US4100611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling airborne particle emission
Assignee: Xerox Corp
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Filing: 1976-05-11
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Granted: 1978-07-11
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Expires: 1996-05-11
Abstract
Abstract A system for minimizing free airborne particles generated by movement of a two component powder material within a partially open container. The two component material includes a relatively large component and a relatively small component as is used in carrier and toner for developing electrostatographic images. A filter with predetermined pore size is positioned across the flow of the two component material and connected to a source of negative pressure.
Inventors
- 👤 Don B. Jugle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0896; G03G15/0898
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
An improved filtering apparatus for suppressing airborne particle emission from a partially open container comprising a partially open container for containing a two component powder including a relatively large component and a relatively small component, means for agitating said two component powder to cause at least a portion of said small component to become airborne particles, means for generating an air flow into said container through the agitated powder to recombine said airborne particles therewith and filter means positioned to receive the air flow and any uncombined airborne particles, said filter means having openings smaller than said uncombined particles and being positioned so as to be continuously cleaned by the flow of the two compound powder thereacross.
Claim 2
Dependent Claim
117 words
An improved filtering apparatus for suppressing airborne particle emission from a partially open container comprising a partially open container for containing a two component powder including a relatively large component and a relatively small component, means for agitating said two component powder to cause at least a portion of said small component to become airborne particles, means for generating an air flow into said container through the agitated powder to recombine said airborne particles therewith and filter means positioned to receive the air flow and any uncombined airborne particles, said filter means having openings smaller than said uncombined particles and being positioned so as to be continuously cleaned by the flow of the two compound powder thereacross.
Claim 3
Dependent Claim
27 words
Apparatus according to claim 1 wherein the relatively large component is at least 50μ in size and the relatively small compinent is less than 40μ in size.
Claim 4
Dependent Claim
15 words
Apparatus according to claim 1 wherein said large and small components have an electrostatic attraction.
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) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |