308results about "Threaded caps application" patented technology

The sewage sampling device comprises a bearing seat, a plurality of test bottles and a sampling module, the plurality of test bottles are arranged on the bearing seat at intervals, each test bottle comprises a bottle body and a bottle cap, the bottle cap is rotatably mounted on the bottle body through a rotary pin and used for opening / closing the bottle body, and the bottle cap extends outwards relative to the bottle body and forms a groove plate; the sampling module comprises a manipulator, a wedge edge rod and a suction pipe, the wedge edge rod and the suction pipe are arranged in parallel and are respectively connected to the manipulator, the wedge edge rod vertically extends downwards relative to the suction pipe and forms a pushing part, and the pushing part is matched with the groove plate; when the manipulator simultaneously drives the wedge edge rod and the suction tube to vertically move downwards, the wedge edge rod can push the groove plate through the pushing part so as to drive the bottle cap to open the bottle body; the straw can be inserted into the bottle body in the opened state. Therefore, bending deformation of the suction pipe is effectively avoided, the bottle cap is driven to reset through the rotary pin, automatic closing of the bottle cap after sampling can be achieved, and the lasting sealing performance of a test bottle is guaranteed.

The present application relates to the technical field of sample pretreatment automation, and discloses a system of a full-automatic sampling tube cap screwing and pipetting workstation and a running method thereof.The system comprises a motion point definition module, a cap screwing adaptation identification module, a label scanning module, a pipetting planning and execution module, a cap screwing torque calling module and a real-time torque acquisition module.The system realizes continuous scanning and reliable identification of the cap profile in the motion state through a dynamic coordinate system and key motion points, dynamically calls matched torque parameters to execute cap screwing according to the identification result, and simultaneously acquires real-time torque data.The system synchronously completes sample label information analysis, pipetting path planning and pressure monitoring.The scheme realizes adaptive perception and closed-loop cap screwing control of the cap state, and improves the robustness of cap identification, the consistency of cap screwing action and the reliability of the overall process.

Closure devices and kits allow closure of an open-ended container and provide a visible indication of closure torque. The closure device will include an outer cap defining a torque indicator window, an inner cap nested within the outer cap and a torque indicator disc positionally fixed to an upper surface of the inner cap and having at least two different indicia regions angularly adjacent to one another. The outer and inner caps are in mechanical interference fit with one another such that turning movement applied to the closure device allows the outer and inner caps to be turned as a unit and threadably coupled onto a threaded container until the inner cap is frictionally engaged with an edge of the container. Thereafter, continued turning movement of the outer cap relative to the inner cap causes angular displacement of the indicator window relative to the torque indicator to thereby provide a visible indication through the indicator window of an indicia region indicative of sufficient closure torque.

The invention discloses a beverage filling production line, and particularly relates to the technical field of beverage production, the beverage filling production line comprises a conveying part, the conveying part comprises two conveying side frames, a conveying roller is rotatably mounted between the conveying side frames, and the outer side of the conveying roller is movably sleeved with a conveying belt; the beverage filling production line comprises a conveying side frame, a plurality of installation supports are fixedly installed at the top end of the conveying side frame, limiting side plates are fixedly installed on the installation supports, a plurality of filling bottles are arranged between the limiting side plates and placed on the upper surface of a conveying belt, and a filling assembly is fixedly installed at the top end of the conveying side frame. Through the arrangement of the filling assembly, automatic beverage filling operation can be conducted on a set of filling bottles, the beverage filling efficiency is improved, the protection part is used in cooperation to prevent beverage liquid from dripping on the conveyed filling bottles or the conveying part to cause pollution, follow-up cleaning is reduced, and therefore the overall beverage filling efficiency is improved.

This invention discloses a miniature canning and conveying device, comprising a conveying assembly, a capping assembly, a cap transfer assembly, a guardrail assembly, a filling assembly, and a sterilization assembly mounted on a substrate. The conveying assembly has an inlet end, an inlet conveying end, an outlet conveying end, and an outlet end, with the inlet and outlet conveying ends conveying in opposite directions. The capping assembly is positioned above the inlet and outlet conveying ends. The cap transfer assembly is positioned between the inlet and outlet conveying ends. The guardrail assembly is laid between the inlet and outlet conveying ends, forming a filling and inoculation station, a sterilization station, and a channel. The filling and sterilization assemblies are respectively positioned at the filling and inoculation stations and the sterilization station. The guardrail assembly includes a bottle pushing component. This invention enables the filling and inoculation of the medicine inside the isolator from outside the isolator, preventing contamination of the internal environment of the isolator and leaks due to manual operation.

The invention belongs to the technical field of photoresist sub-packaging, and discloses photoresist automatic canning equipment which comprises an equipment body, a roller line module, a cover opening and locking module, a filling module and an air return system, the equipment body adopts closed design, and a cover opening and locking area and a filling area are arranged in the equipment body; the roller line module extends to the equipment main body to be arranged, passes through the cover opening and locking area and the filling area, and is used for bearing and conveying a photoresist container; the cover opening and locking module is arranged in the cover opening and locking area and is used for opening and taking away a cover body of the photoresist container or installing and locking the cover body of the photoresist container; the filling module is arranged in the filling area and is used for injecting a set volume of photoetching liquid into the photoresist container; the air return system is used for forming a clean air flow field in the equipment body, and the cleanliness of the filling area is guaranteed. According to the full-automatic filling machine, full automation of cover opening, filling and cover locking is achieved, the safety and cleanliness of the filling process are improved, and the filling efficiency and the product quality are effectively improved.

The utility model discloses a bottle body pressing anti-rotation device, and relates to sealing equipment in the packaging field. The cap screwing device is simple in structure, can adapt to bottles of different structures and different characteristics, can stably hold the bottles in the cap screwing / unscrewing process, and plays a role in rotation prevention. The bottle body pressing anti-rotation device is installed on a rotating shaft of the cap screwing machine, a star wheel is fixedly installed on the upper portion of the rotating shaft, a fixing frame is fixedly installed in the middle of the rotating shaft, a cam is fixedly installed on the lower portion of the rotating shaft, a plurality of notches used for containing bottles are formed in the star wheel, and limiting steps are arranged in the notches. The cam is annular, and the upper surface of the cam arches upwards at the cap screwing station; the bottle body pressing anti-rotation devices correspond to the notches in the star wheel in a one-to-one mode, and each bottle body pressing anti-rotation device comprises a bottle support, a fixing base, a compression spring, a guide column and a rolling wheel. According to the method, the problem that tinplate bottles, thin-wall bottles and printing flower bottles cannot effectively restrain rotation is solved, and the method for preventing rotation by greatly increasing friction resistance without damaging bottle bodies is provided.

Closures (1) with a tamper evidence feature (5) that is reshaped to connect it to the container neck (2) are disclosed. Methods and systems (8) for carrying out the methods, and to mold stacks (102) for making the closures are also disclosed. The tamper evidence feature can be a band (5), a portion (505) of a cylindrical skirt (504) or a panel (705) formed in the cylindrical skirt (704). The application of heat may deform the band (5) inwardly to create a lip (52) for engaging a flange (20) on the container neck (2), or it may weld the tamper evidence feature (305) to the flange (220).

The invention relates to a production line and a station distribution method thereof.The production line comprises a conveying mechanism for conveying objects and a plurality of production mechanisms for machining the objects, and the production mechanisms are used for machining the objects on different conveying lines and connection stations; the ratio of the number of objects processed by a single first production mechanism at a time to the number of objects processed by a single second production mechanism at a time to the number of objects processed by a third production mechanism at a time is larger than or equal to 1, and the ratio is larger than or equal to 2 when set conditions are met. The longest-time-consuming production mechanism in all procedures is separated from other production mechanisms, the other production mechanisms machine objects on different conveying lines, through stepping movement of the conveying lines, the production mechanisms work many times to complete the machining amount the same as that of the longest-time-consuming production mechanism, the occupied area of the production line is reduced, and meanwhile the production efficiency is improved. And the positions of the production mechanisms can be reasonably arranged according to the sequence of production procedures.

The utility model relates to cap screwing equipment technical field provides a carbon powder bottle packing cap screwing equipment with positioning structure, including work table, the middle part of work table (1) top is provided with cap screwing structure, and the cap screwing structure includes cap screwing subassembly, clamping assembly and synchronous assembly, in the utility model, the bolt is extracted from the slot, and the clamping rod is pushed, and the two connecting blocks are moved, and the connecting block of serious wear is removed from the push -pull block, and the other connecting block moves to the push -pull block, and the connecting block movement drives the clamping rod to move, and the clamping rod drives the synchronous board to move in the replacement sliding slot, and the connecting block of serious wear is located at the inner wall of support frame, and the extracted bolt is inserted into the slot that is pasted with the support frame, thereby the synchronous board is fixed, and the connecting block position that is pasted with the push -pull block is fixed, and the second cylinder can be started to continue to push the clamping block clamping work, and the staff removes the clamping cover from the limiting sliding slot, and the mounting plate is extracted from the mounting groove, and the clamping block is disassembled.

The application relates to the technical field of cap screwing machines, and provides a cap screwing machine gripper, which comprises a mounting base, a rotating shaft rotatably connected to the mounting base, a driving piece arranged on the mounting base and used for driving the rotating shaft to rotate, a cap screwing cylinder arranged below the rotating shaft, a pneumatic clamping jaw arranged below the cap screwing cylinder, and a gas supply pipe used for supplying gas to the pneumatic clamping jaw, a protection mechanism is arranged outside the gas supply pipe, the protection mechanism comprises a bellows sleeved outside the gas supply pipe and a fixing assembly used for mounting the bellows to the gas supply pipe. The application has the beneficial effect of reducing the falling phenomenon of the gas supply pipe and making the equipment more convenient to use.

The invention discloses a multipurpose cover opening and closing device for a shielding tank, and relates to the technical field of shielding tank opening, which comprises a rack, a lifting driving mechanism, a lifting frame, a positioning ring, a rotary driving mechanism and a claw head assembly, the lifting driving mechanism is arranged on the rack; the lifting frame is connected with the lifting driving mechanism and is driven by the lifting driving mechanism to do lifting motion; the positioning ring is fixedly connected to the bottom of the lifting frame and is used for radially positioning the shielding tank body; the rotary driving mechanism is mounted on the lifting frame; the claw head assembly comprises a transmission shaft, a switch cover claw head and an elastic pressure applying part; the transmission shaft is in transmission connection with the rotation driving mechanism. The cover opening and closing claw head is connected to the bottom end of the transmission shaft. The elastic pressure applying part is used for providing elastic force tending to move downwards for the switch cover claw head. According to the cover opening and closing device, through cooperation of lifting and rotating motion and stable contact guaranteed by the elastic pressing part, whole-process automation of cover opening and closing operation of the shielding tank is achieved, and operation safety, precision and efficiency are remarkably improved.

The present invention particularly relates to a rotating apparatus for a container processing plant. The rotating apparatus includes a support frame having a notch and an annular lubricant channel surrounding the notch. The rotating apparatus includes a rotor plate arranged in the notch for rotation relative to the support frame, and the rotor plate has an annular collar extending from above into the lubricant channel.

This invention relates to the field of bottle cap orientation adjustment technology, specifically to a bottle cap orientation adjustment device and method. The adjustment device is used to adjust the orientation of bottle caps with straws conveyed on a conveying mechanism, ensuring that the caps face the same direction. The conveying mechanism includes a conveying channel that conveys the bottle caps along an arc-shaped trajectory. This invention adjusts the orientation of the bottle caps during the conveying process by setting elastic mechanisms and adjustment mechanisms on both sides of the conveying channel along the arc-shaped trajectory. This ensures that after adjustment by the adjustment mechanism, all bottle caps rotate at different angles, achieving uniform orientation adjustment and avoiding missed adjustments. Preferably, the elastic mechanism rubs against the straw, causing the straw to rotate and drive the cap to rotate, thus completing the orientation adjustment without the need for an additional rotating device. This solution differs from the techniques in the prior art, enabling continuous adjustment of bottle caps during conveying.

The utility model belongs to the technical field of filling equipment, and particularly relates to a cap screwing gripper of a filling machine for producing single-walled carbon nanotube slurry, which comprises a hollow connecting rod and a cap screwing gripper, the adjusting piece is connected with the air cylinder through a piston rod; the connecting arms are circumferentially and symmetrically hinged to the lower edge of the connecting rod, and the adjusting part is located in the middle of each connecting arm; two sides of the upper parts of the supporting claws are respectively hinged with the adjusting piece and the connecting arms; the air cylinder is suitable for driving the adjusting piece to move in the axial direction of the connecting rod. When the adjusting piece moves upwards, the adjusting piece acts on the hinge point of the supporting claw through traction, so that the supporting claw is folded inwards to be meshed with the outer wall of the internal thread screw cap. When the adjusting piece moves downwards, the lower edge of the adjusting piece extrudes the guide inclined face of the supporting claw, so that the supporting claw expands outwards, and the inner wall of the external thread screw cap is supported.

The utility model belongs to glass bottle sealing equipment technical field, concretely relates to a screwing machine head of cap screwing machine. A screwing machine head of cap screwing machine, including main body cylinder, the lower position of main body cylinder is equipped with telescopic ring, and the lower end of telescopic ring and main body cylinder is telescopic type connection, the lateral wall of main body cylinder is equipped with inlet pipe, the inside of main body cylinder is equipped with a plurality of L-shaped supporting legs, and L-shaped supporting leg is evenly arranged in annular array, the inner wall of main body cylinder is equipped with a plurality of long holes, and L-shaped supporting leg and a plurality of long holes are one to one, and the middle segment position of L-shaped supporting leg is articulated in long hole, and the end of L-shaped supporting leg is connected with reset spring no. One, and the other end of reset spring no. One is connected in the cylinder wall of main body cylinder, the upper end of main body cylinder is connected with telescopic cylinder, and the telescopic type nested connection between telescopic cylinder and main body cylinder is telescopic type nested connection, and reset spring no. Two is arranged between telescopic cylinder and main body cylinder, and the screwing rod is penetrated in telescopic cylinder, and the screwing rod is penetrated into the inside of main body cylinder.

The utility model discloses a multifunctional cap opener for a biological experiment, which is adaptive to opening and closing requirements of an EP tube, a centrifugal tube, a reagent bottle and a PCR (Polymerase Chain Reaction) row tube by integrating a slit, a notch, a gradually-changed groove and an arch-shaped edge structure. The design of the asymmetric tooth-shaped protrusions and the lever is adopted, the operation intensity is remarkably reduced, and the light weight (smaller than 70 g) and the low cost are achieved by combining the hollowed-out part and the ergonomic holding part. The tool is suitable for high-flux experiment scenes.

The utility model relates to the technical field of cap screwing machine conveying, and discloses a compression-resistant and wear-resistant cap screwing machine conveying device which comprises a handle, the lower surface of the handle is fixedly connected with a first supporting column, the outer wall of the first supporting column is fixedly connected with a first protective shell, and the inner wall of the first protective shell is slidably connected with a long rod. A first spring is arranged on the outer wall of the long rod, the outer wall of the long rod is arranged on the outer wall of a first supporting column, the outer wall of the first supporting column is rotationally connected with a second protection shell, the outer wall of the first supporting column is rotationally connected with a shell, and the outer wall of the first supporting column is fixedly connected with a rotating rod; and the inner wall of the rotating rod is fixedly connected with a connecting rod. According to the bottle cap replacing device, the handle is rotated and the long rod is pressed, the handle rotates to drive the first supporting column and the long rod to rotate, the first supporting column drives the rotating rod to rotate in the rotating process, the rotating rod rotates to push the connecting rod to drive the second supporting column to move to push the shell to extrude the supporting block, and the effect of rapidly replacing and placing the bottle cap is achieved.

An apparatus for securing a cap on a cylindrical container includes: a stage for separately receiving a cap and a container; an elevator movable upwardly away from the stage and downwardly toward the stage; and a cap holding assembly mounted on the elevator. The cap holding assembly comprises: a capture member platform, the capture member platform including a capture unit configured to capture the cap; at least one extendable member extending through the capture member platform, the at least one extendable member movable from a home position with the extendable member above a center of the cap captured by the capture unit and an engagement position with the extendable member engaging the center of the cap and urging the center of the cap downwardly relative to an outer sidewall of the cap; and a claw member attached to the capture member platform that is movable between an unengaged position, in which the claw member is not positioned to engage the cap, and an engaged position, in which the claw member is positioned to engage a lower edge of the cap.

The utility model relates to the technical field of automatic filling, and discloses an automatic cap screwing device of an automatic filling machine, which comprises a bottom plate, an electric sliding rail is arranged on the inner wall of the bottom plate, a sliding block is mounted on the inner wall of the electric sliding rail, four clamping blocks are slidably connected to the top of the sliding block, and the bottom ends of the four clamping blocks are connected with the inner wall of the bottom plate through adjusting assemblies. And a supporting frame is slidably connected to the top of the bottom plate, a sliding frame is fixedly connected to the inner wall of the supporting frame, a connecting block is fixedly connected to the inner wall of the sliding frame, and a connecting ring is rotatably connected to the inner wall of the connecting block. According to the bottle cap screwing device, the connecting rod is pulled out of the limiting groove by grasping the fixing inserting block, the connecting rod is clamped on the connecting block after being rotated by a circle, the screwing ring with the adaptive size is inserted into the connecting ring after being taken down and replaced, and the screwing ring is fixed, so that the bottle cap screwing device can be used for screwing bottle caps with different sizes.

The invention particularly relates to an automatic rotating and aligning capping machine for a tank body and a tank cover, which comprises a rack and a tank cover feeding machine, the rack is provided with a tank cover conveying line and a tank body conveying line, and the rack is provided with an adsorption transfer mechanism above the tank cover conveying line and the tank body conveying line. A spiral feeding assembly and a tank body aligning mechanism are sequentially arranged on the rack from the feeding end to the discharging end of the tank body conveying line, and a tank cover aligning mechanism is arranged on the portion, between the tank cover conveying line and the tank body conveying line, of the rack. The automatic assembling machine has the following beneficial effects that automatic color code alignment can be carried out on the tank body, automatic groove alignment can be carried out on the tank cover, transferring and assembling of the tank cover are achieved on an original station after the tank body is aligned, the occupied space of the equipment is relatively small, the machining efficiency is high, and the assembling yield of the tank body and the tank cover with the relatively small diameter is high.

In a hand-held capper / decapper device, cap drivers in an array are driven by an array of rotary motors that drive the cap drivers in forward and reverse rotary directions to cap and decap caps from threaded receptacles. A common linear drive drives ejector pins through the centers of cap drivers to eject caps from the cap drivers. Single button operation is enabled by a controller that responds to press and release of a control button to alternate between decap and cap functions. The cap function finishes with ejection by extension of an ejector pin. An ejector button may also be provided for ejection without rotation of cap drivers. The cap drivers float against compression springs that apply axial force to the cap drivers. Ejection of the caps is staggered to reduce force required. Replaceable cap drivers designed to corresponded to cap designs are supported in a removable cartridge that is retained on a hand-held housing by magnets.

A cap screwing machine with a two-way adjusting type conveying device comprises the two-way adjusting type conveying device and a four-axis multi-specification cap screwing device, the two-way adjusting type conveying device comprises a conveyor fixedly installed on a rack, a guide rail is arranged on the portion, below the conveyor, of the rack, and transverse sliding blocks are arranged at the two ends of the guide rail; a movable seat is arranged between the corresponding transverse sliding blocks, a nut seat is arranged in the middle of the movable seat, a two-way threaded rod is connected between the nut seats at the two ends, and the four-axis multi-specification cap screwing device is installed over the bottle arranging and conveying mechanism through a vertical support and comprises a square frame body, four universal couplings and four cap screwing wheels. A motor is mounted on a top plate of the square frame body, a driving shaft of the motor is connected with a four-shaft speed reducer, and four universal couplings are connected with four output ends of the four-shaft speed reducer; the cap screwing machine has the advantages of being convenient and fast to adjust and operate and high in adjusting precision, meanwhile, the phenomenon that the bottle cap screwing force is too large can be avoided, and the cap screwing packaging quality can be improved.

This invention relates to the field of automated packaging and anti-counterfeiting structure assembly technology, and discloses a transparent packaging box with an anti-counterfeiting lock and a fully automated packaging method. The fully automated packaging method includes pre-assembly of components, filling and capping, initial assembly of the bottle body, top cap gripping, visual guidance, and uniaxial pressing steps. In the top cap gripping process, the clamping component only grips the upper half of the outer wall of the transparent box body symmetrically at multiple points, physically cutting off the path of mechanical clamping force transmitted to the anti-counterfeiting flap below the anti-counterfeiting pull ring, thus avoiding the weak anti-counterfeiting structure from being accidentally broken under pressure during circulation. In the closing and pressing process, the physical rigidity formed by the bottom edge of the transparent box body and the limiting step surface of the upper shell of the base provides mechanical blocking and limiting for the assembly pressing stroke, ensuring that the first biting tooth of the anti-counterfeiting lock body smoothly engages in the bottom groove to complete self-locking, avoiding overload during assembly that could cause the outer parts to collapse, thus solving the technical problems of easily damaged anti-counterfeiting parts and incomplete pressing in automated assembly.

The utility model discloses a cover locking device for lip gloss production, which belongs to the technical field of lip gloss production and comprises a support component, a lifting rotating component is fixedly mounted at the top of the support component, a chuck component is fixedly mounted below the lifting rotating component, and a storage component is arranged below the chuck component. A horizontal cleaning device is arranged on the outer side of the storage assembly; through the arrangement of the horizontal cleaning device, a worker can adjust the inclination angle of the structures such as the object placing assembly through the cooperation of the structures such as the rotating block and the gradienter when needed, so that the structures such as the object placing assembly can be kept horizontal under the conditions that the structures are located on the inclined ground and the like; and a worker can clean the chuck assembly, the storage assembly and other structures to a certain extent through cooperation of a draught fan, a spray head and other structures when needed, so that the difficulty of cleaning work is reduced, the labor burden of the worker is relieved, and then the working capacity of the device is improved.

The utility model provides a bottle cap screwing device for a grinding bottle, and belongs to the technical field of grinding devices. The bottle cap screwing device is used for pressing and rotating a bottle cap of a grinding bottle and comprises a bottle cap clamping device, a rotating mechanism and a lifting mechanism. The bottle cap clamping device comprises a pressing plate and two clamping plates arranged on one side of the pressing plate in a spaced mode. A containing space used for containing a mounting rod on a bottle cap is defined by the two clamping plates and the pressing plate, and the two clamping plates are used for abutting against the two sides of the mounting rod correspondingly. The rotating mechanism is connected with the bottle cap clamping device and used for driving the bottle cap clamping device to rotate around the center axis of the bottle cap. The lifting mechanism is connected with the rotating mechanism and used for driving the rotating mechanism and the bottle cap clamping mechanism to ascend and descend. According to the bottle cap screwing device, the bottle cap can be pressed down and rotated, the bottle cap screwing device is suitable for a grinding bottle which can be opened and closed through pressing down and rotating, and the bottle cap of the grinding bottle can be screwed easily, conveniently and efficiently.

The invention discloses a collection device, and relates to the technical field of collection devices, the collection device comprises a pipettor and an objective table, the upper end face of the objective table is fixedly provided with a placing rack, the upper end face of the placing rack is provided with a placing notch, the inner wall of the placing notch is rotatably provided with a plurality of rotating wheels, and the upper end face of the objective table is provided with a labeling mechanism used in cooperation with the placing notch; a lateral notch is formed in the side, away from the labeling mechanism, of the containing frame and penetrates into the containing notch, and a driving mechanism used in cooperation with the containing notch is arranged on the objective table. When the device is used, a worker does not need to label the sampling pipe, and the device is convenient to use.

The utility model provides a pressure extension tube end cover automatic screwing device which is characterized in that the pressure extension tube end cover automatic screwing device comprises an end cover machine frame (4), an end cover translation material taking assembly (401), an end cover feeding frame (402), a horizontal moving frame (403), a pressure extension tube clamping assembly (404) and a Luer taper clamping assembly (405) are arranged on the end cover machine frame (4), and an end cover overturning screwing assembly (406) is further arranged on the horizontal moving frame (403). And an end cover feeding machine (407) correspondingly matched with the end cover feeding frame (402) is arranged on one side of the end cover rack (4). The device is compact in structure and convenient to use, the production efficiency is improved, the problem that the screwing force cannot be accurately controlled manually is solved, the labor intensity is reduced, the labor cost is reduced, and the enterprise revenue is improved.

Closures with a tamper evidence feature that is configured to connect it to the container neck are disclosed. Methods and systems for carrying out the methods, and to mold stacks for making the closures are also disclosed. The tamper evidence feature can be a band, a portion of a cylindrical skirt or a panel formed in the cylindrical skirt. A frangible connection between the closure and the tamper evidence feature may be created by perforating, slitting or cutting a portion of the closure to provide a frangible connection or line of weakness between the body portion and the tamper evidence feature.