Abstract: The receiving-heating unit contains a sleeve (9) fixed on the housing (2) of the heating element (1) and a sliding insert (5) therein. A sealing ring (11) is arranged in an annular groove between a collar (10) at the lower part of the sliding insert (5) and the front surface of the sleeve (9). There is a switch (8) provided with a switch arm (3) which can be rotated around the axis of the sleeve (9) and the sliding insert (5) against the action of a spring (4) and is provided with means for lifting and lowering the sliding insert (5). Means for holding the mouth part (22) of a bottle (21) is a lever (15) tiltable against the action of another spring (19), having a first arm (23) moved by the mouth part (22) and a second arm (20) locking the switch arm (3).

Abstract: The apparatus according to the invention comprises a housing or frame for receiving the bottle, an element for fixing the bottle, a heating element surrounding part of the bottle and compressing means for compacting the softened bottle, wherein the housing or frame is constructed to receive the bottle with its mouth part upwards, the heating element or the part of the heating element surrounding the bottle is at most 60 mm high, and is arranged around the neck part of the bottle in its starting position and the fixing element is a sealable plug in the compressing means, to be fitted into the mouth of the bottle and having an air channel, the cross section of which is preferably adjustable, preferably with flow control means. The flow control means may be a valve.

Abstract: The apparatus according to the invention comprises a housing or frame for receiving the bottle, an element for fixing the bottle, a heating element surrounding part of the bottle and compressing means for compacting the softened bottle, wherein the housing or frame is constructed to receive the bottle with its mouth part upwards, the heating element or the part of the heating element surrounding the bottle is at most 60 mm high, and is arranged around the neck part of the bottle in its starting position and the fixing element is a sealable plug in the compressing means, to be fitted into the mouth of the bottle and having an air channel, the cross section of which is preferably adjustable, preferably with flow control means. The flow control means may be a valve.

Abstract: A filter for cylindrical of flat filter equipment for the mechanical purification of liquids as described which is assembled of several filter elements (4) arranged one above the other which disclose always gap-shaped filter openings between them and which are fastened by rods led through them and locking flanges. The passage openings for the rods are formed as sleeves (7) to which distance holders (8) belong. The filter elements have trapezoidal cross-section, the outer longer base side (16a) of which, together with the height of a filter opening, make out the height of the sleeve (7).