DE102019101640A1 - cartridge - Google Patents

Abstract

The invention relates to a cartridge, syringe or compule with at least one chamber (4), each of which has a tubular chamber wall (5), a connection area (6) arranged at a dispensing end for connecting the cartridge (1, 20), syringe or compule to an accessory (26), each chamber (4) having at least one outlet opening (7) which opens into the connection area (6), and with a tappet unit (2, 22), each of which has a tappet rod (4) for each chamber (4) 12) for displacing a discharge piston (23) accommodated in the respective chamber (4). The at least one chamber (4) is provided within a casing (8) which at least partially encompasses the respective chamber wall (5) and is formed integrally therewith. The casing (8) has at least one guide slot (9) in which an indicator rod (13), which is connected to the plunger unit, is guided in a displaceable manner.

Description

The present invention relates to a cartridge, syringe or compule with at least one chamber, each having a tubular chamber wall, a connection area located at a dispensing end for connecting the cartridge, syringe or compule with an accessory, and with a plunger unit, which is for each chamber has a push rod for displacing a discharge piston received in the respective chamber.

In the dental field, such cartridges, syringes or compules are used for the storage and discharge of dental materials. The cartridges, syringes or compules are not only intended to protect the dental materials stored in them from environmental influences, but also to allow the materials to be discharged in a user-friendly and precise manner. For this purpose, they are partly provided with a removable closure that can be attached to the connection area. Another accessory can also be attached to the dispensing area in order to dispense and / or mix dental materials, for example a mixer, a dispensing spout or the like. Applicator.

A generic cartridge system is from the WO 2013/026717 A1 known. This system comprises two containers with a common connection area, into which the respective outlets of the containers open and can be connected to a discharge mixer.

The in the DE 10 2010 049 378 B4 Cartridge arrangement described comprises a double cartridge with two separate containers, which are spaced apart from one another and are connected to one another by a bridge only at their end opposite the dispensing end, ie the rear end viewed in the material discharge direction. The arrangement also contains a support cartridge into which the two containers can be inserted such that they are axially secured within the support cartridge.

The EP 2 772 221 B1 and the US 8,007,164 B2 disclose a dental mixer with two syringes arranged parallel to one another, which are enclosed by a separate sleeve. A mixing tip can be inserted and locked into the sleeve, so that a dental material stored within the syringes can flow into the mixing tip, mixed there and then discharged.

If the material accommodated in the cartridge is to be dispensed by hand, it is known to use a tappet unit which has a tappet rod for each chamber for displacing a dispensing piston accommodated in the respective chamber. In the DE 10 2015 110 442 A1 such a tappet unit is shown for example for concentric chambers.

With the known cartridges mentioned above, it is not possible to determine the position of the piston within the chamber of the cartridge. From the DE 10 2005 011 643 A1 a cartridge with only one chamber is known in which a piston is slidably mounted. The piston also serves as a level indicator, since a slot is formed in the wall of the chamber through which the piston is visible from the outside. This can negatively affect the tightness of the cartridge.

A disadvantage of known solutions is that, in particular in the case of concentrically arranged chambers, individual components of the materials migrate between the chambers and can lead to hardening of the dental material within the container in the case of long storage times. This makes the materials and the containers unusable. It is also disadvantageous that known containers and cartridges often have areas which easily become dirty and therefore, particularly when used in a patient's mouth area, form a germ area in which reproductive germs are deposited and can thus represent a risk of infection.

It is therefore an object of the present invention to provide a cartridge or a discharge system with such a cartridge, which do not have the disadvantages described above. In particular, the cartridge should be advantageously designed in terms of hygiene and handling.

This object is achieved with a cartridge, syringe or compule, which has at least one chamber, each with a tubular chamber wall. The cartridge, syringe or compule is also provided with a connection area located at a dispensing end for connecting the cartridge, syringe or compule to an accessory, for example a closure, a mixer, a dispensing spout or the like.Applicator, each chamber having at least one outlet opening that flows into the connection area. In addition, the cartridge, syringe or compule has a plunger unit which has a plunger rod for each chamber for displacing a dispensing piston received in the respective chamber. Using the push rod, the respective delivery piston can be moved within the chamber, e.g. discharge a dental material from the chamber.

The at least one chamber is provided within a casing encompassing the respective chamber wall at least in regions and is formed integrally therewith. In other words, the chambers lie at least in regions within the casing which forms the outer surface of the cartridge, parts of the outer surface also being able to be formed by the chamber wall or walls themselves. In particular, the casing is formed in sections by the at least one chamber wall and in sections by an outer wall arranged radially outside the at least one chamber wall.

According to the invention, the casing has at least one guide slot, in which an indicator rod, which is connected to the plunger unit, is guided in a displaceable manner. In this way it is possible to use the plunger unit to form a fill level indicator for the cartridge, syringe or compule, the position of the indicator rod being visible from the outside. This can be achieved, for example, by the guide slot being open to the outside. Alternatively or in addition to this, it is possible for the sheathing to be translucent or transparent at least in some areas. For example, the sheathing is opaque in some areas and translucent or transparent in some areas, the guide slot being provided in the translucent or transparent area of the sheathing.

Since the guide slot is formed in the casing and not in the chamber wall, the tightness of the chamber is not influenced by the level indicator formed together with the indicator rod. Nevertheless, the position of the dispensing piston within the chamber can be precisely displayed using the indicator rod on the tappet unit. For example, it is possible to provide the translucent or transparent area of the casing and / or an area near the guide slot with a scale. As an alternative or in addition, it is possible to design the display rod or an area thereof, in particular the area located towards the discharge end, as an optically perceptible display element, for example by means of a coloring and / or a projection.

The display element can be designed as a hook and / or projection on the display rod. Here, the indicator rod can protrude further than the push rods in the discharge direction, so that the indicator rod is, for example, longer than the push rod and the piston together. As a result, the (filling) level of the material in the cartridge is displayed by the display element and not the position of the rear end of the piston in the discharge direction in the cartridge. The piston can be formed separately or directly on the respective push rod.

Regardless of the function as part of a level indicator, the indicator rod according to the invention has the advantage that the plunger unit with the at least one plunger rod is better guided in the cartridge. Tilting of the plunger unit relative to the cartridge, syringe or compule can thus be avoided, so that incorrect operation can be avoided.

The cartridge, syringe or compule according to the invention can have a single chamber. In this case, the push rod unit has a push rod and at least one, preferably two, indicator rods. In the case of a cartridge, syringe or compule with two chambers, the plunger unit has, for example, two plunger rods and an indicator rod. The use of a plunger unit with three plunger or indicator rods for a cartridge, syringe or compule with one or two chambers is felt to be particularly advantageous with regard to the guidance of the plunger unit relative to the cartridge, syringe or compule.

Regardless of the guidance of the plunger unit within the cartridge, syringe or compule, it is preferred if the casing has at least one locking element and at least one push rod and / or at least one indicator rod has at least one locking counter element. For example, locking notches can be provided on the respective rod and a locking lug can be provided on the casing. As in the DE 10 2005 041 962 A1 Described latches can be easily overcome manually in order to receive, for example, acoustic or tactile feedback when the discharge pistons are shifted within the chambers by a defined amount. The locking lugs and notches therefore serve for exact dosing.

The locking element can be provided on the inner wall of the casing and / or within the casing on the outer wall of at least one chamber. A complementary locking counter element is preferably provided on the push rod and / or indicator rod, which is separate from the cartridge and can each be part of a discharge system.

It is further preferred if the latching means are designed in such a way that they are increasingly brought into engagement with one another when the push rod is moved in the material discharge direction and in particular prevent or at least make it difficult to pull out the push rod against the material discharge direction. For this purpose, the locking means can be used as a web with a sawtooth structure be formed. If the latching means prevent or make it difficult to pull out the push rod, the discharge of the materials stored within the chambers is facilitated, which is particularly advantageous in the case of highly viscous materials. Furthermore, material that has already been discharged from the chambers is prevented from being pulled back into the chambers by moving the push rod counter to the material discharge direction and contaminating the stored material there and / or making the cartridge unusable by curing.

A stiffening element can be provided on the push rod, which preferably extends parallel to the push rod or indicator rods. When the materials are discharged from the cartridge, for which purpose the at least one push rod is moved in the material discharge direction, the stiffening element is inserted into the free space and is preferably guided there. As a result, the stiffening element stabilizes the push rod when the material is being discharged from the cartridge, which is particularly advantageous for cartridges with a small internal volume of the chambers, since there are small radial cross sections corresponding to the longitudinal axis of the chambers, which require correspondingly small dimensions of the plunger of the discharge plunger. Due to the associated material thickness of the push rod, the push rod can easily bend or break, which can be prevented by the stiffening element.

In continuation of this idea, the stiffening element can also have the locking means described above.

A free space is preferably formed within the casing, in particular between the inner wall of the casing and the outer wall of the chambers. This space can be filled with air. This prevents migration of components of the components between the chambers.

Regardless of the design of the casing with at least one guide slot and a corresponding indicator rod of the plunger unit, a further aspect of the invention relates to a cartridge, syringe or compule in which the cross-section of the outer contour of the casing, which is radial to the longitudinal axis of the casing, is at least partially elliptical in shape. The longitudinal axis of the casing is parallel to the longitudinal axis of the at least one chamber. In the case of a cartridge, syringe or compule with two chambers, these are preferably arranged parallel to one another and next to one another, so that the longitudinal axis of the ellipse coincides, for example, with an axis running between the two chambers. In the sense of this invention, a cross-sectionally elliptical sheathing is also understood to mean a sheathing that is, for example, oval or rounded rectangular, in particular a rectangular cross-section, the short sides of which are rounded by semicircles or elliptical sections.

This design of the sheathing makes it possible to hold the cartridge, syringe or compule particularly pleasantly between two fingers when in use. This also improves usability. An additional advantage is that such a closed outer contour makes it more difficult for dirt and germs to deposit on the cartridge, syringe or compule. In addition, a continuous surface is created that is suitable for attaching a label or the like.

In continuation of this idea, the outer wall of the casing is aligned with the cylindrical outer wall of the connection area at its maximum extent that is radial to the longitudinal axis of the casing. As a result, the formation of a step between the casing and the connection area, which can be a possible germ area, is avoided as far as possible, which is advantageous from a hygienic point of view. In addition, this also improves operability, since the cartridge, syringe or compule could get caught in the oral cavity due to the formation of a step between the casing and the connection area during use.

According to the invention, in a cartridge, syringe or compule with two chambers, these are preferably arranged next to one another. The arrangement of the chambers next to one another prevents or at least significantly reduces migration between the chambers, while at the same time the sheathing ensures that the space between the chambers cannot become dirty. Since the casing is also made in one piece with the chambers, the space between the chambers cannot be contaminated before the chambers are inserted into a separately provided casing, which is a problem in particular with known refill cartridges. Here, the contamination is often covered by the sheathing and therefore cannot be seen from the outside, which favors nucleation.

It is also advantageous that the casing enables simple and automatic labeling over the entire circumference of the casing. In particular in the case of cartridges which are intended to be used within the mouth area of a patient, labeling in the case of chambers arranged next to one another often leads to the formation of a spatial area covered by the label which is almost inaccessible due to the labeling is and therefore cannot be cleaned or cannot be cleaned sufficiently. As already mentioned above, such a room area often represents a germ area and therefore a risk of infection.

Since labeling of the cartridge is regularly prescribed, the casing according to the invention offers an advantage here in terms of hygiene. The casing according to the invention also offers an additional surface for the labeling and printing of regulatory requirements, which is particularly advantageous in the case of cartridges with small volumes, since these often do not offer sufficient space for printing without a suitable casing.

It is preferred if the casing is formed in sections by the chamber walls and in sections by an outer wall arranged outside the chamber walls.

According to a preferred embodiment, the chambers are arranged at a distance from one another. In other words, the chamber walls of one chamber have no, in particular no direct, contact surface with the chamber walls of the other chamber. The spacing of the chambers from one another prevents migration of materials stored within the chambers through the chamber walls. This is particularly advantageous with common 2-component materials, since these materials often harden by mixing with one another, which is why migration through the chamber walls can result in the stored material no longer being flowable and must therefore be discarded together with the cartridge.

It is preferred if the connection area has a bayonet connection or a threaded connection for connection to an accessory and the connection area further comprises a coded opening for receiving a positioning element attached to the accessory. The positioning element can, for example, as in FIG DE 10 2012 003 390 A1 be described, wherein the cartridge, syringe or compule has a correspondingly designed positioning opening.

The positioning element can be configured as described above and can be provided on an accessory part that can be connected to the connection area. Therefore, the positioning element is counter to the material discharge direction, i.e. from the discharge end, introduced into the free space, while the plunger unit together with the locking means and / or the stiffening element in the material discharge direction, i.e. be introduced into the free space from the end opposite the dispensing end.

It is further preferred if the casing has a retaining collar at an end opposite the connection area. On the one hand, this allows easy handling of the cartridge and, on the other hand, the materials stored within the chambers can be easily discharged, since a user's fingers can rest on the holding collar and the cartridge can be held in this way.

In particular, the holding collar has an essentially square cross section lying radially to the longitudinal axis of the casing. The outer edges and corners can be rounded. The holding collar is preferably made concentric to the longitudinal axis of the cartridge. It is particularly preferred if the neck collar has regions which are inclined and radially projecting away from the material discharge direction in a first direction and which allow a user's fingers to be placed on, so that the cartridge can be held firmly. In the event that the casing has an elliptical cross section lying radially along the longitudinal axis of the cartridge, it is particularly preferred that the areas inclined against the material discharge direction lie along the minor axis of the elliptical casing.

It is further preferred if the wall thickness of the casing corresponds to 90% to 110% of the wall thickness of at least one of the chamber walls. This simplifies the manufacture of the cartridge.

It is preferred if the chamber walls, if appropriate with the exception of the area for guiding the display plunger, are opaque. This means that light-curing materials can also be safely stored in the chambers. It is particularly preferred to provide the opaque chamber walls in combination with a partially translucent or transparent outer wall described above and / or a recess in the outer wall of the casing. As a result, both the materials in the chambers can be stored protected from light and, at the same time, the fill level can be displayed to a user in a particularly simple manner. This is not possible with known solutions, since the chamber walls are either opaque and protect the stored materials from the influence of light or are translucent and thus indicate a fill level.

The invention further relates to a discharge system with a cartridge as described above, an accessory part attached to it, in particular a sealing plug and / or mixer, and a plunger unit as part of the cartridge, syringe or compule.

The plunger unit preferably has two plungers, the spacing and length of which are adapted to the arrangement and dimensions of the chambers, so that one plunger can be introduced into each chamber. Both plungers are connected to one another at one end via a pressure flange, so that a user can move the plungers relative to the cartridge in the material discharge direction by applying pressure to the pressure flange. The plunger unit is preferably formed in one piece.

It is preferred if the tappets have at least one incision on the side opposite the pressure flange, so that the tappet unit is partially split into at least two parts on this side. As a result, these parts, when preloaded, can protrude slightly in the radial direction to the longitudinal axis of the plunger, beyond the remaining region of the plunger. This means that the plunger must be inserted into the chambers against the pretension, so that the plunger can also be pulled out of the chambers only by overcoming the pretension. This prevents the tappets from being pulled out or falling out unintentionally, so that the corresponding discharge system is particularly user-friendly.

It is further preferred if the discharge system has discharge pistons separate from the discharge plunger. As is known per se, the discharge pistons can be displaced in the material discharge direction by the discharge plunger, so that the material stored in the chamber is discharged. However, when the discharge pistons are separate from the plungers, they do not follow a movement of the discharge plunger against the material discharge direction, so that no material that has already been discharged is drawn back into the chambers.

It is preferred that the total internal volume of the chambers of the cartridge is <50 mL, preferably <25 mL, particularly preferably <10 mL and very particularly preferably <5 mL, since the advantages of the invention and its preferred embodiments mentioned above are most evident for such cartridges can be obtained.

The plunger unit can have a color marking, for example an at least partial coloring, which is designed in the same color as an accessory, for example a mixer and / or a sealing plug, or in a different contrast color to the cartridge, in order to allow the cartridge to be assigned To facilitate the pusher unit with the accessories.

In one embodiment, the guide slot of the cartridge can be completely or partially covered by an adhesive label, which is designed, for example, with a scale and a transparent window. The adhesive label is, for example, film-like and can be provided with additional information about the contents of the cartridge.

The application system, in particular the cartridge, its outlet, the first and the second accessory part can be made of thermoplastic materials, in particular polypropylene, polyoxymethylene, polyethylene, polybutadiene, glass fiber or filler-reinforced thermoplastic materials, polyethylene terephthalate, cycloolefin copolymers, polycarbonate, polystyrene or common Copolymers, in particular ABS plastics or the like. It is particularly preferred if polypropylene or polybutylene terephthalate is used for the cartridge. In the event that the cartridge is made of polypropylene, the accessory, such as mixer or closure, is made of polyethylene or polyoxymethylene. For a harder cartridge made of polybutylene terephthalate, the accessories such as mixers or sealing plugs would be e.g. made of polyethylene or polypropylene. If the cartridge and accessory are combined, it is advantageous if e.g. a hard polypropylene with a soft polypropylene is used. A glass fiber reinforced polypropylene can also be combined with a non glass fiber reinforced polypropylene. For the sealing effect, it is relevant that at least the areas that come into contact with one another in a sealing manner consist of correspondingly well sealing materials, e.g. through plastic combinations hard / soft or soft / hard. Thus the inlet area of the mixer which can be connected to the outlets of the cartridge can consist of polyoxymethylene, while other areas of the mixer, e.g. the mixing element or the housing made of a soft material e.g. Polypropylene can exist.

The invention is explained in more detail below using exemplary embodiments and with reference to the drawings. All of the features described and / or depicted form the subject matter of the invention independently of their summary in the claims or their back references.

• 1 eine Perspektivansicht einer erfindungsgemäßen Kartusche,
• 2 eine Draufsicht der erfindungsgemäßen Kartusche,
• 3 einen Längsschnitt der erfindungsgemäßen Kartusche,
• 4 eine gegenüber 2 um 90° gedrehte Draufsicht der erfindungsgemäßen Kartusche,
• 5 eine Ansicht des dem Ausbringende gegenüberliegenden Endes der erfindungsgemäßen Kartusche,
• 6 eine der erfindungsgemäßen Kartusche entlang der Linie A-A in 4,
• 7 eine der erfindungsgemäßen Kartusche entlang der Linie B-B in 4,
• 8 eine Explosionsansicht eines Austragssystems mit erfindungsgemä-ßen Kartusche nach einer zweiten Ausführungsform,
• 9 eine Explosionsansicht eines Austragssystems mit erfindungsgemäßen Kartusche nach einer weiteren Ausführungsform,
• 10 in Schnittansicht das Ausbringende der Kartusche nach 9,
• 11 in Seitenansicht die Kartusche nach 9, und
• 12 in Schnittansicht die Kartusche nach 9 sowie ein vergrößertes Detail.

They show schematically:

• 1 2 shows a perspective view of a cartridge according to the invention,
• 2nd a plan view of the cartridge according to the invention,
• 3rd a longitudinal section of the cartridge according to the invention,
• 4th one opposite 2nd top view of the cartridge according to the invention rotated by 90 °,
• 5 2 shows a view of the end of the cartridge according to the invention opposite the dispensing end,
• 6 one of the cartridge according to the invention along the line AA in 4th ,
• 7 one of the cartridge according to the invention along the line BB in 4th ,
• 8th 2 shows an exploded view of a discharge system with a cartridge according to the invention according to a second embodiment,
• 9 2 shows an exploded view of a discharge system with a cartridge according to the invention according to a further embodiment,
• 10th the discharge end of the cartridge in a sectional view 9 ,
• 11 the cartridge in side view 9 , and
• 12th in section view of the cartridge 9 as well as an enlarged detail.

The 1 to 7 show a discharge system according to the invention according to a first embodiment with a cartridge 1 , a plunger unit 2nd and a clasp 3rd . The cartridge 1 has a chamber 4th on through a cylindrical chamber wall 5 that is defined at its end of application (right in the 1 to 4th ) in an approximately cylindrical cross section 6 with an outlet opening 7 transforms. The end opposite the spreader (left in the 1 to 4th ) the chamber 4th can be closed by a displaceable discharge piston, not shown.

The chamber 4th is also of a casing 8th partially surrounded by the chamber wall 5 is formed and partially the chamber wall 5 surrounds.

The casing 8th is in one piece with the chamber wall 5 educated. As especially in the 1 , 6 and 7 can be seen, has the casing 8th one in cross section radial to the longitudinal axis L the cartridge 1 elliptical shape.

In the illustrated embodiment is on two opposite sides of the casing 8th one guide slot each 9 formed parallel to the longitudinal axis L runs. The two guide slots 9 are in the embodiment together with the chamber 4th on the main axis of the elliptical jacket 8th , whereas the length of the minor axis of the elliptical casing 8th essentially by the diameter of the chamber wall 5 is defined.

The length of the major axis of the elliptical jacket 8th is slightly larger than the diameter of the cylindrical connection area in the example shown 6 chosen. The length of the main axis of the elliptical casing can deviate from this 8th in a preferred embodiment also equal to the diameter of the cylindrical connection area 6 be.

At the end of the cartridge opposite the dispensing end 1 is a snap hook 10th formed with a radially protruding projection. The locking hook 10th is laterally limited by incisions, so that this against the elastic restoring force of the material of the cartridge 1 can be deflected radially outwards. Deviating from the illustrated embodiment, it is also possible to have a latching hook on opposite sides 10th to provide.

The cartridge 1 also has a collar 11 on, which is rounded rounded square in the embodiment shown. The collar 11 extends from the jacket 8th radially outward and serves the cartridge 1 to be supported on two fingers. In a departure from the embodiment shown, two wing-like retaining collars can also be attached to the in 1 upper or lower side of the casing 8th be trained.

The plunger unit 2nd is like in 3rd shown formed in one piece and consists of a push rod 12th , two indicator bars 13 and a pressure flange 14 over which the push rod 12th and the indicator bars 13 are interconnected. The push rod 12th can with a head start 15 be provided with the dispensing piston (not shown) for, if necessary, detachable connection. The push rod 12th has in the exemplary embodiment shown in the figures a cross-shaped cross section, which is dimensioned such that the push rod 12th slidable in the chamber 4th is recorded.

In the 4th upper and lower legs of the cross-shaped pushrod 12th are on the outside with notches 16 provided with the locking hook 10th work together. Because of the two opposite rows of notches 16 can the plunger unit 2nd in two positions rotated by 180 ° into the cartridge 1 are used, each with a series of notches 16 with the locking hook 10th comes into engagement.

The locking hook 10th can also be deflected against the elastic restoring force so that the plunger unit 2nd around a notch 16 can be withdrawn. This can be useful at the end of a spreading process in order to reduce the pressure in the Relieve the pressure on the cartridge so that no material runs on.

The two indicator bars 13 are each in a guide slot 9 added. In the illustrated embodiment, the two indicator bars are 13 radially slightly out of the respective guide slot 9 to the position of the end of the respective indicator rod pointing towards the end of the cartridge 13 to be better recognizable from the outside. As an alternative to this, however, it is also possible for the indicator rods 13 flush with the casing 8th to lock. The indicator bars 13 can be provided with a marking, in particular at their end toward the dispensing end of the cartridge, for example a projection or a coloring.

The closure 3rd is detachable with the connection area 6 the cartridge 1 connected. In the illustrated embodiment, this is by means of a threaded connection with an external thread of the closure 3rd that in an internal thread in the connection area 6 intervenes, realizes. Alternatively, there is also a bayonet connection between the lock 3rd and the connection area 6 the cartridge 1 possible. A head start 17th of the closure 3rd engages in the 1 to 4th shown closed state of the cartridge 1 into the outlet opening 7 the chamber 4th and closes it.

In the example shown, the cartridge is equipped with a tamper-evident closure, which can indicate the first use of the cartridge. This is between the clasp 3rd and the cartridge 1 , especially the connection area 6 the cartridge 1 , a connecting element 18th provided that in the illustrated embodiment, the cartridge is not nondestructive 1 and from the clasp 3rd can be separated. So the connecting element 18th for example with the cartridge 1 be welded and over webs 19th , which serve as a predetermined breaking point, in one piece with the closure 3rd be trained. If the clasp 3rd from the cartridge 1 removed, in particular screwed off, the webs 19th severed so that the first opening of the cartridge 1 is recognizable from the outside. The connecting element 18th remains on the cartridge 1 and can for example have a coding in the form of a colored design.

After removing the clasp 3rd can the cartridge 1 can be connected to an applicator, not shown, for example a dispensing spout.

This can be done by means of the internal thread of the connection area 6 respectively. One in the chamber 4th In this way, absorbed material can be similar to a syringe from the cartridge 1 be deployed with the locking hook 10th in cooperation with the notches 16 dispensing in predefined doses enables. The level inside the chamber 4th is independent of that from the cartridge 1 protruding tappet unit 2nd also by the position of the indicator bars 13 well visible.

An alternative embodiment is shown in 8th shown. Compared to the first embodiment, functionally identical components are provided with identical reference numbers in the second embodiment.

In the 8th cartridge shown 20 is as a double cartridge with two chambers 4th trained, which are arranged parallel to each other and side by side. The casing is made accordingly 8th the cartridge 20 at the ends of the main axis of the elliptical jacket 8th through the respective chamber walls 5 formed while the minor axis of the elliptical jacket 8th between the two chambers 4th lies. In the illustrated embodiment, the two chambers 4th from each other, so that there is a space between them that allows the migration of material between the chambers 4th prevented.

The cartridge 20 is in the example shown with only one guide slot 9 provided at one end of the minor axis of the elliptical jacket 8th is positioned. The guide slot 9 can through a transparent film 21 be covered to the outside. The length of the major axis of the elliptical jacket 8th corresponds to the diameter of the cylindrical connection area 6 the double cartridge 20 . The transparent film 21 is preferably designed as an adhesive label with a scale and a transparent window.

According to the design of the cartridge 20 as a double cartridge with two chambers 4th is the plunger unit 22 with two push rods 12th and an indicator bar 13 educated. The display bar 13 has an elongated cross section and points to the in 8th lower side notches 16 on that with the snap hook 10th the cartridge 20 interact as explained above for the first embodiment.

In 8th are also discharge pistons 23 depicted the chambers 4th seal on the side opposite the discharge end and by means of the push rods 12th can be moved in the application direction.

The cartridge 20 can by a closure 24th be closed on the side of the spreading end. The connection between the Clasp 24th and the cartridge 20 takes place as explained in relation to the first embodiment by means of a threaded connection, again between the closure 24th and the cartridge 20 a connecting element 18th with webs serving as a predetermined breaking point 19th can be provided so that the closure 24th forms a tamper-evident seal. Additionally or alternatively, such a tamper-evident closure can also be provided between the cartridge and the plunger unit.

The closure 24th has two protrusions 17th on, each in outlet openings of the two chambers 4th can intervene. To align the clasp 24th is in the in 8th shown embodiment a positioning element 25th on the clasp 24th provided that protrudes counter to the application direction and into a corresponding opening in the connection area 6 the cartridge 20 can intervene. For this it is necessary that the closure 24th is constructed in at least two parts, the positioning element 25th with the ledges 17th must be rotatable relative to the area having the external thread.

In 8th is still a mixer 26 shown with the cartridge 20 can be connected if the closure 24th is removed. This is the mixer 26 also provided with an external thread that fits into the internal thread of the connection area 6 the cartridge can be screwed in. The mixer too 26 is with a positioning element 25th designed to connect the mixer 26 and the cartridge 20 to facilitate. The positioning element 25th can also serve as a coding if the cross section of the positioning element 25th and the corresponding opening inside the cartridge 20 are adapted to one another in such a way that only a specific positioning element 25th into the opening of the cartridge 20 is insertable.

Another embodiment with a double cartridge 20 is in the 9 to 12th shown. The connection area 6 This cartridge is different from that in the 1 to 8th illustrated threaded connections for accessories with a bayonet connection between the mixer 26 and the cartridge 20 executed. For this purpose are on the housing of the mixer 26 two bayonet projections 27 and on the ring of the connection area 6 bayonet jaws corresponding to the cartridge 28 educated.

To simplify injection molding production, the ring is the connection area 6 the cartridge with recesses 29 provided that form exemptions to tools for shaping the bayonet jaws 28 easy to feed and remove. Corresponding recesses can also be used in the manufacture of the internal thread in the embodiments of the 1 to 8th in the annular connection area 6 be provided.

The in 9 hook-like projection 30th on the display bar 13 stands over the push rods in the discharge direction 12th in front. If the in 9 Dispensing piston, not shown 23 adjacent to the push rods 12th or their projections 15 are provided, the free end of the projection located in the discharge direction 30th flush with the front of the delivery pistons 23 that lies against the material to be spread. The projection shows the fill level in the cartridge 20 exactly.

The enlarged detail in 12th shows how the lead 30th over a predetermined breaking point with the retaining collar 11 can be connected to form a rear tamper-evident closure, which can indicate the first use of the cartridge. In addition, this connection secures the ram unit against unintentional movement before the first use via a predetermined breaking point.

Reference list

1

cartridge

2nd

Ram unit

3rd

Clasp

4th

chamber

5

Chamber wall

6

Connection area

7

Outlet opening

8th

Sheathing

9

Guide slot

10th

Locking hook

11

Collar

12th

Push rod

13

Display bar

14

Pressure flange

15

head Start

16

Notch

17th

head Start

18th

Fastener

19th

web

20

cartridge

21

transparent (adhesive) film or labeled label with scaling and brand name or logo

22

Ram unit

23

Spreading piston

24th

Clasp

25th

Positioning element

26

mixer

27

Bayonet projection

28

Bayonet jaw

29

Recess

30th

head Start

L

Longitudinal axis

QUOTES INCLUDE IN THE DESCRIPTION

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Patent literature cited

• WO 2013/026717 A1 [0003]
• DE 102010049378 B4 [0004]
• EP 2772221 B1 [0005]
• US 8007164 B2 [0005]
• DE 102015110442 A1 [0006]
• DE 102005011643 A1 [0007]
• DE 102005041962 A1 [0017]
• DE 102012003390 A1 [0031]

Claims (11)

Cartridge, syringe or compule with at least one chamber (4), each of which has a tubular chamber wall (5), a connection area (6) arranged at a dispensing end for connecting the cartridge (1, 20), syringe or compule with an accessory part (26 ), wherein each chamber (4) has at least one outlet opening (7) which opens into the connection area (6), and with a tappet unit (2, 22), each of which has a push rod (12) for displacement for each chamber (4) of a dispensing piston (23) accommodated in the respective chamber (4), characterized in that the at least one chamber (4) is provided within a casing (8) which at least partially encompasses the respective chamber wall (5) and is formed integrally therewith, and that the casing (8) has at least one guide slot (9) in which an indicator rod (13), which is connected to the plunger unit, is guided in a displaceable manner. Cartridge, syringe or compule after Claim 1 , characterized in that the plunger unit (2, 22) either with a cartridge (1), syringe or compule with a chamber (4) has a plunger rod (12) and two indicator rods (13) or with a cartridge (20), syringe or Compule with two chambers (4) has two push rods (12) and an indicator rod (13). Cartridge, syringe or compule after Claim 1 or 2nd , characterized in that the casing (8) has at least one latching element (10) and that at least one push rod (12) and / or at least one indicator rod (13) has at least one latching counter element (16). Cartridge, syringe or compule after Claim 1 , characterized in that the casing (8) is formed in sections by the at least one chamber wall (5) and in sections by an outer wall arranged radially outside the at least one chamber wall (5). Cartridge, syringe or compule according to one of the preceding claims, characterized in that a free space is formed within the casing (8), in particular between the inside of the outer wall and the chamber wall (5) of the respective chamber (4). Cartridge, syringe or compule according to one of the preceding claims, characterized in that the cross-section of the outer contour of the casing (8) which is radial to the longitudinal axis of the casing (8) is elliptical at least in regions. Cartridge, syringe or compule after Claim 6 , characterized in that the outer wall of the casing (8) at its maximum radial extent to the longitudinal axis of the casing (8) is flush with the cylindrical outer wall of the connection area (6). Cartridge, syringe or compule according to one of the preceding claims with two chambers (4), characterized in that the chambers (4) are arranged side by side and spaced apart. Cartridge, syringe or compule according to one of the preceding claims, characterized in that the guide slot (9) is open to the outside. Cartridge, syringe or compule according to one of the preceding claims, characterized in that the casing (8) is opaque in areas and translucent or transparent in areas, the guide slot (9) being provided in the translucent or transparent area of the casing (8). Cartridge, syringe or compule according to one of the preceding claims, characterized in that the guide slot (9) is covered to the outside by a transparent film (21), which is preferably in the form of an adhesive label with a scale and a transparent window and / or a Name, logo and / or note is formed.

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