Espresso coffee machine

Abstract

Espresso coffee machine comprising a reservoir for the water (20), a pump (21) for delivering the said water to a boiler (24), a hot water supply unit (2, 102, 122, 4, 304), and filter holder means (1, 301, 3, 103) for housing a portion of ground coffee (16), preferably pre-packaged, and provided with coffee delivery means (201; 203), characterized in that the said supply unit (2, 102, 122, 4, 304) and the said filter holder means (1, 301; 3, 103) are coupled together with a seal and the trajectory of the coupling movement lies on a plane substantially perpendicular to the median plane of coupling of the said supply unit (2, 102, 122; 4, 304) and the said filter holder means (1, 301; 3, 103), the facing surfaces of the said supply unit (2, 102, 122; 4, 304) and the said filter holder means (1, 301; 3, 103) coming into contact only at the time of their coupling.

Description

technical field [0001] The present invention relates to coffee makers, and in particular to coffee makers in which the coffee is introduced in the form of pre-filled cartridges, so-called "filter packs" or similar. Background technique [0002] Until recently, coffee makers were basically designed for professional use, but are now widely used in domestic affairs. In order to make the use of these coffee machines easier and more practical, and to ensure the uniformity of the quality standard of the product (that is, the coffee emitted), pre-filled portions of ground coffee have been provided for many years, which are packaged in paper , plastic, aluminum or other water-permeable containers, the so-called "filter bag". [0003] Coffee makers using this product are really simple to use and provide a coffee infusion whose characteristics depend entirely on the amount of water used; in practice, these steps, such as filter filling and tamping, are Cancellation, the number of op...

AI Technical Summary

Problems solved by technology

[0004] On the other hand, it must be pointed out that more traditional types of coffee makers are not easily adapted to use these filter packs

There are two reasons for this, one is that such filter packs are rarely produced in such a way as to provide a good seal, and subsequently a satisfactory quality coffee infusion, and the second is that even if a seal could be provided, Whereas the relative movement of the parts providing such a seal, namely the filter holder and the device for supplying pressurized hot water, occurs together with the sliding of the associated contact surfaces; this can easily cause deformation of the filter pack and consequently the e

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