EP2520375B1 - Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen - Google Patents

Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen Download PDF

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Publication number
EP2520375B1
EP2520375B1 EP12001294.3A EP12001294A EP2520375B1 EP 2520375 B1 EP2520375 B1 EP 2520375B1 EP 12001294 A EP12001294 A EP 12001294A EP 2520375 B1 EP2520375 B1 EP 2520375B1
Authority
EP
European Patent Office
Prior art keywords
sealing lip
plunger
piston
ribs
cartridge
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.)
Active
Application number
EP12001294.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2520375A3 (de
EP2520375A2 (de
Inventor
Frank Ritter
Oliver Wolf
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.)
Ritter GmbH
Original Assignee
Ritter 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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=44658415&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2520375(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ritter GmbH filed Critical Ritter GmbH
Priority to PL12001294T priority Critical patent/PL2520375T3/pl
Publication of EP2520375A2 publication Critical patent/EP2520375A2/de
Publication of EP2520375A3 publication Critical patent/EP2520375A3/de
Application granted granted Critical
Publication of EP2520375B1 publication Critical patent/EP2520375B1/de
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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

Definitions

  • the invention relates to a closure and Ausdschreibkolben of elastic plastic for cartridges for plastic masses.
  • Such pistons usually consist of a piston plate which extends over the cartridge cross-section and a cylindrical skirt which adjoins it in the reverse direction.
  • sealing lips At its outer periphery of the piston is formed with sealing lips, which cooperate with the cartridge inner wall.
  • piston At least two axially spaced, provided for backward sealing lips.
  • the conventional, only backward-facing sealing lips of the piston are not sufficient for a clean seal, as when expressing the back pressure of the material acts on the sealing lips, so that they do not more perfectly tight against the cartridge wall and form standing Gumaterialfilme between the sealing lips and the cartridge wall. It has therefore begun to provide at the front of the piston a forward-facing sealing lip, which is pressed more strongly with increasing extrusion pressure by the back pressure of the filling material to the cartridge inner wall, so that the seal automatically reinforces and results in better sealing results.
  • a structurally designed such piston is made, for example DE 20 2008 007 834 U1 known.
  • the object of the invention is therefore to improve such a piston with forward-facing sealing lip so that the problems when inserting the piston in the open rear cartridge end can be significantly mitigated.
  • the piston according to the invention consists of a curved piston plate 1 and a cylindrical skirt 2 adjoining it backwards. On the circumference of the skirt 2, axially spaced, rearwardly facing and cooperating with the cartridge inner wall sealing lips 3 are arranged in the usual way.
  • the transition region 4 is formed at the slightly forwardly curved piston plate 1 and the skirt 2 in cross-section V-shaped, whereby an obliquely forward and outwardly facing sealing lip 5 is formed.
  • This forward facing sealing lip 5 comes to the main sealing function when expressing the filling material from the cartridge.
  • a crown-like arrangement of ribs 6 arranged on the forward-facing sealing lip 5 is provided in both illustrated embodiments of the piston.
  • These ribs 6 are arranged on the piston axis facing inside of the sealing lip 5. They are formed as radial ribs which extend slightly forward over the sealing lips and have an outwardly facing, obliquely rearwardly and outwardly extending ramp surface 7, which merges into the sealing lip edge surface 8.
  • These ramp surfaces 7 of the ribs 6 form centering and insertion aids for the sealing lip 5 when inserting the piston in the rear open cartridge end.
  • These small ribs 6 are connected to no other part of the piston except the sealing lip 5, so that the elastic sealing lip 5 is not hindered in its elastic mobility at any point of its circumference.
  • Each of these small ribs 6 is also quite narrow, so that in this respect also the elastic mobility and conformability of the sealing lip 5 is not hindered with its sealing edge on the inner wall of the cartridge.
  • FIGS. 1a to 1c and 2a to 2c differ, in particular from the respective plan view ( FIG. 1b and FIG. 2b ), in that in the first embodiment ( FIGS. 1a to 1c ) the ribs 6 are arranged distributed with equal circumferential distances on the circumference of the sealing lip while in the second embodiment ( FIGS. 2a to 2c ) the ribs 6 are arranged on both sides of a symmetrical with respect to a diameter line corresponding to a transverse axis, which in the plan view FIG. 2b indicated by dash-dotted lines. In this case, the ribs 6 respectively closest to this transverse axis are separated from each other by a distance which is significantly greater than the distances between the remaining ribs.
  • a venting function of the piston during insertion into the rear cartridge end can be promoted if a setting tool in the region of the transverse axis presses more strongly on the rear side of the piston plate than on its remaining peripheral region.
  • the piston is slightly warped when inserting with a certain bending movement about the transverse axis, so that the sealing of the forward facing sealing lip can not be made exactly over the entire piston circumference, but rather the sealing lip is leaked at diametrically opposite areas and a vent of between the piston and the filling compound located in the cartridge can take place.
  • the piston then returns to its exact round position, and the forward-facing sealing lip 5 seals over its entire circumference with the cartridge inner wall.
  • the piston plate 1 has on its rear side an inner, approximately cylindrical recessed annular projection 9, which engages the setting tool with its axial pressing pressure when inserting the piston in the rear end of the cartridge.
  • an obliquely rearwardly and inwardly extending annular projection 10 is formed on the outer region of the piston plate rear side, which engages in the expression of the cartridge of the extrusion die. The then acting axially on the piston pressing force not only causes a forward sliding of the piston, but tries to spread the sealing lip 5 to the outside. As a result, in particular in connection with the counterpressure of the filling material acting on the sealing lip 5, the sealing lip 5 with its sealing edge is pressed firmly against the inner wall of the cartridge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP12001294.3A 2011-05-04 2012-02-28 Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen Active EP2520375B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12001294T PL2520375T3 (pl) 2011-05-04 2012-02-28 Tłok zamykający i wyciskający do wkładów do mas plastycznych

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202011100254U DE202011100254U1 (de) 2011-05-04 2011-05-04 Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen

Publications (3)

Publication Number Publication Date
EP2520375A2 EP2520375A2 (de) 2012-11-07
EP2520375A3 EP2520375A3 (de) 2012-12-05
EP2520375B1 true EP2520375B1 (de) 2014-07-30

Family

ID=44658415

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12001294.3A Active EP2520375B1 (de) 2011-05-04 2012-02-28 Verschluss- und Ausdrückkolben für Kartuschen für plastische Massen

Country Status (3)

Country Link
EP (1) EP2520375B1 (pl)
DE (1) DE202011100254U1 (pl)
PL (1) PL2520375T3 (pl)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108642A1 (de) 2021-04-07 2022-10-13 Ritter Gmbh Nachlaufender Kolben mit Stützlippe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2649967B1 (fr) * 1989-07-19 1991-09-20 Cebal Procede d'introduction d'un opercule a coulissement etanche dans un corps tubulaire cylindrique et dispositif correspondant
DE20319464U1 (de) * 2002-12-10 2004-04-22 Topic, Anton Kolben für eine Kartusche zum Aufbewahren und Auspressen von pastösen Substanzen und Kartusche mit demselben
US7913881B2 (en) * 2003-11-13 2011-03-29 Meritool Llc Viscous material dispenser piston

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021108642A1 (de) 2021-04-07 2022-10-13 Ritter Gmbh Nachlaufender Kolben mit Stützlippe
US11835139B2 (en) 2021-04-07 2023-12-05 Ritter Gmbh Trailing piston having a support lip

Also Published As

Publication number Publication date
DE202011100254U1 (de) 2011-08-22
EP2520375A3 (de) 2012-12-05
EP2520375A2 (de) 2012-11-07
PL2520375T3 (pl) 2014-12-31

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