Abstract: A coffee maker includes a housing which supports a fresh water container above a receptacle for the coffee. A resistive heating element is mounted in the container to heat the water. The bottom of the container is provided by a downwardly sloping element having an outlet to release heated water to a filter vessel which is releasably connected to the bottom element by a bayonet lock. The filter vessel has an upper rim which is pressed toward an annular shoulder on the underside of the bottom element to create a seal, so that a bubble forms beneath the bottom element when coffee is being brewed. The upper side of the bottom element has arms which mount a temperature-sensitive bimetallic snap element over the outlet. A resilient stopper is mounted on the snap element and is raised from the outlet by the snap element when the water is hot enough for coffee.

Abstract: A process for manufacturing articles of filter paper in which the wet strength of the regions of weak points resulting from mechanical working is increased by the application of a wet strengthener of cross-linked cationic polyalkylenimines. For this purpose, the wet strengthener is applied only to the regions of the weak points after the filter paper has been manufactured. Seams or edge reinforcements are formed by relief printing before the application of the wet strengthener and a heat treatment takes place after application of the thermoplastic wet strengthener to cause the wet strengthener to harden. The application of the wet strengthener is effected in measured doses so that the legally prescribed maximum amounts to be added are not exceeded.

Abstract: A coffee or tea maker has a freshwater receptacle which is connected with a continuous flow heater by a freshwater intake. Heated water leaves the continuous flow heater through a riser. The freshwater intake and the riser are coupled by a conduit in which cold freshwater and heated water admix and in which a thermostat switch is disposed. The latter controls the energization of the heater as a function of the temperature changes of the water mixture in the conduit. An additional heating means arranged in heat exchange relationship with the thermostat switch maintains the heater in a deenergized state after completion of the brewing process. An adjustable throttle valve may be provided for regulating the admission of fresh water into the conduit.

Abstract: A filter vessel arranged to receive a liquid-permeable filter bag for producing a coffee or tea beverage, the filter vessel having, at its bottom, a filtrate outlet in the form of a siphon which prevents dripping after completion of the filtering process.