EP0628354A1 - Dichtungsstopfer - Google Patents

Dichtungsstopfer Download PDF

Info

Publication number
EP0628354A1
EP0628354A1 EP94304071A EP94304071A EP0628354A1 EP 0628354 A1 EP0628354 A1 EP 0628354A1 EP 94304071 A EP94304071 A EP 94304071A EP 94304071 A EP94304071 A EP 94304071A EP 0628354 A1 EP0628354 A1 EP 0628354A1
Authority
EP
European Patent Office
Prior art keywords
plug member
cavity
sealing
plug
sealing plug
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.)
Granted
Application number
EP94304071A
Other languages
English (en)
French (fr)
Other versions
EP0628354B1 (de
Inventor
Leslie Rowland Marchant
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.)
EUROBOND ADHESIVES Ltd
Original Assignee
EUROBOND ADHESIVES Ltd
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 EUROBOND ADHESIVES Ltd filed Critical EUROBOND ADHESIVES Ltd
Publication of EP0628354A1 publication Critical patent/EP0628354A1/de
Application granted granted Critical
Publication of EP0628354B1 publication Critical patent/EP0628354B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • B05C17/00576—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
    • 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
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container

Definitions

  • the present invention relates to sealing plugs which may be used for closing apertures.
  • the invention has particular but not exclusive relevance to sealing plugs for use in closing apertures in containers containing flowable products, e.g. adhesive dispensers.
  • syringe-type dispensers having a barrel with an open charging end through which the product is introduced into the dispenser and having at the opposite end a nozzle through which the product is to be dispensed. After the flowable product has been introduced into the barrel, it is necessary to seal the charging end with a suitable plug. In use, the nozzle end is opened and a suitable gun is used to force the sealing plug down the barrel as a syringe plunger to expel the contents.
  • WO90/05096 discloses a sealing arrangement for an adhesive dispenser intended to tackle this problem by enabling one to avoid the use of O-rings.
  • This provides a sealing plug having a front face including a bleed passage extending to the rear of the sealing plug where there is formed a cavity.
  • a stopper is provided for sealing the cavity which includes a projecting pin which enters into the rear of the bleed passage and closes it when the stopper is pressed home into the back of the sealing plug.
  • Such arrangements suffer from the disadvantage that the sealing plug cannot be fully assembled before being inserted into the syringe barrel. It is necessary to first push the main body of the sealing plug into position and only then to press the stopper into its home position.
  • flowable product may pass up through the bleed aperture and fill the cavity in the back of the sealing plug sufficiently that pushing the stopper home has the effect of displacing a certain amount of flowable product out of the back of the cavity.
  • it is difficult to get a good enough seal in such an arrangement without an 0-ring because the sealing plug does not have enough rigidity to exert sufficient radial force against the barrel.
  • the cavity allows the sealing plug to be too radially compressible. This cannot be counteracted by making the stopper a tight fit in the cavity because when the stopper is to be driven in, the sealing plug will press into the barrel, displacing the contents, if too much force is required.
  • the present invention provides a sealing plug for closing an aperture comprising a front plug member and rear plug member, the front plug member having an external periphery for sealingly engaging the internal periphery of a said aperture and having a front face for introduction into the aperture which front face contains a bleed passage extending from said front face to connect with a cavity open to the rear of said front plug member, the rear plug member being sealingly and resiliently received in said cavity to close the same, wherein said rear plug member is displaceable by gas pressure applied via said bleed passage so as momentarily to break the seal between the cavity and rear plug member and allow the venting of said gas pressure past said rear plug member.
  • the invention provides a sealing plug for sealing a container containing a flowable product, which sealing plug comprises a bleed passage extending from a front part thereof for introduction into said container to an interior portion of said sealing plug, and means actuatable by pressure of gas trapped between said sealing plug and said product for venting said interior portion of said sealing plug so as to release said trapped gas without permitting said product to pass said sealing plug.
  • the cavity and the rear plug member are circular in cross-section and the resilient sealing connection therebetween is by virtue of an annular rib and an annular groove provided each on a respective one of said cavity interior and said rear plug member.
  • the annular groove is on the rear plug member and the annular rib is on the wall of the cavity.
  • gas bleed passage extending from said annular groove out of said sealing plug and a gas bleed passage leading to said annular groove from said cavity in the front plug member.
  • each said gas bleed passage leading to or from said annular groove is formed by a groove in the periphery of the rear plug member.
  • the gas bleed passage leading out of the annular groove may be formed in the wall of the front plug member defining the outer part of the cavity.
  • the gas bleed passages leading to and from said annular groove are off-set angularly from one another.
  • the front face of the rear plug member and the base of the cavity in the front plug member are so shaped that when the rear plug member is fully home in the cavity, a portion of the volume of the cavity remains unfilled by the rear plug member to accommodate flowable product and any residual trapped gas.
  • a sealing plug comprises a front plug member 10 and a rear plug member 12 both of circular transverse cross-section.
  • Front plug member 10 has an external periphery 14 shaped to form a good seal in a tubular syringe bore by the provision of two annular sealing ribs 16 toward the rear end of the front plug member and an outwardly flared front portion 18.
  • the front face 20 of the front plug member is inwardly dished.
  • a generally cylindrical cavity 22 is formed in the rear face of the front plug member and a gas bleed passage 24 extends from the front face to the base 26 of the cavity 22.
  • An annular rib 28 is provided on the interior wall of the cavity 22 approximately mid-way into the depth thereof.
  • the rear plug member has a plane rear face 30 and dished front face 32 separated by a generally cylindrical side wall having annular groove 34 formed therein for co-operation with the annular rib 28 to form a liquid tight seal when the groove and rib are fully engaged.
  • a first longitudinally running groove 36 is provided extending from the annular groove 34 to the rear face 30 of the rear plug member.
  • a second longitudinally running groove 38 is provided extending from the annular groove 34 to the front face 32 of the rear plug member.
  • the forward part of the cylindrical wall of the rear plug member is chamfered to provide an annular angularly forward facing surface 40 which co-operates with a similarly angled annular surface 42 formed between the base and the side wall of the cavity 22 and assists in forming a liquid tight seal when the rear plug member is fully home in the cavity.
  • the rear plug member 12 Prior to introduction into the barrel of a syringe containing a flowable material, the rear plug member 12 is pressed into the cavity 22 of the front plug member 10 as shown in Figure 2. A seal is established between the cylindrical periphery of the rear plug member 12 and the interior wall of the cavity 22. By virtue of the dished front face 32 of the rear plug member 12, there is a volume within the cavity which is unfilled by the rear plug member 12.
  • the front of the sealing plug is introduced into the charging aperture of a syringe containing a flowable material such as adhesive or an adhesive component, the sealing plug is pressed into the syringe by means such as a hollow piston acting on the rear of the front plug member but not pressing on the rear plug member as indicated by the arrows in Figure 2.
  • Air trapped within the syringe body between the flowable product contained therein and the front face 20 of the sealing plug is displaced through the gas bleed passage 24 into the unfilled volume of the cavity 22 where it is pressurised until it forces back the rear plug member 12 against the resilience provided by the engagement of the annular groove 34 and the annular rib 28.
  • the gas can vent into the annular groove 34 through the longitudinally extending gas bleed groove 38, can track around the annular groove and exit from the sealing plug by the longitudinally extending gas bleed groove 36.
  • the rear plug member 12 will be pushed forward by the pressure of the rib 28 cutting off this escape route.
  • a piston acting both on the rear plug member and on the rear face of the front plug member can be used to drive the sealing plug down the bore of the syringe.
  • More than one groove 36 and/or more than one groove 38 may be provided if desired but this is likely to be disadvantageous.
  • the invention is not restricted to sealing plugs for syringes but can be used in many other contexts where it may be desired to vent gas from the front face of a sealing plug whilst retaining flowable contents or simply to relieve pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Glass Compositions (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP94304071A 1993-06-11 1994-06-07 Dichtungsstopfer Expired - Lifetime EP0628354B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9312052 1993-06-11
GB9312052A GB2278836B (en) 1993-06-11 1993-06-11 Sealing plug

Publications (2)

Publication Number Publication Date
EP0628354A1 true EP0628354A1 (de) 1994-12-14
EP0628354B1 EP0628354B1 (de) 1999-09-01

Family

ID=10736992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94304071A Expired - Lifetime EP0628354B1 (de) 1993-06-11 1994-06-07 Dichtungsstopfer

Country Status (4)

Country Link
EP (1) EP0628354B1 (de)
AT (1) ATE183951T1 (de)
DE (1) DE69420315T2 (de)
GB (1) GB2278836B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028337A1 (en) * 1994-04-13 1995-10-26 Adlock Packaging Limited Sealing a flowable product in a dispenser

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351517A1 (de) * 1988-06-17 1990-01-24 GUALA S.p.A. Spender für pastöse Produkte, insbesondere für Zahnpasta
EP0463991A1 (de) * 1990-06-21 1992-01-02 Wilhelm A. Keller Austragkartusche mit Vorratszylinder und Förderkolben

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4819836A (en) * 1987-06-10 1989-04-11 Mega Plast Product- U. Verpackungsentwicklung Marketing Gesellschaft Mit Beschrankter Haftung & Co. Dispenser for dispensing paste compositions
DE58903082D1 (de) * 1988-06-03 1993-02-04 Wilhelm A Keller Austragkartusche mit vorratszylinder und foerderkolben.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351517A1 (de) * 1988-06-17 1990-01-24 GUALA S.p.A. Spender für pastöse Produkte, insbesondere für Zahnpasta
EP0463991A1 (de) * 1990-06-21 1992-01-02 Wilhelm A. Keller Austragkartusche mit Vorratszylinder und Förderkolben

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995028337A1 (en) * 1994-04-13 1995-10-26 Adlock Packaging Limited Sealing a flowable product in a dispenser

Also Published As

Publication number Publication date
GB9312052D0 (en) 1993-07-28
GB2278836B (en) 1996-10-23
DE69420315D1 (de) 1999-10-07
DE69420315T2 (de) 2000-05-25
GB2278836A (en) 1994-12-14
EP0628354B1 (de) 1999-09-01
ATE183951T1 (de) 1999-09-15

Similar Documents

Publication Publication Date Title
US4869403A (en) Cartridge for pasty materials
EP1945559B1 (de) Kolben und kolbenanordnung für ein kartuschensystem zum lagern einer substanz und verfahren zum füllen und abdichten einer substanz in einem abgabesystem
JP2587157Y2 (ja) 流動物質用のカートリッジ装置
US20030040701A1 (en) Dual chamber syringe with a dual function piston
US4405249A (en) Dispensing apparatus and method
CA1318295C (en) Dispensing device having improved plunger assemblies
EP0900599B1 (de) Selbstentlüftender Kolben
US5893484A (en) Discharge device for fluid media, particularly for single-stroke only discharge
US20080203112A1 (en) System for Storing and Dispensing of a Substance
CA2279875A1 (en) Applicator for semi-solid medications
CA2543299A1 (en) Dual chamber mixing syringe and method for use
WO2004069303A2 (en) Fluid ejection system
JP2003135487A (ja) 後垂れ防止注入器、並びに、該注入器用プランジャ及びシール体
CA2248696C (en) Industrial syringe
EP0575729B1 (de) Austragsvorrichtung für pastöse Substanzen
EP0628354B1 (de) Dichtungsstopfer
US6080131A (en) Vial for use as syringe accessory
WO1988009679A1 (en) Hypodermic syringe
CN116829099A (zh) 用于从料筒输送材料的分配枪
GB2072755A (en) Dispensing apparatus and method
US3995647A (en) Combined mixer and applicator device
WO1995028337A1 (en) Sealing a flowable product in a dispenser
US20060191802A1 (en) Mixing capsule with forced activation
MXPA98008287A (en) Industrial syringe
JPS62251367A (ja) 流動体押し出し器のピストン押圧装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR IT LI NL SE

17P Request for examination filed

Effective date: 19950210

17Q First examination report despatched

Effective date: 19970430

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990901

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990901

Ref country code: LI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990901

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19990901

Ref country code: CH

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990901

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990901

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19990901

REF Corresponds to:

Ref document number: 183951

Country of ref document: AT

Date of ref document: 19990915

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69420315

Country of ref document: DE

Date of ref document: 19991007

ET Fr: translation filed
NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030630

Year of fee payment: 10

Ref country code: DE

Payment date: 20030630

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050228

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST