DK147193B - FILTER EQUIPMENT FOR PREPARING AFFAIRS OF COFFEE OR THE - Google Patents

Description

in 147193

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a filter device for producing coffee or tea flavor extracts and comprising a filter holder for receiving a filter in which the outlet of the filter device is formed as a suction heater and ribs are arranged in the interior of the filter holder for supporting the filter.

From US Patent No. 3,356,010 a filter device of this type is known. It consists of a filter holder, which is formed at the lower end in such a way that it forms here a collecting chamber. By means of a connecting part, this collecting chamber is connected to a suction heater in the form of a bent tube which is outside the filter holder.

The object of the invention is in the simplest possible way to provide a suction heater in a filter device of the type mentioned initially, while at the same time making this filter device extremely easy to clean.

This is achieved according to the invention in that the filter device is characterized in that the outlet of the filter holder is formed by guide ribs, by means of which two duct pieces are limited, the first duct piece being led from a suction opening and upwards immediately above the lowest point of the filter holder, and the second duct piece is led to the outlet opening, which duct pieces, formed by the filters adjacent to the guide ribs, form a suction-raised pipe system.

Hereby is obtained a filter device which provides in use a suction heater of the simplest imaginable configuration. The manufacture of the guide ribs defining the duct pieces which together with a closely adjoining filter form the pipe system which acts as a suction heater, gives almost no additional manufacturing costs compared to previously known filter devices, since it is merely a matter of making a suitable form in which the filter holder can be manufactured. In this connection it is irrelevant whether the filter device is made of plastic material or porcelain. In addition, the filter holder is very easy to clean even within the area where the guide ribs forming the duct system are located.

5 In the following, the invention is explained with reference to the drawing, in which FIG. 1 is a sectional side view of an embodiment of a filter device according to the invention; FIG. 2 the same as FIG. 1 in the direction of arrow VI in FIG. 1 and FIG. 3 is a section along line VII-VII of FIG. First

In FIG. 1-3 shows a filter holder 1 made of one piece of plastic material. This filter holder 1 is arranged in a known manner for receiving a filter not shown. The filter holder 1 outlet 4 is formed by a duct system consisting of inwardly extending guide ribs 15-17 in the filter holder. By means of these guide ribs 15-17, one forms a suction opening 6a, which is above the lowest area of the filter holder 1, upwardly first channel piece 18 and a downwardly leading channel outlet 19a leading to an outlet 20a 19. which, in the form of a rounding 20, enters into the center of the filter holder 1, as can be seen clearly in FIG. 1, is formed slightly higher than the ribs 10 which act as a filter for the filter. The guide ribs 15-17 thus project slightly more into the inner space of the filter holder 1 than the ribs 10. This results in the filter being in each case close to the guide ribs 15-17, especially when the filter operation is initiated, ie. when water is fed into the filter device and the filter becomes softer than in the dry state, and because of the pressure of the water pressure and coffee powder, it is practically close to the guide ribs 15-17. Thereby, the channel pieces 18-19, which are limited by the guide ribs 15-17, form in connection with