US3876144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent cleaning of spray nozzles
Assignee: Comalco Products Pty Ltd
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Filing: 1973-09-19
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Granted: 1975-04-08
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Expires: 1993-09-19
Abstract
Abstract Apparatus for preventing build-up of sealing compound at the outlet of an intermittently operated sealing compound ejecting nozzle. In the device, a stream of air is directed towards the outlet of the nozzle from a suitable air outlet, and a solvent is injected into the air stream at a point upstream from the air outlet, the air outlet being located at a distance from the nozzle such that turbulence of the air stream occurs in the area of the nozzle. The rate of supply of solvent to the air stream is such as to produce an atmosphere saturated with solvent in the turbulent area. This prevents evaporation of solvent from the sealing compound and hence prevents the sealing compound building up at the outlet of the nozzle.
Inventors
- 👤 Raymond Francis Madden
- 👤 Dennis Barry Moreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:03
CPC Classifications
B; B21; B21D; B21D51/00; B21D51/16; B21D51/38; B21D51/44; B21D51/46; B05; B05B; B05B15/00; B05B15/50; B05B15/55; B05B15/555
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
161 words
Apparatus for preventing build-up of sealing compound at the outlet of an intermittently operated sealing compound ejecting nozzle comprising: means to direct a stream of air towards the outlet of said nozzle, said means being in the form of a jet pipe having a small-diameter outlet and a bend of relatively large radius located at a distance from said outlet; and means to inject a solvent into said airstream at a point upstream from said air outlet, said means including a hypodermic needle which enters said jet pipe on the outside of said bend and is aligned substantially coaxially with said jet pipe between said bend and the outlet of said jet pipe, said air outlet being located at a distance from said nozzle such that turbulence of the airstream occurs in the area of said nozzle, and the rate of supply of solvent to said airstream being such as to produce an atmosphere saturated with solvent in said turbulent area.
Claim 2
Dependent Claim
161 words
Apparatus for preventing build-up of sealing compound at the outlet of an intermittently operated sealing compound ejecting nozzle comprising: means to direct a stream of air towards the outlet of said nozzle, said means being in the form of a jet pipe having a small-diameter outlet and a bend of relatively large radius located at a distance from said outlet; and means to inject a solvent into said airstream at a point upstream from said air outlet, said means including a hypodermic needle which enters said jet pipe on the outside of said bend and is aligned substantially coaxially with said jet pipe between said bend and the outlet of said jet pipe, said air outlet being located at a distance from said nozzle such that turbulence of the airstream occurs in the area of said nozzle, and the rate of supply of solvent to said airstream being such as to produce an atmosphere saturated with solvent in said turbulent area.
Claim 3
Dependent Claim
85 words
Apparatus for preventing build-up of sealing compound at the outlet of an intermittently operated sealing compound ejecting nozzle as claimed in claim 1 including a container for said solvent from which solvent is dispensed under air pressure applied to the surface of said solvent in said container, means being provided to control the pressure of the air in said jet pipe and at the surface of the solvent in the container so that the former pressure is at least slightly less than the latter pressure.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |