DE2918121A1 - COMPOSITE CARTRIDGE AND DEVICE FOR DOSING THE CONTENT TO BE PRESSED - Google Patents

Description

- 8 - A 1764

Steven R. Anderson, Edina, Minnesota 554-35, V.St.A.

Composite cartridge and device for dosing the to be squeezed out

Content

Summary of the revelation

The present invention provides a composite cartridge that
contains two different flowable substances separately from each other, which harden after mixing. The cartridge has at its head end an elongated cylindrical main body with a protruding neck and at its blunt end a piston-movable closure assembly. One of the substances is located in an inner central chamber with a disk-shaped closure, the other in an outer annular chamber with a

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annular closure coaxial with the central chamber and around this is lying around. The chambers are each connected to a channel through the cartridge neck. One arranged only at the head end Device supports the central chamber against movement in the cartridge while the contents of the cartridge are being pressed out by the piston assembly at ». There's one on the neck Fastening device provided with which a mixing nozzle can be set on him.

Furthermore, the invention creates - in combination with the cartridge and separately from it - a device for simultaneous dosed pressing of the separated substances from the cartridge. The device has a frame and a piston assembly coaxial elements that are mounted and guided as a unit so that they can be moved in a straight line in the frame. The frame is with a Holding device provided that the cartridge with the closures located at the blunt end in front of the coaxial elements of the Piston assembly and keeps aligned with these. An advancing device takes care of advancing the piston assembly regarding the frame.

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The present invention relates to a composite cartridge which can be stored and shipped and which are separated from one another at least contains two different flowable substances that interact with each other harden mixed. The invention also relates to the combination of such a cartridge with a device for Dosing of the contents to be squeezed out and the device for itself.

There are currently numerous curable 2-component systems in use - especially for adhesives, fasteners, fillers, Coatings, seals, linings and the like. Such systems generally consist of a flowable Composition that can be described as resinous as well as another flowable composition that can be can be described as a hardener. Pigments, plasticizers and other additives can be used as part of one or both of the components of the System. If the two different flowable agents are mixed together homogeneously, the hardens resulting mixture, i.e. they react to form a relatively solid non-malleable mass that is very brittle or can also be very elastic. Curing generally takes place at room temperature, although higher Can accelerate temperatures. Many at ambient or skin temperature hardening 2-component systems show extraordinary xworthy properties; up to now they have only been used improperly by the user. Unless the User cannot take special precautions

due to prematurely hardened material or clogged mixing equipment costly losses occur.

The "previously proposed devices or cartridges for 2-component systems are inadequate in several ways. They require mixing of the components in the cartridge or in one end of the cartridge assembly prior to extrusion; the entire contents of the cartridge must then be used immediately to avoid losses. Some manufacturers use hoses, which "produce unreliable results and do not allow precisely dosed squeezing, especially when the packaged Substances are of different viscosity. All known cartridges do not have separate channels in a protruding one Open neck and therefore do not allow a partially used cartridge to be kept for later use.

Furthermore, the squeezing devices have so far not had the combination of features that are required in order to be coaxial to squeeze out packaged 2-component systems in a metered manner, and in particular have not yet shown the combination of the coaxial piston, cartridge holding device and piston advancing device that is revealed here.

The invention creates a composite cartridge that can be stored and transported as a novel object. This cartridge contains separately at least two different flowable from each other

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Compositions that are mixed together homogeneously and then harden. The cartridge has an elongated cylindrical Main body with a round neck protruding outward from the head end and one with a at the blunt end Piston movable closure on. In the structure of the main body, it has an elongated cylindrical inner wall and a rigid elongated cylindrical outer wall. The inner and outer walls are arranged coaxially with one another and are spaced apart and run out in substantially the same transverse plane at the butt end of the main body. The inner wall forms a central chamber and the inner chamber with the outer wall forms an annular chamber in the main body. One of the substances is located in the central chamber, the other in the annular chamber. A first channel through the protruding neck is in flow communication with only the central chamber and has a voidable closure at its outer end. A second channel through the protruding neck is in fluid communication with only the annular chamber and has an openable closure on its outer End. A disk-like closure which can be axially displaced with a piston is sealed against the inner wall within the inner wall arranged close to the blunt end of the cartridge. An annular closure axially displaceable with a piston is between the inner and outer walls are arranged close to these adjacent to the blunt cartridge end. These closures allow a simultaneous metered squeezing of the various compositions from the cartridge by means of the piston in one predetermined ratio for later mixing and hardening.

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A device arranged only at the head end of the cartridge supports the inner wall against relative movement relative to the outer wall, while the pistons print the compositions. A mixing nozzle can be fixed there with a fastening device on the neck of the cartridge.

Furthermore, the present invention provides a novel device for squeezing and furthermore creates the combination the same with a cartridge as explained above.

The device allows simultaneous and metered squeezing of the two separate compositions from the head end of a cylindrical composite cartridge, which at its blunt End with two coaxial plunger-movable closures, i.e. one disc-shaped and one circular ring-shaped is. This device has a frame and a piston arrangement made of coaxial elements, which are arranged in the frame and are guided by it as a unit so that they can be moved in a straight line. The coaxial elements are a disk-shaped piston (which is supported at one end of a rod) and an annular one Piston (the one at one end of a sleeve-shaped element sits). A holding device on the frame holds the cartridge with the disc and the annular closure of the Cartridge in front of the disc and the annular piston of the piston assembly axially aligned. A feed device takes care of the straight feed of the piston arrangement with respect to of the frame.

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The invention will now be described in detail with reference to the accompanying drawings to be discribed.

Fig. 1 is a schematic side view of a cartridge according to the present invention with various parts broken away to show in the manner of a longitudinal section;

Figure 2 is a section on line 2-2 of Figure 1;

3 is a schematic partial perspective view of an interior wall structure for a cartridge according to the invention and shows the molded support wings and a layer structure for the wall with the layers and the end of the inner wall broken away;

Fig. 4- is a schematic section through a preferred closure according to the present invention;

Figure 5 is a section through an alternative of one Piston movable closure;

Figure 6 is a fragmentary perspective view of the head end an exploded view-style cartridge;

Fig. 7 is a longitudinal section in the form of an exploded view and Figure 12 shows another alternative embodiment of the head end of a cartridge;

Figure 8 is a front view of a portion of the embodiment of Figure 7 taken on line 8-8;

9 is a schematic cross-sectional view of one species a suitable static mixing nozzle;

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Fig. 10 is a schematic perspective view of a pneumatically powered application device;

S ¹ Ig. 11 is a section along the longitudinal axis of the device according to S ¹ Xg. 10 with some parts shown in side elevation;

S ¹ Xg. Figure 12 is a schematic perspective view of an alternative applicator;

S ¹ Xg. 13 is a section on the longitudinal axis of the device according to S ¹ Xg. 12;

S ¹ Xg. 14- is a schematic, and largely crawled and sectioned side view of another applicator and shows in section the blunt end of an inserted cartridge which is being extruded;

The S ¹ Xg. 1-4 show one embodiment of the elongated cylindrical cartridge. A central chamber 10 contains a flowable composition or mass; a coaxial annular chamber 11 contains a different flowable composition. Typically, one will manufacture the cartridge with a resin composition in the annular chamber and a hardener for the same in the central chamber; however, this arrangement can also be reversed. The cartridge structure prevents mixing of the different compositions in the cartridge, but allows them to be pressed out of the cartridge simultaneously with the plunger in a predetermined ratio for the subsequent mixing and hardening.

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The elongated cylindrical main body of the cartridge has a rigid elongated cylindrical inner wall 16 and a rigid elongated cylindrical outer wall in construction 21 on. These walls are arranged coaxially with one another and are spaced from one another. They essentially end in the same transverse plane at the blunt ends 17, 22, i.e. at the blunt end of the cartridge. A first channel, which is a round one Wall 19 forms, extends through the protruding neck of the cartridge and is in flow communication only with the central chamber 10. At its front end there is an openable closure 20, which is shown in FIG. 1 as a cover plate or -wall is shown. This end wall can easily be cut off in order to open the shutter. A second channel from the .Raum around the round inner wall 10 and the round outer wall 24 also passes through the protruding neck at the head end of the cartridge. This second channel stands in flow communication only with the annular chamber 11. The outer end of the second channel is with an openable closure 25 provided in Pig. 1 as an end wall or cover 25 is shown. The closure 25 is opened by cutting it off. The disc-like closure 12 is tight in the Inner wall 16 used at its blunt end. The annular closure 15 is located tightly between the inner wall 16 and the outer wall 21 at its blunt end. Both closures can be moved by pistons in the axial direction of the cartridge to express the contents of the cartridge. The inner and outer walls are in the main body over their entire length

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a uniform diameter of each cartridge. the Inner wall 16 is supported against movement relative to outer wall 21 during the extrusion process - for example by the wings 26, 27, 28, 29 - only at the head end of the cartridge. The neck 24 has a fastening device such as the thread 37, in order to be able to place a mixing nozzle on it.

In the "preferred embodiments of the present invention are all parts that form the boundaries for the inner chamber 10 and the outer chamber 11 (with the exception of the end closures 12, 13 and possibly also of the "removable" closures for that Channels of the neck), preferably uniform (as opposed to a design with locked or screwed together Share). Furthermore, all parts of the outer wall structure 14 are preferably spaced apart from corresponding parts of the inner wall structure 15 as a whole and preferably are all Parts arranged coaxially around the central axis of the cartridge.

For example, a uniform inner wall structure has a rigid, elongated hollow cylindrical main section 16, which is open at its blunt end 17, a stiff shoulder portion 18 which is radially inward at its head end extends, and a neck channel portion 19 which protrudes from the shoulder portion 18 axially outward. The shoulder 18 can be tapered or flat; preferably it is slightly frustoconical. A slight taper of the neck 19 can be provided as an option. All of these parts are

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hermetically sealed and continuous. In FIG. 1, the closure cover 20 is also formed in one piece with the neck 19. One uniform inner wall can be in a single passage made from polypropylene or high-density polyethylene or some other plastic. Optionally, you can use the cylindrical Produce main section 16 separately from the head and later glue or weld tightly.

A unitary composite outer wall 14 also has a rigid elongated cylindrical body 21 which is open at its blunt end, a rigid shoulder part 25, which is directed radially inward at the head end, and a stiff round neck 24 extending from the shoulder 23 outward protrudes. This structure is hermetically sealed and continuous. As FIG. 1 shows, the cylindrical body is 21 the outer wall is slightly longer than the cylindrical main part 16 of the inner wall and is up to about a third of the neck part 19 spaced outwardly from the inner wall.

The blunt end 22 is directed radially outwardly from the blunt end 17 of the inner wall substantially radially. The shoulder portion 23 (preferably flat, but optionally frustoconical) extends forward but is spaced from the neck portion 19 of the inner wall. The neck 24 preferably has a smaller diameter than the cylindrical main part 16 of the inner wall and is spaced outwardly from the neck part 19 of the inner wall. The neck 2Ά- is preferably substantially cylindrical;

Optionally, a slight taper, for example. To attach or "Attach certain types of mixing nozzles to be advantageous. At the outer end of the neck part 24 is a Lid or an openable closure 25 If desired, the closure cover 20 and 25 can be combined with one another. As in the case of the inner wall, the outer wall can in its basic structure be molded from high density polyethylene, polypropylene, or nylon or some other organic plastic.

The support structure of the radially spaced rigid wing elements 26, 27, 28, 29 (see. Fig. 1 and 2) keeps the distance upright between the walls and prevents displacement the entire inner wall 15 to the shoulder part 23 of the outer wall 14, if thrust is applied to the inner wall when the contents are pressed out. The wing elements are essentially in Axial direction of the cartridge aligned. They run between the outer surface of the shoulder part 18 and the inner surface of the Shoulder part 23 and in particular also in the axial thrust direction between these. A minimum of three wings may suffice; more than five or six are unnecessary. The support strength is improved if the wing elements extend up to about a third to the entire length of the neck part 19 and extend radially to the neck portion 24 of the outer wall. The wing elements can extend from the shoulder 18 of the inner wall and also extend from the neck 19 to that part of the cylindrical body 21 of the outer wall 21 which is radially outward from the shoulder 18 and the neck 19 of the inner wall. You can

also be molded onto the inner wall (see Pig. 3) and later pressed into the outer wall, snapped into place or with it by ultrasonic welding or another "known method" be firmly united. In the .Raum radially outward along the length of the main cylindrical portion of the inner to There is no support element on the outer wall.

The disk-like and annular shutters 12 "and 13, respectively act as a seal by preventing the liquid compositions from escaping from their cartridge chambers. Both closures are preferably expandable by means of pistons. They are expediently made of organic plastics such as high-density polypropylene, polyethylene, or polystyrene Nylon trained.

A preferred type of closure is in KLg. 4- shown; it shall be referred to as a disk-shaped closure 12 for the following description. Yon the side facing the cartridge contents area of the disc as seen central portion 31 is concave. This concave surface merges into a rearwardly protruding Hing or skirt 32 with wipers, scrapers or O-rings 33 arranged on its outer surface, which protrude outward and preferably also axially forwards. If a disc piston presses on the rear side (the convex side) of the concave central part 31 _5, the depression flattens out, so that the disc part 12 is leveled. The apron is pressed outwards and widens. So the cockroach

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rings 33 firmly on the inner surface of the inner wall 15 of the Cartridge printed so that "when pressing out the one located there Cartridge contents are scraped off.

The annular closure 13 (Fig. 1) is convenient formed in a similar way. Its middle part (between the inner skirt 34- and outer skirt 35) is annular recessed so that the surface facing the contents of the bing chamber of the cartridge is annularly concave. If an annular When the piston pushes this closure, the recess is flattened and pushes the inner skirt 34 and the outer skirt 35 of the annular closure on the inner and outer surface, which surround the chamber of the cartridge. Scraping elements (as shown at 33 in Fig. 4) are located on both the Inner and outer skirt of the locking ring and work as described above.

Before you can squeeze out the contents of the cartridge, the closures must of the channels in the neck at least substantially removed - for example, by cutting across both necks. One or more can be used as an indicator for the cut Make annular marks on the outer surface of the outer neck 24; the figure shows three bulges 36. The User may want to start between the outermost first and second bead and then between the second and the Make a third bead if you want to use up the remaining part of the cartridge later. Other form

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markings can also be provided - e.g. Indentations or imprints. A bulge or a rib is preferred because it can also be used as an O-Hing serve, which seals the neck against the inner surface of a mixing nozzle that is placed on the protruding neck or there should be set.

On the outside of the protruding neck 24- runs along its entire length or between a marker 36 and the shoulder 23 a fastening device 37> with the one static Mixing nozzle (Fig. 5) can be set on the neck. Appropriately one uses here a thread 37 j cLa.s to the Fits internal thread in a mixing nozzle. Other fastening means - for example a clip placed on the outside - are also possible. Alternatively, you can provide an annular groove on the neck 24, which fits to her bead on the inner surface of a Mixing nozzle picks up.

The butt end of the cartridge is suitably provided with a removable snap-on, frictionally held, or sealed lid 38 which protects the inner closures 12, 13 during shipping and storage. If the lid is tightly closed, it can be removed to insert the cartridge by making a cut across the blunt end. Any suitable material, for example metal or plastic, can be used for the outer cover 38. Since some of the possible fillings for the cartridge are extremely moisture-sensitive

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lick you can put a desiccant in a porous membrane bag Insert 39 between the outer cover 38 and the inner closures 12, 13 in order to extract moisture from the interior of the cartridge. Furthermore, you can use the cartridges with Sperrbzw. Fastening means 40 are provided to a specially designed To attach piston assembly for metered dispensing of the contents. Such means 40 can, for example, be an external thread (or a hat or a bulge) on the outer surface of the Be the outer wall at its blunt end. This device 4-0 mates with a corresponding device on the applicator to hold the cartridge so that the contents with the piston can be squeezed out.

Depending on the filling of the cartridge you can choose the wall of the Build a cartridge from several layers or from a laminate of different materials (Fig. 3) inner film 41 made of hardened elastomeric polyurethane resin, polytetrafluoroethylene or another resin on the wall pad 42 made from molded high density polyethylene or polypropylene or the like. The entire outer surface - specifically the outer surface of the inner wall - can be covered with a metal foil 43 are covered, and on this one can a film 44 made of hardened polyurethane or another high density glue on hardened material. Finally, a foil made of metal - for example aluminum - can be used in the basic structure of the wall be embedded in high-density plastic. The aluminum foil or another metal can be used on the inner surface of a

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or both walls with or without another layer or Foil made of hardened or high-density plastic can be glued on. Furthermore, one can also consist entirely of metal Use walls.

These as well as other layered structures or laminates can be combined in different ways as desired or necessary for the inner and outer walls and also for the closures verirenden to the respective walls for gases, To make fumes or moisture impenetrable and such to prevent the contents of the cartridge from being compromised. Paper materials can also be used in the manufacture of some of the walls use if the contents of the cartridge can be adequately protected by it (paper alone or in combination with Impregnating agents or additional layers). The walls are preferably pressure-proof and sufficiently rigid or rigid, that they can withstand the thrust forces that occur during squeezing without tearing or bursting. Thinner walls, which expand or expand during the squeezing process can be used in combination with an application device, in which the cartridge is surrounded by a sleeve or jacket that keeps the expansion within limits. High density Plastics result in walls that are very safe against damage during shipping and (alone or in combination with specially designed application devices) are firm or rigid, as is necessary for properly dosed pressing is required.

9848/07 Bg

Applying a resin coating to the walls leaves can easily be achieved by applying a solution of the respective coating agent (e.g. an elastomeric polyurethane) it rinses and then cures the layer at ambient temperature or at an elevated temperature, as appropriate Composition required. Metal foils in the walls are preferably inserted during the formation of the walls.

Different forms of "closures" can be used. The closure disk according to FIG. 5 has a stiff, flat central part 45 against which a piston can rest. It is provided with a widened edge 46 - expediently with a circumferential depression on the outer surface, which lies tightly against the inner surface of the cartridge and scrapes along it. The widened edge 46 is there like an apron on both sides of the central disk 45. Comparable features can also be provided for a locking ring.

6 shows the protruding neck on the head 47 of a cartridge the structure of a check valve 48, 49 to prevent a flow or an escape of the cartridge contents from the Avoid neck canals when the plungers that squeeze out the cartridge contents are temporarily not advanced. These Valves can expediently consist of a plurality of valve caps, which are arranged in a ring from an outer one

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The ring surface of the wall protrudes inwards like a hinge and is made of the same material as the wall; their contiguous inwardly directed edges are designed to match and adjoin one another. The tabs or Flaps "consist of the same material as the walls which forms channels in the throat. Each flap is separated from the adjacent ones by cutting or weakening lines, which tear easily under the piston ejection pressure. The flaps then bend outward and open so that the Cartridge contents can escape below the piston ejection pressure, and close again when the ejection pressure ceases. In the embodiment of the]? ig. 6 is the valve 48 at the end of the Wall 50, which forms the channel for the central chamber, the furthest in front, and more than the valve 49 at the end of the channel for the annular chamber. The flaps of the valve 49 surround the central channel wall 50 and its furthest inward Edges are either connected to it by a thin, tearable web made of material or lie close to it. One Threaded cap 51 with one on the valve assembly of the neck matching interior design is screwed onto the thread 52, protects the valves and presses the valve flaps into the closed position. This type of reveal closure for the cervical canals is particularly useful when partially depleted cartridges are to be stored for later use.

In the pig. 7 and 8 is the neck 53 of the cartridge in the axial direction before, as preferred, but eccentrically or from the

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Cartridge axis laterally offset. Furthermore, the channels 54-5- »55 lie side by side in the neck. The support ^{wings of the J 1} Xg, 1, 2, and 3 are unnecessary for this head construction; the shoulder 56 is reinforced or thick and itself serves as a support in order to prevent a longitudinal displacement of the inner wall 57 relative to the outer wall 58. The openable closure for the channels is formed from a removable plug assembly and a cap. The plug 59 sits tightly in the channel 54? how the plug 60 sits tightly in the channel 55. The plugs 59, 60 are attached together on a plate 61 to form a plug arrangement which can easily be lifted off or removed as a unit from the channels. The cap 62 is screwed onto the neck on its threads 63 and helps to maintain the apparent closure of the plug assembly.

A wide variety of Use 2-component systems. The two components are referred to one expediently as component A and component B. For example, it can be the basic substance for the component A is an epoxy material (e.g. made of epichlorohydrin / bisphenol A) and component B is a hardener or catalyst (e.g. a modified polyamide, dihydrazide, etc.) act to cure the epoxy material. You can also use a Amide, amine or urethane or other material reactive with a diisocyanate as the one component and one Use diisocyanate as the other component. A butyl, for example. a low molecular weight butyl rubber or rubber precursor

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one component, a hardening agent such as, for example, a p-quinone dioxime, can be the other. 2-component systems with foilsulfides and silicones are also known, as are foamable 2-component systems. These as well as a variety of others as they are currently available or as they will be developed in the future can be used. Fillers, pigments, plasticizers and other components can be provided as desired. Highly reactive or reactive with moisture Substances such as diisocyanates can be filled into the cartridge, shipped and stored for longer periods of time, provided that the walls used in each case are sufficiently impermeable.

The cartridge chambers to fill so that inclusions from unwanted Environmental gases or moisture can be avoided using known methods. During filling, for example and applying the closures apparently under vacuum conditions can be done, the additional expense can be avoided in most cases (even where moisture inclusions are undesirable) by carrying out the filling in a relatively low-humidity environment and the closure on the respective cartridge chamber with a removable sheet ("reed") made of plastic (e.g. polytetrafluoroethylene) attached, which runs in the chamber along a chamber wall. Environmental gases can be released from the filled Remove the chamber by pressing the lock against the filling so that it escapes along the sheet; thereafter

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pull out the sheet.

The mixing nozzle after. S ¹ Xg. 9 is one of the "useful designs. The nozzle has a special annular coupling 65 with an internal fastening device 64- (e.g. an internal thread) and can thus be fitted onto the fastening device on the neck of the cartridge (e.g. the external thread 37) The nozzle is placed on the neck after the neck closures have been opened or at least any protective cap has been removed so that the only remaining step is to pierce a thin sealing membrane A sequence of mixing elements 67, such as curved triangular wings, is located in the chamber 69. The grids or sieves 68 serve as a final mixing device before the cartridge contents escape onto a workpiece or a surface.

The controlled, metered pressing out of the two separate components from the head end of the cylindrical composite cartridge in the right proportion for homogeneous mixing in the mixer is done with a device that puts the cartridge in the required Assignment to coaxial pistons of the device holds and which guides the pistons as they move.

The preferred device for expressing the contents of the cartridge is that shown in FIGS. She has a frame

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120, in which a piston assembly of coaxial elements is mounted and guided as a unit so that it can be moved in a straight line. These Coaxial elements are a disc-shaped piston 121 on one end of a centrally arranged rod 122 and an annular one Piston 123 on one end of a sleeve 124. Both pistons are mounted so that they lie in the same transverse plane; the strength imparted by the carrier 124 helps stabilize it of the piston against an impact movement out of the transverse plane. The pistons are wide, so that a large contact area to the locking disc and the Closure ring of the cartridge and therefore result in a high level of reliability in the metered dispensing.

The cartridge is received on the frame by a partially open or closed sleeve 125; best used one here is a rigid metal sleeve, the diameter of which is just sufficient to accommodate the cartridge without it being inserted stuck. Such a sleeve prevents the outer wall of the cartridge from expanding when it is pressed out and allows relatively provide thin outer walls for the cartridges. The cartridge is held in the holder 125 by the retaining clip 126 can snap into openings 128 on pin 127. The holder 125 is rigidly attached to the frame 120 with a union nut 131, which the flange 129 on the inner end of the holder 125 firmly pulls onto the guide ring 130 of the frame 120. This arrangement aligns the lock ring and lock washer the cartridge with the annular piston 123 or the

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Disc piston 121 axially; the alignment stays on top of that Maintain the entire piston movement.

A piston 152 with an O-ring seal 133 serves as a bearing base for rod 122 and sleeve 124 and is part of the piston assembly as a whole. The cylindrical base frame 120 leads the piston 132 in its rectilinear movement in this. The straight movement of the sleeve 124 is likewise guided, for example by the hanging 130 in the frame 120.

The advancement of the piston 132 and consequently the entire The piston is arranged hydraulically. A frame housing 134 is arranged at the rear end of the cylindrical frame 120 and sealed against it with an O-ring. A pistol-like one Handle 135 protrudes from housing 134. Can be attached to a coupling 136 a source of hydraulic fluid, for example compressed air, is connected. The air passes through line 137 and flows to a valve ball 138, which is pressed onto the valve seat 140 by a spring 139. In this condition the air cannot enter the housing 134 through the conduit 141 enter; Likewise, the air in the housing 134 can pass through the line 141, the chamber 142 and the outlet channel 143 escape. A control 144 in the manner of a trigger is appropriate Way hydraulically sealed and mounted in a straight line in the chamber 142 so as to be movable. If it is pulled, element 144 closes the outlet channel 143 and opens the valve 138, so that air through the line 137, the chamber 142 and the line 141 in

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the gel louse 134 can penetrate and move the piston 132. If the control element 144 is released again, the biasing spring pushes 139 the valve 138 back on the seat 142. A The piston 132 moves after the trigger is released is prevented by venting the air from the housing 134 through the conduit 141, the chamber 142 and the exit duct 143 will. With this arrangement, the advancing movement of the piston 132 for squeezing out the contents of the cartridge can be made stepwise control precisely.

The fistole shown in FIGS. 12, 13 has a semi-cylindrical one Support 145 which receives a cartridge, the blunt end of which is axially aligned with the piston surfaces. the Curvature of the seat is slightly larger than the outside diameter of the cartridge. The cartridge cover 23 is located on the front slotted cap 146 through which the neck 24 protrudes. A handle 147 is on the rear of the frame of the support firmly attached. A frame ring 148 extends upwardly from the point of attachment of the handle 147.

A piston arrangement 149 is arranged in the ring 148 and is guided by this in its linear movement. The coaxial The carrier elements 150, 151 are elements of the piston arrangement and the piston elements 152, 153 · the sleeve-like carrier 150 includes a long slot 154 on its underside through which frame members protrude from handle 147 into the interior thereof. The rod or carrier 151 is mounted coaxially in the sleeve 150.

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Teeth or notches 155 on the inside of the rod 151 serve as stepping elements which cooperate with the pawl elements 156, 157 in order to advance the piston arrangement step by step. The support elements 150 ₅ 151 are connected to one another at a radial joint formed by a rear inward shoulder 158 on the sleeve 150 between the collars 159 »160, which are rigidly attached to the rear end of the rod 151. This connection allows a radial movement of the rod 151 relative to the sleeve 150, but unites the two carrier elements for common linear movement. A disc-shaped piston 152 is mounted on the front end of the rod, while the front end of the sleeve 150 carries an annular piston 153.

The ratchet-like feed device has one of the abaiig lever actuated pawl 156, which is pressed by a spring against the rod 151 and thus into the teeth of the rod. If the trigger 161 is pulled towards the handle, the pawl 156 engages in a notch or behind a tooth of the rod I5I and advances the entire piston assembly one step. A stationary latch 157? those from a feather to the rod I5I is biased towards, keeps the rod 151 hot in the rest position located trigger against retraction. The trigger 161 is under the spring release from the handle, and moves the Pawl 156 backwards in this way, after which it is ready for a further advance step of the piston assembly. The frame elements, through the slot 154 in the sleeve 150

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stand, run around the rod I5I as a support or collar and guide him in his movement. The ring 148 on the main frame as well as those protruding from the handle through the slot 154 Frame elements guide the linear movement of the sleeve 154. The piston assembly can be returned from the fully advanced position by moving the rod with the handle 163 rotates 90 ° and then pulls it backwards. Since a pawl advance a certain backward movement of the piston assembly Allowed between the feed steps, it is less useful than the others to achieve a feed text definition illustrated species.

Fig. 14 shows that the frame of a suitable arrangement can also essentially consist of a mounting ring 164 which has a fastening or holding device 165 on the inside contains, into which a cartridge can be screwed with its external thread on the blunt end. The ring 164 has furthermore an internally threaded ring 166 with a smaller diameter than the fastening and holding device 165 on, which lies behind this. The sleeve-like support element 167 is provided with an external thread that to the internal thread in ring 166 fits. The support rod 168 is on Handle part 169 of the sleeve element 167 attached - expediently with a connection that allows radial movement of the sleeve 1-67 relative to bar 168 allows. For example, a head I70 can open the rod 168 into a recess behind resilient lips 17I snap into place, which are molded into the handle 169. A disc

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shaped piston 172 and an annular piston 173 are on the other end of the rod 168 and the sleeve 167 attached. The pistons can each be mounted in such a way that they do not prevent the rotational movement of the associated carrier 167, 168 comprehend; this can be achieved with suitably designed annular grooves or recesses in the connecting structure. Preferably the squeeze gun is the jig. 14 complete made of relatively stiff plastic. Reference is made to the illustrated flattening of the closures 12, 15 when squeezing out the contents of the fatron through the Pistons.

The preferred application or squeezing device is connected to a feed mechanism that is not exclusively hand-operated is. The hydraulically (e.g. pneumatically or with another fluid) or an electrically driven one Feed device would therefore be preferred. The device can still be computer-programmed and thus work automatically.

Among the major advantages of the present invention are the following. The relationship between the various packaged parts of the cartridge's contents can easily be determined with the Set the relative dimensioning of the cartridge chambers. Standardized external dimensions can be adopted for the cartridge - e.g. the dimensions for the currently widely used cartridges for sealing compounds or larger or smaller dimensions.

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The proportion or volume ratio of the various components in the cartridge can be adjusted by choosing the diameter of the inner wall 16 accordingly. The content of the different chambers can be adjusted with a Zx ^ angsdosiereffekt squeeze to maintain the required ratio between them so that they are then homogeneously mixed and hardened can be. This advantage is the result of the coaxial arrangement, which eliminates the problem of delay or of the bypasses non-proportional dispensing of the contents of the cartridge that often occurs when side-by-side or side-by-side contractible chambers are used. The separate channels in the (blunt-ended) neck prevent mixing of the Components already in the throat and allow the contents to be squeezed out of a partially emptied cartridge later. Additionally the separate channels in the throat contribute to an extension of the usable pot life of the mixed components when pressing out, so that the user has a longer processing time before hardening. The release of exothermic heat from the mixing work in the mixing nozzle is relatively small, since the passage time through the nozzle is short - only a few seconds or the like - is. As a result of the present invention, 2-component systems with a very short Apply pot life (even less than a minute) very conveniently and appropriately on a work surface.

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L e r s

Claims (22)

BERLIN 33 8 MUNICH Dr. RUSCHKE & PARTNER ΚΑΚΗ PATENTANWÄ LT E StSL Tel. (030) 8263895/8284481 BERLIN -MÖNCHEN Tel. (089) 98 0324/98 7268 Telegram address: Telegram address: Quadratur Berlin Quadratur Munich TELEX: 183786 TELEX: 522767 A 1764 patent claims 1. Storage and dispatchable composite cartridge, which separately contains at least two different flowable substances which harden after homogeneous mixing, characterized by an elongated cylindrical main body with a round neck protruding outward from its head end and a piston-movable closure arrangement at its blunt end, with a rigid elongated cylindrical inner wall and a rigid elongated cylindrical outer wall within the main body, the inner and outer walls being coaxially arranged and spaced apart and terminating at the butt end of the main body in substantially the same transverse hub, the inner wall further having a central chamber and the Inside, with the outer wall, form an annular chamber in the main body and the middle chamber receives one and the singing chamber the other of the substances, through one first channel in the protruding neck, which is in flow communication only with the central chamber and at its outer end having an openable closure, through a second channel in the protruding neck which is in flow communication with only the annular chamber and at its outer End having an openable closure by an axially piston-displaceable disc-shaped closure, the is arranged within the inner wall close to this adjacent to the blunt cartridge end, by an axially piston-displaceable ring-shaped closure, which between the outer and the inner wall adjoining these tightly on the butt Cartridge end is arranged, the closures allow, by means of the piston, the different substances squeeze out of the cartridge at the same time dosed in a predetermined ratio, so that they are then mixed and are allowed to cure, by means arranged only at the head end of the cartridge, about the inner wall against relative movement with respect to the outer wall during the squeezing out of the cartridge contents by the piston, and by fastening means disposed on the neck for securing a mixing nozzle thereon. 2. Cartridge in combination with a device for the simultaneous metered dispensing of the separated substances from the cartridge, characterized in that the device has a frame, a piston arrangement of coaxial elements, which in the frame as a unit in a straight line relative to this 9098U / 07S6 are movably mounted and guided, the coaxial elements being a disk-shaped and an annular piston are, and a holding device on the frame which holds the cartridge so that the disc-shaped and the annular closure of the cartridge in front of the disc-shaped or the annular piston of the piston assembly and with these are each aligned 3. Cartridge according to claim 1, characterized in that the second channel is coaxial with and around the first channel. 4-. A cartridge according to claim 1, characterized in that the fastening means on the neck is a thread. 5. A cartridge according to claim 1, characterized in that at least one of the openable closures of the channels has a check valve structure. 6. Cartridge according to claim 1, characterized in that at least one of the closures disclosed is a plug which is tightly inserted and removable in the end of the associated channel. 7. Cartridge according to claim 1, characterized in that the openable closures of the first and second channels are a removable cap screwed onto the end of the neck. 8. A cartridge according to claim 1, characterized in that at least one of the openable closures of the channels is a cover plate that is uniform with the end of the associated channel. 9. Cartridge according to claim 1, characterized in that the openable closures are open and that a mixing nozzle is placed on the neck. 10. A cartridge according to claim 1, characterized in that the disk-shaped closure has a circumferentially extending annular skirt which scrapes along the inner wall during movement by a piston. 11. A cartridge according to claim 1, characterized in that the annular closure has an inner and an outer peripheral skirt which scrape along the inner and outer walls when moved by a piston. 12. Cartridge according to claim 1, characterized in that the disc-shaped closure is concave and the cavity thus formed faces the central chamber, the closure being expandable by pressing a piston against the inner wall. 13 · Cartridge after. Claim 1, characterized in that the annular closure is annularly concave and the resulting cavity faces the singing chamber, the closure being expandable by a piston against the inner and outer walls. Cartridge according to Claim 1, characterized in that the inner and outer walls contain an organic plastic. 15. Cartridge according to claim 1, characterized in that a removable outer protective cover is placed on the blunt end thereof. 16. A cartridge according to claim 1, characterized in that the first channel is connected to an inwardly directed annular circumferential shoulder at the head end of the inner wall, that the second channel is connected to an inwardly directed annular circumferential shoulder at the head end of the outer wall and that the device consists for supporting the inner wall against movement relative to the outer wall of radially spaced and essentially axially directed rigid wing elements between the inner wall shoulder and the outer wall shoulder. 17 · Cartridge according to claim 1, characterized in that the device for supporting the inner wall against movement a shoulder at the head end of the cartridge relative to the outer wall having. 18. Device for simultaneous metered squeezing of two separate substances from the head end of a cylindrical composite cartridge, at the blunt end of which are arranged coaxial closures movable by pistons, one of which is disc-shaped and the other is ring-shaped, characterized by a frame, one in the frame as a unit linearly mounted and guided movably relative to this piston arrangement with a disk-shaped piston attached to one end of a rod element and an annular piston attached to one end of a sleeve-like element, by a holding device on the frame which holds the cartridge so that the disk-shaped and the annular closure of the cartridge in front of the disc-shaped or the annular piston of the piston assembly and axially aligned therewith, and by an advancing device for advancing the piston assembly in a straight line with respect to the frame. 19. Device according to claim 18, characterized in that the holding device for the cartridge has a sleeve element which receives the cartridge. 20. The device according to claim Ί8, characterized in that the feed device is operated hydraulically. 21. The device according to claim 18, characterized in that the feed device is actuated pneumatically. 22. The device according to claim 18, characterized in that the feed device consists essentially of a stepping device on a component selected from the group consisting of the rod element and the sleeve-like element, and a device on the frame which engages the stepping device and cooperates with her.