Patent US5331378A successfully refreshed from Google Patents.
US5331378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner cartridge with independent driven systems
Assignee: Lexmark International Inc
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Filing: 1993-07-29
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Granted: 1994-07-19
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Expires: 2013-07-29
Abstract
Abstract In a toner cartridge, photoconductor drum (11) is driven by a gear (3) which is in the printer, toner adder roller (48) is driven independently by a face coupling (5) which is in the printer. On the opposite side, a gear train from toner adder roller (48) drives developer roller (42) and toner paddle (52). The two systems permit the cartridge to function in different printers requiring different ratios of speeds. Stiffness requirements of the cartridge are reduced. Movements are more consistent, and space utilization is enhanced.
Inventors
- 👤 Ronald W. Baker
- 👤 Robert L. Burdick
- 👤 Martin V. DiGirolamo
- 👤 David L. Merrifield
- 👤 James J. Molloy
- 👤 Paul D. Horrall
- 👤 Gary M. Tylicki
- 👤 II Earl D. Ward
- 👤 Bernard L. Wilzbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:55
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/16; G03G21/18; G03G21/1803; G03G21/181; G03G21/1642; G03G21/1647; G03G21/1839; G03G21/1857; G03G2221/00; G03G2221/16; G03G2221/1651; G03G2221/1657
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
174 words
An electrophotographic toner cartridge containing an endless, rotatable photoconductive member, a development system having at least a rotatable developer roller, a toner chamber, a rotatable toner paddle in said toner chamber, and a rotatable member intermediate said developer roller and said toner paddle, said cartridge having a first coupling for rotating said photoconductive member by coupling with a driving source from a printer and a second coupling, independent of said first coupling, for rotating said developer roller by coupling with a driving source from said printer, said first and said second couplings being on one side of said cartridge, said second coupling being an integral extension of said intermediate member, a first linkage from said intermediate member to said developer roller to rotate said developer roller by rotation of said second coupling, and a second linkage from said intermediate member to said toner paddle to rotate said toner paddle by rotation of said second coupling, said first linkage and said second linkage being entirely on the side of said cartridge opposite said one side.
Claim 2
Dependent Claim
174 words
An electrophotographic toner cartridge containing an endless, rotatable photoconductive member, a development system having at least a rotatable developer roller, a toner chamber, a rotatable toner paddle in said toner chamber, and a rotatable member intermediate said developer roller and said toner paddle, said cartridge having a first coupling for rotating said photoconductive member by coupling with a driving source from a printer and a second coupling, independent of said first coupling, for rotating said developer roller by coupling with a driving source from said printer, said first and said second couplings being on one side of said cartridge, said second coupling being an integral extension of said intermediate member, a first linkage from said intermediate member to said developer roller to rotate said developer roller by rotation of said second coupling, and a second linkage from said intermediate member to said toner paddle to rotate said toner paddle by rotation of said second coupling, said first linkage and said second linkage being entirely on the side of said cartridge opposite said one side.
Claim 3
Dependent Claim
16 words
The toner cartridge of claim 1 in which said second linkage is a speed reduction system.
Claim 4
Dependent Claim
16 words
The toner cartridge of claim 1 in which said intermediate member is a toner adder roller.
Claim 5
Dependent Claim
16 words
The toner cartridge of claim 2 in which said intermediate member is a toner adder roller.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |