EP1991096A1

EP1991096A1 - Double-walled vessel

Info

Publication number: EP1991096A1
Application number: EP06761259A
Authority: EP
Inventors: Jørgen BODUM
Original assignee: Pi Design AG
Current assignee: Pi Design AG
Priority date: 2006-03-07
Filing date: 2006-08-04
Publication date: 2008-11-19
Also published as: JP2009528955A; CA2644692A1; CN101400285A; AU2006339732A1; US20090199719A1; WO2007101355A1

Abstract

The invention discloses a glass vessel for a beverage-making machine, which glass vessel is at least partly of double-walled design. In a first refinement, an inner part (1) projects beyond an outer part (2) which partly surrounds said inner part, with the result that a double-walled lower region (100) and a single-walled upper region (101) with a pouring region (13) arranged therein are provided. In another refinement, the inner part and outer part are connected at their upper edge, and the pouring region is of double-walled design. The invention also specifies a method for producing the vessel.

Description

Double-walled vessel

Technical field of the invention

The present invention relates to a glass container for a beverage maker.

PRIOR ART The so-called "French Press" coffee makers are known from the prior art. These usually have a cylindrical, high glass vessel and a movable therein stamp filter, which can be pressed down via a piston rod in the glass vessel. For the preparation of coffee, coffee powder is added to the vessel and brewed with hot water. The mixture is allowed to stand for a few minutes. Subsequently, the stamp filter is pressed down. By taking the coffee powder to the bottom of the vessel, the stamp filter separates the leached coffee powder from the finished coffee beverage. Similarly, tea, etc. can be prepared instead of coffee.

A disadvantage of such beverage makers is that the prepared hot beverage cools quickly. In addition, there is a risk that the glass vessel breaks through improper handling and thereby exits the hot liquid contained therein and scalds the user. This can have very serious health consequences. Presentation of the invention

It is therefore an object of the present invention to provide a glass container for use in a beverage maker of the type mentioned above, which on the one hand prevents the rapid cooling of the hot beverage, on the other hand offers improved safety in the event of glass breakage. This object is achieved by a glass vessel according to claim 1.

It is another object of the present invention to provide a method for producing such a glass vessel. This object is achieved by a method according to claim 13. Advantageous embodiments are specified in the dependent claims.

The glass vessel of the present invention has at least a double-walled area. As a result, on the one hand slows down the cooling, since the space between the walls acts insulating. On the other hand, the double-walled design offers improved protection against glass breakage. The double-walled area protects the user from escaping liquid should the side wall of the inside or outside part burst. Escaping hot liquid is then retained by the still intact part. This reduces the risk of injury to the user.

US 6,405,892 discloses various double-walled containers for domestic use. For example, a double-walled cup is shown. An inner part is inserted into an outer part. Both the inner part and the outer part a thread for a screw connection is arranged. By means of this screw the inner part is connected to the outer part. The junction of the outer part and the inner part is additionally sealed with a sealing element. The production of such a double-walled vessel is relatively complicated. Particularly elaborate are the production of matching threads, the attachment of the sealing element and the subsequent screwing of the two parts.

This is all the more true if the double-walled vessel is to be made of glass, since glass can be made much more difficult in comparison to plastic. The present invention shows ways to overcome these difficulties.

The glass vessel preferably has an inner part and an outer part which at least partially surrounds it and which are fused together. The inner part and / or the outer part is preferably designed so that it is formed tapering in its upper edge region on the other part. In this way, these two parts merge together without the dimensional accuracy is affected at more remote locations.

The inner part widens preferably in an upper edge region. This facilitates the insertion of a stamp filter.

In a first preferred embodiment, the vessel has a single-walled upper area and a double-walled lower area. As a result, the glass vessel can be produced in a simple manner.

In the single-walled upper area, a spout mold, in particular in the form of an outwardly projecting beak, is preferably formed. This is very easy, because the corresponding area is only single-walled. Because of this spill form, liquids can be removed from the glass vessel in a simple and clean way.

The glass vessel preferably has a circular cylindrical inner surface. The circular cylindrical inner surface is advantageous when the vessel is used as a coffee or tea maker. A stamp filter / filter piston can then be easily inserted into the glass vessel and moved therein. Particularly at the sealing point at the edge of the filter piston and the inner surface, the circular cylindrical inner surface ensures a particularly reliable seal.

In a preferred embodiment, the glass vessel comprises an inner part having a bottom and a circumferential cylindrical side wall which has an upper edge area which releases the upper opening, and an outer part having a bottom and a circumferential cylindrical side wall which has an upper edge area. The inner part is arranged in the outer part such that the upper edge region of the outer part encloses the side wall of the inner part. The inner part protrudes beyond the outer part with its upper edge region and forms the single-walled upper region of the glass vessel.

The arrangement of the inner part in the outer part, the glass vessel can be produced in a simple manner. Since the inner part protrudes from the outer part, the two parts are not connected at their respective upper edges. The connection between the two takes place instead only in the upper edge region of the outer part, wherein the upper edge region of the outer part comes to rest on the peripheral side wall of the inner part. As a result, stresses are avoided, and the dimensional accuracy of the inside of the inner part is very well preserved. Preferably, the inner part and the outer part are exclusive lent by this fusion bond to each other, ie, there is no further connection, for example in the region of the soil.

The bottom of the outer part may have a pressure equalization opening provided with a plug, preferably a polymer, e.g. a drop of glue, is closed.

In order to achieve the greatest possible safety and insulating capability, the glass vessel is designed to be double-walled at least in the area of its side wall, but preferably everywhere. In this case, a particular challenge is to train a pouring aid. This is preferably achieved in that the glass vessel has an inner part and an outer part, wherein in the inner part an outwardly projecting inner spout area and in the outer part a corresponding, also outwardly projecting outer spout area are formed, wherein the inner spout area in the outer spout area protrudes. The inner spout area and the outer spout area are then fused together along a common edge.

The glass container is preferably used in a beverage maker, in particular for coffee or tea, which has a filter piston. This is displaceable in the glass vessel and adapted to retain solids, especially coffee or tea leaves, in a near-bottom region of the glass vessel. The filter piston is preferably connected to a lid for closing the upper opening of the inner part, which may also be double-walled again.

In the inventive manufacturing process, the inner part and the outer part are manufactured separately in a first step. Preferably, at least the inner part is machined to keep tolerances in the inner diameter small, so that a stamp filter can be passed through the inner part unhindered. The outer part may also be machined or blown (mouthed). In a second step, the inner part is inserted into the outer part. The outer part is fused in a third step, at least in an upper edge region with the inner part. Before, in between or after further processing steps can take place.

According to a first variant, in the third step, the outer part is heated in an upper edge region and deformed against a side wall of the inner part, so that the outer part is fused with the inner part in this area. As a result, a single-walled upper region of the glass vessel is formed, which is formed by the upper region of the inner part. In this area, a spout mold is then preferably formed under the action of heat.

During the fusing of the inner and outer parts, the outer part can be held on a glass tube which extends axially away from the bottom of the outer part. The glass tube also serves to equalize the pressure in the space between the inner and outer parts during heating and cooling. The tube is then removed, which can form an opening in the bottom of the outer part. Such an opening may also be present in other manufacturing methods as a pressure equalization opening. In a further step, preferably, this opening in the bottom of the outer part is closed, for example, by adding a liquid and curing polymer in the opening.

If the glass vessel is consistently double-walled, it is difficult to form a pouring aid, since these are both in the Must be formed both inside and in the outer part. One possibility is to form the spout areas in the inner part and outer part separately and then to merge. However, this is difficult due to the large tolerances in the formation of the individual spout areas. It is also possible, but difficult and associated with great tolerances, to form the spout area only after the merger of inner part and outer part. Therefore, it is proposed that initially only in the upper edge region of the outer part before pouring a spout area is formed. The outer part is then fused in its upper edge region, with the exception of the outer spout area, with the inner part. Only then is an inner spout area formed in the inner part such that the inner spout area protrudes into the outer spout area, and the inner and outer spout areas are fused together in a common edge area. As a result, the shape of the outer spout area is fixed from the outset, and this may for example be preformed by machine. The inner spout area can then, as it were, nestle into the outer spout area.

Brief description of the drawings

The invention will be described below with reference to Ausführungsbeispie- len with reference to the drawings. Show it:

1 shows a perspective view of a glass vessel according to the present invention; Fig. 2 is a sectional view taken along the central axis of

Vessel of Fig. 1; FIG. 3 is a sectional view of the vessel of FIG. 1 with a filter piston; FIG. Fig. 4 is a sectional view of the vessel of Figure 1 with a filter piston and a frame with handle. and Fig. 5 is a sectional view of a glass vessel according to another embodiment

Description of preferred embodiments

FIG. 1 shows a perspective view of a glass vessel according to the present invention. The vessel comprises an inner part 1 and an outer part 2.

The inner part 1 is designed substantially cylindrical and comprises a bottom 10 and a circumferential side wall eleventh

In a lower region of the inner part 1, the bottom 10 is arranged. Via a transition 14, which is designed here as a rounded transition 14, the bottom 10 is connected to the side wall 11. The side wall 11 extends perpendicular to the bottom 10 and is cylindrical. In an upper area, the side wall 11 ends with an upper edge 15. The bottom 10 and the side wall 11 define a cavity 12. The cavity 12 serves to receive a liquid. In the upper area, a spout 13 is also formed. The spout 13 is designed so that a drink can be removed as possible without dripping.

The outer part 2 is also designed substantially cylindrical and also includes a bottom 20 and a side wall 21. Via a transition 24, which is configured here as a rounded transition, the bottom 20 is connected to the side wall 21. The side wall 21 extends perpendicular to the bottom 20. An upper molded portion 23 forms an upper end. In this area, the side wall 21 of the outer part 2 is bent toward the inner part. In other Words, the outer part 2 tapers toward the top of the inner part 1. Analogous to the inner part 1, a cavity 22 through the bottom 20 and the side wall 21 is limited.

As can be clearly seen in FIG. 2, the cavity of the dispensing part 2 has an inner diameter which is greater than the outer diameter of the cylindrical side wall 11 of the inner part 1. Furthermore, the inner part 1 has a greater height than the outer part 2.

In the manufacture of the vessel, first the inner part

1 and a blank of the outer part 2 each made in a known manner of glass, preferably transparent glass. The blank differs from the outer part of Figures 1 and 2 in that its side wall is continuously cylindrical, while after the joining of the outer and inner parts of the upper portion 23 is tapered towards the inner part.

The inner part 1 is inserted into the cavity 22 of the outer part 2, which still has the shape of the blank. The inner part 1 is positioned concentrically with the outer part 2. Due to the corresponding diameter ratios, a first intermediate space 30 is formed between the cylindrical side walls 11, 21. Furthermore, the inner part 1 becomes such in the outer part

2 positioned so that the bottom 10 of the inner part 1 does not touch the bottom 20 of the outer part 2 and that an upper portion 101 of the inner part 1 protrudes from the outer part 2 out. Between the bottom 20 of the outer part 2 and the bottom 10 of the inner part 1, a second intermediate space 31 thus forms. The first intermediate space 30 and the second intermediate space 31 merge into one another in the regions of the transitions 14 and 24 and form a continuous intermediate space 3 The gap 3 later serves as thermal insulation.

Since the inner part 1 has a greater height than the outer part 2, the upper region of the inner part 1 projects beyond the outer part 2. Thus, the resulting vessel is double-walled in a lower region 100 and single-walled in the upper region 101.

The outer part 2 is connected to the inner part 1 in the upper region 23 of the outer part. In this case, the upper portion 23 of the outer part is deformed against the cylindrical side wall 11 of the inner part and then fused to the side wall 11. Due to this fusion, the upper portion 23 now has the tapered shape of FIGS. 1 and 2. The connection between the inner part 1 and the outer part 2 is designed airtight.

During the deformation and fusing of the outer part 2 with the inner part 1, the air in the intermediate space 30 is heated by the heating of the outer part 2, so the air expands. About a non-illustrated small, preferably centrally located, opening in the bottom 20 of the outer part, this heated air can escape from the gap 3. This small opening can also be referred to as a pressure equalization opening.

After cooling the vessel, the opening in the bottom 20 of the outer part is closed, e.g. with an adhesive plug or a plug of flexible plastic, e.g. Silicone rubber. This can cause unwanted intrusion

Liquid, such as dishwashing water, are avoided through the opening in the intermediate space 30. The gap 3 can be filled or evacuated with different media. Preferably, the gap 3 is filled with normal ambient air. Alternatively, other gases, for example dry nitrogen, or a liquid can be filled before the closure. In the space may also be a solid, such as an insulating foam or colored particles arranged.

FIG. 3 shows the vessel according to the invention in a coffee maker. For this purpose, a lid 4 is inserted with a filter piston 5 in the vessel. The filter piston 5 comprises a filter plate 50 provided with fine openings and a piston rod 52 connected thereto. With the piston rod 52, the filter plate can be displaced in the cavity 12 within the cylindrical side wall 11. The filter plate 50 extends in the unused state slightly over the inner diameter of the cylindrical inner part 1. In the inserted state, an edge 51 provides for the sealing of an area above the filter plate 50 to a region below the filter plate 50. After pouring coffee powder can then the filter piston 5 are inserted into the inner part 1 and pressed in the direction of the bottom 10. The coffee grounds are separated from the infused Kaffeeflüssigάάt. The coffee grounds are then located between the filter plate 50 and the bottom 10 of the inner part 1. Similarly, use with tea leaves is possible.

Under unfavorable circumstances, there is the danger that when the filter piston 5 is pressed down, the inner part 1 may burst in the lower region. This can happen if, for example, coffee powder is used whose grinding degree is not optimal, and the user actuates the piston rod 52 with great force. If the inner part 1 bursts, a This liquid jet at high speed through the ruptured point in the gap 3 a. This beam can then be retained by the outer part 2. This prevents the user from being injured by the hot liquid jet. Should in the worst case, the outer part 2 burst, the liquid jet enters the environment. However, due to the passage through the inner part 1, the intermediate space 3 and the outer part 2, the liquid jet is weakened to such an extent that the risk of injury to the user is largely reduced or even eliminated. Conversely, the double-walled design also provides improved protection against scalding, if the outer part should be damaged.

An upper part of the lid 4, which protrudes out of the double-walled glass vessel in the inserted state, is also designed with double walls. But it can also be used single-walled lid.

Figure 4 shows the vessel of Figure 3 in addition to a frame 6 and a handle 7. The frame 6 surrounds the vessel around the outer part 2 and is connected to the handle 7. Feet 61 on which the vessel can stand up, the frame 6 are formed. The frame is arranged so that it covers the weld, ie, the point at which the outer part and the inner part are fused together. This protects the one hand, the weld, on the other hand, this is also aesthetically desirable because this seam is not always uniform and not always visually appealing. But it is also possible that the frame is arranged elsewhere. In particular, the frame can come to rest above or else below the weld seam. A handle can also be attached to the vessel in another way, for example by means of a metal band stretched around the upper region of the vessel. A handle can also be formed directly on the outer part or otherwise directly connected to the outer part. For example, a glass handle may be fused directly to the outer part.

An alternative embodiment is shown in FIG. 5. In this variant, the outer part 2 is pulled up to the upper edge of the inner part 1. The inner and outer parts are fused together along their upper edges. The bottoms 10, 20 of the inner part 1 as well as the outer part 2 are slightly inwardly, i. concave, arched. The inner part 1 expands slightly outwards in its upper edge region, that is, the inner diameter of the inner part 1 increases in an upward direction. This makes it easier to insert a filter piston into the vessel.

In the upper edge region of the vessel, a spout area 13 is present as a pouring aid. This is formed by an inner spout area 131 on the inner part 1 and an outer spout area 132 on the outer part 2. Preferably, the outer spout area 132 is formed even before the insertion of the inner part in the outer part, for example by machine or manually by pressing against a mold. Thereafter, the inner part, which still has no spout area, inserted into the outer part. The inner part is fused along its upper edge to the outer part, with the exception of the area in which the outer spout area is present. After that, the inner spout area is formed by heating and deformation on the inner part, whereby it virtually conforms to the outer spout area. The two areas are then also fused, so that inner part and outer part are merged around each other.

The inner part 1 and the outer part 2 have in the above embodiments, a round (circular) cross-sectional shape. The round cross-sectional shape results from the circular cylindrical basic shape. But it is also possible that the outer part and / or the inner part have any cross-sectional shape. However, if the double-walled vessel is used as a cafetiere, it is advantageous on account of the filter plate that the inner part 1 is configured in a circular-cylindrical manner.

In further embodiments, it is also possible that the inner part 1 and the outer part 2 have different cross-sectional shapes. For example, the inner part 1 can assume a round basic shape and the outer part 2 an elliptical basic shape. Square cross-sectional shapes are also conceivable, of course. This can lead to interesting optical effects.

LIST OF REFERENCE NUMBERS

1 inner part

2 outside part

3 space

4 lids

5 filter flasks

6 frames

7 handle

10 floor

11 sidewall

12 cavity

13 sink

14 transition 15 upper edge area

100 lower area

101 upper area

131 upper spout area 132 lower spout area

20 floor

21 sidewall

22 cavity

23 shaped area 24 transition

25 welding site

30 first gap 31 second gap 50 filter plate 51 edge

52 piston rod

61 feet

Claims

claims

1. Glass vessel for a beverage maker, which is open at the top and is at least partially double-walled.

2. Glass vessel according to claim 1, wherein the glass vessel has an inner part (1) and an outer part (2) surrounding this at least partially, and wherein the inner part (1) and the outer part (2) are fused together.

3. Glass vessel according to claim 1 or 2, wherein the glass vessel has an inner part (1) and an at least partially surrounding outer part (2), and wherein the inner part (1) and / or the outer part (2) in an upper edge region to each formed tapering towards the other part.

4. Glass vessel according to one of the preceding claims, wherein the glass vessel has an inner part (1) and an at least partially surrounding outer part (2), and wherein the inner part (1) widens in an upper edge region.

5. Glass vessel according to one of the preceding claims, wherein the glass vessel has an opening-close single-walled upper area (101) and an adjoining double-walled lower area (100).

6. Glass vessel according to claim 5, wherein in the single-walled upper area (100) a spout mold (13) is formed.

7. Glass vessel according to one of the preceding claims, comprising an inner part (1) with a bottom (10) and a circumferential side wall (11), which has an upper opening releasing upper edge region (15); and an outer part (2) having a bottom (20) and a circumferential side wall (21), which has an upper edge region (23), wherein the inner part (1) is arranged in the outer part (2) such that the upper edge region (23 ) of the outer part (2) encloses the side wall (11) of the inner part (1) and the inner part (1) with its upper edge region (15) protrudes beyond the outer part (2) and forms a single-walled upper region (101) of the glass vessel.

8. Glass vessel according to claim 7, wherein the inner part (1) and the outer part (2) by a fusion connection (25) between the upper edge region (23) of the outer part (2) and the side wall (11) of the inner part (1) connected to each other are.

9. Glass vessel according to one of claims 1 to 4, wherein the glass vessel is formed at least in the region of its side wall consistently double-walled.

10. Glass vessel according to claim 9, wherein the glass vessel has an inner part (1) and an outer part (2), wherein in the inner part (1) an inner spout area (131) is formed, wherein in the outer part (2) an outer spout area (132). is formed, and wherein the inner spout area (131) and the outer spout area (132) are fused together along a common edge.

11. Beverage preparators, in particular for coffee or tea, comprising a glass vessel according to one of the preceding claims and a filter piston (5) which is displaceable in the glass vessel and is designed to retain solids, in particular ground coffee or tea leaves, in a region near the bottom of the glass vessel.

12. beverage maker according to claim 11, wherein the filter piston (5) with a double-walled lid (4) for closing the upper opening of the inner part (1) is connected.

13. A method for producing a glass vessel according to one of claims 1 to 9, wherein in a first step, an inner part (1) and an outer part (2) are manufactured separately, in a second step, the inner part (1) in the outer part (2 ) is used, and in a third step, the outer part (2) is fused at least in an upper edge region with the inner part (1).

14. The method according to claim 13, wherein the outer part (2) in its upper edge region (23) heated and against a side wall (11) of the inner part (1) is deformed, so that the outer part (2) with the inner part (1) in This area is fused and a single-walled upper area (101) of the glass vessel is formed.

15. The method according to claim 14, wherein in the single-walled upper region (101) of the glass vessel under the action of heat, a spout mold (13) is formed.

16. The method of claim 13, wherein before joining in the upper edge region of the outer part (2) an outwardly projecting outer spout area (132) is formed, wherein the outer part (2) in its upper edge region with the exception of the outer spout region (132) with an upper edge of the

Inner part (1) is fused, wherein thereafter in the inner part

(1) An inner spout area (131) is formed such that the inner spout area (131) projects into the outer spout area (132), and wherein the inner and outer

Spout area are merged together in a common edge area.