Abstract: The invention relates to a brewing device (1) for a coffee machine, including a brewing cylinder (6) having a cylindrical bore and pistons, such that the brewing cylinder (6) can be closed off to form a brewing chamber. The brewing cylinder (6) and the pistons are held in a frame, and can be displaced relative to each other and driven by a spindle (9). A threaded part (7a) acts together with the spindle, and is disposed on a carrier (7) attached to the brewing cylinder (6). A ground coffee feed device is provided for filling the brewing chamber with ground coffee, and a stripping element (19) serves to strip off the residual coffee grounds remaining on the lower piston (4) after the brewing process. A supporting structure can prevent the spindle from being able to bend under load during the brewing process.

Abstract: A brewing device (1) for a coffee machine includes a brewing cylinder (6) with a cylindrical bore and two pistons (3 and 4), such that the brewing cylinder is able to be closed to form a brewing chamber. The brewing cylinder (6) and pistons (3 and 4) are held in a frame (2). Before the brewing operation, coffee powder is introduced into the brewing chamber. The coffee powder cake (17) ejected from the brewing chamber is stripped off into a collection container (20) via a stripping element (18). Disposed between the stripping element (18) and the collection container (20) is a subcomponent (22) that separates the coffee powder cake (17), stripped off by the stripping element (18), into pieces (17?, 17?) before the coffee powder cake reaches the collection container (20). The coffee powder cakes are stored in the container (20).

Abstract: Described and claimed is a method, in which the state of a mill, which consists of a stator and a rotor and is driven by an alternating current motor, is derived from the rotational speed of the mill work. The rotational speed is measured with the aid of a rotating component connected to the mill work in a torque-proof way, especially with a Hall sensor, which co-operates with a permanent magnet fastened to said component. The determined speeds—normal for a normal operation of the mill and zero or very low in the event a blockage of the mill work—are put in relation to the idling rotational speed, which is also determined and is put in relation to the mains frequency. The determined rotational speeds are stored, and can be displayed. When there is a blockage, an alarm can be sounded.

Abstract: Described and claimed is a method, in which the state of a mill, which consists of a stator and a rotor and is driven by an alternating current motor, is derived from the rotational speed of the mill work. The rotational speed is measured with the aid of a rotating component connected to the mill work in a torque-proof way, especially with a Hall sensor, which co-operates with a permanent magnet fastened to said component. The determined speeds—normal for a normal operation of the mill and zero or very low in the event a blockage of the mill work—are put in relation to the idling rotational speed, which is also determined and is put in relation to the mains frequency. The determined rotational speeds are stored, and can be displayed. When there is a blockage, an alarm can be sounded.

Abstract: A brewing device (1) for a coffee machine comprises a brewing cylinder (6) with a cylindrical bore and two pistons (3 and 4), by means of which the brewing cylinder is able to be closed to form a brewing chamber. The brewing cylinder (6) and the pistons (3 and 4) are held in a frame (2) in a way displaceable relative to each other and are drivable via a drive unit (9, 10). Before the brewing operation, coffee powder is introduced into the brewing chamber. The coffee powder cake (17) ejected from the brewing chamber after the brewing operation is able to be stripped off into a collection container (20) via a stripping element (18). Disposed between the stripping element (18) and the collection container (20) is a subcomponent (22) that separates the coffee powder cake (17), stripped off by the stripping element (18), into pieces (17?, 17?) before said coffee powder cake reaches the collection container (20).

Abstract: The invention relates to a brewing device (1) for a coffee machine, comprising a brewing cylinder (6) having a cylindrical bore and an upper piston (3) and a lower piston (4), by means of which the brewing cylinder (6) can be closed off to form a brewing chamber. The brewing cylinder (6) and the pistons are held in a frame, and can be displaced relative to each other and driven by a spindle (9). The spindle (9) has a trapezoidal thread (8). A threaded part (7a) acts together with said spindle, and is disposed on a carrier (7) attached to the brewing cylinder (6). A ground coffee feed device is provided for filling the brewing chamber with ground coffee, and a stripping element (19) serves to strip off the residual coffee grounds remaining on the lower piston (4) after the brewing process. The spindle (9) having the trapezoidal threading (8) is supported by supporting means (31) on the area opposite the threaded part (7a), and said means can be mounted on the frame (2).