US5285250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste toner collecting device for electrophotographic equipment
Assignee: Ricoh Co Ltd
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Filing: 1993-05-10
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Granted: 1994-02-08
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Expires: 2013-05-10
Abstract
Abstract A waste toner collecting device incorporated in electrophotographic equipment of the type electrostatically forming a latent image on a photoconductive element, developing the latent image by a toner, and transferring the resulted toner image to a recording medium. The device collects a waste toner having been removed from the photoconductive element after the image transfer in a storing section thereof. An auger for conveying the waste toner to the storing section is operatively connected to a drive shaft by a mechanism which is disposed in the storing section and constituted by pin gears each having a number of uniquely configured pins.
Inventors
- 👤 Satoru Yoshioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:32
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/10; G03G21/105
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
260 words
A device incorporated in electrophotographic equipment for collecting a waste toner which is removed from a photoconductive element after a toner image formed on said photoconductive element has been transferred to a recording medium, said device comprising: receptacle means for receiving and storing the waste toner, said receptacle means comprising a first section having an opening for receiving the waste toner and a second section for storing the waste toner; a rotary auger means extending from the first section to the second section of said receptacle means for transporting said waste toner from the first section to the second section of said receptacle means; drive means for driving said rotary auger means, said drive means extending from the electrophotographic equipment and to a position inside said second section of said receptacle means; and a drive transmission mechanism disposed inside the second section of said receptacle means for transmitting a driving force of said drive means to said rotary auger means; said drive transmission mechanism comprising a first pin gear mounted on one end of said rotary auger means and located inside the second section of said receptacle means, and a second pin gear mounted on one end of said drive means inside the second section of said receptacle means and meshing with said first pin gear, such that said first and second pin gears transmit said driving force of said drive means to said rotary auger means and prevent said waste toner stored in the second section of said receptacle means from adhering to said first and second pin gears.
Claim 2
Independent Claim
260 words
A device incorporated in electrophotographic equipment for collecting a waste toner which is removed from a photoconductive element after a toner image formed on said photoconductive element has been transferred to a recording medium, said device comprising: receptacle means for receiving and storing the waste toner, said receptacle means comprising a first section having an opening for receiving the waste toner and a second section for storing the waste toner; a rotary auger means extending from the first section to the second section of said receptacle means for transporting said waste toner from the first section to the second section of said receptacle means; drive means for driving said rotary auger means, said drive means extending from the electrophotographic equipment and to a position inside said second section of said receptacle means; and a drive transmission mechanism disposed inside the second section of said receptacle means for transmitting a driving force of said drive means to said rotary auger means; said drive transmission mechanism comprising a first pin gear mounted on one end of said rotary auger means and located inside the second section of said receptacle means, and a second pin gear mounted on one end of said drive means inside the second section of said receptacle means and meshing with said first pin gear, such that said first and second pin gears transmit said driving force of said drive means to said rotary auger means and prevent said waste toner stored in the second section of said receptacle means from adhering to said first and second pin gears.
Claim 3
Dependent Claim
54 words
A device as claimed in claim 1, wherein said first and second pin gears each comprises a disk-like base having a predetermined thickness, and a number of radially outwardly extending pins being equal in length and studded on a circumferential surface of said base at equally spaced locations along the circumference of said base.
Claim 4
Dependent Claim
24 words
A device as claimed in claim 2, further comprising a third pin gear interposed between and meshing with said first and second pin gears.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |