US4935261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling accurate dispensing of adhesive droplets
Assignee: MICRO ROBOTICS SYSTEMS Inc 25 INDUSTRIAL BLVD CHELMSFORD MA 01824
•
Filing: 1988-10-17
•
Granted: 1990-06-19
•
Expires: 2008-10-17
Abstract
Abstract A method of optically controlling the volume of adhesive extruded from an orifice. A camera continuously monitors the adhesive discharged from the orifice; this adhesive is not applied to the target area until its volume is within preestablished limits. When the volume of adhesive is visually determined to be acceptable it is then applied to the target area. The camera is used again, to confirm the proper amount of adhesive has been applied to the target area by measuring the volume of adhesive remaining on the orifice after contacting the target area.
Inventors
- 👤 Nilendu Srivastava
- 👤 Fei-Jain Wu
- 👤 Michael J. Chalsen
- 👤 Leslie Scenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:31
CPC Classifications
B; B05; B05C; B05C11/00; B05C11/10; B05C11/1002; B05C11/1034
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
A method for controlling the amounts of adhesive deposited on micro components which includes: extruding an adhesive through an orifice; measuring visually the volume of adhesive extruded from the orifice; stopping the flow of adhesive through the orifice when a predetermined volume of adhesive has been extruded; transferring the adhesive to a target site; measuring visually the volume of adhesive transferred; and confirming the volume transferred was within preestablished limits.
Claim 2
Independent Claim
70 words
A method for controlling the amounts of adhesive deposited on micro components which includes: extruding an adhesive through an orifice; measuring visually the volume of adhesive extruded from the orifice; stopping the flow of adhesive through the orifice when a predetermined volume of adhesive has been extruded; transferring the adhesive to a target site; measuring visually the volume of adhesive transferred; and confirming the volume transferred was within preestablished limits.
Claim 3
Dependent Claim
53 words
The method of claim 1 wherein the confirming of volume transferred was within preestablished limits includes: measuring visually the volume of adhesive remaining on the orifice after the transfer has been made; and comparing said remaining volume to the amount of adhesive extruded from the orifice prior to transfer to the target site.
Claim 4
Independent Claim
14 words
The method of claims 1 or 2 wherein the adhesive is an epoxy adhesive.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the target sight comprises a read-wright slide.
Claim 6
Independent Claim
19 words
The method of claims 1 or 2 which includes: a camera system for measuring visibly the volume of adhesive.
Claim 7
Independent Claim
15 words
The method of claims 1 or 2 wherein the adhesive is extruded by pneumatic pressure.
Claim 8
Independent Claim
26 words
The method of claims 1 or 2 wherein the adhesive is extruded and transferred along a vertical axis and which includes: measuring along a horizontal axis.
References Cited (Backward Citations)
DE197801C
Cited
US3476291A
Cited
US3825153A
Cited
US4041995A
Cited
US4030640A
Cited
US4218989A
Cited
US4458827A
Cited
US4513796A
Cited
US4661368A
Cited
US4683143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |