EP1514611B1 - Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent - Google Patents

Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent Download PDF

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Publication number
EP1514611B1
EP1514611B1 EP04020848A EP04020848A EP1514611B1 EP 1514611 B1 EP1514611 B1 EP 1514611B1 EP 04020848 A EP04020848 A EP 04020848A EP 04020848 A EP04020848 A EP 04020848A EP 1514611 B1 EP1514611 B1 EP 1514611B1
Authority
EP
European Patent Office
Prior art keywords
piston
sealing
cartridge
sealing piston
spreader
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
EP04020848A
Other languages
German (de)
English (en)
Other versions
EP1514611A2 (fr
EP1514611A3 (fr
Inventor
Klaus Nehren
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.)
Kulzer GmbH
Original Assignee
Heraeus Kulzer GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heraeus Kulzer GmbH filed Critical Heraeus Kulzer GmbH
Publication of EP1514611A2 publication Critical patent/EP1514611A2/fr
Publication of EP1514611A3 publication Critical patent/EP1514611A3/fr
Application granted granted Critical
Publication of EP1514611B1 publication Critical patent/EP1514611B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B05C17/00579—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/01—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes with manually mechanically or electrically actuated piston or the like

Definitions

  • the invention relates to cartridges for receiving pasty material.
  • cartridges for receiving pasty material.
  • the use of cartridges is common today for many product groups. Apart from single-component and multi-component adhesives and sealants as well as printing inks, dental impression materials are also available in plastic or aluminum cartridges. Many of these products are damaged when stored in the cartridge or have only a short shelf life due to introduced air bubbles or diffusion through the packaging.
  • the air bubbles in the cartridge are created when the piston is inserted into the cartridge opening after filling. Since the pistons must have a sealing function to the cartridge wall, the air cushion located between the product and the piston is at least partially enclosed. Moisture-sensitive products may harden at the edges of trapped air.
  • Another problem for some products is the escape of ingredients or the ingress of moisture or other air components.
  • DE 100 29 799 A1 relates to a cartridge piston, in which the piston shoulder presses sealingly against the cartridge wall by delivery pressure of the discharge device onto a spreader ring molded into the piston.
  • DE 42 29 588 A1 describes a cartridge piston with an elastic piston crown and an end bead whose outer diameter is larger than the inner diameter of the cartridge.
  • EP 0 301 327B1 DE 8710233 U1
  • a cartridge piston is described, in which the piston shoulder presses sealingly against the cartridge wall by means of a clamping ring which can be inserted by clamping onto a piston molded into the piston.
  • DE 34 05 547 discloses a piston with an oblique to the cartridge wall annular groove into which an elastic sealing ring is inserted.
  • DE 34 35 576 is about a follower piston for a dispenser with a closable vent.
  • DE 36 35 849 A1 describes a ventable piston for dispensers with a molded-on closure part.
  • DE 23 02 364 A1 has the object of a ventable piston for cartridges with a molded in the centrally located vent channel molded plugs.
  • EP 1 209 098 A1 relates to a cartridge with pistons for processing tubular bags in conventional discharge pistols.
  • EP 281 755 B1 US 4,834,268
  • the piston has an annular groove in which an elastic sealing ring is inserted.
  • EP 344 491 B1 describes cartridges with a piston having a sealing ring and leading to a closable by means of screw vent hole radial venting channels.
  • EP 463 991 B1 relates to cartridges with a piston having a sealing ring and radial venting ducts leading to a vent bore with plugs.
  • EP 497 739 B1 Similar.
  • US 5,400,926 recommends cartridges with a piston, which has a sealing ring and a vent hole with plugs leading radial venting channels, wherein before the sealing ring sealing lips are still arranged, the circumferential groove opens into the venting channels.
  • DE 196 43 506 A1 the piston of a dispensing device for pressure relief after delivery is designed in two parts.
  • DE 197 14 331 A1 describes a cartridge piston having radially extending channels or grooves between the central vent hole and piston edge.
  • the generic US 4,452,3701 EP81145 A1 describes a device in which the bottom closure of a cartridge rectifier has a closure plate and a hollow piston portion whose outer wall surrounds a voltage applied to the container inner wall elastic lip.
  • An additional cover element (7) follows the contour of the closure plate and thus forms a peripheral edge (8) which can form a snap lock with the outer closure edge (9).
  • the object of the invention is therefore to provide cartridges that can be processed during the filling without air pockets, allow the simplest and quickest possible filling, offer good barrier properties against moisture, and have high mechanical strength so as not to deform under delivery pressure.
  • the cartridge can also be designed as a double or multiple cartridge.
  • the main feature of the piston are its two-part form of sealing and expansion piston with closable by the expansion piston vents.
  • the sealing piston is substantially elastically deformable or its material yields.
  • a relatively thin-walled sealing piston made of elastic or plastic material such as PE-LD, PE-HD, PP or TPE or blends as a plastic injection molding is easy and inexpensive to manufacture.
  • PTFE or various types of rubber which, however, can not be processed by injection molding and are therefore more expensive to manufacture. The selection of materials may be limited due to incompatibility with the product.
  • expansion piston made of a less flexible and much harder material.
  • the expansion piston is substantially rigid.
  • PP PE-HD, PA, POM a material with the required mechanical strength and barrier effect for the injection molding technology can be selected.
  • metals such as aluminum or steel is conceivable, but more expensive.
  • the expansion piston exerts forces radially outwards, which press the sealing piston more strongly against the cylindrical inner wall of the cartridge. This is e.g. to solve constructive by the expansion piston can be pressed into the sealing piston, and at several points larger dimensions than the corresponding cavity of the sealing piston can accommodate. This causes outward pressure forces. Preferably, the bouncing of the expansion piston in the sealing piston, so that a tight connection ensteht. This is easy to accomplish by locking means.
  • air pressure arising during the press-in or bounce process must be dissipated through openings in the expansion piston.
  • the air pressure can also be used to increase the pressure forces on the cavity of the sealing piston.
  • the sealing piston is advantageously already designed so that it is substantially in sliding connection with the cylinder wall, but still leaves vents, usually in a ring shape along the cylinder wall, free. These vents are closed after pressing the expansion piston. It is also advantageous if the sealing piston is convex or conical on the side facing the filling material. As a result, the displaced during filling air is directed to the vents.
  • the sealing piston 1 is hollow from the rear, has a plurality of circumferential rings 6, 7, 8 for sealing and stripping of the product 4 and is at all points in the diameter slightly smaller than the inner diameter of the cartridge tube third
  • the expansion piston 2 is advantageously shaped so that it can be bounced into the sealing piston 1 , rests on a bead 10 as possible on the upper sealing piston edge 8 to penetrate only slightly into the sealing piston, but until it is inserted into the cartridge by a front Bead 18 to be held in it.
  • the expansion piston 2 may have rings 11 and / or radially extending struts 16 in the cavity which may extend from the bottom 9 to the edge 17 .
  • Sealing and expansion pistons 1 + 2 are already used pre-assembled in the filling, the time and mechanical complexity, which is equivalent to a one-piece piston.
  • the sealing piston 1 has a bottom 5 which is arched or sharpened in the product-contacting direction in order to establish contact with the product first in the center of the cartridge tube 3 . Since the piston crown edge 6 and all subsequent sealing rings 7/8 have a slightly smaller diameter than the cartridge tube 3 inside, the remaining air 20 is displaced by the product 4 during further insertion. Only when the product 4 fills the thin gap between the cartridge wall 3 and piston bottom edge 6 increases suddenly the force to push the piston further.
  • the expansion piston 2 is pressed until it stops in the sealing piston 1 , wherein the sealing rings 6/7 of the sealing piston 1 expand to the cartridge wall 3 and its bottom 5 applies by stretching to the bottom 9 of the expansion piston 2 .
  • the locking means 21 By the locking means 21 , this position is maintained.
  • a barrier film 14 of, for example aluminum or EVOH is inserted into the sealing piston 1 for particularly sensitive products.
  • the foil is on the Inside the sealing piston provided and remains after insertion and locking of the expansion piston between spreading and sealing piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Coating Apparatus (AREA)
  • Braking Arrangements (AREA)
  • Actuator (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Package Specialized In Special Use (AREA)

Claims (4)

  1. Cartouche destinée à recevoir un matériau de type pâteux, comprenant,
    un corps de cartouche (3) de forme cylindrique,
    un piston en deux parties ou davantage, comportant un piston d'étanchéité (1) et un piston d'expansion (2) qui peut être introduit dans une cavité du piston d'étanchéité,
    cartouche dans laquelle
    a) le piston d'étanchéité (1) possède des dimensions extérieures légèrement moindres que la paroi intérieure (3) de la cartouche, de manière à laisser libre des ouvertures de purge d'air (en 6, 7) entre le piston d'étanchéité (1) et la paroi intérieure (3),
    b) le piston d'expansion (2) possède, au moins en certains endroits, des dimensions extérieures plus grandes que celles pouvant être reçues par la cavité prévue à son effet dans le piston d'étanchéité,
    c) le piston d'expansion (2) est pourvu sur le côté extérieur, d'un moyen d'encliquetage (21) présentant son complément sur le côté intérieur du piston d'étanchéité,
    caractérisée
    d) en ce que sur le côté intérieur du piston d'étanchéité (1) est prévue une feuille d'étanchéité (14) supplémentaire, qui, après introduction et enclenchement du piston d'expansion, reste en place entre le piston d'expansion et le piston d'étanchéité.
  2. Cartouche selon la revendication 1, caractérisée en ce que la liaison géométrique par complémentarité de formes entre la paroi intérieure (3) de la cartouche et le piston d'étanchéité (1) s'effectue par l'intermédiaire de bagues (6, 7, 8).
  3. Cartouche selon la revendication 1 ou la revendication 2, caractérisée en ce que le piston d'étanchéité (1) porte les bagues (6, 7, 8).
  4. Cartouche selon l'une des revendications 1 à 3, caractérisée en ce que le piston d'étanchéité (1) est réalisé convexe ou conique sur son côté (5) dirigé vers le produit de remplissage (4).
EP04020848A 2003-09-10 2004-09-02 Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent Expired - Lifetime EP1514611B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10342090 2003-09-10
DE10342090A DE10342090B4 (de) 2003-09-10 2003-09-10 Verschlusskolben für Kartuschen mit Entlüftung und Barriereeigenschaften

Publications (3)

Publication Number Publication Date
EP1514611A2 EP1514611A2 (fr) 2005-03-16
EP1514611A3 EP1514611A3 (fr) 2007-12-26
EP1514611B1 true EP1514611B1 (fr) 2009-12-09

Family

ID=34129767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04020848A Expired - Lifetime EP1514611B1 (fr) 2003-09-10 2004-09-02 Piston de fermeture de cartouches ayant des propriétés de barrière et d'évent

Country Status (5)

Country Link
US (1) US7353972B2 (fr)
EP (1) EP1514611B1 (fr)
JP (1) JP2005082245A (fr)
AT (1) ATE451183T1 (fr)
DE (2) DE10342090B4 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007016705U1 (de) * 2007-11-28 2009-04-09 Inatec Gmbh Beutelschmelzer
DE102008000841B8 (de) * 2008-03-26 2014-07-10 Adcatec Gmbh Kartusche und Kolben mit Entlüftungsvorrichtung
DE102008022999A1 (de) * 2008-05-09 2009-11-12 Fischerwerke Gmbh & Co. Kg Kolben für eine Kartusche und Kartusche
DE102008063502A1 (de) 2008-12-17 2010-06-24 Fischbach Kg Kunststoff-Technik Auspresswerkzeug
CA2765795A1 (fr) * 2009-06-18 2010-12-23 Sulzer Mixpac Ag Cartouche a plusieurs constituants munie d'un dispositif d'evacuation de l'air
KR102069165B1 (ko) * 2011-10-17 2020-01-22 술저 믹스팩 아게 카트리지, 카트리지를 생산하기 위한 방법, 및 다성분 카트리지
KR102023143B1 (ko) * 2012-11-08 2019-09-19 술저 믹스팩 아게 2개 이상의 유동성 성분을 위한 카트리지
US9469061B2 (en) 2013-01-30 2016-10-18 Plas-Pak Industries Inc One-piece ventable piston for a dispensing apparatus, a dispensing apparatus with same, and method of making same
CN109625637B (zh) * 2019-02-01 2024-04-12 天舟医疗(苏州)有限公司 一种给料装置
EP4464424A1 (fr) 2023-05-15 2024-11-20 Henkel AG & Co. KGaA Cartouche comprenant une unité de piston avec piston interne fendu

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US3028052A (en) * 1959-06-01 1962-04-03 John E Archer Mold-filling device
DE2302364C3 (de) * 1973-01-18 1975-07-31 Alfred Fischbach Kg Kunststoff- Spritzgusswerk, 5252 Ruenderoth Als Ausdrückkolben für plastische Masse dienender Verschluß aus elastischem Werkstoff für einen hohlzylindrischen Strangpreßbehälter
DE3148490C2 (de) * 1981-12-08 1986-02-13 Alfred Fischbach Kg Kunststoff-Spritzgusswerk, 5250 Engelskirchen Bodenverschluß für einen hohlzylindrischen Strangpreßbehälter
DE3405547A1 (de) * 1984-02-16 1985-08-14 Hilti Ag, Schaan Auspresskolben fuer behaelter
DE3435576A1 (de) * 1984-09-27 1986-04-10 Josef Wischerath GmbH & Co KG, 5000 Köln Spender fuer pastoese produkte
DE3635849C2 (de) * 1986-10-22 1994-03-17 Megaplast Dosiersysteme Spender
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Also Published As

Publication number Publication date
EP1514611A2 (fr) 2005-03-16
DE10342090A1 (de) 2005-04-28
ATE451183T1 (de) 2009-12-15
US7353972B2 (en) 2008-04-08
JP2005082245A (ja) 2005-03-31
EP1514611A3 (fr) 2007-12-26
DE10342090B4 (de) 2007-06-06
US20050087565A1 (en) 2005-04-28
DE502004010477D1 (de) 2010-01-21

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