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Hot melt nozzle with reciprocating piston drip-prevention means

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Publication number
US3315899A
US3315899A US42427165A US3315899A US 3315899 A US3315899 A US 3315899A US 42427165 A US42427165 A US 42427165A US 3315899 A US3315899 A US 3315899A
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Prior art keywords
piston
bore
nozzle
means
hot
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Vernon K Quarve
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VALCO CINCINNATI Inc 411 CIRCLE FREEWAY DRIVE CINCINNATI OH 45246 AN OH CORP
Eastman Kodak Co
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Eastman Kodak Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0225Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet
    • B05C5/0229Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work characterised by flow controlling means, e.g. valves, located proximate the outlet the valve being a gate valve or a sliding valve

Description

United States Patent 3,315,899 HOT MELT NOZZLE WITH RECIPROCATING PISTON DRIP-PREVENTION MEANS Vernon K. Quarve, Brooklyn Center, Minn., assignor, by

mesne assignments, to Eastman Kodak Company, Rochester, N.Y., a corporation of New Jersey Filed Jan. 8, 1965, Ser. No. 424,271 10 Claims. (Cl. 239-586) This invention relates to a method means for metering a viscous liquid, such as the adhesive known as hot melt, with a sharp accurate cut off at the end of the metering period. The present invention is disclosed illustratively as a nozzle for depositing hot melt in which a moving element such as a sliding piston within the nozzle both shuts off the flow of material from a material source through the nozzle and also partially vacates a cavity in the nozzle. This partial vacating of a nozzle cavity creates a low pressure area into which liquid at the nozzle mouth is forced by the surrounding atmosphere to provide the sudden cut off of metered liquid referred to above. This nozzle action is highly desirable in many applications of viscous liquids and will be described particularly in use with a class of viscous adhesives known as hot melts.

It is desirable, when working with adhesives such as hot melts, to deposit a controlled bead of the material on a surface and cut off the bead with a sharp accurate end. Hot melt depositing devices, when moved away from the surface, the flow stopped and the nozzle will generally .trail a string of the adhesive, resulting in a bead protracted beyond the desired limits.

Thus, it is an object of the present invention to provide a means which will deposit a. head of hot melt with a sharp and accurate cut off.

It is a further object of this invention to provide a nozzle which will deposit a head of hot viscous liquid adhesive within sharply defined limits.

It is a still further object of the present invention to provide a nozzle for depositing a bead of viscous liquid adhesive upon a surface wherein a flow of liquid adhesive under pressure is fed through the nozzle while depositing on the surface, and means for selectively cutting off the flow of said liquid while simultaneously reducing the pressure in said nozzle is provided.

It is a yet further object of the invention to provide a method of depositing a bead of hot melt within certain sharply defined limits comprising providing a flow of liquid under pressure to a nozzle, and then at the desired point, stopping the flow of liquid to the nozzle, while simultaneously reducing the pressure within the nozzle.

It is still a further object of this invention to provide means for depositing a head of viscous liquid adhesive on a surface with an accurate, abrupt cut off comprising: a body including an adhesive inlet; a nozzle secured to said body; a piston operating in said body above said nozzle which communicates said inlet with said nozzle when said piston is in its lowermost position and interrupts said communication when said piston is at an intermediate point between the bottom and the top of the stroke thereof; and means for selectively reciprocating said piston.

Other objects of the invention will become apparent as the description proceeds.

To the accomplishment of the foregoing and related ends, this invention then comprises the features hereinafter fully described and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways in which the employed.

principles of the invention may be 'the bore 39 with the annular The invention is illustrated by the accompanying drawings in which the same numerals refer to corresponding parts and in which:

FIGURE 1 is a sectional elevation of the nozzle with the piston in the bottommost position;

FIGURE 2 is a sectional elevation depicting the piston in the uppermost position drawn to the same scale as FIGURE 1.

The body 10 is provided with a bore 11 which is adapted to receive a connection from a source of a liquid plastic adhesive, known as hot melt, under pressure. Such an adaptation is represented by the threads 12. A second bore 13 parallel to the bore 11 is provided in the body 10. The bore 13 has, at its blind extremity, a continuation bore 14. Bore 13 is sealed at its outside opening by any suitable means as for example, by the plug 16 which may be threaded into the threads 17. A third bore 18 is provided in the body 10 intersecting and communicating the bores 11 and 13. Still another bore 19 is provided in the body 10, as shown parallel to the bore 18, in communication with the bore continuation 14. The bore 19 is provided, at

' its upper end as depicted in FIGURE 1, with a counter bore 21. The counter bore 21 is preferably of a substantially larger diameter than that of the bore 19. A blind bore 22 extends downwardly from the face .23 of the counter bore 21. The hole 24 communicates the blind bore 22 with the exterior of the body 10 Means for selectively admitting compressed gas are adapted to be in communication with the hole 24.

Plug 26 is adapted to be threadably inserted into the bore 18 as at 27 to seal this bore from the outside. The plug 26 is provided with a hollow end 28 and a blind bore 29 extending upwardly, longitudinal thereto. Transverse holes 31 are provided in the plug 26. It is desirable to provide at least 2 perpendicular transverse holes 31, communicating the blind bore 29 with the exterior of the plug 26 to provide adequate flow.

end, the hollow plug 28 and, at the lower end, the bottom of the bore 18.

A piston unit 33 is adapted to reciprocate within the bore 19. The piston unit 33 is constructed with a lower portion or first piston 34 adapted to reciprocate within the bore 19 and an upper portion or second piston 36 which is adapted to engage the counter bore 21. A seal is to be provided between the counter bore 21 and the upper piston portion 36. One suitable sealing means is the O-ring 37 which is seated in the annular groove 38 provided in the upper piston portion 36.. A top opening longitudinal blind bore 39 is provided in the piston 33.

The top of the blind bore 39 is to be sealed as for example by means-of the threaded cured into the blind bore 39.

An annular groove 42 is provided in the bore 19 at the position of the bore continuation 14. A second anular groove 43 is provided near the top of the bore 19 to releaseleakage through the hole 49 communicating with the outside. Piston 34 is provided with an annular groove 44 and transverse ports 47 which communicate groove 44 and, thus, with the exterior surface of the piston 34. Transverse ports 48 communicate the longitudinal blind bore 39 with the annular groove 46, provided on the periphery of said plug 41 which is sepiston 34, and, thus, with the exterior surface of the 3 ting compressed gas is suitably represented by the threaded hole 51 in the plug 50.

A nozzle or dispensing member 53 is rigidly secured to the body and includes a chamber 54 of a larger diameter than the bore 19 disposed to be in line with the bore 19. A nozzle outlet 55 communicates the chamber 54 with the exterior of the nozzle 53.

Operation It is to be noted, in FIGURE 1, that the bore 11 is in communication with a source of hot melt under pressure. The hot melt passes through the holes 31 into the bore 29. The bore 18 will, thus, be filled with the hot melt which is then strained through the screen 32 to remove particles therein that will not flow through the nozzle. The hot melt passes, then, through the bore 13 and the bore continuation 14 filling the annular groove 42. When the piston unit 33 is in the bottommost position, the annular groove 44 is in communication with the annular groove 42 and receives therefrom the hot melt under pressure. The hot melt fed to the annular groove 44 passes through the transverse ports 47 and thus into the bore 3-9, and out the ports 48. Hot melt flows from the ports 48 filling the annular groove 46 and that chamber 54, causing hot melt to be extruded through the nozzle outlet 55.

When it is desired to shut off the nozzle, the compressed gas is introduced to the counter bore 21 via bore 22 and hole 24 lifting the piston unit 33 to the position depicted in FIGURE 2. It is noted that the bottom rim 56 engages the bottom of the bore 19 sealing said bore before said piston unit 33 has reached the uppermost position. The hot melt under pressure is thus out of conmmunication with the chamber 54. As the piston unit 33 is further raised there is a decrease of pressure within said chamber. The decrease in pressure within the chamber 54 will tend to pull the hot melt at the nozzle outlet 55 back into the chamber 54 thus resulting in a sharply defined cut off. When the piston unit 33 reaches the position depicted in FIGURE 2, the annular groove 46 is out of communication with the chamber 54, and the annular groove 44 is out of communication with the bore extension 14.

It is apparent that many modifications and variations of this invention as hereinbefore set forth may be made without departing from the spirit and scope thereof. The specific embodiments described are given by way of example only and the invention is limited only by the terms of the appended claims.

I claim:

1. A nozzle for depositing hot melt comprising: a body including an inlet therein for receiving hot melt under pressure and a bore in communication with said inlet; a means for removing impurities from said hot melt interposed between said inlet and said bore; a piston having an exterior surface adapted to slide Within said bore, a 1ongitudinal passage closed at both ends thereof, and two transverse passages, an upper and a lower each communicating said longitudinal passage with the exterior surface of said piston; a dispensing member secured to said body below said bore and including a chamber of a greater diameter than said bore; driving means secured to said piston for selectively reciprocating said piston so that said piston in its bottommost position is disposed with said upper transverse piston passage of said piston in communication with said hot melt inlet and said lower transverse piston passage in communication with said chamber of said dispensing members and said transverse piston passages being out of communication with said inlet and chamber when said piston is at its uppermost position.

2. The nozzle of claim 1 wherein an annular groove is provided in said piston at the position of each transverse piston passage and there is provided a plurality of transverse piston passages at each position of said transverse piston passage.

3. The nozzle of claim 1 wherein the driving means comprises a second piston secured to said piston and said second piston is adapted to slide within a counter bore provided within said body; a source of compressed gas; means for selectively communicating opposite ends of said counter bore with said source of compressed gas so as to allow said compressed gas to selectively impinge on said second piston.

4. A nozzle for depositing hot melt comprising: a body including an inlet for receiving a viscous liquid under pressure, said body having a bore in communication with said inlet, piston means having an exterior surface adapted to slide within said bore, said piston including a longitudinal passage closed at both ends thereof, and a first transverse passage means and a second transverse passage means each communicating said longitudinal passage with the exterior surface of the piston means, a dispensing member secured to said body in alignment with one end of said bore, said dispensing member having a chamber of a greater diameter than said bore, driving means secured to said piston for selectively reciprocating said piston in said bore to a first position and a second position, said piston being in the first position when said first transverse passage is in communication with said inlet and said second transverse passage is in communication with said chamber whereby the viscous liquid under pressure flows through said piston and dispensing member to a discharge location, and said piston being in the second position when the first and second passage means are out of communication with said inlet and said chamber respectively.

5. The nozzle of claim 4 including a means for removing impurities from said viscous liquid interposed be tween said inlet and said bore.

6. The nozzle of claim 4 wherein annular grooves are provided in said piston at the positions of the first and second transverse passages.

7. The nozzle of claim 4 wherein the body has an enlarged counter bore in axial alignment with the bore and said driving means comprises a second piston secured to the piston in the bore, said second piston slidably disposed in said counter bore and secured to said piston, and means for selectively communicating opposite ends of said counter bore with a source of gas under pressure so as to allow said gas to selectively impinge on opposite sides of said second piston.

8. The nozzle of claim 4 wherein said body has an annular groove surrounding said bore in communication with said inlet.

9. The nozzle of claim 8 wherein an annular groove is provided in said piston at the position of the first transverse passage, said annular groove in the piston being in communication with the annular groove in the body when the piston is in the first position.

10. The nozzle of claim 9 wherein an annular groove is provided in said piston at the position at the second transverse passage, said second annular groove being in communication with said chamber when the piston is in the first position.

References Cited by the Examiner UNITED STATES PATENTS 1,136,740 4/1915 Tyson 141-117 2,077,938 4/1937 Kuttner 239-119 X 2,192,884 3/1940 Frank 239-533 2,686,562 8/1954 MacCracken et al. 239-119 2,721,008 10/1955 Morgan 222-571 X 3,118,611 1/1964 Berlyn 239-533 3,174,689 3/1965 McIntyre 239-583 X M. HENSON WOOD, JR, Primary Examiner.

VAN C. WILKS, Assistant Examiner.

Claims (2)

1. A NOZZLE FOR DEPOSITING HOT MELT COMPRISING: A BODY INCLUDING AN INLET THEREIN FOR RECEIVING HOT MELT UNDER PRESSURE AND A BORE IN COMMUNICATION WITH SAID INLET; A MEANS FOR REMOVING IMPURITIES FROM SAID HOT MELT INTERPOSED BETWEEN SAID INLET AND SAID BORE; A PISTON HAVING AN EXTERIOR SURFACE ADAPTED TO SLIDE WITHIN SAID BORE, A LONGITUDINAL PASSAGE CLOSED AT BOTH ENDS THEREOF, AND TWO TRANSVERSE PASSAGES, AN UPPER AND A LOWER EACH COMMUNNICATING SAID LONGITUDINAL PASSAGE WITH THE EXTERIOR SURFACE OF SAID PISTON; A DISPENSING MEMBER SECURED TO SAID BODY BELOW SAID BORE AND INCLUDING A CHAMBER OF A GREATER DIAMETER THAN SAID BORE; DRIVING MEANS SECURED TO SAID PISTON FOR SELECTIVELY RECIPROCATING SAID PISTON SO THAT SAID PISTON IN ITS BOTTOMMOST POSITION IS DISPOSED WITH SAID UPPER TRANSVERSE PISTON PASSAGE OF SAID PISTON IN COMMUNICATION WITH SAID HOT MELT INLET AND SAID LOWER TRANSVERSE PISTON PASSAGE IN COMMUNICATION WITH SAID CHAMBER OF SAID DISPENSING MEMBERS AND SAID TRANSVERSE PISTON PASSAGES BEING OUT OF COMMUNICATION WITH SAID INLET AND CHAMBER WHEN SAID PISTON IS AT ITS UPPERMOST POSITION.
4. A NOZZLE FOR DEPOSITING HOT MELT COMPRISING: A BODY INCLUDING AN INLET FOR RECEIVING A VISCOUS LIQUID UNDER PRESSURE, SAID BODY HAVING A BORE IN COMMUNICATION WITH SAID INLET, PISTON MEANS HAVING AN EXTERIOR SURFACE ADAPTED TO SLIDE WITHIN SAID BORE, SAID PISTON INCLUDING A LONGITUDINAL PASSAGE CLOSED AT BOTH ENDS THEREOF, AND A FIRST TRANSVERSE PASSAGE MEANS AND A SECOND TRANSVERSE PASSAGE MEANS EACH COMMUNICATING SAID LONGITUDINAL PASSAGE WITH THE EXTERIOR SURFACE OF THE PISTON MEANS, A DISPENSING MEMBER SECURED TO SAID BODY IN ALIGNMENT WITH ONE END OF SAID BORE, SAID DISPENSING MEMBER HAVING A CHAMBER OF A GREATER DIAMETER THAN SAID BORE, DRIVING MEANS SECURED TO SAID PISTON FOR SELECTIVELY RECIPROCATING SAID PISTON IN SAID BORE TO A FIRST POSITION AND A SECOND POSITION, SAID PISTON BEING IN THE FIRST POSITION WHEN SAID FIRST TRANSVERSE PASSAGE IS IN COMMUNICATION WITH SAID INLET AND SAID SECOND TRANSVERSE PASSAGE IS IN COMMUNICATION WITH SAID CHAMBER WHEREBY THE VISCOUS LIQUID UNDER PRESSURE FLOWS THROUGH SAID PISTON AND DISPENSING MEMBER TO A DISCHARGE LOCATION, AND SAID PISTON BEING IN THE SECOND POSITION WHEN THE FIRST AND SECOND PASSAGE MEANS ARE OUT OF COMMUNICATION WITH SAID INLET AND SAID CHAMBER RESPECTIVELY.
US3315899A 1965-01-08 1965-01-08 Hot melt nozzle with reciprocating piston drip-prevention means Expired - Lifetime US3315899A (en)

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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348520A (en) * 1965-09-16 1967-10-24 Lockwood Tech Applicator system for hot melt adhesive and the like
US3607340A (en) * 1967-06-13 1971-09-21 Eastman Kodak Co Apparatus and method for spot-coating sheet and web materials
US3661679A (en) * 1970-09-08 1972-05-09 Lockwood Tech Adhesive applicator for plywood patching machine
US3902665A (en) * 1974-06-10 1975-09-02 Ex Cell O Corp Nozzle shut-off valve
US4394945A (en) * 1981-08-06 1983-07-26 Loctite Corporation Valve having suck-back feature
US4637788A (en) * 1982-10-13 1987-01-20 Cadbury Limited Apparatus for making a confection including a depositing means and conveyor carried molds
US4651906A (en) * 1984-11-06 1987-03-24 Bima Maschinenfabrik Gmbh Arrangement for applying adhesive medium, particularly for leather and shoe articles
US4989792A (en) * 1988-02-26 1991-02-05 Nordson Corporation Valve arrangement for intermittent application of a fluid adhesive to a substrate
US5078168A (en) * 1990-07-18 1992-01-07 Nordson Corporation Apparatus for electrostatically isolating conductive coating materials
US5197676A (en) * 1990-07-18 1993-03-30 Nordson Corporation Apparatus for dispensing conductive coating materials
US5205488A (en) * 1990-03-26 1993-04-27 Lonza Ltd. Process and device for spraying a liquid intermittently, especially a lubricant suspension to be sprayed under high pressure
US5221194A (en) * 1990-07-18 1993-06-22 Nordson Corporation Apparatus for electrostatically isolating and pumping conductive coating materials
US5271569A (en) * 1990-07-18 1993-12-21 Nordson Corporation Apparatus for dispensing conductive coating materials
US5326031A (en) * 1992-10-15 1994-07-05 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
US5341990A (en) * 1993-06-11 1994-08-30 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5372283A (en) * 1992-03-17 1994-12-13 Nordson Corporation Two-component dispensing system
US5392989A (en) * 1993-01-13 1995-02-28 Semiconductor Systems, Inc. Nozzle assembly for dispensing liquid
US5402826A (en) * 1994-03-07 1995-04-04 Nordson Corporation Coupling device
US5447254A (en) * 1993-11-16 1995-09-05 Nordson Corporation Fluid dispenser with shut-off drip protection
US5549755A (en) * 1994-12-08 1996-08-27 Nordson Corporation Apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5655896A (en) * 1994-01-25 1997-08-12 Nordson Corporation Apparatus for dispensing conductive coating materials having multiple flow paths
US5733597A (en) * 1992-07-08 1998-03-31 Nordson Corporation Snuff back controlled coating dispensing apparatus and methods
US5947392A (en) * 1997-09-12 1999-09-07 Noroson Corporation Two-component metering and mixing system for electrically conductive coating material
US6348171B1 (en) * 1999-05-11 2002-02-19 Mold Masters Limited Drool control apparatus and method
US20040191357A1 (en) * 2003-03-31 2004-09-30 Mold-Masters Limited Sprue bushing anti-drool device
US20050035496A1 (en) * 2003-08-11 2005-02-17 Neil Dewar Decompression device for an injection molding apparatus
US20050280186A1 (en) * 2004-06-18 2005-12-22 Mold-Masters Limited Melt transfer device for a stack molding apparatus
US20070029036A1 (en) * 2005-07-01 2007-02-08 Nordson Corporation Apparatus and process to apply adhesive during labeling operations

Citations (7)

* Cited by examiner, † Cited by third party
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US1136740A (en) * 1913-04-17 1915-04-20 Frank Tyson Valve for bottle-filling machines.
US2077938A (en) * 1935-07-05 1937-04-20 Int Harvester Co Injection valve for engines
US2192884A (en) * 1937-07-03 1940-03-12 Horace J Frank Automatic fuel injection valve
US2686562A (en) * 1950-01-20 1954-08-17 Jet Heet Inc Liquid fuel burner system with spray nozzle evacuator
US2721008A (en) * 1953-02-02 1955-10-18 Bartelt Engineering Co Dispensing device
US3118611A (en) * 1963-02-04 1964-01-21 Martin J Berlyn Fuel injection nozzle
US3174689A (en) * 1962-12-06 1965-03-23 Donald B Mcintyre Fluid-distribution mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1136740A (en) * 1913-04-17 1915-04-20 Frank Tyson Valve for bottle-filling machines.
US2077938A (en) * 1935-07-05 1937-04-20 Int Harvester Co Injection valve for engines
US2192884A (en) * 1937-07-03 1940-03-12 Horace J Frank Automatic fuel injection valve
US2686562A (en) * 1950-01-20 1954-08-17 Jet Heet Inc Liquid fuel burner system with spray nozzle evacuator
US2721008A (en) * 1953-02-02 1955-10-18 Bartelt Engineering Co Dispensing device
US3174689A (en) * 1962-12-06 1965-03-23 Donald B Mcintyre Fluid-distribution mechanism
US3118611A (en) * 1963-02-04 1964-01-21 Martin J Berlyn Fuel injection nozzle

Cited By (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348520A (en) * 1965-09-16 1967-10-24 Lockwood Tech Applicator system for hot melt adhesive and the like
US3607340A (en) * 1967-06-13 1971-09-21 Eastman Kodak Co Apparatus and method for spot-coating sheet and web materials
US3661679A (en) * 1970-09-08 1972-05-09 Lockwood Tech Adhesive applicator for plywood patching machine
US3902665A (en) * 1974-06-10 1975-09-02 Ex Cell O Corp Nozzle shut-off valve
US4394945A (en) * 1981-08-06 1983-07-26 Loctite Corporation Valve having suck-back feature
US4637788A (en) * 1982-10-13 1987-01-20 Cadbury Limited Apparatus for making a confection including a depositing means and conveyor carried molds
US4651906A (en) * 1984-11-06 1987-03-24 Bima Maschinenfabrik Gmbh Arrangement for applying adhesive medium, particularly for leather and shoe articles
US4989792A (en) * 1988-02-26 1991-02-05 Nordson Corporation Valve arrangement for intermittent application of a fluid adhesive to a substrate
US5205488A (en) * 1990-03-26 1993-04-27 Lonza Ltd. Process and device for spraying a liquid intermittently, especially a lubricant suspension to be sprayed under high pressure
US5340289A (en) * 1990-07-18 1994-08-23 Nordson Corporation Apparatus for electrostatically isolating and pumping conductive coating materials
US5197676A (en) * 1990-07-18 1993-03-30 Nordson Corporation Apparatus for dispensing conductive coating materials
US5221194A (en) * 1990-07-18 1993-06-22 Nordson Corporation Apparatus for electrostatically isolating and pumping conductive coating materials
US5271569A (en) * 1990-07-18 1993-12-21 Nordson Corporation Apparatus for dispensing conductive coating materials
US5078168A (en) * 1990-07-18 1992-01-07 Nordson Corporation Apparatus for electrostatically isolating conductive coating materials
US5372283A (en) * 1992-03-17 1994-12-13 Nordson Corporation Two-component dispensing system
US5733597A (en) * 1992-07-08 1998-03-31 Nordson Corporation Snuff back controlled coating dispensing apparatus and methods
USRE35883E (en) * 1992-10-15 1998-09-01 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
US5326031A (en) * 1992-10-15 1994-07-05 Nordson Corporation Apparatus for dispensing conductive coating materials including color changing capability
US5392989A (en) * 1993-01-13 1995-02-28 Semiconductor Systems, Inc. Nozzle assembly for dispensing liquid
US5341990A (en) * 1993-06-11 1994-08-30 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5538186A (en) * 1993-06-11 1996-07-23 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5707013A (en) * 1993-06-11 1998-01-13 Nordson Corporation Apparatus and method for dispensing electrically conductive coating material including a pneumatic/mechanical control
US5447254A (en) * 1993-11-16 1995-09-05 Nordson Corporation Fluid dispenser with shut-off drip protection
US5655896A (en) * 1994-01-25 1997-08-12 Nordson Corporation Apparatus for dispensing conductive coating materials having multiple flow paths
US5402826A (en) * 1994-03-07 1995-04-04 Nordson Corporation Coupling device
US5549755A (en) * 1994-12-08 1996-08-27 Nordson Corporation Apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5759277A (en) * 1994-12-08 1998-06-02 Nordson Corporation Manual and automatic apparatus for supplying conductive coating materials including transfer units having a combined shuttle and pumping device
US5947392A (en) * 1997-09-12 1999-09-07 Noroson Corporation Two-component metering and mixing system for electrically conductive coating material
US6348171B1 (en) * 1999-05-11 2002-02-19 Mold Masters Limited Drool control apparatus and method
US7416402B2 (en) 2003-03-31 2008-08-26 Mold-Masters (2007) Limited Sprue bushing anti-drool device
US20040191357A1 (en) * 2003-03-31 2004-09-30 Mold-Masters Limited Sprue bushing anti-drool device
US20050035496A1 (en) * 2003-08-11 2005-02-17 Neil Dewar Decompression device for an injection molding apparatus
US7125242B2 (en) 2003-08-11 2006-10-24 Mold-Masters Limited Decompression device for an injection molding apparatus
US20050280186A1 (en) * 2004-06-18 2005-12-22 Mold-Masters Limited Melt transfer device for a stack molding apparatus
US7303720B2 (en) 2004-06-18 2007-12-04 Mold-Masters Limited Melt transfer device for a stack molding apparatus
US20080014344A1 (en) * 2005-07-01 2008-01-17 Nordson Corporation Apparatus and related methods to apply adhesive during labeling operations
US20070029036A1 (en) * 2005-07-01 2007-02-08 Nordson Corporation Apparatus and process to apply adhesive during labeling operations
US7771556B2 (en) * 2005-07-01 2010-08-10 Nordson Corporation Apparatus and process to apply adhesive during labeling operations
US20100300599A1 (en) * 2005-07-01 2010-12-02 Nordson Corporation Apparatus And Process To Apply Adhesive During Labeling Operations

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Owner name: VALCO CINCINNATI, INC., 411 CIRCLE FREEWAY DRIVE,

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Effective date: 19831118