Abstract: A stackable box includes a lower part, a first foot strip arranged on an underside of the lower part, a first projection extending from the first foot strip, a second foot strip arranged on the underside of the lower part, a second projection extending from the second foot strip, a lid, a first coupling part arranged on the lid directly above the first projection, and a second coupling part arranged on the lid directly above the second projection. The stackable box has a front and a rear, a distance from the front to the rear defining a longitudinal length of the box. The lid may include a first receiving region proximal to the first coupling part. The first receiving region has a longitudinal length which is greater than a longitudinal extension of the first foot strip. The first receiving region may be arranged in front of the first coupling part.

Abstract: A suitcase for stacking with a further suitcase, comprising a contact surface for stacking the further suitcase, at least one coupling part which can be brought together with a matching coupling part of the further suitcase to form a plug-in connection, wherein the coupling part is aligned such that the plug-in connection to the matching coupling part is formed by displacing the further suitcase along the contact surface. At least one locking element is provided to secure the plug-in connection against being released, wherein the locking element can be displaced from an initial position to an intermediate or end position, and in the initial position is in a receiving region for the additional suitcase, which is used when placing the further suitcase on the contact surface. The invention further relates to an arrangement comprising at least two suitcases stacked one above the other and a method for stacking at least two suitcases.

Abstract: A suitcase for stacking with a further suitcase, comprising a contact surface for stacking the further suitcase, at least one coupling part which can be brought together with a matching coupling part of the further suitcase to form a plug-in connection, wherein the coupling part is aligned such that the plug-in connection to the matching coupling part is formed by displacing the further suitcase along the contact surface. At least one locking element is provided to secure the plug-in connection against being released, wherein the locking element can be displaced from an initial position to an intermediate or end position, and in the initial position is in a receiving region for the additional suitcase, which is used when placing the further suitcase on the contact surface. The invention further relates to an arrangement comprising at least two suitcases stacked one above the other and a method for stacking at least two suitcases.

Abstract: The evaporation air humidifier comprises a housing consisting of an upper part (1) and a lower part (2) forming a water chamber (3). A drive unit (4) with a fan blade (5) is arranged on the upper part (1). An intermediate part (6) is located in the housing and floats on the water with its bottom surface lying on the water surface. The intermediate part (6) is guided by a slide pipe (19) and carries an evaporation mat (7), the lower end (17) of which is always submerged into the water tank (3) to the same length. The water is sucked through openings (15) into the evaporation mat (7), and humidifies the stream of air which passes therethrough in the direction of arrows (30, 31) and is discharged through the outlet openings (9).

Abstract: An air cleaning apparatus comprises a housing that includes four housing parts and a motor unit with an axial fan arranged in the middle zone of the apparatus. The motor unit forms with upper and lower housing parts a single unit. The air is sucked by the motor through a circular air channel. The outer zone of the air channel is surrounded by a multi-layer filter mat in the form of a shell. Along the side surface of the apparatus, air inlet openings are arranged. In the central zone on the upper surface of the cover air outlet openings are provided.

Abstract: A filter for liquids and particularly coffee comprises a container having a planar horizontal base formed with at least one filtrate drainage opening, and on its inner face formed with a plurality of radial ribs and a central support member which together support a generally planar filter element of thin sheet material in spaced parallel relationship to the base. In use the arrangement produces a toroidal circulation of liquid which prevents compaction of the filter cake and reduces clogging of the filter element.