EP0581158B1 - Foam cap - Google Patents

Foam cap Download PDF

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Publication number
EP0581158B1
EP0581158B1 EP93111538A EP93111538A EP0581158B1 EP 0581158 B1 EP0581158 B1 EP 0581158B1 EP 93111538 A EP93111538 A EP 93111538A EP 93111538 A EP93111538 A EP 93111538A EP 0581158 B1 EP0581158 B1 EP 0581158B1
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EP
European Patent Office
Prior art keywords
outlet
foam cap
wall
foam
extends
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP93111538A
Other languages
German (de)
French (fr)
Other versions
EP0581158A2 (en
EP0581158A3 (en
Inventor
Reinhard Neuhaus
Jens Heinrich Kersten
Detlef Schmitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aptar Dortmund GmbH
Original Assignee
Seaquist Perfect Dispensing GmbH
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Filing date
Publication date
Application filed by Seaquist Perfect Dispensing GmbH filed Critical Seaquist Perfect Dispensing GmbH
Publication of EP0581158A2 publication Critical patent/EP0581158A2/en
Publication of EP0581158A3 publication Critical patent/EP0581158A3/en
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Publication of EP0581158B1 publication Critical patent/EP0581158B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
    • B65D83/16—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means
    • B65D83/20—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant characterised by the actuating means operated by manual action, e.g. button-type actuator or actuator caps
    • B65D83/205—Actuator caps, or peripheral actuator skirts, attachable to the aerosol container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/0018—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam
    • B05B7/005—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow
    • B05B7/0056—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas with devices for making foam wherein ambient air is aspirated by a liquid flow with disturbing means promoting mixing, e.g. balls, crowns

Definitions

  • the invention relates to a foam head for a hand-operated pressure vessel with a dispensing valve, on the tubular valve stem of which the foam head can be plugged with a tubular outlet nozzle for actuating the dispensing valve, an outlet channel extending through the outlet nozzle and communicating with a plurality of outlet openings of the foam head, which are at open delivery valve are connected to the interior of the pressure vessel.
  • a foam head of this type is known from EP 452 208 A1. This foam head is multi-part and complicated, so that it is relatively expensive for disposable pressure vessels.
  • a foam head is also known, which is formed in several parts.
  • an approach is provided which can be placed on a nozzle of a dispensing head.
  • the approach contains a baffle in an expanding opening of the approach.
  • a grid is attached to the outlet opening of the attachment with the aid of a locking ring.
  • the approach free from the dispensing head is relatively sensitive to impact.
  • a foam head which can be produced as a one-piece molding from plastic, but can only be used in connection with a dispensing head placed on a dispensing valve of a pressure vessel.
  • this arrangement is also relatively complex both in terms of assembly and in terms of production technology.
  • the invention has for its object to improve a foam head of the aforementioned type so that it is economically producible for disposable pressure vessels and with the simplest construction allows excellent foaming of a foamable product contained in a pressure vessel.
  • the outlet nozzle can be surrounded by a conical upper part, which extends from the outer edge of the head wall to a lower, outer annular shoulder, from which a jacket projects downward, which has an upper part and a lower part, which corresponds approximately to an inner shoulder, with which the foam head can be supported on the edge of a container lid.
  • a conical upper part which extends from the outer edge of the head wall to a lower, outer annular shoulder, from which a jacket projects downward
  • the conical upper part is expediently provided on one side with a finger dent which extends approximately over the entire height of the upper part and intersects the head wall radially outside the baffle.
  • the hinge rib on the side of the finger dent enables the dispensing valve fastened in a pressure container to be actuated by exerting a lateral finger pressure on the foam head, which can thus be moved around the hinge rib in the direction of the dispensing valve to actuate the same.
  • the at least one predetermined breaking point opposite the joint rib is destroyed and makes the commissioning of the pressure container recognizable.
  • the finger dent is preferably placed at a distance above the outer shoulder and extends over approximately 90 ° of the circumference of the conical upper part.
  • the head wall is advantageously curved upwards and outwards and provided with eight outlet slots which extend radially outward in a star shape from the central baffle plate of the head wall and are open towards the top of the head wall.
  • This configuration not only gives the foam head a pleasing appearance, but it also enables foam to be dispensed without the foam on the operating hand of the person operating the pressure container when the pressure container is actuated by exerting finger pressure on the finger dent across the longitudinal axis of the foam head.
  • a particular advantage of the invention lies in the fact that the foam head consists of a one-piece plastic molding.
  • a foam head 10 is shown, which is made in one piece from plastic by injection molding for a hand-operated pressure container known per se and therefore not shown, with a dispensing valve, on the tubular valve stem of the foam head 10 can be plugged with a tubular outlet connector 12 for actuating the dispensing valve.
  • An outlet channel 14 extends through the outlet nozzle 12 and communicates with a plurality of outlet openings of the foam head 10, which are connected to the interior of the pressure container when the dispensing valve is open.
  • the outlet channel 14 is formed at its upper end as a thin-walled tube section 16.
  • the tube section 16 is closed at its upper end by a baffle plate 18.
  • the baffle plate 18 forms part of an outwardly and upwardly curved head wall 20 of the foam head 10.
  • the baffle plate has a diameter that corresponds to that of the pipe section 16.
  • An underside 19 of the baffle plate 18 facing the outlet channel 14 is of flat design and extends perpendicular to the longitudinal axis of the vertically directed outlet nozzle 12 or the outlet channel 14.
  • the underside of the baffle plate 18 is designed as a preferably tapering circular cone 21 which projects coaxially into the outlet channel 14.
  • the tube section 16 is provided over its circumference with eight passage slots 22 which extend parallel to the outlet channel 14 and are separated from one another by circumferential angles.
  • the passage slots 22 each open radially into an outlet slot 24 in the head wall 20. It can be seen that both the eight passage slots 22 and the eight outlet slots 24 each have the same dimensions.
  • the passage slots 22 and the outlet slots 24 are also each of the same width. As a result, a uniform foaming of the product is achieved through each of the passage slots 22 and the outlet slots 24.
  • each exit slot 24 extends radially outward from the lower end 28 of the associated through slot 22 to the base of a baffle 30.
  • the baffle 30 forms an acute angle with the outlet channel 14, which opens towards the head wall 20.
  • An upper end 32 of each baffle 30 is arranged at a height which is approximately two thirds of the height of the pipe section 16.
  • the product to be foamed is deflected by the baffle plate 18 against the baffle wall 30 and is foamed there again.
  • the cone 21 improves the deflection of the product against the baffle 30 by a cheaper Deflection angle.
  • the cone angle of the circular cone 21 is preferably chosen to be so obtuse that all current threads of the product deflected by the conical surface are directed against the baffle 30 in each outlet slot 24, so that the product is again and completely foamed on the baffle 30.
  • each exit slot 24 extends radially outward from the upper end 32 of the baffle 30 of each exit slot 24 to the vicinity of an outer edge 36 of the top wall 20.
  • the outlet connector 12 is surrounded by a conical upper part 38.
  • This conical upper part 38 extends from the outer edge 36 of the head wall 20 to a lower, outer ring shoulder 40.
  • a jacket 42 projects downward from the outer ring shoulder 40.
  • the jacket 42 consists of an upper part 44 and a lower part 46.
  • the upper part 44 and the lower part 46 are connected by an outer shoulder 48.
  • This outer shoulder 48 corresponds approximately to an inner shoulder 50 with which the foam head 10 can be supported on the edge of a container lid.
  • the lower part 46 of the jacket 42 is further provided with locking strips 52 which are arranged at a distance below the inner shoulder 50 over the circumference of an inner wall 54 of the lower jacket part 46. In this way, the locking strips 52 can engage under the edge of the container lid for fastening the foam head 10.
  • the conical upper part 38 of the foam head 10 is provided with a finger dent 56 on one side.
  • This finger dent 56 extends approximately over the entire height of the upper part 38 and cuts the head wall 20 radially outside the baffle wall 30, as shown in FIG. 6. As a result, even foaming of the product is ensured through all outlet slots.
  • the conical upper part 38 is connected to the outer shoulder 48 of the jacket 42 by a film hinge 58 on the side having the finger dent 56. Since this film hinge 58 is only provided on a circumferential angle that is less than 90 °, the conical upper part 38 can be actuated with respect to the jacket 42 around the film hinge 58 in the sense of actuating the dispensing valve by depressing its tubular valve stem.
  • the conical upper part 38 is connected to the annular shoulder 40 by at least one predetermined breaking web 60.
  • This predetermined breaking web 60 can be so strong that it forms a child safety device, ie can only be destroyed by adults. In addition, a destroyed predetermined breaking line indicates the use of the pressure pack.
  • the finger dent 56 is spaced above the annular shoulder 40 at 57 and extends over approximately 90 ° of the circumference of the conical upper part 38.
  • a rear side 62 of the finger dent 56 is connected to the outlet nozzle 12 at the upper two thirds of the height of the outlet nozzle 12. Due to the concave shape of the finger dent 56 and the connection to the outlet connector 12, the foam head 10 is of high strength, which on the other hand enables the material required for the production of the foam head to be saved.
  • the head wall 20 of the foam head 10 is curved upwards and outwards and has eight outlet slots 24 which extend in a star shape from the central baffle plate 18 of the head wall radially outwards and are open towards the top of the head wall 20 .
  • the foam head 10 is given an attractive appearance and enables an actuation for dispensing foam, in which the finger actuating the foam head 10 releases the dispensed foam remains unwetted.
  • the foam head 10 is a one-piece plastic molding, for. B. from polypropylene, economically producible and therefore very suitable for disposable pressure packs with products to be foamed.

Abstract

A foam cap (10) has an outlet nozzle (12) whose outlet channel (14) has at the upper end a tube section (16) whose upper end is closed by a baffle plate (18) and is provided with passage slots (22) which open out radially into an outlet slot (24) in the cap wall (20). An inner bottom (26) of each outlet slot (24) extends from the lower end (28) of each passage slot (22) radially outwards up to a baffle wall (30) which, with the outlet channel (14), forms an acute angle which opens towards the cap wall (20). An upper end (32) of each baffle wall (30) is arranged at a height which is approximately two thirds of the height of the tube section (16). An outer bottom (34) of each outlet slot (24) extends from the upper end (32) of the baffle wall (30) radially outwards almost up to an outer edge (36) of the cap wall (20). The foam cap can be produced economically as an integral plastic injection moulding and, with a very simple construction, allows excellent foaming of a foamable product contained in a pressure container. <IMAGE>

Description

Die Erfindung betrifft einen Schaumkopf für einen handbetätigten Druckbehälter mit einem Abgabeventil, auf dessen rohrförmigen Ventilschaft der Schaumkopf mit einem rohrförmigen Auslaßstutzen zur Betätigung des Abgabeventils aufsteckbar ist, wobei ein Auslaßkanal sich durch den Auslaßstutzen erstreckt und mit mehreren Auslaßöffnungen des Schaumkopfes in Verbindung steht, die bei geöffnetem Abgabeventil mit dem Innenraum des Druckbehälters verbunden sind.The invention relates to a foam head for a hand-operated pressure vessel with a dispensing valve, on the tubular valve stem of which the foam head can be plugged with a tubular outlet nozzle for actuating the dispensing valve, an outlet channel extending through the outlet nozzle and communicating with a plurality of outlet openings of the foam head, which are at open delivery valve are connected to the interior of the pressure vessel.

Ein Schaumkopf dieser Gattung ist aus der EP 452 208 A1 bekannt. Dieser Schaumkopf ist mehrteilig und kompliziert aufgebaut, so daß er für Einweg-Druckbehälter verhältnismäßig aufwendig ist.A foam head of this type is known from EP 452 208 A1. This foam head is multi-part and complicated, so that it is relatively expensive for disposable pressure vessels.

Aus der DE 36 44 237 A1 ist ebenfalls ein Schaumkopf bekannt, der mehrteilig ausgebildet ist. In diesem Fall ist ein Ansatz vorgesehen, der auf einen Stutzen eines Abgabekopfes aufsetzbar ist. Der Ansatz enthält eine Prallplatte in einer sich erweiternden Öffnung des Ansatzes. Auf der Austrittsöffnung des Ansatzes ist ein Gitter mit Hilfe eines Rastringes befestigt. Neben der aufwendigen, aus mehreren Teilen bestehenden Bauart ist der frei von dem Abgabekopf vorstehende Ansatz verhältnismäßig stoßempfindlich.From DE 36 44 237 A1 a foam head is also known, which is formed in several parts. In this case, an approach is provided which can be placed on a nozzle of a dispensing head. The approach contains a baffle in an expanding opening of the approach. A grid is attached to the outlet opening of the attachment with the aid of a locking ring. In addition to the complex, multi-part design, the approach free from the dispensing head is relatively sensitive to impact.

Ferner ist aus der französischen Patentanmeldung 2 588 490 ein Schaumkopf bekannt, der zwar als einteiliger Spritzling aus Kunststoff herstellbar ist, aber nur in Verbindung mit einem auf ein Abgabeventil eines Druckbehälter aufgesetzten Abgabekopf verwertbar ist. Infolgedessen ist auch diese Anordnung sowohl von der Montage her als auch herstellungstechnisch verhältnismäßig aufwendig.Furthermore, from French patent application 2 588 490 a foam head is known, which can be produced as a one-piece molding from plastic, but can only be used in connection with a dispensing head placed on a dispensing valve of a pressure vessel. As a result, this arrangement is also relatively complex both in terms of assembly and in terms of production technology.

Der Erfindung liegt die Aufgabe zugrunde, einen Schaumkopf der eingangs erwähnten bekannten Gattung so zu verbessern, daß er für Einweg-Druckbehälter wirtschaftlich herstellbar ist und bei einfachstem Aufbau eine hervorragende Verschäumung eines in einem Druckbehälter enthaltenen verschäumbaren Produktes ermöglicht.The invention has for its object to improve a foam head of the aforementioned type so that it is economically producible for disposable pressure vessels and with the simplest construction allows excellent foaming of a foamable product contained in a pressure vessel.

Die Erfindung ist zur Lösung dieser Aufgabe dadurch gekennzeichnet, daß

  • a) der Auslaßkanal an seinem oberen Ende als ein dünnwandiger Rohrabschnitt ausgebildet ist,
  • b) der Rohrabschnitt an seinem oberen Ende durch eine Prallplatte geschlossen ist, die einen Teil einer Kopfwand des Schaumkopfes bildet und deren Durchmesser demjenigen des Rohrabschnitts entspricht,
  • c) der Rohrabschnitt über seinen Umfang mit zum Auslaßkanal parallelen Durchtrittsschlitzen versehen ist, die durch Umfangswinkel voneinander getrennt sind und jeweils in einen Austrittsschlitz in der Kopfwand radial einmünden,
  • d) ein innerer Boden jedes Austrittsschlitzes sich vom unteren Ende des zugehörigen Durchtrittsschlitzes bis zum Fuß einer Prallwand radial nach außen erstreckt, die mit dem Auslaßkanal einen spitzen Winkel bildet, der sich zur Kopfwand hin öffnet,
  • e) ein oberes Ende jeder Prallwand auf einer Höhe angeordnet ist, die etwa zwei Drittel der Höhe des Rohrabschnitts beträgt,
  • f) ein äußerer Boden jedes Austrittsschlitzes sich von dem oberen Ende der Prallwand bis in die Nähe eines Außenrandes der Kopfwand radial nach außen erstreckt.
To achieve this object, the invention is characterized in that
  • a) the outlet channel is formed at its upper end as a thin-walled tube section,
  • b) the pipe section is closed at its upper end by a baffle plate which forms part of a head wall of the foam head and whose diameter corresponds to that of the pipe section,
  • c) the pipe section is provided over its circumference with through-slots parallel to the outlet channel, which are separated from one another by circumferential angles and each open radially into an outlet slot in the head wall,
  • d) an inner bottom of each outlet slot extends radially outwards from the lower end of the associated through slot to the base of a baffle wall which forms an acute angle with the outlet channel and opens towards the top wall,
  • e) an upper end of each baffle arranged at one level which is about two thirds of the height of the pipe section,
  • f) an outer bottom of each exit slot extends radially outward from the upper end of the baffle to the vicinity of an outer edge of the head wall.

Eine besonders gute Verschäumung läßt sich erzielen, wenn die Unterseite der Prallplatte, die dem Auslaßkanal zugekehrt ist, in Form eines Kegels in den Auslaßkanal hineinragt. Ferner empfiehlt es sich, sowohl die Durchtrittsschlitze als auch die Austrittsschlitze jeweils für sich gleich breit zu bemessen.Particularly good foaming can be achieved if the underside of the baffle plate, which faces the outlet channel, projects into the outlet channel in the form of a cone. Furthermore, it is advisable to dimension both the passage slots and the outlet slots equally wide.

Ferner kann der Auslaßstutzen von einem konischen Oberteil umgeben sein, der sich vom Außenrand der Kopfwand bis zu einer unteren, äußeren Ringschulter erstreckt, von der ein Mantel nach unten ragt, der einen oberen Teil und einen unteren Teil aufweist, der einer Innenschulter etwa entspricht, mit welcher der Schaumkopf auf dem Rand eines Behälterdeckels abstützbar ist. Hierbei ist es zweckmäßig, den unteren Teil des Mantels mit Rastleisten zu versehen, die im Abstand unterhalb der Innenschulter über den Umfang einer Innenwand des unteren Mantelteils angeordnet sind, derart, daß die Rastleisten den Rand des Behälterdeckels zur Befestigung des Schaumkopfes rastend untergreifen können.Furthermore, the outlet nozzle can be surrounded by a conical upper part, which extends from the outer edge of the head wall to a lower, outer annular shoulder, from which a jacket projects downward, which has an upper part and a lower part, which corresponds approximately to an inner shoulder, with which the foam head can be supported on the edge of a container lid. It is expedient to provide the lower part of the jacket with locking strips, which are arranged at a distance below the inner shoulder over the circumference of an inner wall of the lower jacket part, such that the locking strips can engage under the edge of the container lid for fastening the foam head.

Der konische obere Teil ist zweckmäßig an einer Seite mit einer Fingerdelle versehen, die sich etwa über die gesamte Höhe des Oberteils erstreckt und die Kopfwand radial außerhalb der Prallwand schneidet. In diesem Fall empfiehlt es sich ferner, dem konischen Oberteil, an der die Fingerdelle aufweisenden Seite durch eine Gelenkrippe mit der Außenschulter des Mantels sowie an der gegenüberliegenden Seite mit der Außenschulter durch mindestens einen Sollbruchsteg zu verbinden. Hierdurch ist die einteilige Herstellung des Schaumkopfes zusammen mit dem zur Befestigung auf einem Druckbehälter vorgesehenen Mantel möglich. Die Gelenkrippe an der Seite der Fingerdelle ermöglicht eine Betätigung des in einem Druckbehälter befestigten Abgabeventils durch Ausübung eines seitlichen Fingerdrucks auf den Schaumkopf, der auf diese Weise um die Gelenkrippe herum in Richtung des Abgabeventils zur Betätigung desselben bewegbar ist. Die der Gelenkrippe gegenüberliegende mindestens eine Sollbruchstelle wird dabei zerstört und macht die Inbetriebnahme des Druckbehälters erkennbar.The conical upper part is expediently provided on one side with a finger dent which extends approximately over the entire height of the upper part and intersects the head wall radially outside the baffle. In this case, it is also advisable to connect the conical upper part on the side with the finger dent to the outer shoulder of the jacket by means of a joint rib and on the opposite side to the outer shoulder by means of at least one predetermined breaking web. This makes the one-piece production of Foam head together with the jacket provided for attachment to a pressure vessel possible. The hinge rib on the side of the finger dent enables the dispensing valve fastened in a pressure container to be actuated by exerting a lateral finger pressure on the foam head, which can thus be moved around the hinge rib in the direction of the dispensing valve to actuate the same. The at least one predetermined breaking point opposite the joint rib is destroyed and makes the commissioning of the pressure container recognizable.

Bevorzugt ist die Fingerdelle im Abstand oberhalb der Außenschulter angesetzt und erstreckt sich über etwa 90° des Umfangs des konischen Oberteils.The finger dent is preferably placed at a distance above the outer shoulder and extends over approximately 90 ° of the circumference of the conical upper part.

Ferner ist es zweckmäßig, eine Rückseite der Fingerdelle mit dem Auslaßstutzen auf den oberen zwei Dritteln seiner Höhe zu verbinden. Hierdurch wird bei geringem Materialeinsatz eine hohe Stabilität des Schaumfkopfes erreicht.It is also useful to connect a back of the finger dent with the outlet port on the top two thirds of its height. As a result, a high stability of the foam head is achieved with a low use of material.

Vorteilhaft ist die Kopfwand nach oben und außen gewölbt und mit acht Austrittsschlitzen versehen, die sich sternförmig von der zentralen Prallplatte der Kopfwand radial nach außen erstrecken und zur Oberseite der Kopfwand hin offen sind. Durch diese Ausgestaltung erhält der Schaumkopf nicht nur ein gefälliges Aussehen, sondern er ermöglicht auch eine Schaumabgabe, ohne daß bei der Betätigung des Druckbehälters durch Ausübung eines Fingerdrucks auf die Fingerdelle quer zur Längsachse des Schaumkopfes Schaum auf die Bedienungshand der den Druckbehälter betätigenden Person gerät.The head wall is advantageously curved upwards and outwards and provided with eight outlet slots which extend radially outward in a star shape from the central baffle plate of the head wall and are open towards the top of the head wall. This configuration not only gives the foam head a pleasing appearance, but it also enables foam to be dispensed without the foam on the operating hand of the person operating the pressure container when the pressure container is actuated by exerting finger pressure on the finger dent across the longitudinal axis of the foam head.

Ein besonderer Vorteil der Erfindung besteht in der Tatsache, daß der Schaumkopf aus einem einteiligen Kunststoff-Spritzling besteht.A particular advantage of the invention lies in the fact that the foam head consists of a one-piece plastic molding.

Die Erfindung ist nachstehend anhand der schematischen Zeichnung eines Ausführungsbeispiels näher erläutert. Es zeigen:

Fig. 1
eine Seitenansicht eines Schaumkopfes mit seitlicher Fingerdelle;
Fig. 2
eine Draufsicht auf eine Symmetriehälfte des Schaumkopfes in Fig. 1;
Fig. 3
einen Mittellängsschnitt durch die Symmetrieebene III-III in Fig. 2;
Fig. 4
den Abschnitt X in Fig. 3 in vergrößertem Maßstab;
Fig. 5
eine Variente der Darstellung in Fig. 4; und
Fig. 6
eine Unteransicht des Schaumkopfes in Fig. 1.
The invention is based on the schematic Drawing of an embodiment explained in more detail. Show it:
Fig. 1
a side view of a foam head with lateral finger dent;
Fig. 2
a plan view of a symmetry half of the foam head in Fig. 1;
Fig. 3
a longitudinal section through the plane of symmetry III-III in Fig. 2;
Fig. 4
the section X in Figure 3 on an enlarged scale.
Fig. 5
a variant of the representation in Fig. 4; and
Fig. 6
a bottom view of the foam head in Fig. 1st

In den Figuren ist ein Schaumkopf 10 gezeigt, der einteilig im Spritzgießverfahren aus Kunststoff hergestellt ist für einen an sich bekannten und daher nicht dargestellten, handbetätigten Druckbehälter mit einem Abgabeventil,
   auf dessen rohrförmigen Ventilschaft der Schaumkopf 10 mit einem rohrförmigen Auslaßstutzen 12 zur Betätigung des Abgabeventils aufsteckbar ist. Ein Auslaßkanal 14 erstreckt sich durch den Auslaßstutzen 12 und steht mit mehreren Auslaßöffnungen des Schaumkopfes 10 in Verbindung, die bei geöffnetem Abgabeventil mit dem Innenraum des Druckbehälters verbunden sind.In the figures, a foam head 10 is shown, which is made in one piece from plastic by injection molding for a hand-operated pressure container known per se and therefore not shown, with a dispensing valve,
on the tubular valve stem of the foam head 10 can be plugged with a tubular outlet connector 12 for actuating the dispensing valve. An outlet channel 14 extends through the outlet nozzle 12 and communicates with a plurality of outlet openings of the foam head 10, which are connected to the interior of the pressure container when the dispensing valve is open.

Gemäß Fig. 3 und 4 ist der Auslaßkanal 14 an seinem oberen Ende als ein dünnwandiger Rohrabschnitt 16 ausgebildet. Der Rohrabschnitt 16 ist an seinem oberen Ende durch eine Prallplatte 18 geschlossen. Die Prallplatte 18 bildet einen Teil einer nach außen und oben gewölbten Kopfwand 20 des Schaumkopfes 10. Die Prallplatte hat einen Durchmesser, der demjenigen des Rohrabschnitts 16 entspricht. Eine dem Auslaßkanal 14 zugekehrte Unterseite 19 der Prallplatte 18 ist ebenflächig ausgebildet und erstreckt sich senkrecht zur Längsachse des vertikal gerichteten Auslaßstutzens 12 bzw. des Auslaßkanals 14.3 and 4, the outlet channel 14 is formed at its upper end as a thin-walled tube section 16. The tube section 16 is closed at its upper end by a baffle plate 18. The baffle plate 18 forms part of an outwardly and upwardly curved head wall 20 of the foam head 10. The baffle plate has a diameter that corresponds to that of the pipe section 16. An underside 19 of the baffle plate 18 facing the outlet channel 14 is of flat design and extends perpendicular to the longitudinal axis of the vertically directed outlet nozzle 12 or the outlet channel 14.

In Fig. 5 ist die Unterseite der Prallplatte 18 als vorzugsweise spitz zulaufender Kreiskegel 21 ausgebildet, der koaxial in den Auslaßkanal 14 hineinragt.5, the underside of the baffle plate 18 is designed as a preferably tapering circular cone 21 which projects coaxially into the outlet channel 14.

Der Rohrabschnitt 16 ist über seinen Umfang mit acht Durchtrittsschlitzen 22 versehen, die sich parallel zum Ausgangskanal 14 erstrecken und durch Umfangswinkel voneinander getrennt sind. Die Durchtrittsschlitze 22 münden jeweils radial in einen Austrittsschlitz 24 in der Kopfwand 20 ein. Es ist ersichtlich, daß sowohl die acht Durchtrittsschlitze 22 als auch die acht Ausstrittsschlitze 24 jeweils für sich gleiche Abmessungen aufweisen. Die Durchtrittsschlitze 22 und die Austrittsschlitze 24 sind auch jeweils gleich breit bemessen. Hierdurch wird eine gleichmäßige Verschäumung des Produktes durch jeden der Durchtrittsschlitze 22 und der Austrittsschlitze 24 erreicht.The tube section 16 is provided over its circumference with eight passage slots 22 which extend parallel to the outlet channel 14 and are separated from one another by circumferential angles. The passage slots 22 each open radially into an outlet slot 24 in the head wall 20. It can be seen that both the eight passage slots 22 and the eight outlet slots 24 each have the same dimensions. The passage slots 22 and the outlet slots 24 are also each of the same width. As a result, a uniform foaming of the product is achieved through each of the passage slots 22 and the outlet slots 24.

Ein innerer Boden 26 jedes Austrittsschlitzes 24 erstreckt sich vom unteren Ende 28 des zugehörigen Durchtrittsschlitzes 22 bis zum Fuß einer Prallwand 30 radial nach außen. Die Prallwand 30 bildet mit dem Auslaßkanal 14 einen spitzen Winkel, der sich zur Kopfwand 20 hin öffnet. Ein oberes Ende 32 jeder Prallwand 30 ist auf einer Höhe angeordnet, die etwa zwei Drittel der Höhe des Rohrabschnitts 16 beträgt.An inner bottom 26 of each exit slot 24 extends radially outward from the lower end 28 of the associated through slot 22 to the base of a baffle 30. The baffle 30 forms an acute angle with the outlet channel 14, which opens towards the head wall 20. An upper end 32 of each baffle 30 is arranged at a height which is approximately two thirds of the height of the pipe section 16.

Das zu verschäumende Produkt wird von der Prallplatte 18 gegen die Prallwand 30 umgelenkt und dort erneut verschäumt. Der Kegel 21 verbessert die Ablenkung des Produktes gegen die Prallwand 30 durch einen günstigeren Umlenkwinkel. Der Kegelwinkel des Kreiskegels 21 ist vorzugsweise so stumpf gewählt, daß alle Stromfäden des von der Kegelmantelfläche umgelenkten Produktes gegen die Prallwand 30 in jedem Austrittsschlitz 24 gerichtet sind, damit an der Prallwand 30 das Produkt erneut und vollständig verschäumt wird.The product to be foamed is deflected by the baffle plate 18 against the baffle wall 30 and is foamed there again. The cone 21 improves the deflection of the product against the baffle 30 by a cheaper Deflection angle. The cone angle of the circular cone 21 is preferably chosen to be so obtuse that all current threads of the product deflected by the conical surface are directed against the baffle 30 in each outlet slot 24, so that the product is again and completely foamed on the baffle 30.

Ein äußerer Boden 34 jedes Austrittsschlitzes 24 erstreckt sich von dem oberen Ende 32 der Prallwand 30 jedes Austrittsschlitzes 24 bis in die Nähe eines Außenrandes 36 der Kopfwand 20 radial nach außen.An outer bottom 34 of each exit slot 24 extends radially outward from the upper end 32 of the baffle 30 of each exit slot 24 to the vicinity of an outer edge 36 of the top wall 20.

Der Auslaßstutzen 12 ist von einem konischen Oberteil 38 umgeben. Dieser konische Oberteil 38 erstreckt sich vom Außenrand 36 der Kopfwand 20 bis zu einer unteren, äußeren Ringschulter 40. Ein Mantel 42 ragt von der äußeren Ringschulter 40 nach unten. Der Mantel 42 besteht aus einem oberen Teil 44 und einem unteren Teil 46. Der obere Teil 44 und der untere Teil 46 sind durch eine Außenschulter 48 verbunden. Diese Außenschulter 48 entspricht etwa einer Innenschulter 50, mit welcher der Schaumkopf 10 auf dem Rand eines Behälterdeckels abgestützt werden kann.The outlet connector 12 is surrounded by a conical upper part 38. This conical upper part 38 extends from the outer edge 36 of the head wall 20 to a lower, outer ring shoulder 40. A jacket 42 projects downward from the outer ring shoulder 40. The jacket 42 consists of an upper part 44 and a lower part 46. The upper part 44 and the lower part 46 are connected by an outer shoulder 48. This outer shoulder 48 corresponds approximately to an inner shoulder 50 with which the foam head 10 can be supported on the edge of a container lid.

Der untere Teil 46 des Mantels 42 ist ferner mit Rastleisten 52 versehen, die im Abstand unterhalb der Innenschulter 50 über den Umfang einer Innenwand 54 des unteren Mantelteils 46 angeordnet sind. Auf diese Weise können die Rastleisten 52 den Rand des Behälterdeckels zur Befestigung des Schaumkopfes 10 rastend untergreifen.The lower part 46 of the jacket 42 is further provided with locking strips 52 which are arranged at a distance below the inner shoulder 50 over the circumference of an inner wall 54 of the lower jacket part 46. In this way, the locking strips 52 can engage under the edge of the container lid for fastening the foam head 10.

Der konische Oberteil 38 des Schaumkopfes 10 ist an einer Seite mit einer Fingerdelle 56 versehen. Diese Fingerdelle 56 erstreckt sich etwa über die gesamte Höhe des Oberteils 38 und schneidet die Kopfwand 20 radial außerhalb der Prallwand 30 bogenförmig, wie Figur 6 zeigt. Infolgedessen ist eine gleichmäßige Verschäumung des Produktes durch sämtliche Ausstrittsschlitze sichergestellt.The conical upper part 38 of the foam head 10 is provided with a finger dent 56 on one side. This finger dent 56 extends approximately over the entire height of the upper part 38 and cuts the head wall 20 radially outside the baffle wall 30, as shown in FIG. 6. As a result, even foaming of the product is ensured through all outlet slots.

Der konische Oberteil 38 ist an der die Fingerdelle 56 aufweisenden Seite durch ein Filmscharnier 58 mit der Außenschulter 48 des Mantels 42 verbunden. Da dieses Filmscharnier 58 nur auf einem Umfangswinkel vorgesehen ist, der kleiner als 90° ist, kann der konische Oberteil 38 gegenüber dem Mantel 42 um das Filmscharnier 58 im Sinne einer Betätigung des Abgabeventils durch Niederdrücken von dessen rohrförmigem Ventilschaft betätigt werden. Auf der dem Filmscharnier 58 gegenüberliegenden Seite ist der konische Oberteil 38 mit der Ringschulter 40 durch mindestens einen Sollbruchsteg 60 verbunden. Dieser Sollbruchsteg 60 kann so stark ausgebildet sein, daß er eine Kindersicherung bildet, also nur von Erwachsenen zerstört werden kann. Darüber hinaus zeigt ein zerstörter Sollbruchsteg die Ingebrauchnahme der Druckpackung an.The conical upper part 38 is connected to the outer shoulder 48 of the jacket 42 by a film hinge 58 on the side having the finger dent 56. Since this film hinge 58 is only provided on a circumferential angle that is less than 90 °, the conical upper part 38 can be actuated with respect to the jacket 42 around the film hinge 58 in the sense of actuating the dispensing valve by depressing its tubular valve stem. On the side opposite the film hinge 58, the conical upper part 38 is connected to the annular shoulder 40 by at least one predetermined breaking web 60. This predetermined breaking web 60 can be so strong that it forms a child safety device, ie can only be destroyed by adults. In addition, a destroyed predetermined breaking line indicates the use of the pressure pack.

Die Fingerdelle 56 ist im Abstand oberhalb der Ringschulter 40 bei 57 angesetzt und erstreckt sich über etwa 90° des Umfangs des konischen Oberteils 38. Eine Rückseite 62 der Fingerdelle 56 ist mit dem Auslaßstutzen 12 auf den oberen zwei Dritteln der Höhe des Auslaßstutzens 12 verbunden. Durch die konkave Form der Fingerdelle 56 und die Verbindung mit dem Auslaßstutzen 12 erhält der Schaumkopf 10 eine hohe Festigkeit, die andererseits eine Einsparung des für die Herstellung des Schaumkopfes notwendigen Materials ermöglicht.The finger dent 56 is spaced above the annular shoulder 40 at 57 and extends over approximately 90 ° of the circumference of the conical upper part 38. A rear side 62 of the finger dent 56 is connected to the outlet nozzle 12 at the upper two thirds of the height of the outlet nozzle 12. Due to the concave shape of the finger dent 56 and the connection to the outlet connector 12, the foam head 10 is of high strength, which on the other hand enables the material required for the production of the foam head to be saved.

Wie aus den Figuren zu ersehen ist, ist die Kopfwand 20 des Schaumkopfes 10 nach oben und außen gewölbt und weist acht Austrittsschlitze 24 auf, die sich sternförmig von der zentralen Prallplatte 18 der Kopfwand radial nach außen erstrecken und zur Oberseite der Kopfwand 20 hin offen sind. Hierdurch erhält der Schaumkopf 10, wie insbesondere Figur 1 zeigt, ein ansprechendes Aussehen und ermöglicht eine Betätigung zur Schaumabgabe, bei welcher der den Schaumkopf 10 betätigende Finger von dem abgegebenen Schaum unbenetzt bleibt.As can be seen from the figures, the head wall 20 of the foam head 10 is curved upwards and outwards and has eight outlet slots 24 which extend in a star shape from the central baffle plate 18 of the head wall radially outwards and are open towards the top of the head wall 20 . As a result, as shown in particular in FIG. 1, the foam head 10 is given an attractive appearance and enables an actuation for dispensing foam, in which the finger actuating the foam head 10 releases the dispensed foam remains unwetted.

Der Schaumkopf 10 ist als einteiliger Kunststoff-Spritzling, z. B. aus Polypropylen, wirtschaftlich herstellbar und daher für Einweg-Druckpackungen mit zu verschäumenden Produkten sehr geeignet.The foam head 10 is a one-piece plastic molding, for. B. from polypropylene, economically producible and therefore very suitable for disposable pressure packs with products to be foamed.

Claims (11)

  1. Foam cap (10) for a manually actuated pressurised container with a dispensing valve, onto the tubular valve shaft of which a tubular outlet pipe (12) of the foam cap may be pushed to actuate the dispensing valve, an outlet passage (14) extending through the outlet pipe (12) and communicating with a plurality of outlet openings in the foam cap which are connected to the interior of the pressurised container when the dispensing valve is open,
    characterised in that
    a) the outlet passage (14) is constructed at its upper end as a thin walled tube section (16),
    b) the tube section (16) is closed at its upper end by a deflecting plate (18) which forms a part of an end wall (20) of the foam cap (10) and whose diameter corresponds to that of the tube section (16),
    c) the tube section (16) is provided over its periphery with slits (22) which arc parallel to the outlet passage (14) and which are angularly separated from one another and each open out radially into a respective outlet slit (24) in the end wall (20),
    d) an inner base (26) of each outlet slit (24) extends radially outwards from the lower end (28) of the associated slit (22) to the foot of a deflecting wall (30), which, together with the outlet passage (14), defines an acute angle which opens towards the end wall (20),
    e) an upper end (32) of each deflecting wall (30) is disposed at a height which is about two thirds of the height of the tube section (16),
    f) an outer base (34) of each outlet slit (24) extends radially outwards from the upper end (32) of the deflecting wall (30) into the vicinity of an outer edge (36) of the end wall (20).
  2. Foam cap as claimed in Claim 1, characterised in that the underside of the deflecting plate (18), which is directed towards the outlet passage (14), extends into the outlet passage (14) in the form of a cone (21).
  3. Foam cap as claimed in Claim 1 or 2, characterised in that the slits (22) and the outlet slits (24) are of the same breadth.
  4. Foam cap as claimed in one of Claims 1 to 3, characterised in that the outlet pipe (12) is surrounded by a conical upper portion (38), which extends from the outer edge (36) of the end wall (20) to a lower, outer annular shoulder (40), from which a shell (42) extends downwardly, which has an upper portion (44) and a lower portion (46) which are connected by an external shoulder (48) which approximately corresponds to an internal shoulder (50) with which the foam cap (10) may be supported on the edge of a container lid.
  5. Foam cap as claimed in Claim 4, characterised in that the lower portion (46) of the shell (42) is provided with locking ridges (52) which are disposed over the periphery of an inner wall (54) of the lower shell portion (46) spaced below the internal shoulder (50) in such a manner that the locking ridges (52) can engage lockingly below the edge of the container lid to fasten the foam cap (10).
  6. Foam cap as claimed in Claim 4 or 5, characterised in that the conical upper portion (36) is provided on one side with a finger depression (56) which extends approximately over the entire height of the upper portion (38) and intersects the end wall (20) radially outside the deflecting wall (30).
  7. Foam cap as claimed in claim 6,
    characterised in that the conical upper portion (38) is connected at that side which has the finger depression (56) by means of a film hinge (58) to the external shoulder (48) on the shell (42) and at the opposite side to the external shoulder (48) by means of at least one web (60) which is to be broken.
  8. Foam cap as claimed in one of Claims 6 or 7, characterised in that the finger depression (56) is positioned spaced above the external shoulder (48) and extends over about 90° of the periphery of the conical upper portion (38).
  9. Foam cap as claimed in one of Claims 6 to 8, characterised in that a rear surface (62) of the finger depression (56) is connected to the outlet pipe (12) over the upper two-thirds of the height of the outlet pipe (12).
  10. Foam cap as claimed in one of Claims 1 to 9, characterised in that the end wall (20) is curved upwardly and outwardly and has eight outlet slits (24) which extend radially outwardly in the manner of a star from the central deflecting plate (18) on the end wall (20) and are open towards the upper surface of the end wall (20).
  11. Foam cap as claimed in one of Claims 1 to 10, characterised in that it is a one-piece plastics injection moulding.
EP93111538A 1992-07-28 1993-07-19 Foam cap Expired - Lifetime EP0581158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224910A DE4224910C2 (en) 1992-07-28 1992-07-28 Foam head
DE4224910 1992-07-28

Publications (3)

Publication Number Publication Date
EP0581158A2 EP0581158A2 (en) 1994-02-02
EP0581158A3 EP0581158A3 (en) 1995-02-08
EP0581158B1 true EP0581158B1 (en) 1996-11-27

Family

ID=6464298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111538A Expired - Lifetime EP0581158B1 (en) 1992-07-28 1993-07-19 Foam cap

Country Status (4)

Country Link
US (1) US5340031A (en)
EP (1) EP0581158B1 (en)
AT (1) ATE145618T1 (en)
DE (2) DE4224910C2 (en)

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Also Published As

Publication number Publication date
ATE145618T1 (en) 1996-12-15
DE59304578D1 (en) 1997-01-09
DE4224910A1 (en) 1994-02-03
EP0581158A2 (en) 1994-02-02
US5340031A (en) 1994-08-23
DE4224910C2 (en) 1994-06-16
EP0581158A3 (en) 1995-02-08

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