilt slightly when hung, that a user will be able to easily observe that the edge of the mouth on the neck portion opposite to the carrier beam 6 a draining side is provided even when the carrier handle 6 is positioned vertically through the mouth of the neck portion. When a body portion 3 of a bottle 1 has an angular shape and is directional, it is also preferable, as shown in Figure 2, for a carrying handle to be formed towards any corner 31 of the bottle, in this case, a corner 32 opposite the carrying handle 6 is placed downward for emptying. It is easy to empty its contents in a small residual amount since the corner 32 placed downwards acts as a dropper where the content becomes bulky. The thinning of the connecting portion 9 by contracting the boundary of the base portion 7 and the arm portion 62 is performed under injection molding of the carrying handle 6. As shown in Figures 6 and 7 a flat cavity 11 for a handle carrier, which forms a carrying handle 6, covers a dividing plane of both a neck forming mold 12 and a mold formed of body 3, for molding a preform 10 and this is connected to a cavity 14 for a body portion . The position in which the anterior joining portion 9 is formed in the cavity 11 for a carrying handle is provided in a contracted portion forming a flow separation 15 equalizing the respective mold planes, thus forming a cavity 16 for a portion of base. The dimension of the flow space 15 for forming the joint portion 9 may preferably be 0.5 mm or less. A molten resin passes from the side of the cavity 16 for a base portion through the flow gap 15 to the cavity 11 for a carrier handle. The molecular orientation of the resin is carried out by passing through the flow separation 15 with a limited size thereby providing flexibility with a resin forming the binding portion 9 and the carrier handle 6. Particularly, by making the thin wall, the portion of junction 9 is made rigid enough to resist bending stress. In this way, the carrying handle is bent in the connecting portion 9 and rotates up and down with the connecting portion 9 as its axis (see Figure 4). In this way, the carrying handle 6, while extending horizontally in length towards the outer part of the neck portion 2 being formed, is used as a carrying handle 6 that extends vertically through the mouth over the portion of the neck. neck as shown in Figure 4. When the carrier handle 6 is held in one hand with the bottom portion 4 of the bottle 1 supported with the other hand to tilt the bottle with an edge of the mouth over the neck portion toward down to empty its contents, the carrying handle 6 naturally bends and rotates obliquely moving towards the position shown in Figure 5. In this way, the carrying handle 6 can not resist against the inclination of the bottle so that a heavy bottle which varies from 3 liters to 5 liters can be easily emptied. In the above embodiments, the carrier handle 6 has the form of U in plan, however, since the shape can be arbitrarily set so that it is basically U-shaped, the shape of the carrying handle 6 in the present invention is not limited within the illustrated ones. In addition, a cross section of the carrying handle 6 and the base portions 7 is not limited to having a flat shape, since circular and helical shapes are possible.

[Example] Bottle for cooking oil: 5 liters (angular shape). Resin material: teref alat'o polyethylene. Height of the neck portion: 35 mm. External diameter of a neck portion: 42 mm. Total length of the carrying handle: 66 mm. Width of a carrying handle (clamping side): 85 mm.

Width of a carrying handle (base portion side): 63 mm. Extension of a carrier handle and a base portion: 7.0 mm. Thickness of a carrying handle and a base portion: 1.5 mm. Length of a piece that leaves a base portion: 8.0 mm- Length of a joint portion: 2.0 mm. Thickness of a joint portion: 0.5 mm. Since the presently preferred embodiments of the present invention have been shown and described, it will be understood that the present invention is not limited thereto and that various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. as set forth in the claims.

Claims (8)

1. A biaxially stretched bottle made of a thermoplastic resin having a carrying handle formed integrally through injection molding on one side of the lower portion of a neck portion of a preform at the same time when the preform is molded and applied according to it is formed as a carrying handle of a thin-walled bottle formed by stretch blow molding, characterized in that the handle. carrier has a holding portion and a pair of arm-shaped portions formed integrally in a U-shape, or a pair of arm portions is formed integrally to continue with these base portions respectively composed of an outgoing part which are formed in symmetrical positions on both sides of the neck portion and become larger than the neck portion in the axial dimension, thus extending outwardly through the neck portion and attachment positions of the base portions with the arm portions which are locally contracted in thickness towards the thin wall, thus providing flexible joining portions that bend up and down.

2. A biaxially stretched bottle according to claim 1, wherein the base portions are formed in a symmetrical position on both sides of the neck portion with a central bottle line, and the deviation of the positions of the base portions makes that the bottle tilts slightly when hung from the edge of a mouth of the neck portion opposite the carrying handle providing a draining side.

3. A biaxially stretched bottle according to claim 1, wherein the holding portion and a pair of the arm portions have flexibility due to the molecular orientation of the resin in forming the thin-walled joining portions by contracting the respective limits of the base portions and arm portions.

4. A biaxially stretched bottle according to claim 2, wherein the holding portion and a pair of the arm portions have flexibility due to the molecular orientation of a resin forming the thin wall joining portions by contracting the respective boundaries of the portions of base and arm portions.

5. A biaxially stretched bottle according to claim 1, wherein the carrying handle is formed towards one of the corners of the bottle, the body portion which is formed in an angular configuration so that a corner opposite the carrying handle provides a emptying side.

6. A biaxially stretched bottle according to claim 2, wherein the carrying handle is formed towards one of the corners of the bottle, the body portion of which is formed in an angular configuration such that a corner opposite the carrying handle provides one side of emptying. ,

7. A biaxially stretched bottle according to claim 3, wherein the carrying handle is formed towards one of the corners of the bottle, the portion of the body of which is formed in an angular configuration such that a corner opposite the carrying handle provides one side of emptying. • A biaxially stretched bottle according to claim 4, wherein the carrier handle is formed towards one of the corners of the bottle, the body portion of which is formed in an angular configuration so that a corner opposite to the Carrier handle provides a draining side.