602results about "Packaging protection" patented technology

The utility model relates to the technical field of product packaging, and discloses a multi-head scale combined packaging machine which comprises a support, a weighing bin is connected to the middle of the top end of the support in a penetrating mode, a plurality of partition plates are fixedly installed in the weighing bin, connecting columns are fixedly installed among the partition plates, and a base is arranged at the bottom end of the weighing bin. The middle part of the base is connected with a discharging pipe in a penetrating manner, the weighing stock bin is communicated with the discharging pipe through a plurality of branch pipes, weighing sensors are arranged in areas, which are separated by the separation plates, on the base, and electromagnetic valves are fixedly mounted on the plurality of branch pipes. According to the automatic material packaging machine, a large number of materials can be accurately weighed within a short time, the problems of material blockage and residue can be effectively solved through the unique structural design and an advanced control system, the packaging requirements of packaging bags of different specifications can be rapidly and conveniently met, and automatic, efficient and high-precision material packaging operation is achieved.

Described herein are compositions comprising a polymer / plastic carrier and potassium metabisulphite for imparting antimicrobial activity to a plastic material. Methods for making the same, and uses of the same for microbial control, are also disclosed.

The utility model discloses a packaging bag heat sealing and sealing automation all-in-one machine which comprises a machine frame assembly, a bag opening dust blowing assembly, a heat sealing assembly, an edge folding assembly, a sewing assembly and a conveying assembly, the machine frame assembly is at least provided with a machine frame body, and the machine frame body is provided with a main machine installation position and a height lifting mechanism. A bag opening dust blowing assembly, a heat sealing assembly, an edge folding assembly and a sewing assembly are sequentially arranged on the main machine installation position, and the height of the main machine installation position is adjusted by adjusting the height lifting mechanism. Compared with the prior art, a series of functions of automatic conveying, automatic dust blowing, automatic heat sealing, automatic edge folding and bag sewing, inverted bag conveying and the like of the heat sealing all-in-one machine are achieved, adjustment production of packaging bags with different yields of 10 kg-25 kg can be achieved through the height lifting mechanism, the sealing efficiency and the sealing effect are improved, the labor intensity of workers is reduced, and the production efficiency is improved. The labor cost is saved, and the problems of mechanical damage, chemical corrosion and the like are avoided to a great extent.

The invention relates to the technical field of vegetable cleaning and packaging, and discloses a leafy vegetable cleaning and packaging machine which comprises a machine body, and a root removing system, a yellow leaf removing system, a cleaning system, a water removing system and a packaging system which are sequentially mounted on the machine body from front to back. Root removing, yellow leaf removing, cleaning, water removing and packaging are integrated, full-process automatic operation is achieved, efficiency is greatly improved, manual intervention is reduced, precise operation is ensured, time cost is remarkably saved, processing work is efficient and smooth, the leaf vegetable processing device can adapt to most types of leaf vegetables, and the limiting baffle, the v-shaped groove and the like can be adjusted according to the types and the sizes of the leaf vegetables.

The invention relates to the technical field of rubber pipe steel wire packaging, and provides an automatic packaging machine for rubber pipe steel wires, and the inner wall of a packaging table is provided with a conveying rotating roller used for conducting rotating conveying treatment on pipes. When a tension sensor arranged in the tension adjusting roller senses that the tension is larger than or smaller than a preset value through a pressure sensing module in the tension sensor, the signal transmission module transmits a signal to the motor due to the fact that the signal transmission module is electrically connected with the motor, and therefore when the tension is too large, rapid back adjustment can be achieved to avoid excessive tensile fracture of the wrapping belt, and the service life of the wrapping belt is prolonged. The tension is increased in time to prevent the wrapping belt from loosening, and the technical problem that in the prior art, in the pipe packaging process, due to the fact that the pipe is loosened or the tension is too large or too small when raw materials are packaged, the fitting degree and the packaging tightness of the packaged pipe are affected is solved.

The invention discloses an all-in-one machine for cleaning and packaging green Chinese onions. The all-in-one machine comprises a feeding mechanism, a cleaning box body and a horizontal packaging mechanism which are arranged above a chassis; a conveying mechanism is arranged in the purification box body, and a root cutting mechanism, a leaf cutting mechanism, a peeling mechanism, a cleaning mechanism and a drying mechanism are sequentially arranged in the purification box body in the material flow direction; an output port of the drying mechanism is in butt joint with the horizontal packaging mechanism. The six working procedures of feeding, root cutting, leaf cutting, peeling, cleaning, drying and packaging are integrated on a single chassis, a continuous automatic processing production line is constructed, and a traditional discrete operation mode is changed fundamentally. On-line sensing of diameter changes of green Chinese onions and dynamic matching of clamping force are achieved through self-adaptive swinging of the wobble wheel assembly, the device can be steplessly adapted to different specification ranges of green Chinese onions by combining with precise adjustment of the height of micron-sized leaf cutting driven by a lead screw motor, and the economical efficiency and the market coverage of the device are greatly improved.

The utility model discloses a heating membrane laminating device. Comprising a machine frame, a belt conveyor installed on the machine frame, a pair of U-shaped supporting plates fixed to the machine frame, a pair of sliding blocks arranged in the middles of the two U-shaped supporting plates in a sliding mode respectively, a pair of air cylinders driving the two sliding blocks to slide respectively, a hot pressing roller with the two ends penetrating through the two sliding blocks in a rotating mode respectively, and a first motor driving the hot pressing roller to rotate. The two ends of the tensioning roller are rotationally connected with the two U-shaped supporting plates correspondingly, one end of the unwinding roller is rotationally connected with one U-shaped supporting plate, the rectangular supporting plates are fixed to the fixed rack, the two ends of the rotating shafts penetrate through the two rectangular supporting plates in a rotating mode correspondingly, the second motor drives one rotating shaft to rotate, and the two pairs of belt wheels are arranged on the two rotating shafts in a sleeving mode correspondingly. The two pairs of belt wheels are sleeved with the two belts respectively, and the dust collection assembly is arranged at the tops of the two rectangular supporting plates. The heating film laminating machine has the advantages of being capable of automatically cleaning the surface of the heating film and safely laminating the heating film and the packaging film.

The utility model relates to the technical field of tea production and discloses a packaging machine for tea production, which comprises a conveying belt, a mounting frame fixedly mounted at the top end of the conveying belt, a tea storage barrel fixedly mounted on the inner wall of the mounting frame, a feeding hopper fixedly penetrating through the middle of the top end of the tea storage barrel, and a top cover covering the top end of the feeding hopper. The top cover is driven to cover the top of the feeding hopper, an adsorption hopper fixedly penetrates through the middle of the top cover, the adsorption hopper movably penetrates through the interior of the feeding hopper and the interior of the tea leaf storage cylinder, and supports are symmetrically installed on the two sides of the top end of the tea leaf storage cylinder. At the moment, the suction fan is driven to operate, dust and scraps in the tea leaves in the tea leaf storage barrel can be collected into the impurity collecting box in a centralized mode, and therefore the effective screening effect on the pre-packaged tea leaves is completed, impurities such as dust and scraps in the tea leaves are effectively removed, and the tea leaves are kept pure.

The application relates to a capacitor row box pushing mode, which is characterized by the following steps: step 1: a baffle is pushed to the side of a pushing assembly along the horizontal direction by a first driving assembly; step 2: the baffle is pushed vertically upwards by the pushing assembly; until the baffle completely passes through an assembly table top; step 3: after the baffle completely passes through the assembly table top, a material body is pushed to the side of the baffle along the horizontal direction by a second driving assembly, so that the baffle and the material body are sequentially and intervally combined in layers; step 4: under the pushing action of the second driving assembly, the sequentially and intervally combined material body and baffle continue to move along the assembly table top, and the row box process is completed; the pushing plate in the pushing assembly is periodically moved up and down to vertically push the baffle upwards, and one baffle is pushed out each time. The problems, such as material falling, pinching, paper clamping and low production efficiency, in the prior art during the row box process are solved.

This invention discloses an automatic packaging device for printed materials to prevent bubbling, relating to the field of printed material packaging technology. It includes a chassis and a base plate. A motor is located in the center of the chassis, and a slide groove is located on the right side of the chassis. A sliding plate is engaged within the slide groove, and support pillars are fixedly connected to the four corners of the sliding plate. The base plate is fixedly connected above the support pillars, and a heating plate is fixedly connected inside the base plate. An adsorption component is located on the left side of the base plate, and a sliding frame is fixedly connected to the rear of the base plate. A slide rail is formed in the middle of the sliding frame, and a limiting groove is provided in the middle of the slide rail. A limiting ring is engaged within the limiting groove, and a sliding rod is fixedly connected to the center of the limiting ring. A connecting rod is fixedly connected to the rear end of the sliding rod. This invention can heat the printed materials during packaging to remove excess moisture and clean surface dust, ensuring uniform adhesive application and preventing bubbling during lamination.

Container processing equipment, particularly for processing of food / beverage cans requires filling and sealing. A can seaming system may include interchangeable seaming chucks. A seaming system may be calibrated by sensing a relative position between a seaming spindle and a seaming roller. Conveyor systems may move container axes along a conveyor path irrespective of container size. Conveyors may include container bearers that are mounted for rotational motion allowing containers to enter and / or exit the conveyor. In beverage packaging, inert gas and beverage may be introduced into a container through a single fill conduit. A fill system may include a moving fill conduit arranged to deliver beverage to a lower region of the container. A closure system may include bulk and intermediate closure holders, for feeding closures to a closure head.

A kind of packing assembly, its film bending assembly is used to bend packing film to above placement table, make packing film present C shape, opening is forward;Its film pressing assembly: side lower film plate is provided with two, separately arranged in the left and right sides of placement table, respectively used to be pressed from the bottom edge of the left and right sides of placement table to the side of tray on placement table, or be pressed away from the side of tray on placement table, top pressing film plate is located above placement table, for descending and press to the top surface of tray on placement table, or rise and be away from the top surface of tray on placement table, side upper film plate is provided with two, respectively pivotally connected in the left and right edges of top pressing film plate, for being pressed to the side of tray on placement table, or be pressed away from the side of tray on placement table, front film plate is located in the front side bottom edge of placement table, and it is turned around the front side bottom edge of placement table, for being pressed to the front of tray on placement table, or be pressed away from the front of tray on placement table. Realize automatic around packing film.

A method for improving the efficiency of a pharmaceutical filling line by running the filling line at an increased throughput rate is disclosed. The method involves using glass vials that have been strengthened and coated to reduce the coefficient of friction of the outer surface of the vials with a pharmaceutical filling line set at a rate greater than or equal to 600 vials per minute and running in an efficiency of at least 70%.In other embodiments of the invention, the pharmaceutical filling line may also be provided with a polymer chemical coating at points of contact with the glass vials, thereby further reducing the friction between the vials and the points of contact and the effects of impact of the vials with contact points of the pharmaceutical filling line.

The automatic hafnium tetrachloride packaging equipment comprises a glove box capable of being filled with inert gas, the glove box comprises a transfer cavity and a main cavity, and the transfer cavity is an independent cavity body and is arranged at the feeding end of the main cavity; the transfer cavity sequentially comprises a vacuum cavity and a plurality of cleaning cavities in the length direction of the main cavity, and the tail end cleaning cavity communicates with the main cavity. An independent transfer cavity is arranged, the transfer cavity sequentially comprises a vacuum cavity and a plurality of cleaning cavities in the length direction of a main cavity, and a first air isolating valve, a second air isolating valve and a vacuumizing assembly are arranged, so that a multi-stage material purification buffer area is jointly constructed. A material bottle firstly enters the vacuum cavity after being fed into the transfer cavity through the first conveying piece, and a vacuumizing program is started after the second air isolating valve is closed, so that most of gas and moisture are effectively removed; and then sequentially passing through a plurality of cleaning cavities, repeating a circulating purification process of vacuumizing-inert gas filling in each stage of cavity, and gradually removing oxygen and moisture left on the surface and in the environment.

The utility model relates to the technical field of food processing, and discloses a chicken foot packaging machine which comprises a processing table, a supporting plate and an air cylinder, one end of the air cylinder penetrates through the top of the supporting plate and is fixedly connected with a lifting plate, and the four corners of the top of the lifting plate are connected with second connecting rods in a sliding mode. The bottom ends of the multiple second connecting rods are fixedly connected with heat sealing frames, the outer walls of the multiple second connecting rods are fixedly connected with second springs, the periphery of the bottom of the lifting plate is fixedly connected with extrusion plates, the periphery of the bottom of the lifting plate is fixedly connected with cutting frames, and the left side of the top of the machining table is fixedly connected with a lower die plate. According to the utility model, after a product is pressed by the heat-sealing frame, the vacuum pump is started to extract air in the cavity, then the heat-sealing frame is started to perform high-temperature action on the contact edge for firm adhesion, and the peripheral PE film is cut by the cutting frame through secondary pressing, so that the working efficiency is improved.

The utility model belongs to the technical field of cigarette packaging equipment, and particularly relates to an aluminum-foil paper conveying device of a cigarette packaging machine, which comprises a base, a main air suction channel is transversely arranged on the base, one end of the main air suction channel is communicated with the side face of the base and is communicated with a negative pressure pipeline, a groove is arranged on the base, and the negative pressure pipeline is communicated with the main air suction channel. The groove is communicated with the main air suction channel; the air suction plate is installed on the base, an air suction groove is formed in the air suction plate, and the air suction groove corresponds to the groove; the cover plate is detachably mounted on the air suction plate, and a plurality of air suction holes are formed in the cover plate; the air suction hole is communicated with the groove through the air suction groove; an air suction conveying belt is installed on the air suction plate and provided with a through hole part, and the through hole part is opposite to the air suction holes. The conveying device aims to solve the problems that due to the structural defects of an existing conveying device, disassembly and assembly are troublesome during cleaning, and production efficiency is affected.

The utility model discloses an oriented strand board production board bundling device which comprises a base, a cabinet body is fixedly connected to the top of the base, two cabinet doors are rotatably connected to the interior of the cabinet body, handles are fixedly connected to the exteriors of the cabinet doors, a first base is fixedly connected to the top of the cabinet body, and a second base is fixedly connected to the top of the first base. The top of the first base is fixedly connected with a second base, and the exterior of the second base is fixedly connected with a first motor. By means of the structure, the first motor outside the second base is driven to be matched with the first driving rod to drive the external roller to rotate, so that the rope outside the roller is rotated, an operator binds one end of the rope and the fixed oriented strand board, and therefore binding operation can be completed at a high speed; compared with a manual bundling mode or other non-electric modes, the production efficiency is greatly improved, the production time of a single product is shortened, the rhythm of the whole production process is favorably improved, and the requirement of large-scale production is met.

The present application relates to carbon fiber prepreg processing technical field, specifically to a kind of carbon fiber prepreg automatic packaging integrated machine, it mainly includes, machine body, is provided with straightening mechanism above machine body, straightening mechanism includes extrusion roller one and extrusion roller two above machine body, is provided with brush removal mechanism on one side of extrusion roller one, brush removal mechanism includes brush above extrusion roller one, is provided with dust extraction mechanism on the both sides of brush, dust extraction mechanism includes suction pipe below brush.Through the rotation of rotating plate driven by pivot, rotating plate is moved back and forth by profiled slot with round bar and connecting frame, drives mounting rod, T-shaped block and hinge rod to move back and forth, hinge rod drives moving plate and moving rod to move back and forth, moving rod drives concave plate one and two brushes to move back and forth, two brushes are removed to the dust impurities on the both sides of carbon fiber prepreg surface, so that these unclean substances are not easily sealed with material in packaging, to ensure the quality of final product.

The high-speed twisting machine comprises a twisting machine body, a supporting machine frame is fixedly connected to the bottom of the twisting machine body, a first motor is fixedly connected to one end of the outer side of the supporting machine frame, a rotating shaft is fixedly connected to the output end of the first motor, and a rotating guide cylinder is rotationally connected to one end of the inner side of the supporting machine frame. A conveying belt is arranged on the outer side of the rotating guide cylinder, a collecting box is arranged at one end above the conveying belt, a sliding handle is fixedly connected to one end of the outer side of the collecting box, a discharging pipe is arranged at one end of the twisting machine body, and a direction adjusting mechanism is arranged at the other end of the twisting machine body. The two first motors are started to drive the rotating shaft to enable the rotating guide cylinder to rotate, then the conveying belt runs, the collecting box is driven to move at the bottom of the twisting machine body, soft sweet casings are knotted and then discharged from the discharging pipe, the second motor drives the connecting rotating frame to enable the Teflon hose to rotate around the Teflon hose, left-right swing discharging is achieved, and soft sweet evenly falls into the collecting box. Accumulation is avoided, and follow-up treatment is facilitated.

The application relates to the technical field of packaging and discloses a full-automatic corner cutting machine which comprises a base, four corner cutting devices are arranged on the base, the four corner cutting devices are respectively located at four corners of a product, the corner cutting device comprises a corner cutting baffle structure, a corner cutting cutting structure and a corner cutting pushing structure, the corner cutting baffle structure abuts against one side of a product to be cut, the corner cutting pushing structure pushes the other side of the product to be cut which is perpendicular to the one side, and the corner cutting cutting structure cuts and heats a redundant packaging bag, the one side of the product to be cut is abutted against by the corner cutting baffle structure, then the other side of the product to be cut which is perpendicular to the one side is pushed by the corner cutting pushing structure, finally the redundant packaging bag is cut and heated by the corner cutting cutting structure, so that the edges of the product can be neat, the appearance of product packaging is improved, and the product packaging quality is improved; since the four corner cutting devices are arranged at the four corners of the product, the corner cutting devices can cut the four corners of the product, and the product can be more beautiful.

The utility model relates to a dust collection structure of a gypsum powder production line, and belongs to the technical field of gypsum powder production. Comprising a left dust collecting cover and a right dust collecting cover which are oppositely arranged, the upper portions of the left dust collecting cover and the right dust collecting cover are connected through a top plate, the bottoms of the left dust collecting cover and the right dust collecting cover are connected through a bottom plate, and the top plate, the bottom plate, the left dust collecting cover and the right dust collecting cover define a channel for a roller conveyor to penetrate through. An upper rotary air injection dust removal device is arranged above the conveying path of the roller conveyor and rotationally installed on the inner side face of the top plate, and a driving mechanism for driving the upper rotary air injection dust removal device to rotate in a reciprocating mode is installed on the upper surface of the top plate. The gypsum powder finished product packaging bag stacking and transferring device has the advantages that when a packaging bag filled with gypsum powder finished products passes through the lower portion of the upper rotary air injection and dust removal device, powder on the surface of the gypsum powder finished product packaging bag can be blown away through air sprayed out of the upper rotary air injection and dust removal device, and then stacking and transferring are conducted.

The utility model provides a pearl wool package feeding device which comprises a bottom plate, supporting legs are symmetrically arranged at the bottom of the bottom plate, the telescopic end of a first electric push rod is fixedly connected with a lifting plate, a feeding assembly is arranged, a pearl wool package is arranged above a rotating roller, a third electric push rod is started to drive a sliding frame to move in the direction away from a fixed frame, and the rotating roller rotates. After moving to the position above the pearl wool package, starting a second electric push rod to drive a pressing plate to move downwards, pressing the pearl wool through the pressing plate, controlling a third electric push rod to extend according to the size needing to be cut, and driving the pressing plate to move towards the fixing frame through the third electric push rod; the pressing plate moves to drive the pearl wool to slide on the surface of the rotating roller and move towards the fixing frame. And feeding of pearl wool packages is achieved through mutual cooperation of a third electric push rod and a second electric push rod, size-adjustable cutting is conveniently conducted on the pearl wool packages, the structure is simple, and use is convenient.

The utility model relates to the technical field of sealing machines, and discloses a novel food packaging bag sealing machine which comprises a sealing machine body, and a protection assembly is arranged on one side of the sealing machine body. The protection assembly comprises a fixing frame, the fixing frame is fixedly connected to one side of the sealing machine body, sliding sleeves are slidably connected to the two sides of the fixing frame, threaded pipes are connected to one sides of the sliding sleeves in a penetrating mode, fastening bolts are connected to the interiors of the threaded pipes in a threaded mode, connecting rods are fixedly connected to one sides of the sliding sleeves, and a protection shell is arranged at one ends of the two connecting rods. When the sealing machine is not used, the sealing area of the sealing machine is covered, so that dust and batting are conveniently blocked, the phenomenon that the surface of a packaging bag is stained with dust when the sealing machine is used for sealing the packaging bag due to the fact that the dust and batting adhere to the sealing area is reduced, the sealing quality is improved, and the sealing efficiency is improved. And the protective shell is convenient to disassemble and assemble, so that the protective shell is replaced and maintained.

The invention discloses a cover cleaning device, and relates to the field of packaging machinery. The whole cap cleaning device is of a rotary structure, after a bottle cap enters the cap cleaning device, the bottle cap and the cap dust blowing mechanism can rotate along with equipment, the cap dust blowing mechanism extends into the bottle cap under the guidance of a cam during the period, and clean gas is pressed into the cap dust blowing mechanism through the static electricity generating device and blown into the bottle cap through the double-channel gas rotary distributor. And the negative pressure of the other channel is introduced into the annular dust collection cavity to absorb the waste gas and discharge the waste gas out of the clean area for collection. According to the bottle cap cleaning device, the interior of a bottle cap can be efficiently and comprehensively cleaned, on one hand, uncontrollable deviation of the bottle cap can be effectively avoided, and on the other hand, it can be effectively guaranteed that a whole channel circulation is formed from clean air to gas emission after dust removal; therefore, gas and dust leaving the bottle cap cannot return to the bottle cap and a clean area of the whole equipment. The cleaning device has the advantages of being good in cleaning effect, large in cleaning strength and capable of adapting to high-speed production takt on the whole.

An assembly having a first body coupled to a second body via a hinged connection to rotatably couple the first and second bodies together. The assembly also has a releasable connection releasably coupling the first and second bodies together. The assembly also has a filter coupled to at least one of the first and second bodies and configured to prevent solids from flowing through the filter while allowing fluid flow through the filter. The assembly is configured to be coupled to a dispensing pipe of a dosing device and a fill pipe of a packaging system.

A processing device (1) for objects (2) and a method for processing objects (2) in a controlled environment (3) are proposed, wherein the controlled environment (3) has at least one passage (4) for introducing at least objects (2) which are contained in containers (5) in a first format (6) that forms at least one planar arrangement and / or comprises at least one arrangement of nxm objects (2), where n > 1 and m > 1, wherein the containers (5) are provided in a packaging (7) which remains at least partially outside the controlled environment (3), characterized in that a transfer device (8) for transferring (9) the objects (2) from the first format (6) nxm to a second format (10) oxp, where p = 1 and o ≥ 1, is formed in the controlled environment (3).

The invention belongs to the field of sauce production equipment, and particularly relates to adjustable sauce quantitative filling equipment which comprises a movable frame. A plurality of supporting legs are fixedly connected to the bottom of the movable frame body; the top of the movable frame body is fixedly connected with a pushing frame; two rotating shafts are rotationally connected to the interior of the movable frame body; a conveying belt is driven to rotate through a rotating shaft, a container tank is conveyed to the position corresponding to the end of a material guide pipe, then a sliding plate is pushed through an electric push rod to drive the end of the material guide pipe to descend, the end of the material guide pipe is inserted into the container tank, quantitative filling is conducted on sauce, and the sliding plate is attached to the top of the container tank; according to the quantitative filling device for the sauce, due to the structural design that the container tank is sealed, the function that external dust and other impurities can be effectively prevented from entering the container tank during quantitative filling of the sauce is achieved, and the problem that during quantitative filling, the external dust is likely to be mixed into the sauce, and the sauce is polluted is effectively solved.

The invention relates in particular to a device (10) for dispensing a liquefied fluid (F1) into a container (12). The device (10) has a cooling container (14) for receiving a cooling medium (K1). The apparatus (10) has a liquefying device (26) which is arranged in the cooling vessel (14) for cooling and liquefying a gaseous fluid. The apparatus (10) has a storage container (32) which is connected to the liquefying device (26) for receiving the liquefied fluid (F1) from the liquefying device (26) and which is arranged in the cooling container (14) for cooling the liquefied fluid (F1). The apparatus (10) has a dispensing device (38) for dispensing the liquefied fluid (F1) into the container (12), where the dispensing device (38) is connected to the storage container (32) for receiving the liquefied fluid (F1) from the storage container (32).

The invention relates, inter alia, to a container treatment system (10) comprising a cleanroom (12), at least one device (20, 22, 24) for transporting and / or treating containers, which is arranged in the cleanroom (12), and an air distribution system (30). The air distribution system (30) has an air inlet (32) which is arranged in the cleanroom (12) and an air outlet (44) which is arranged in the cleanroom (12) for delivering a directed cleanroom airflow (R) for cleaning and / or cooling. The air distribution system (30) has a fluid line (34) which connects the air inlet (32) and the air outlet (44) and an air conveying unit (36) which is arranged in the fluid line (34).