US4505406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for dispensing liquid compositions
Assignee: Nordson Corp
•
Filing: 1982-02-12
•
Granted: 1985-03-19
•
Expires: 2002-02-12
Abstract
Abstract A method and apparatus for dispensing liquid compositions. The apparatus includes a reservoir for containing the liquid at a low temperature, transfer means to a circulating loop at a higher temperature, means for coincidentally heating and mixing the liquid in the loop and means for dispensing the liquid from the loop. The invention is particularly useful for dispensing liquid adhesive and coating compositions, including thermosetting polymers, heat sensitive polymers or plastisols and other dispersed liquid systems. In addition, mixtures of polymeric liquids with other components such as gases, solvents or liquid blowing agents may be employed with uniformity of composition for dispensing foams or atomizable paints.
Inventors
- 👤 Walter H. Cobbs, Jr.
- 👤 William R. Rehman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:06
CPC Classifications
B; B05; B05B; B05B9/00; B05B9/03; B05B7/00; B05B7/16; B05B7/168; B05B7/24; B05B7/26; B05B7/28; B05B7/32; B29; B29B; B29B7/00; B29B7/74; B29B7/7476
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
144 words
An apparatus for dispensing solvent-coating compositions comprising means for providing a liquid composition comprising a solvent and film-forming solids, means for transferring a portion of said composition to a separate loop maintained under pressure for circulating said portion, means for coincidentally heating and mixing said portion in said loop at a temperature above the normal boiling point of at least a portion of said solvent, said composition being maintained under pressure in its liquid state in said loop, and means for selectively dispensing the composition from the circulating loop to normal atmospheric conditions for evaporation of said solvent portion and for coating a substrate with said film-forming solids wherein said means for providing a liquid composition comprises a container for said solids, a separate supply of solvent and a device to furnish relative amounts of each of said solids and solvent to said loop.
Claim 2
Independent Claim
144 words
An apparatus for dispensing solvent-coating compositions comprising means for providing a liquid composition comprising a solvent and film-forming solids, means for transferring a portion of said composition to a separate loop maintained under pressure for circulating said portion, means for coincidentally heating and mixing said portion in said loop at a temperature above the normal boiling point of at least a portion of said solvent, said composition being maintained under pressure in its liquid state in said loop, and means for selectively dispensing the composition from the circulating loop to normal atmospheric conditions for evaporation of said solvent portion and for coating a substrate with said film-forming solids wherein said means for providing a liquid composition comprises a container for said solids, a separate supply of solvent and a device to furnish relative amounts of each of said solids and solvent to said loop.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 in which the dispensing means comprises an atomization device.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 which comprises a pump for transferring the liquid portion to the loop.
Claim 5
Dependent Claim
17 words
The apparatus of claim 3 further comprising a pump for circulating the liquid portion in said loop.
Claim 6
Dependent Claim
16 words
The apparatus of claim 1 in which said heating and mixing means comprises a static mixer.
Claim 7
Dependent Claim
36 words
The apparatus of claim 4 in which said static mixer comprises a conduit containing a number of fixed right and left-hand helices and the walls of the conduit being in heat transfer relationship with the liquid.
References Cited (Backward Citations)
US2517049A
Cited
US2590442A
Cited
US2763575A
Cited
US2980339A
Cited
US3800985A
Cited
US3820718A
Cited
US4045185A
Cited
US4059466A
Cited
US4059714A
Cited
US4156754A
Cited
US4247581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |