JPH0310905Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention includes a coffee storage section in which coffee powder is sealed at the bottom of a hot water reservoir, and the hot water poured into the hot water reservoir is permeated into the coffee storage section. The present invention relates to a coffee filter that extracts coffee liquid by

[Conventional technology]

For example, there is a drip-type coffee filter that has a storage part for enclosing coffee powder at the bottom of the hot water container, and allows the hot water stored in the hot water container to pass through this storage part to obtain coffee liquid directly into a coffee cup. It is known from Publications No. 52-46630, No. 59-40911, etc.

This coffee filter has filters installed above and below the body of the coffee storage section, and the required amount of coffee powder is placed between the filters, and the hot water stored in the hot water reservoir is passed through the filters to extract the coffee components from the coffee powder. It is designed to extract water, and is usually discarded after one use.

These filters can be divided into two types: those in which the coffee storage part is integrated with the hot water container, as seen in the conventional example mentioned above, and those in which the coffee storage part is separate and can be freely attached and detached. In either case, the storage section has a sealed structure to prevent coffee powder from leaking out, and hot water and air can only enter and exit through filters placed above and below.

This conventionally proposed coffee filter is easy to handle because the coffee liquid can be extracted directly into a coffee cup by simply pouring hot water into the water reservoir.
Moreover, it has been put into practical use because it allows you to enjoy the taste of regular coffee, but in actual use, the permeation rate of hot water into the coffee storage part is slow and it takes some time, and the permeating hot water does not interfere with the coffee powder stored in the storage part. Some of the hot water does not permeate the entire body and flows down along the inner wall surface of the body forming the storage section, and continues to flow down through the filter below without becoming coffee liquid, resulting in insufficient filtration. There was a problem that the coffee liquid with the expected concentration could not be obtained.

[Problem that the invention attempts to solve]

The present invention aims to improve this problem in view of the fact that filtration takes time due to the slow permeation rate mentioned above, and in particular, the permeating hot water does not come into sufficient contact with the coffee powder, causing variations in the extraction of the components. It has been researched and developed.

[Means for solving problems]

The filter of the present invention is an improvement of the coffee storage section for storing coffee powder in the drip-type coffee filters that have already been proposed. and an annular obstruction wall is erected along the inner wall surface of the body of the coffee storage section in which coffee powder is sealed, thereby forming an annular groove between the obstruction wall and the inner wall surface of the body. The hot water that flows down along the inner surface of the body is temporarily stored in this groove, and by flowing over the above-mentioned obstacle wall, it is automatically guided to the center of the storage section, thereby dissolving the coffee powder. The purpose is to improve the uniformity by making it possible to extract a sufficient amount of coffee components by making good contact with the coffee liquid, and also by making it possible to extract a coffee liquid having a preset concentration.

Hereinafter, this invention will be explained with reference to illustrative embodiments, and other features will be made clear.

〔Example〕

The embodiment shown in the drawings is an example of a cassette-type coffee filter in which the coffee storage part is molded separately from the hot water container and the coffee storage part is combined with the hot water container during use. ,
Fig. 1 is a central longitudinal sectional front view of the main part, Fig. 2 is a partially cutaway plan view of the main part, and Fig. 3 is a partially enlarged vertical sectional view of the main part showing the inflow state of hot water. .

Reference numeral 1 in the drawing is a coffee storage section formed separately from the hot water reservoir 2, 3 is the body of the storage section 1,
4 is an upper filter stretched over the upper edge of this body, 5 is a lower filter similarly stretched over the lower part of the body, and 6 is coffee powder stored between the upper and lower filters. Incidentally, in the figure, the hot water reservoir 2 is shown with a two-dot chain line together with the coffee cup 7 to distinguish it from the coffee storage section 1 and for clarity.

The coffee storage section 1 shown here is made of synthetic resin, and has a stepped section 8 at the lower end of the body section 3.
A lower filter 5 is stretched over the upper surface of this step. A bottom plate 9 is provided at a narrow interval below this stepped portion so that the entire body forms a dish shape, and a reservoir chamber 10 is provided between this bottom portion 9 and the lower filter 5 for storing filtered coffee liquid. The bottom plate 9 is provided with a small hole 11 through which the stored coffee liquid is dripped.

The upper edge of the storage part, that is, the upper edge of the body part 3, is formed into a horizontal plane by the overhang of the collar 12, and in the center of this plane, a ring-shaped attachment protrusion is provided so as to surround the upper end opening of the body part. 13 is provided in a protruding manner, and the upper filter 4 is stretched through this protrusion.

Reference numeral 14 designates ventilation holes cut into the annular fastening protrusion 13 at intervals. When the upper filter 4 is fixed along the upper edge of the fixing protrusion 13, this vent hole opens laterally and communicates between the inside and outside of the storage section 1.

Reference numeral 15 denotes an obstacle wall raised in an annular shape along the stepped portion 8 provided at the lower end of the body portion 3.

The obstacle wall 15 is spaced apart from the inner wall of the body part 3 and has an annular groove 16 formed therein, and is formed to a height that reaches approximately the center of the height inside the storage part 1, as will be described later. The hot water flowing through the upper filter 4 and the ventilation hole 14 is once passed through the groove 16.
The coffee powder 6 can then be poured over the obstruction wall 15 into the center filled with coffee powder 6.

The coffee storage section 1 constructed in this way has a body section 3 with a bottom formed from synthetic resin, and then a lower filter 5 is stretched along the top surface of the stepped section 8, thereby creating a space between the bottom plate 9 and the bottom section 3. A storage chamber 10 is formed, and then the required amount of coffee powder 6 is filled, and the upper filter 4 is stretched along the fastening protrusion 13 provided on the upper surface of the collar 12 to seal in the coffee powder 6. The section is completed.

Although the filters 4 and 5 may be fixed using an adhesive, in this embodiment they are fixed to the body 3 by heat fusion.

Incidentally, since the coffee powder 6 placed between the upper and lower filters swells with the hot water poured later, a required gap is prepared in advance between the coffee powder 6 and the upper filter 4 to allow air to enter. It turns out.

Now, in actual use, the coffee storage section 1 configured as described above is formed into a cup shape as shown in the figure, and is dropped from above into a hot water reservoir 2 having a cylindrical attachment section 2a at the bottom. It is fitted into the mounting part 2a to complete the coffee filter. Then, this filter is placed on the coffee cup 7 in the same way as a conventional filter, and after completing the setting, hot water is poured into the water reservoir 2 and coffee liquid is extracted.

In the present invention, the hot water poured into the hot water reservoir flows into the storage part 1 through the upper filter 4, similar to the conventional filter, and at the same time, the hot water flows into the storage part 1 through a hole cut into the fastening protrusion 13 along the upper edge of the filter. It also flows through the pores 14 and moistens the coffee powder 6. In conjunction with this inflow of hot water, the air inside the storage compartment escapes outside using the ventilation hole 14 as a priority passage without passing through the narrow pores of the filter 4, and becomes bubbles to fill the hot water in the hot water storage container. It will be released through the.

Similar to this release of air, gas generated when hot water comes into contact with the coffee powder is also released through the ventilation holes 14 without remaining in the storage section 1, thereby helping the hot water to penetrate.

On the other hand, the hot water flowing through the upper filter 4 falls directly onto the coffee powder and moistens it, and the hot water flows down along the inner wall surface of the body, and further flows through the vent hole 14 of the fastening ridge 13. However, the hot water flowing down along the inner wall surface of the body 3 flows into the groove 1 formed by the rising of the obstacle wall 15.
Once stored in 6 and filled here, obstacle wall 1
5 will overflow and flow into the coffee powder stored inside the storage section, moistening it.

The hot water from which the coffee components have been extracted by contact with the hot water, that is, the coffee liquid, is filtered by the lower filter 5, stored in the reservoir 10, and collected through the small hole 11 into the coffee cup 7 received below.

FIG. 4 shows the upper filter 4 in the above embodiment.
A fastening protrusion 13 was provided for fixing the filter, and a ventilation hole 14 was provided therein, but this protrusion was eliminated and the filter 4 directly above the upper edge of the flat body was fixed. This figure shows another embodiment in which ventilation holes 14 are provided by making cuts at appropriate intervals in the upper edge portion.

In addition, 17 in the figure is a bottom plate 9 in order to prevent the reservoir chamber 10 from being crushed due to the lower filter 5 hanging down.
It is a support stand that protrudes from the top.

[Effect of idea]

As described above, the coffee filter of the present invention is constructed such that the obstruction wall 15 provided in the coffee storage section directly directs the hot water that has flowed in through the upper filter 4 and the ventilation hole 14 into the body. 3, reaches the lower filter 5 and prevents the hot water from flowing out without substantially contacting the coffee powder, and directs the flowing hot water to the central part of the storage section filled with the coffee powder 6. Since the contact with the coffee beans is ensured by guiding the coffee beans to the coffee beans, the extraction of the ingredients is extremely effective, and uniform wetting is achieved, resulting in a coffee liquid with a constant concentration.

In the above embodiment, the present invention is applied to the coffee storage section 1.
An example has been described in which a removable filter is used by separately assembling the hot water container 2 and the mounting part 2a, and the coffee storage part 1.
It goes without saying that the present invention can be applied to a filter in which a coffee storage part is integrally formed at the bottom of a hot water container.

Furthermore, in the embodiment described above, the bottom of the body 3 is closed with the bottom 9 to form the reservoir chamber 10 between it and the filter 5 below, but the provision of the bottom 9 is not an essential requirement for the present invention. Instead, the body part 3 is made into a simple cylindrical shape and filters 4 are placed above and below it.
It goes without saying that the coffee storage section 1 may be constructed by extending the coffee storage section 5.

[Brief explanation of drawings]

The drawing shows an example of a removable coffee filter in which the coffee storage part is molded separately from the hot water container and the coffee storage part is combined with the hot water container when in use. Fig. 2 is a partially cutaway plan view of the main part, Fig. 3 is a partially enlarged vertical cross-sectional view of the main part showing the state of inflow of hot water, and Fig. 4 is a front view of the main part. FIG. 7 is a partially enlarged vertical cross-sectional view of a main part of another embodiment. 1... Coffee storage section, 2... Hot water reservoir, 3
... body, 4 ... upper filter, 5 ... lower filter, 6 ... coffee powder, 15 ... obstacle wall, 16 ... groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A coffee container with a filter attached to the upper edge and bottom of the body and a coffee storage section with coffee powder sealed inside is provided at the bottom of the hot water container, and the hot water is stored in the hot water container. In a coffee filter that extracts coffee liquid by passing hot water through a coffee storage part, an annular obstacle wall is erected in an annular shape along the inner surface of the body, and an annular groove is formed between the wall and the inner surface of the body. A coffee filter characterized in that the hot water flowing down along the inner surface of the body is stored in the groove and guided over the obstacle wall to the center of the coffee storage section. (2) The coffee filter according to claim 1, wherein the obstacle wall has a height that does not reach the upper edge of the body. (3) The coffee filter according to claim 1, wherein the obstacle wall stands up from the upper surface of a step provided at the lower part of the body.