Patent US4530186A successfully refreshed from Google Patents.
Patent US5288027A successfully refreshed from Google Patents.
US5288027A
Expired / Lapsed
US
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Dispensing method and apparatus including a ribbon nozzle for coating printed circuit boards
Assignee: Nordson Corp
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Filing: 1992-07-17
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Granted: 1994-02-22
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Expires: 2012-07-17
Abstract
Abstract A dispensing apparatus including an airless ribbon nozzle having a nozzle tip formed with a nozzle bore tapering radially inwardly from an inlet end to a semispherical-shaped discharge end which intersects a rectangular-shaped discharge slot. The nozzle is mounted in position on a coating dispenser such that the inlet of the nozzle tip communicates with a coating passageway within the dispenser to receive coating material which is emitted from the discharge slot of the nozzle tip in a wide, splash-free, leaf-shaped pattern.
Inventors
- 👤 Glen Herstek
- 👤 William E. Donges
- 👤 James J. Turner
- 👤 Ronald Bernt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:42
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/02; B05B1/04; B05B1/042; B05B15/00; B05B15/60; B05B15/65; B05B15/652; H; H05; H05K; H05K3/00; H05K3/0091; H05K2203/00; H05K2203/13; H05K2203/1333; H05K2203/1366; H05K2203/15; H05K2203/1509; H05K3/22; H05K3/28; H05K3/284
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
195 words
A nozzle adapted for use with a coating dispenser for depositing a flat ribbon pattern of coating material onto a printed circuit board, comprising: a nozzle tip formed with a nozzle bore having an inlet end, a discharge end and a longitudinal axis, said nozzle bore tapering inwardly relative to said longitudinal axis from said inlet end toward said discharge end, said discharge end forming a generally semispherical-shaped blind recess within said nozzle tip; the nozzle tip further being formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess of the discharge end of said nozzle bore being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches and; said nozzle tip being formed with a discharge slot which intersects said semispherical-shaped blind recess at the discharge end of said nozzle bore, said discharge slot being substantially rectangular in shape including a length dimension and a width dimension which is substantially constant along the entire length dimension of the slot, said length dimension being in the range of about 0.018 to 0.036 inches, and said width dimension being in the range of about 0.002 to 0.004 inches.
Claim 2
Dependent Claim
195 words
A nozzle adapted for use with a coating dispenser for depositing a flat ribbon pattern of coating material onto a printed circuit board, comprising: a nozzle tip formed with a nozzle bore having an inlet end, a discharge end and a longitudinal axis, said nozzle bore tapering inwardly relative to said longitudinal axis from said inlet end toward said discharge end, said discharge end forming a generally semispherical-shaped blind recess within said nozzle tip; the nozzle tip further being formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess of the discharge end of said nozzle bore being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches and; said nozzle tip being formed with a discharge slot which intersects said semispherical-shaped blind recess at the discharge end of said nozzle bore, said discharge slot being substantially rectangular in shape including a length dimension and a width dimension which is substantially constant along the entire length dimension of the slot, said length dimension being in the range of about 0.018 to 0.036 inches, and said width dimension being in the range of about 0.002 to 0.004 inches.
Claim 3
Dependent Claim
38 words
The nozzle of claim 1 in which said nozzle bore forms an internal wall within said nozzle body, said internal wall being tapered relative to said longitudinal axis of said nozzle bore at an angle of about 10°.
Claim 4
Dependent Claim
199 words
Apparatus for depositing a flat ribbon pattern of coating material onto a printed circuit board comprising: a coating dispenser; a nozzle mounted to said coating dispenser, said nozzle including a nozzle tip formed with a nozzle bore having an inlet end, a discharge end and a longitudinal axis, said nozzle bore tapering inwardly relative to said longitudinal axis from said inlet end toward said discharge end, said discharge end forming a generally semispherical-shaped blind recess within said nozzle tip; the nozzle tip further being formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess of the discharge end of said nozzle bore being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches; said nozzle tip being formed with a discharge slot which intersects said semispherical-shaped blind recess at the discharge end of said nozzle bore, said discharge slot being substantially rectangular in shape including a length dimension and a width dimension which is substantially constant along the entire length dimension of the slot, said length dimension being in the range of about 0.018 to 0.036 inches, and said width dimension being in the range of about 0.002 to 0.004 inches.
Claim 5
Dependent Claim
199 words
Apparatus for depositing a flat ribbon pattern of coating material onto a printed circuit board comprising: a coating dispenser; a nozzle mounted to said coating dispenser, said nozzle including a nozzle tip formed with a nozzle bore having an inlet end, a discharge end and a longitudinal axis, said nozzle bore tapering inwardly relative to said longitudinal axis from said inlet end toward said discharge end, said discharge end forming a generally semispherical-shaped blind recess within said nozzle tip; the nozzle tip further being formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess of the discharge end of said nozzle bore being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches; said nozzle tip being formed with a discharge slot which intersects said semispherical-shaped blind recess at the discharge end of said nozzle bore, said discharge slot being substantially rectangular in shape including a length dimension and a width dimension which is substantially constant along the entire length dimension of the slot, said length dimension being in the range of about 0.018 to 0.036 inches, and said width dimension being in the range of about 0.002 to 0.004 inches.
Claim 6
Dependent Claim
42 words
The apparatus of claim 3 in which said nozzle bore of said nozzle tip forms an internal wall within said nozzle tip, said internal wall being tapered relative to said longitudinal axis of said nozzle bore at an angle of about 10°.
Claim 7
Dependent Claim
81 words
The apparatus of claim 3 wherein the nozzle emits a substantially leaf-shaped pattern of coating material from said discharge slot, the leaf-shaped pattern having a maximum width W at a distance L from said discharge slot, the apparatus further comprising mounting means for movably mounting a flat printed circuit board opposite the nozzle and discharge slot, the mounting means positioning the circuit board approximately a distance L from the discharge slot and generally perpendicular the longitudinal axis of the nozzle bore.
Claim 8
Dependent Claim
42 words
The apparatus of claim 5 further comprising means to move the board relative to the nozzle at a constant distance L to obtain a substantially splash-free, uniform thickness layer of the coating material on the surface of the entire printed circuit board.
Claim 9
Independent Claim
185 words
A method of applying a layer of coating material onto a printed circuit board comprising: supplying insulative coating material into the nozzle bore of a nozzle, the nozzle bore tapering radially inwardly from an inlet to a semispherical-shaped blind recess, the nozzle having a tip formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches; emitting a substantially leaf-shaped pattern of coating material from a rectangular-shaped discharge slot which intersects said blind recess, said discharge slot having a length dimension in the range of about 0.018 to 0.036 inches, and said discharge slot having a width dimension in the range of about 0.002 to 0.004 inches, said leaf-shaped pattern having a maximum width W at a distance L from said discharge slot; positioning the printed circuit board and said nozzle at a distance L from one another and effecting relative movement therebetween at aid distance L to obtain a substantially splash-free, uniform thickness layer of the coating material on the surface of the printed circuit board.
Claim 10
Independent Claim
185 words
A method of applying a layer of coating material onto a printed circuit board comprising: supplying insulative coating material into the nozzle bore of a nozzle, the nozzle bore tapering radially inwardly from an inlet to a semispherical-shaped blind recess, the nozzle having a tip formed with a substantially semispherical-shaped outer end, said semispherical-shaped blind recess being spaced from said semispherical-shaped outer end a distance in the range of approximately 0.004 to 0.024 inches; emitting a substantially leaf-shaped pattern of coating material from a rectangular-shaped discharge slot which intersects said blind recess, said discharge slot having a length dimension in the range of about 0.018 to 0.036 inches, and said discharge slot having a width dimension in the range of about 0.002 to 0.004 inches, said leaf-shaped pattern having a maximum width W at a distance L from said discharge slot; positioning the printed circuit board and said nozzle at a distance L from one another and effecting relative movement therebetween at aid distance L to obtain a substantially splash-free, uniform thickness layer of the coating material on the surface of the printed circuit board.
Claim 11
Dependent Claim
28 words
The method of claim 7 further comprising the step of positioning the printed circuit board and nozzle at a distance L from one another during the entire application.
Claim 12
Dependent Claim
37 words
The method of claim 7 wherein the nozzle bore has a longitudinal axis, the nozzle bore forming an internal wall within the nozzle, which is tapered relative to the longitudinal axis at an angle of approximately 10°.
References Cited (Backward Citations)
US796027A
Cited
US1503001A
Cited
US1753443A
Cited
US1889201A
Cited
CH294200A
Cited
US2755137A
Cited
US3033470A
Cited
US4346849A
Cited
US4334637A
Cited
US4349947A
Cited
US4880663A
Cited
US4982896A
Cited
JPH03238060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |