CH711925A1 - Glass bottle with bottleneck with bottleneck outer blind holes for a swing top closure. - Google Patents

Abstract

Shown and described is a glass bottle with bottle neck (11) with flaschenhalsaussenseitigen blind holes (19, 19 ') for a clip closure. According to the invention, it is provided that the blind holes (19, 19 ') are asymmetrical.

Description

description

TECHNICAL FIELD OF THE INVENTION

The invention comprises a glass bottle according to the preamble of claim 1.

BACKGROUND OF THE INVENTION

Used in the food industry glass bottles may be provided with clip closure to close, for example, beverage bottles, which are under pressure due to the carbon dioxide content in the drink. The opening and closing of a swing-top closure can be done as often as desired by hand and requires no aid. Conventional swing top glass bottles are made of soda lime glass, a bulk glass used to make container glass and flat glass. Lime-soda-glass has relatively good chemical properties and is suitable for products that usually have to withstand short-term chemical stress and are not subject to high thermal loads.

A glass material which better withstands various influences is for example the borosilicate glass. This is known as a chemical, temperature and temperature change resistant glass and is widely used as a container glass in chemistry and generally in the industry.

It has now been found that a production of U-shaped glass bottles from another glass material is not readily possible When using borosilicate glass as the starting material for U-shaped glass bottles, the circular puncture holes in the bottle neck, which are provided for the attachment of the U-bolt, to cracks at the cooling of the glass.

TASK

It is therefore an object of the present invention to find a solution to the problem of cracking. In particular, it is the object of the present invention to provide an alternative glass bottle or an alternative glass bottle neck for clip closures and an alternative method for producing a glass bottle or a glass bottle neck for clip closures. In particular, it is an object of the present invention to provide a glass bottle of borosilicate glass which is suitable for clip-on closure.

DESCRIPTION OF THE INVENTION

In the manufacture of glass bottles, in particular the usual press-blow process, cracks may occur around the blind holes. This problem is particularly acute with glass bottles made of glass other than soda-lime glass, e.g. made of borosilicate glass. If the blind holes are formed as usual in conventional soda-lime glass bottles as circular cylindrical depressions, then, depending on the glass composition, cracks in the bottleneck result in areas around the blind holes. Surprisingly, it has been found that cracks, especially in non-soda-soda glasses, e.g. Borosilicate glass, can be prevented if the blind holes are formed asymmetrically at least in the bottle neck longitudinal direction and thus have an overall inhomogeneous blind hole pattern.

The term blind hole image includes in particular the hole contour with its sequence of concave and convex shaped areas, the ratios of concave and convex shaped areas and their Symmetrieausbildung or lack of Symmetrieausbildung.

An inventive glass bottle containing a bottleneck with bottleneck-outside blind holes for a clip closure is characterized in that the blind holes are asymmetrical. Cracking in glass bottle production can be prevented. In particular, the blind holes have no rotational symmetry.

The listed below further advantageous embodiments lead alone or in combination with each other to further improvements of the blind holes and thus the flip top glass bottle.

Each blind hole is conveniently formed as a curved surface. A proportion of plan, i. E. not curved surfaces in the blind hole is preferably limited to a maximum of 40%, more preferably to a maximum of 30%, even more preferably to a maximum of 20% and even more preferably to a maximum of 10% of the total blind hole area. Preferably, each surface curvature in the blind hole, including the edge between bottleneck outer wall and blind hole (ie the blind hole edge), has a radius of curvature of at least 1 mm or more, more preferably at least 1.2 mm or more, more preferably at least 1.3 mm or more ,

In an advantageous embodiment, the blind hole has no planes, i. E. no plane surfaces, on. In particular, each blind hole is expediently designed as a single curved surface; i.e. 100% of the blind hole surface is formed as a curved surface Advantageously, each surface in the blind hole, including the edge between Flaschenhalsaussenwand and blind hole (ie the blind hole edge), a radius of curvature in the range of at least 1 mm and not more than 10 mm, more preferably in the range of at least 1, 2 mm and a maximum of 7 mm, more preferably in the range of at least 1.3 mm and a maximum of 5 mm.

Functionally, it is advantageous if the blind hole line (or hole contour) in the bottleneck longitudinal direction course near the mouth of the bottle mouth (i.e., blind-hole upper side) is steeper than the bottle mouth (i.e., blind hole underside). Thus, overall, the legs of the blind hole in the bottle neck longitudinal course are shaped differently. The steeper design in the area close to the bottle mouth of the blind hole serves to support the closure bar in the closed position of the clip closure and when opening and closing. The shallower version in the bottle mouth remote area of the blind hole increases the blind hole volume and was surprisingly recognized as a crack-reducing This flatter design in the bottle mouth distant area of the blind hole may optionally, if it is pronounced, cause a partial slipping of the bracket in the open position, but with Be tolerated for the benefits of a reduced tendency to crack and wrinkle.

Advantageously, the glass bottle is made of borosilicate glass. Borosilicate glass normally has better temperature resistance, better thermal shock resistance, pore-free and smoother surfaces, and thus better gloss and risk of bacterial attack, higher strength, and thus less likely to break when dropped, and in particular, higher chemical resistance compared to conventional soda-lime glass a better acid resistance.

Glass bottle according to one of the preceding claims, characterized in that identify the blind holes in that the blind hole contour line a plane (or in other words - that the blind hole contour line, which lies in a plane), which is spanned by the bottleneck longitudinal axis and a radial direction, has no mirror symmetry. This can be referred to as a first inhomogeneity. A blind hole contour line is understood as a sectional view of a particular plane with the blind hole or its contour. For the case described, the blind hole contour line thus lies in a vertical cross-sectional plane with respect to a vertical bottle.

As a second inhomogeneity of the aforementioned hole shape in the bottleneck longitudinal course differing hole shape can be called in the circumferential direction. Because the blind holes are advantageously further characterized in that the blind hole contour line of a plane normal to Flaschenhalslängsachsrichtung (or in other words - that the blind hole contour line which lies in a plane normal to Flaschenhalslängsachsrichtung) has a mirror symmetry. For the case described, the blind hole contour line thus lies in a horizontal cross-sectional plane with respect to a vertical bottle. The mirror symmetry is a mirror straight line in the radial direction (and thus normal to the bottleneck longitudinal axis).

The blind holes are advantageously characterized in that a plane, spanned by the Flaschenhalslängsachsrichtung and a radial direction, which leads centrally through a blind hole, forms a mirror plane for said blind hole.

The blind holes are preferably characterized in that the blind hole contour line is formed in a plane normal to Flaschenhalslängsachsrichtung tulip-shaped with splayed legs and has spread legs.

Optionally, the first inhomogeneity may be described as the blind holes being characterized as being flatter with respect to the bottleneck longitudinal axis in a direction away from the bottleneck mouth edge (i.e., towards the bottle body) than toward the bottleneck mouth rim. More concretely, the blind holes can be described by making a tangent to the blind hole contour line of the bottom (ie, the rim) distal of the blind hole to the outer bottle neck surface smaller in axial longitudinal section than a tangent to the blind hole contour line of the upper (ie near the rim of the bottle), the transition from concave to convex curvature of the blind hole.

Optionally, at the bottleneck around the respective blind hole around a material accumulation can be formed with increased wall thickness. An accumulation of material is preferably formed on the outside of the bottle neck.

Conveniently, the glass bottle according to the invention is produced by the press-blow process. A blank is pressed on the neck of the bottle, in particular the blind holes are also pierced. The shaping of the blind holes thus takes place expediently in one pressing step. At the same time and / or shortly before or after, the bottle body is inflated (preferably against a shaping structure).

Here and in the following where preferred ranges are given, further preferred ranges result from combinations of the minima and maxima mentioned in the ranges.

BRIEF DESCRIPTION OF THE FIGURES

Further advantages and advantageous features will become apparent from the following detailed description of several embodiments of the invention with reference to schematic representations. In a not to scale, schematic representation:

1 shows a longitudinal sectional view of a bottle neck section according to the invention along the bottle neck axis up to the mouth;

FIG. 2 shows an enlarged detail of the hole area in FIG. 1; FIG.

3 is a comparative section of a hole portion of a prior art embodiment;

4: a superimposition of the hole region of the embodiment according to the invention in FIG. 2, the embodiment according to the prior art in FIG. 3 and a further, alternative embodiment according to the invention;

5 is a plan view of the inventive bottle neck portion of FIG. 1 with identification of the

Hole region; the line AA indicates the sectional image position for the longitudinal sectional image of Fig. 1;

6 shows an enlarged detail of the hole area in FIG. 5;

Fig. 7 is a comparative section of a hole portion of a prior art embodiment;

8 shows a superposition of the hole region of the embodiment according to the invention in FIG. 6, the embodiment according to the prior art in FIG. 7 and a further, alternative embodiment according to the invention;

9 shows a longitudinal sectional view of a further alternative bottle neck section according to the invention along the bottleneck axis up to the mouth;

10 shows a plan view of the further alternative bottle neck section according to the invention according to FIG. 9 with identification of the hole area; the line AA indicates the sectional image position for the longitudinal sectional image of Fig. 9;

11 shows an example of a blind-hole dimension distribution according to an embodiment according to the invention: (a) blind-hole line in the longitudinal direction, (b) blind-hole line in the peripheral circumferential direction.

12 shows an example of a blind-hole dimension distribution according to a conventional embodiment: (a) blind-hole line in the longitudinal direction, (b) blind-hole line in the peripheral circumferential direction.

DETAILED DESCRIPTION OF THE FIGURES

In the following, the same reference numerals are used for the same or functionally identical elements in different figures. An additional apostrophe is used to distinguish between several similar or functionally identical elements.

In Figs. 1, 5, 9 and 10 embodiments of an inventive glass bottle neck are shown with blind holes for attachment of a swing-top closure. For a first embodiment in Figs. 1 and 5 details of the blind holes in Figs. 2 and 6 are shown. FIGS. 3 and 7 show blind holes according to the prior art. In FIGS. 4 and 8, the first blind-hole variant according to the invention and an alternative modification thereof are compared with a conventional blind-hole design in a comparative manner. FIGS. 9 and 10 show a further, alternative embodiment according to the invention. In Fig. 11a and 11b) a concrete embodiment is shown in the invention relevant dimensioning. By comparison, Figs. 12a and 12b show a conventional embodiment.

The bottle neck portion 11 of a glass bottle shown in Fig. 1 as a longitudinal section and in Fig. 5 as a plan view is shown from the beginning of a usual but optional bottleneck wall reinforcement 12 to and with the mouth edge 13. The bottleneck inner wall 15 is expediently made flat and has a cylindrical or a passage which opens slightly conically toward the mouth, which can be expedient in terms of manufacturing technology. In the bottle outer wall 17 are two blind holes 19, 19 'at two diametrically opposite positions. The blind holes 19, 19 'are for attachment, i. for insertion or anchoring, a clip closure. An e.g. Commercially available U-bolt (not shown in the figures), which consists of an upper wire hanger with lid part and seal and a lower wire hanger can be conveniently anchored in the blind holes on the wire ends of the lower bracket. The blind holes 19, 19 'are formed asymmetrically at least in the direction of the bottle neck longitudinal direction (as shown in FIG. 1) and thus have an inhomogeneous blind hole pattern. The blind hole line (or hole contour) 21, 21 'in the bottleneck longitudinal direction with respect to the bottleneck outer wall 17 close to the bottle mouth (ie blind top side) is formed steeper than the bottle mouth (ie blind hole underside) - or in other words - the angle between the tangent (see FIG. a)) at the transition region from the convex input curvature 31 to the concave hole base curvature 33 of the upper region of the blind hole line 21, 21 'and the bottleneck outer wall 17 is greater than the angle between the tangent (see Fig. 11 (a)) at the transition region from the convex input curvature 37 concave bottom hole curvature 35 of the lower portion of the blind hole line 21, 21 'and the bottleneck outer wall 17. Each of the tangents typically forms an angle with the adjacent bottle neck outer wall portion which is smaller than 90 °.

Preferred embodiments are characterized in that in the axial longitudinal section the tangent to the blind hole contour line 21 of the lower (ie the flaschenrandfernen) transition from concave 35 to convex 37 curvature of the blind hole 19, 19 ', 92, 92' with the outer bottle neck surface an angle in the range of 10 ° to 70 °, preferably in the range of 20 ° to 65 °, forms and the tangent to the blind hole contour line 21 of the upper (ie the bottle edge near) transition from concave 33 to 31 convex curvature of the blind hole 19, 19 ' , 92, 92 'with the outer

Bottle neck surface forms an angle in the range of 65 ° to 85 °, preferably in the range of 70 ° to 80 °. In Fig. 2, the said tangents are not shown. However, a comparison with Fig. 11 (b) illustrates their location.

Conveniently, the blind holes have no undercuts.

A conventional blind hole at the bottleneck for a strap closure is shown in Figs. 3 and 7. The glass material used to make a conventional bottle is usually a soda-lime glass. The blind hole 41 is a cylinder-like puncture hole. It has in particular a circular cylindrical shape. The corresponding blind hole line 43 has a symmetrical shape in the direction of the bottleneck longitudinal direction. Each of the transition area tangents or the cylinder wall typically forms an angle of approximately 90 ° with the adjoining bottleneck outer wall section (essentially a straight cylindrical shape). Especially with non-soda-soda lime glass, e.g. Borosilicate glasses, such puncture holes lead to cracks during the cooling of the glass.

In order to reduce and preferably prevent cracking and wrinkling on and around blind holes (in, for example, borosilicate glasses), the radii and the hole pattern or the hole contour of a conventional blind hole would have to be made substantially larger or more generous. However, if the radii and hole contour are too generous (because the hole volume is very large, for example), the temple may be pulled upwards due to the strong force and also towards the sides when the temple tips out.

An upward force ensures the pressure and the seal, i. the clip closure pulls lid and sealing ring downwards, equally the force acts on the top of the blind hole. A force acting on the sides of the blind hole may be directed to the front of the lower bracket, because when opening the lower bracket in the blind hole pulled forward, or be directed to the other backwards from the lower bracket away, because when closing pushes the lower bracket back before the Pressure is then passed in the closed end position substantially upwards. For this reason, it is advantageous if, on top of the blind hole, where the greatest force is applied, a pronounced stop (for example over a large area) holds the clip in the blind hole. Sacklochseitlich certain stop properties are also required. The lowest forces act downwards, but slipping out of the opened swing-top closure should be prevented.

In Fig. 4 is a comparison in the bottle neck longitudinal direction of a conventional blind line 43 and a first inventive blind line 21 with outlet 53 shown down and a second novel blind line of a blind hole with larger volume due to a lower outlet 55 down.

The second invention blind hole variant as shown above (Fig. 4), in comparison to the first blind hole variant indicates that down more blind hole volume can be generated, but the blind hole shape upwards and - as explained below - on the side has less headroom.

In Fig. 5, the hole pattern of the blind hole 19 is shown in cross-section to the bottleneck elongation in a plan view of the bottleneck mouth 13. Here are blind lines 61,61 'shown in the circumferential direction of rotation. These blind hole lines 61, 61 'are preferably formed symmetrically, in particular symmetrically with respect to a common diameter straight in the cross-sectional plane or with respect to a plane through the bottle neck longitudinal axis.

8 shows that the blind line according to the invention 61 is significantly flatter and thus the blind hole 19 according to the invention in the peripheral circumferential direction (FIG. 6) is wider and more voluminous overall than the conventional blind hole 41 (Figure 7).

The blind lines 61 and 81 in the circumferential direction of rotation of the two embodiments shown in Fig. 4 according to the invention are congruent in Fig. 8. The second blind-hole variant according to the invention as shown above (FIG. 8) thus indicates, in comparison to the first blind-hole variant, that the blind-hole shape also has less clearance on the side than downwards.

FIGS. 9 and 10 show a longitudinal sectional view and a plan view of a further alternative blind hole variant according to the invention. This blind hole 92, 92 'has a distinct, i. relatively short and steep stop at the blind hole top and on the other hand at the bottom of the blind hole a relatively long and flat outlet 95. The blind line 101 has a pronounced blind hole bottom in the circumferential direction of rotation course.

In Fig. 11 and in Fig. 12 concrete blind executions of an inventive embodiment are preferably shown a conventional design. From this, preferred hole dimension ratios can be derived.

An advantageous embodiment is characterized in that blind hole bottom side (ie on the bottle edge side of the blind hole), the sum of convex edge radius 37 and concave hole radius 35 is greater than blind hole top side (ie on the near the bottle edge side of the blind hole) the sum of convex edge radius 31 and concave hole radius 33.

An advantageous embodiment is characterized in that blind hole top side (ie on the side of the blind hole near the bottle edge) the sum of convex edge radius and concave hole radius 31 and 33 is greater than 50%, preferably greater than 60%, more preferably greater than 70 %, more preferably greater than 80%, more preferably greater than 90%, more preferably greater than 100%, the depth of the hole, and / or that of the blind hole (ie with respect to the

Bottleneck (achs) along the side of the blind hole) the sum of convex edge radius and concave hole radius is greater than 50%, preferably greater than 60%, more preferably greater than 70%, more preferably greater than 80%, further preferably greater than 90%, more preferably greater than 100%, the hole depth. It is believed, without specifying, that glass material having poorer molding properties (eg, tougher) under processing conditions (particularly molding conditions such as pressing and blowing in the manufacture of bottles) than conventional glass material (ie, tougher than conventional soda lime glass ), in the asymmetric embodiment according to the invention of a total possible voluminous trained and / or in particular as complete as possible rounded bottom hole execution particularly benefits because due to the special design of shaping processes less flow distortions arise and thus less or no cracks are contained in the cooled glass.

While specific embodiments have been described above, it will be apparent that various combinations of the illustrated embodiments may be used so far as the embodiments are not mutually exclusive.

While the invention has been described above with reference to specific embodiments, it is obvious that changes, modifications, variations and combinations may be made without departing from the spirit of the invention.

LIST OF REFERENCE NUMBERS

Bottle neck section according to a first inventive variant, essentially a wall-reinforced Flaschenhalsendbereich 12 transition to wall reinforced Flaschenhalsendbereich 13 Flaschenhalsündungsrand 15 bottleneck inner wall 17 bottleneck outer wall 19, 19 'blind hole 21, 21' blind hole (contour) line in the longitudinal direction 31 upper convex curvature 33 upper concave Curvature 35 lower concave curvature 37 lower convex curvature 41 round blind hole according to the prior art 43 blind hole (contour) line in the longitudinal direction according to the prior art 53 outward run according to the first inventive variant 55 outward run according to a second inventive variant 61, 61 'blind hole (contour) line in circumferential direction 71 blind hole (contour) line in peripheral circumferential direction according to the prior art 81 blind hole (contour) line in peripheral circumferential direction according to the second inventive variant 91 bottle neck section according to a third invention Variant, essentially a wall-reinforced bottleneck end region 92, 92 'Blind hole 93 Blind line in longitudinal direction 95 Outflow to the bottom 99 Transition to wall-reinforced bottleneck end region

Claims (15)

101 blind hole line in circumferential direction claims A glass bottle with bottle neck (11,91) with bottleneck outer side blind holes (19,19 ', 92, 92') for a clip closure, characterized in that the blind holes (19, 19 ', 92, 92') are asymmetrical. 2. Glass bottle according to the preceding claim, characterized in that the blind line in Flaschenhalslängsrichtungsverlauf bottle mouth is formed steeper steeper than flaschenmündungsfern. 3. Glass bottle according to one of the preceding claims, characterized in that the glass bottle is made of borosilicate glass. 4. Glass bottle according to one of the preceding claims, characterized in that each blind hole (19, 19 ', 92, 92') is formed as a curved surface, wherein each surface curvature in the blind hole has a radius of curvature of at least 1 mm or more, preferably of at least 1 , 2 mm or more, more preferably at least 1.3 mm or more. 5. glass bottle according to one of the preceding claims, characterized in that identify the blind holes in that the blind hole contour line (21, 53, 55, 93, 93 ') of a plane which is spanned by the bottle neck longitudinal axis and a radial direction, no mirror symmetry 6. glass bottle according to one of the preceding claims, characterized in that the blind holes further identify by the fact that the blind hole contour line (61, 61 ', 101, 101') of a plane normal to the bottle neck longitudinal direction has a mirror symmetry. 7. glass bottle according to one of the preceding claims, characterized in that the blind holes further identify by the fact that a plane, spanned by the bottle neck longitudinal direction and a radial direction which centrally through a blind hole (19, 19 ', 92, 92') leads, a Mirror plane forms for said blind hole. 8. glass bottle according to one of the preceding claims, characterized in that the hole pattern further identifies characterized in that the blind hole contour line (61,61 ', 101,101') in a plane normal to Flaschenhalsachsrichtung splayed leg has or is tulip-shaped. 9. Glass bottle according to one of the preceding claims, characterized in that the blind holes (19, 19 ', 92, 92') identify by the fact that they flatten with respect to the bottleneck longitudinal axis in the direction of the bottleneck edge flatter than towards the bottleneck. 10. glass bottle according to one of the preceding claims, characterized in that identify the blind holes in that in axial longitudinal section a tangent to the blind hole contour line (21) of the lower (ie the flaschenrandfernen) transition from concave (35) to convex (37) curvature of the Blind hole (19, W, 92, 92 ') with the outer bottle neck surface forms a smaller angle than a tangent to the blind hole contour line (21) of the upper (ie the bottle edge near) transition from concave (33) to convex (31) curvature of the blind hole. 11. glass bottle according to the preceding claim, characterized in that in the axial longitudinal section, the tangent to the blind hole contour line (21) of the lower (ie the flaschenrandfernen) transition from concave (35) to convex (37) curvature of the blind hole (19,19 ', 92 , 92 ') forms an angle in the range of 10 ° to 70 °, preferably in the range of 20 ° to 65 ° with the outer bottle neck surface, and the tangent to the blind hole contour line (21) of the upper (ie the edge near the bottle rim) of concave ( 33) to a convex (31) curvature of the blind hole (19, 19 ', 92, 92') with the outer bottle neck surface forms an angle in the range of 65 ° to 85 °, preferably in the range of 70 ° to 80 °. 12. glass bottle according to one of the preceding claims, characterized in that blind hole bottom side (ie on the bottle edge side of the blind hole), the sum of convex edge radius (37) and concave hole radius (35) is greater than the blind hole top side (ie on the near the bottle edge side of the blind hole) Sum of convex edge radius (31) and concave hole radius (33). 13. Glass bottle according to one of the preceding claims, characterized in that the blind hole upper side (ie on the bottle edge side of the blind hole), the sum of convex edge radius (31) and concave hole radius (33) is greater than 50%, preferably greater than 60%, more preferably greater than 70%, more preferably greater than 80%, more preferably greater than 90%, more preferably greater than 100%, the depth of the hole. 14. glass bottle according to one of the preceding claims, characterized in that the blind hole long side (ie with respect to the Flaschenhalsachsrichtung side of the blind hole) the sum of convex edge radius and concave hole radius is greater than 50%, preferably greater than 60%, more preferably greater than 70% , more preferably greater than 80%, more preferably greater than 90%, more preferably greater than 100%, the depth of the hole. 15. A method for producing a glass bottle with a bottle neck (11, 91) with bottle neck outer blind holes (19, 19 ', 92, 92') for a clip closure, in particular for a glass bottle according to one of the preceding claims, characterized in that the shape of the Blind holes (19, 19 ', 92, 92') is made in a pressing step.