Tetra Laval Holdings & Finance Patente

There is described a package forming apparatus (1) comprising a first operative unit (4) and a second operative unit (5) each of which comprises a plurality of operative devices (7) and a conveyor device (8) configured to advance the plurality of operative devices (7). Each operative device (7) comprises a cart (10) moveably coupled to the conveyor device (8) and an operative group (11). Each conveyor device (8) comprises a control unit (12) configured to advance the carts (10) along an advancement path (Q) and a braking device (18) configured to interact with a respective braking pad (19) of each operative device (7) and configured to allow and to impede advancement of the operative devices (7). Each braking device (18) comprises a first plate assembly (20) and a second plate assembly (21) spaced apart from one another, forming a space (22) therebetween and being movable between a release position and a clamping position. The actuator assembly (23) comprises at least one actuator (30) connected to the first plate assembly (20) and configured to induce a movement of the first plate assembly (20). The at least one actuator (30) comprises a piston (31) and a ball joint assembly (35) connected to the piston (31) and the first plate assembly (20).

A method (200) for producing a diary product (P1). The method (200) comprising: feeding (S202) a dairy material (DM) to a first filtration stage (101); filtering (S204) the dairy material (DM), in the first filtration stage (101), into a first permeate stream (P1) and a first retentate stream (R1); feeding (S206) the first retentate stream (R1) to a second filtration stage (102); filtering (S208) the first retentate stream (R1) into a second permeate stream (P2) and a second retentate stream (R2); recirculating (S210) the second permeate stream (P2) by feeding it to the first filtration stage (101); and collecting (S212) the first permeate stream (P1) as the dairy product. The disclosure further relates to a system (100) configured to produce a dairy product.

The present disclosure relates to a method (400) for producing a tea-based beverage precursor (208). The method comprises obtaining (402) brew spent tea leaves (BSTL) (201) from a tea extraction system (102) used in the production of tea. These BSTL (201) are then subjected to a wet grinding process (404) to form a BSTL slurry (704). Subsequently, the BSTL slurry (704) is processed (406) using enzymatic treatment to convert it into the tea-based beverage precursor (208). Related products, processes and processing lines are also disclosed.

The present invention relates to training a machine learning model to predict a relative crack index, RCI, map for a candidate combination of a paperboard patterning design and a paperboard material having a set of paperboard material model parameters, the candidate combination to be used in patterning of paperboard packaging material. The training comprises: generating a training dataset for the machine learning model by, for each training combination of one or more training paperboard patterning designs and one or more paperboard materials having a respective set of paperboard material model parameters, performing a finite element method simulation resulting in a respective training RCI map; and training the machine learning model by adjusting weights of the machine learning model using the training combinations of the training dataset as input and the training RCI maps of the training dataset as ground truth. A training apparatus for training the machine learning model is also presented as well as use of the machine learning model to predict a RCI map for a candidate paperboard patterning design.

A method for monitoring a transversal sealing process 200 involves receiving measurement data 304 from a packaging line 100. A trained machine-learning model 302, which is fed with the measurement data 304, generates a quality indicator 306 that reflects the status of at least one package 102's transversal sealing 104. This approach allows real-time quality control and enhances productivity by identifying potential issues or deviations from the standard sealing process.

The present invention relates to training a machine learning model to predict a relative crack index, RCI, map for a candidate fiberboard patterning design to be used in patterning of fiberboard packaging material. The training comprises: generating a training dataset for the machine learning model by, for each of a plurality of training fiberboard patterning designs, performing a finite element method simulation resulting in a respective training RCI map; and training the machine learning model by adjusting weights of the machine learning model using the training fiberboard patterning designs of the training dataset as input and the training RCI maps of the training dataset as ground truth. A training apparatus for training the machine learning model is also presented as well as use of the machine learning model to predict a RCI map for a candidate fiberboard patterning design.

There is described a method for producing sealed packages (2) containing a pourable product, the method comprises the steps of: a) advancing a web (4) of packaging material along an advancing path (P); b) folding the web (4) into a tube (3); c) filling the tube (3) with the pourable product by means of a filling device (7); d) detecting a deviation or anomaly at the web (4) indicative of the state of the packaging material; e) adjusting the operation of the filling device (7) as a function of the detection.

The present invention relates to a cleaning system (10) for cleaning a filling machine configured to fill packages with a liquid food product. The cleaning system comprises a cleaning module (100), a foam supply module (200), a water supply module (300) and a water pump (400). The water pump is configured to pressurize the water supplied to the cleaning module or to the foam supply module from the water supply module. The cleaning system further comprises a control unit (500) configured to control an operational state of the water pump based on a reading from a water flow meter (310) in the water supply module or on a reading from an air flow meter (230) of the foam supply module. Figure elected for publication: Fig. 1

A computer-implemented method (900) for identifying packages (116) to be discarded and sample packages (302) for quality assessment in a package flow (300) is disclosed. The method comprises obtaining (902) a package ID related to one of the packages of the package flow (300), obtaining (904) sensor data (810) associated to the package ID, applying (906) a multi-output model designed for multitask learning on the sensor data (810), wherein the multi-output model is configured to output a discarding prediction as well as a sampling prediction, forming (908) a decision whether to remove the package from the package flow (300), pull the package from the package flow (300) to conduct quality assessment, or allow the package to proceed in the package flow (300) based on the discarding prediction and the sampling prediction, in case the decision (910) is to remove the package or pull the package from the package flow (300), generating (912) control data (816, 818) reflecting the decision, wherein the control data (816, 818) comprises command signals, and transmitting (914) the control data (816, 818) to a reject mechanism (820) arranged for removing the package from the conveyor system (308) or to a sampling mechanism (824) arranged for pulling the package from the package flow (300) to a quality assessment station (814).

The present invention relates to the use of a paper substrate (11) in a high-quality, barrier-coated paper substrate (10) for providing good toughness, flexibility and oxygen barrier properties to a laminated packaging material and to packaging containers comprising the laminated packaging material. The barrier-coated paper substrate may also provide heat sealing capability to a laminated packaging material comprising it. The barrier-coated paper substrate (10; 23), is suitable in packaging of oxygen-sensitive food products.

Method for closed loop calibration of a digital print module (20), the method comprising: feeding (S2) a printed paperboard web (10) continuously in a machine direction (MD), capturing (S3) actual measured Lab values (32) of a test subsection (12) of the paperboard web (10), wherein the test subsection (12) forms part of a final décor of the paperboard web (10) and of a packaging container being produced by the paperboard web (10), determining (S4) a delta between the actual measured Lab values (32) and a targeted Lab set (31), calibrating (S5) the digital print module (20) based on the delta between the actual measured Lab values (32) and the targeted Lab set (31).

The present invention relates to a spray dryer device (200) with a vessel (202). A spray nozzle (208) is arranged in the vessel (202) for forming a stream of liquid droplets (141) from a liquid material (140). Heated gas is supplied to the vessel (202) to, from the stream of liquid droplets (141), form a particulate material (150) by drying the liquid droplets (141). The device (200) includes a temperature sensor arrangement (120) with spatially distributed temperature sensing elements (122) that sense a spatial temperature distribution at an exterior wall (204) of the vessel (202). A processing device (130) acquires a time series of these temperature distributions and analyzes the time series to determine if fouling (152) of the particulate material (150) has occurred at an inside of the exterior wall (204). If fouling has occurred, the processing device (130) generates a signal indicating a fouling condition within the vessel (202). A method (300) of monitoring a spray dryer device (200) is also disclosed.

A continuous in-line method for manufacturing a laminated packaging material (100), comprising: ink-jet printing (S20) a décor layer (130) on a paperboard layer (110), applying (S30) a transparent layer (140) on the paperboard layer (110), and drying (S40) the décor layer (130) and the transparent layer (140) by exposing the paperboard layer (110) to infrared radiation (IR).

Method for quality inspection of a printed paperboard web (10), the method comprising: feeding (S2) a printed paperboard web (10) continuously in a machine direction (MD), providing (S3) a master image (01a) using a first device (23a), generating (S40) a color managed master image (01b) by performing color management of the master image (01a), capturing (S5) a test image (12a) of a subsection (12) of the paperboard web (10) using a second device (23b), determining (S6) the print quality of the paperboard web (10) by comparing the test image (12a) with the color managed master image (01b).

A method (400) for controlling a hydraulic oil pressure pump (212) for generating a hydraulic pressure in a movement cylinder or an injection cylinder of an injection moulding station (102) of a packaging machine (100) is illustrated. The method comprises obtaining (402) shape data (206) pertaining to a shape of a package (104) produced by the packaging machine (100), determining (404) a setpoint oil pressure value based on the shape data (206), obtaining (406) an actual oil pressure value (218) by using a pressure sensor (312), determining (408) control data (210) pertaining to a speed of the hydraulic oil pressure pump (212) based on the set point oil pressure value and the actual oil pressure value (218), and transmitting (410) the control data to the hydraulic oil pressure pump (212).

A method for control of a plurality of nozzles (22) in an ink-jet print module (20), the method comprising:forwarding (S1) a paperboard web (10) continuously in a machine direction (MD),printing (S2) a décor layer (30) on a first section (11) of the paperboard web (10) using the ink-jet print module (20), andprinting (S3) a control layer (40) on a second section (12) of the paperboard web (10) by activating the plurality of nozzles (22),wherein the first and second sections (11, 12) are distinct from each other.

A method (500) for filling a package (114, 114a-b) with a liquid food product (FP) using a filling device (100) is provided. The filling device comprises a filling pipe (102) having an outlet valve (104) placed in a lower end (106), a pump (108, 108a-b) arranged to feed the liquid food product into the filling pipe (102), and a servomotor (110) for controlling the outlet valve (104). The method comprises placing (502) the package (114, 114a-b) below the filling device (100), feeding (504) the liquid food product (FP) into the filling pipe (102) using the pump (108), opening (504) the outlet valve (104), using the servomotor (110), such that the liquid food product (FP) is allowed to pass the lower end (106) of the filling pipe (102) into an interior space of the package (114), and closing (506) the outlet valve (104), using the servomotor (110), such that the liquid food product (FP) is hindered from passing the lower end (106) of the filling pipe (102) and surrounding air is hindered from being sucked into the filling pipe (102).

A web (10) of a multilayer packaging material (12) that comprises a layer of fibrous material (14), wherein the web (10) comprises a plurality of repeat units (16, 16') successively arranged and continuously connected to each other in a first direction (18), each of the repeat units comprising a plurality of holes (20a-h) through the multilayer packaging material, wherein each of the holes has a base (22a-h), the holes being arranged such that the bases are mutually aligned and extend along a common a line (23), the line extending substantially in a second direction (24) perpendicular to the first direction, the line comprising line segments (26b-h) that extend between a respective pair of the bases (22a-h) to delimit the repeat unit (16) from a successive repeat unit (16'), and wherein, for each repeat unit, the web has at least one cut-out (28-1, 28-2, 28-3, 28-4, 28-4', 28-4", 28-5, 28-6) through the multilayer packaging material, each of the cut-out(s) being provided at a respective line segment (26c, 26g) of said line segments.

A method for quality inspection of a series of printed images, the method comprising: feeding (S2) a printed paperboard web (100) continuously in a machine direction (MD), capturing (S4a) a first test image of a first subsection (110) of the paperboard web (100), capturing (S4b) a second test image of a second subsection (120) of the paperboard web (100), the second subsection (120) being arranged remote from to the first subsection (110), determining (S6) the quality of the series of printed images by comparing the first and second test image with at least one master image.

A continuous in-line method for manufacturing a laminated packaging material (100), comprising:providing a paperboard layer (110),adding (S20) a reflective layer (130)to the paperboard layer (110), said reflective layer (130) being configured to reflect infrared radiation (IR),ink-jet printing (S40) a décor layer (150) such that the reflective layer (130) is at least to some extent arranged between the paperboard layer (130) and the décor layer (150), anddrying (S50) the décor layer (150) by exposing the décor layer (150) to infrared radiation (IR).

A mixing unit (1) comprising: a vessel (2) for containing a product to be mixed; a shaft (4) extending longitudinally inside the vessel (2) and configured for rotating around a rational axis (16) to be used for mixing the product inside the vessel (2), the shaft (4) having a first portion (5) and a second portion (6) separated from the first portion (5), wherein the mixing unit (1) further comprises a flexible member (7) connecting the first portion (5) to the second portion (6) of the shaft (4) for compensating a displacement between the first portion (5) and the second portion (6) due to thermal expansion of the vessel (2).

A scraper assembly (1) for a mixing unit (2) having a vessel (4) with internal walls (8), the scraper assembly (1) comprising an elongated supporting rod (3) configured to be mounted inside the vessel (4) and a scraper body (5) having a first edge (6) and a second edge (7) opposite to the first edge (6), the scraper body (5) being pivotally mountable in a removable way to the supporting rod (3) at the first edge (6) and being configured to scrape the internal walls (8) of the vessel (4) at the second edge (7), wherein the scraper assembly further comprises a spring member (9) fixable to the supporting rod (3) and coupled to the scraper body (5) to make the scraper body (5) spring-loaded.

It is described a conveying device (15) for a web (4) fed along a conveying path (P), comprising a plurality of electroadhesive elements (18) comprising an outer electroadhesive gripping surface (19) configured to adhere to the web (4), wherein at least two electroadhesive elements (18) of the plurality of electroadhesive elements (18) are activatable to generate at least a first electric field (E1) and a second electric field (E2).

The present invention relates to a method for manufacturing a packaging material. The method comprises laminating (206) a bulk layer (20) comprising paper or paperboard or other cellulose-based material to a barrier substrate (30) coated with a protective coating (40).

A delaminable laminated packaging material (10) for packaging of liquid or semi-liquid food products comprises as layers of a layer sequence: - an outermost protective material layer (16); - a bulk layer (11) of paper or paperboard or other cellulose-based material; - a releasable adhesive coating (12) comprising a water-dispersible polymer selected from ethylene-vinyl acetate copolymer, acrylic copolymer, styrene-butadiene copolymer and ethylene-vinyl alcohol copolymer coated onto the inner surface of the bulk layer (11); - a gas barrier layer (14) comprising a barrier substrate (14a) and a barrier material layer (14b), or comprising a gas barrier polymer, the gas barrier layer being bonded to the releasable adhesive coating (12); and - an innermost liquid-tight material layer (19), which is optionally comprised in the barrier substrate (14a). A packaging container comprising the material and methods of making and recycling the material and container are also described.

A computer-implemented method (800) for identifying defects in a package (102a,b) is disclosed. The method (800) comprises placing (802) the package in an apparatus for delaminating the package (102a,b), attaching (804) the first side (302a) to a first clamping device (402a) of the apparatus (400) and the second side (302b) to a second clamping device (402b) of the apparatus (400), tearing (806) apart the weld (104a,b,106a,b) by moving the first clamping device (402a) and second clamping device (402b) away from each other, obtaining (808) a first image (600b), depicting the weld (104a,b, 106a,b), at a first point of time (t1), obtaining (810) a second image (600c), depicting the weld (104a,b,106a,b), at a second point of time (t2), wherein the second point of time (t2) is subsequent to the first point of time (t1), processing (812) the first image (600b) by identifying a sealing line (404)at the first point of time, processing (814) the second image (600c) by identifying the sealing line (404) between the first and second side (302a,b) of the laminate at the second point of time, wherein the first and second image (600b,600c) input to the machine learning model (414) comprise the sealing line (404) identified, applying (816) a machine learning model (414), wherein the machine learning model receives as inputs the first and second image (600b,c), and outputs a prediction of the defects, wherein the machine learning model (414) has been trained by means of reference first and second reference images indicative of the defects for reference packages associated with the first and second reference images.

The present disclosure relates to a method for producing a material for a laminated packaging material, the method comprising the steps of (A1) providing a liquid dispersion comprising cellulosic material; (A2) providing a liquid dispersion comprising at least one carbon-based material chosen from the group consisting of graphite, graphene, graphene oxide and reduced graphene oxide; (B1) mixing the dispersion provided in step A1 with the dispersion provided in step A2 to obtain a mixture; (C1) subjecting the mixture obtained step (B1) to draining of liquid through a porous substrate, followed by an initial compression to obtain a compressed cellulosic material; (D1) subjecting the compressed cellulosic material obtained in step (C1) to pressing to obtain a pressed cellulosic material; and, optionally, a step of (E1) heating the cellulosic material before, during and/or after step (D1); to obtain a cellulose-based sheet material for a laminated packaging material. The present disclosure also relates to a laminated packaging material and to the heat sealing of packages formed from the laminated packaging material, as well as a packaging container for food products and to the use of the laminated packaging material forming a packaging container.

A transversal ultrasonic sealing device (1) for a packaging machine configured to produce packages from a multi-layered packaging material, the device (1) comprising:- a body (3) having opposite lateral walls (3a, 3b);- a plurality of ultrasonic oscillating elements (2) configured to oscillate at ultrasonic frequencies;- a clamping element (6) configured to secure the plurality of oscillating elements (2) to the body (3),wherein the body (3) comprises a coupling region (8) configured to receive the clamping element (6), wherein the coupling region (8) is a reinforced region.

The present invention relates to a quality control apparatus for quality control of packages. The quality control apparatus comprising: a memory storing a machine learning model being trained to identify defects in 3D representations of packages; and circuitry. The circuitry is configured to execute: an image obtaining function configured to, from an image capturing device, obtain a plurality of images depicting a package from a plurality of view angles; a 3D rendering function configured to render a 3D representation of the package having as input the plurality of images; and a quality control function configured to perform quality control of the package by inputting the rendered 3D representation of the package into the machine learning model. A method of generating a training dataset for a machine learning model is also presented.

System (1) of fault prediction for a packaging line (2) including a planar motor system (3); the planar motor system (3) comprises planar base element (10) as well as independently movable carriers (4) configured to manipulate packaging containers (5) and movable over the planar base element (10). The system (1) comprises: a sensory system (6) configured to output data relative to physical quantities associated with operation of the independently movable carriers (4); and electronic processing resources (7) in communication the sensory system (6). The electronic processing resources (7) and configured to: receive the data outputted by the sensory system (6); and process the data outputted by the sensory system (6) to determine the occurrence of a possible anomaly in the operation of the independently movable carriers (4).

An arrangement (100) for folding an ice cream wrapping material (10), comprising a main body (30) having a first end (32) and a second end (34) extending from the first end (32) along a first direction (D1), an edge (39) arranged at the first end (32) to receive the wrapping material (10) moving along a second direction (D2), for forming the wrapping material (10) over the edge (39), the second direction (D2) having an angle (A) to the first direction (D1), a support surface (30') extending from the edge (39) to the second end (34) and configured to receive the wrapping material (10) thereon, and a biasing element (50, 50') arranged at the first end (32) to face the support surface (30') for creating a space (S) through which the wrapping material (10) may pass and configured to apply a force (F) in a direction towards the support surface (30') onto the wrapping material (10).

An arrangement (100) for processing a food product (P) comprises a heat treatment unit (10), a processing unit (20), a valve system (30) configured to fluidly connect the processing unit (20) to the heat treatment unit (10). The valve system (30) includes a non-aseptic inlet (32), a non-aseptic outlet (34), an aseptic inlet (36), an aseptic outlet (38), a processing outlet (22), and a processing inlet (24). A control unit (40) is configured to control the valve system (30) to operate in a first operational mode (O1), in which the product (P) is passed through the heat treatment unit (10) prior to being passed to the processing unit (20), and a second operational mode (O2), in which the product (P) is passed through the processing unit (20) prior to being passed to the heat treatment unit (10).

An ejection arrangement (1) for removing misaligned carton sheets (2) from a conveyor (10) transporting sheets in a specified direction (D). The arrangement includes an ejection opening (11) positioned below the conveying surface and comprises a sensor (30) that generates signals (S1) indicating the presence of carton sheets (2). An air expulsion unit (40), mounted above the ejection opening (11), is configured to direct air bursts (42) onto the sheets. A control unit (50) receives signals (S1), determines sheet misalignment by analyzing rotation or overlap, and activates the air expulsion unit (40) to divert misaligned sheets (2d, 2e) into the ejection opening (11). This arrangement efficiently removes misaligned sheets to ensure smooth conveyor operations.

A support device (20) for use with a membrane filtration apparatus that includes an elongate membrane housing (11). The device facilitates loading and/or unloading of a membrane element (12) through an opening (11C) in an end portion (11A) of the housing (11). It comprises an end flange portion (28) abutting the end portion (11A) and a platform portion (22) projecting from the end flange portion (28) to support the membrane element (12). The device further includes an engagement portion (21) with a first clamp part (26) fixedly connected to the end flange portion (28) and a second clamp part (29) that clamps against a lower side (11H) of the membrane housing (11). The first clamp part (26) includes an adjustment element (37) configured to adjust the vertical position of a support surface (24) relative to the opening (11C) in the membrane housing (11).

There is described a packaging blank (2, 2', 2", 2‴) comprising an intermediate section having an intermediate crease pattern (47) interposed between a top crease pattern (44) and a bottom crease pattern (46) and being configured to define at least a side wall (5) of a package (1, 1', 1", 1‴). The intermediate crease pattern (47) comprises two pairs of front crease lines (52), each pair delimiting a respective front edge panel (53) and two pairs of back crease lines (54), each pair delimiting a respective back edge panel (55). Each pair of front crease lines (52) and/or their imaginary extensions intersect at a first front intersection point (58) and a second front intersection point (59) and each pair of back crease lines (54) and/or their imaginary extensions intersect at a first back intersection point (60) and a second back intersection point (61). The first front intersection points (58) define a first imaginary linear line (L1) and the first back intersection points (60) define a second imaginary linear line (L2). The first imaginary linear line (L1) is interposed between the second imaginary linear line (L2) and the top crease pattern (44).

Screw cap (200), loading piston (300), method for aligning the screw cap (200) and the loading piston (300) in relation to each other and a method for screwing a screw cap (200) onto a threaded neck portion of a packaging container. The screw cap (200) comprises a base portion (210) comprising a top (212) and a bottom surface (214);- an annular portion (220) raised from the base portion (210), the annular portion having an inner (222) and an outer surface (224);- at least one first threaded portion (252) arranged on the inner surface (222) of the annular portion, whereinthe base portion (210) comprises engagement means (240), such that the screw cap (200) is configured to engage a tool (300) with at least one complementary engagement means in a process of screwing the cap onto the container with the complementary threaded neck portion.

The present invention relates to a fluid bed device (100) with a vessel (102) for fluidizing particulate food material (150). The device (100) includes a temperature sensor arrangement (120) with spatially distributed temperature sensing elements (122) that monitor the spatial temperature distribution (TD1-TD7, TD1'-TD7') of the material (150). A processing device (130) acquires a time series (TS, TS') of these temperature distributions, analyzing each sensing element's (122) temporal variation (SV, SV') in temperature readings. If any temporal variation (SV, SV') exceeds a defined threshold (T), the device (100) generates a signal indicating an abnormal condition within the vessel (102). A method (300) of monitoring a fluid bed device (100) is also disclosed.

A piston membrane pump (100) for pumping a liquid, comprising: housing (101) with a chamber (106) having an inlet (107) and outlet (108); a piston (102) in the housing, reciprocating along a longitudinal axis (111) to pump liquid by changing the chamber's volume; a membrane element (103a) sealing the piston (102) to the housing (101); and an actuator (104) driving the piston (102) between a rear (R1) and front end position (F1); and a control unit (105) configured to: control the actuator to drive the reciprocating motion of the piston by using, at different points in time, each of multiple, different sets of end positions (R1,F1; R2,F2; Rn,Fn) for the piston along the longitudinal axis, wherein each set of end positions comprises a rear end position (R1-Rn) and a front end position (F1-Fn) where the distance (L) between the rear end position and the front end position of each set corresponds to a predetermined, full stroke length (L) of the piston.

A method (S100) for operating an actuator (102) in a packaging machine (100) producing food-filled packages is disclosed. The actuator moves a package precursor (106) along a motion axis (M-A) based on a movement profile (200). The method involves: obtaining (S102) package-specific data (400), including package status (402), from a connected database (112); obtaining (S104) a start position (300a-306a, 702a) on the motion axis; determining (S106) an end position (300b-306b, 702b) based on package status (402); defining (S108) a package precursor-adjusted movement profile by scaling (S110) the movement profile according to the start and end positions; and initiating (S112) actuator movement from start to end along the motion axis according to the adjusted movement profile.

There is described a sealing device (14) for sealing a tube of packaging material (3) containing a pourable product to obtain sealed packs (2a) filled with the pourable product, the sealing device (14) including a sealing member (14a) and a counter-sealing member (14b) configured to interact with the tube (3) for sealing a transversal section of the tube (3), thereby defining a transversal sealing band on the tube (3), the sealing device (14) comprising: a support frame (12) for supporting the sealing member (14a); a power transfer system (15) for powering the sealing member (14a) and comprising a conductive member (16) connected to the sealing member (14a) and configured to feed electrical energy to the sealing member (14a); a stop member (17) carried by the support frame (12) and arranged to cooperate with the conductive member (16) for at least limiting a movement of the conductive member (16).