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US 5,368,199 AGranted
Microwaveable hot melt dispenser
AssigneesLoctite Corporation, Nottingham-Spirk Design Associates, Inc.
InventorsHans E. Haas, Bernard M. Malofsky, Richard T. Thompson, Cynthia R. Jaros, John R. Nottingham, John Spirk, Craig M. Saunders, Paul E. Brokaw
Life of this patent
Estimating the term…
Abstract
The present invention relates to improvements in the design and construction of apparatus for dispensing microwaveable hot melt adhesives and other heat sensitive materials. The apparatus comprises a dispenser which is heated by microwaves and then used to dispense a material therefrom. The dispenser is specifically designed to convert microwave energy into heat and to transfer the heat to the material to be dispensed in a more efficient and/or safe manner.
Claims48
Apparatus for dispensing heat sensitive materials comprising:
- i) a first material which upon heating to a predetermined temperature is either transformed from a solid state or state of high viscosity to a liquid state or state of low viscosity or activated such that polymerisation or cure of the first material is initiated,
- ii) a second material which is designed to heat to at least the predetermined temperature when subjected to microwave energy for at least a predetermined period of time, said second material also being in a heat transfer relationship with, but not dispersed within, said first material,
- iii) a container within which the first material is disposed and which may either comprise or contain the second material, and
- iv) an outlet through which said first material is to be dispensed following exposure of the apparatus to microwaves;
- wherein the second material comprises a ferromagnetic material having a minimum Curie temperature at least equal to the predetermined temperature and a maximum Curie temperature which is lower than the temperature at which the first material will boil or be adversely affected by the heat generated by the second material and lower than the ignition temperature of either the first material or the container.
2 more elements
Apparatus for dispensing heat sensitive materials comprising:
- i) a first material which upon heating to a predetermined temperature is either transformed from a solid state or state of high viscosity to a liquid state or state of low viscosity or activated such that polymerisation or cure of the first material is initiated,
- ii) a second material which is designed to heat to at least the predetermined temperature when subjected to microwave energy for at least a predetermined period of time, said second material also being in a heat transfer relationship with, but not dispersed within, said first material,
- iii) a container having a longitudinal axis and within which the first material is disposed, said container either comprising the second material or within which the second material is also disposed, and having at least one rib on its interior surface parallel to and extending inwardly towards the longitudinal axis.
Apparatus for dispensing heat sensitive materials comprising:
- i) a first material which upon heating to a predetermined temperature is either transformed from a solid state or state of high viscosity to a liquid state or state of low viscosity or activated such that polymerisation or cure of the first material is initiated,
- ii) a second material which is designed to heat to at least the predetermined temperature when subjected to microwave energy for at least a predetermined period of time, said second material also being in a heat transfer relationship with, but not dispersed within, said first material,
- iii) a container having a longitudinal axis and within which the first material is disposed and which may either comprise or contain the second material, and
- iv) an outlet through which said first material is to be dispensed following exposure of the apparatus to microwaves;
- wherein the second material is present in the form of a heating rod, said heating rod having a longitudinal axis parallel to the axis of the container and being encased or embedded within the first material.
2 more elements
Apparatus for dispensing heat sensitive materials comprising:
- i) a first material which upon heating to a predetermined temperature is either transformed from a solid state or state of high viscosity to a liquid state or state of low viscosity or activated such that polymerisation or cure of the first material is initiated,
- ii) a second material which is designed to heat to at least the predetermined temperature when subjected to microwave energy for at least a predetermined period of time, said second material also being in a heat transfer relationship with, but not dispersed within, said first material,
- iii) a container having a longitudinal axis and within which the first material i s disposed and which may either comprise or contain the second material,
- iv) an outlet through which said first material is to be dispensed following exposure of the apparatus to micro waves, and
- v) a microwave transparent, insulative jacket substantially encasing the container.
2 more elements
Apparatus for dispensing heat sensitive materials comprising:
- i) a first material which upon heating to a predetermined temperature is either transformed from a solid state or a state of high viscosity to a liquid state or state of low viscosity or activated such that polymerization or cure of the first material is initiated,
- ii) a second material which is designed to heat to at least the predetermined temperature when subjected to microwave energy for at least a predetermined period of time, said second material also being in a heat transfer relationship with, but not dispersed within, said first material,
- iii) a container within which the first material is disposed and which may either comprise or contain the second material,
- iv) an outlet through which said first material is to be dispensed following exposure of the apparatus to microwaves;
- and
- v) a microwave transparent, insulative jacket substantially encasing the container;
- wherein the second material comprises a ferromagnetic material having a minimum Curie temperature at least equal to the predetermined temperature and a maximum Curie temperature which is lower than the temperature at which the first material will boil or be adversely affected by the heat generated by the second material and lower than the ignition temperature of either the first material or the container.
4 more elements
Dependencies are inferred from the claim text.