Patent US4516849A successfully refreshed from Google Patents.
US4516849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning device for an electrostatic photographic copying machine
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1983-03-17
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Granted: 1985-05-14
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Expires: 2003-03-17
Abstract
Abstract A cleaning device for an electrostatic photographic copying machine having a sensitive drum provided with a paper-stripping groove at one side thereof includes an upper blade for stripping residual toner from the sensitive drum, a lower blade for guiding the thus stripped toner from the surface of the sensitive drum toward a toner withdrawing device, and a groove cover covering the paper-stripping groove at least from the upper blade to the lower blade so that the groove cover will be in contact with the lower blade. Residual toner which is stripped from the surface of the sensitive drum is prevented from entering the paper stripping groove by the groove cover.
Inventors
- 👤 Eiji Tsutsui
- 👤 Masahiro Yoshioka
- 👤 Masahiro Murakami
- 👤 Noriyuki Iwao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:05
CPC Classifications
G; G03; G03G; G03G21/00; G03G21/0005; G03G21/0011; G03G21/0029
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
152 words
A cleaning device for use in an electrostatic photographic copying machine of the type including a sensitive drum rotatable about an axis and provided at one axial end with an annular paper-stripping groove, for removing residual toner from the surface of the drum, said cleaning device comprising: an upper blade mounted to contact the drum to strip therefrom residual toner; a lower blade mounted below said upper blade and upstream thereof in the rotary direction of the drum for guiding the stripped residual toner to a toner withdrawal device; and means for preventing the stripped toner from entering the paper-stripping groove, said means comprising a groove cover mounted to extend into and cover the paper-stripping groove at least from the position of contact of said upper blade with the drum to the position of contact of said lower blade with the drum, said groove cover being in contact with said lower blade.
Claim 2
Dependent Claim
152 words
A cleaning device for use in an electrostatic photographic copying machine of the type including a sensitive drum rotatable about an axis and provided at one axial end with an annular paper-stripping groove, for removing residual toner from the surface of the drum, said cleaning device comprising: an upper blade mounted to contact the drum to strip therefrom residual toner; a lower blade mounted below said upper blade and upstream thereof in the rotary direction of the drum for guiding the stripped residual toner to a toner withdrawal device; and means for preventing the stripped toner from entering the paper-stripping groove, said means comprising a groove cover mounted to extend into and cover the paper-stripping groove at least from the position of contact of said upper blade with the drum to the position of contact of said lower blade with the drum, said groove cover being in contact with said lower blade.
Claim 3
Dependent Claim
35 words
A device as claimed in claim 1, further comprising means for mounting said groove cover for sliding adjustment in opposite directions parallel to a horizontal line extending transverse to the rotational axis of the drum.
Claim 4
Dependent Claim
25 words
A device as claimed in claim 1, further comprising means for mounting said groove cover for sliding adjustment in opposite directions radially of the drum.
Claim 5
Dependent Claim
120 words
A device as claimed in claim 1, further comprising means for mounting said groove cover for relative movement in directions toward and away from the paper-stripping groove, said mounting means comprising a member extending laterally of said groove cover, said member having a first end integral with said groove cover and a second end having extending therefrom a first pin having an axis parallel to the axis of the drum, a fixed side plate having therein an elongated hole, said first pin fitting into said hole for selective movement along the length thereof, and means for fixing said member to said fixed side plate with said first pin positioned at a selected position along the length of said elongated hole.
Claim 6
Dependent Claim
85 words
A device as claimed in claim 4, wherein said fixing means comprises a plate fixed adjustably to said fixed side plate and having therethrough a pivot hole, said second end of said member having extending therefrom a second pin opposite to said first pin and coaxial therewith, said second pin fitting into said pivot hole, said second end of said member being positioned between said plate and said fixed side plate and pivotable with respect thereto about colinear axes of said first and second pins.
Claim 7
Dependent Claim
35 words
A device as claimed in claim 5, further comprising a stopper extending from said plate for abutment with said second end of said member to limit pivoting movement of said member relative to said plate.
Claim 8
Dependent Claim
45 words
A device as claimed in claim 5, wherein said fixed side plate has therethrough a T-shaped opening, said plate includes a portion extending through said opening, and further comprising a bolt extending through said opening and adjustably fixing said plate to said fixed side plate.
Claim 9
Dependent Claim
154 words
In an electrostatic photographic copying machine of the type including a sensitive drum rotatable about an axis and provided at one axial end with an annular paper-stripping groove, and a cleaning device for removing residual toner from the surface of said drum, the improvement wherein said cleaning device comprises: an upper blade mounted to contact said drum to strip therefrom residual toner; a lower blade mounted below said upper blade and upstream thereof in the rotary direction of said drum for guiding the stripped residual toner to a toner withdrawal device; and means for preventing the stripped toner from entering said paper-stripping groove, said means comprising a groove cover mounted to extend into and cover said paper-stripping groove at least from the position of contact of said upper blade with said drum to the position of contact of said lower blade with said drum, said groove cover being in contact with said lower blade.
Claim 10
Dependent Claim
154 words
In an electrostatic photographic copying machine of the type including a sensitive drum rotatable about an axis and provided at one axial end with an annular paper-stripping groove, and a cleaning device for removing residual toner from the surface of said drum, the improvement wherein said cleaning device comprises: an upper blade mounted to contact said drum to strip therefrom residual toner; a lower blade mounted below said upper blade and upstream thereof in the rotary direction of said drum for guiding the stripped residual toner to a toner withdrawal device; and means for preventing the stripped toner from entering said paper-stripping groove, said means comprising a groove cover mounted to extend into and cover said paper-stripping groove at least from the position of contact of said upper blade with said drum to the position of contact of said lower blade with said drum, said groove cover being in contact with said lower blade.
Claim 11
Dependent Claim
34 words
The improvement claimed in claim 8, further comprising means for mounting said groove cover for sliding adjustment in opposite directions parallel to a horizontal line extending transverse to the rotational axis of said drum.
Claim 12
Dependent Claim
24 words
The improvement claimed in claim 8, further comprising means for mounting said groove cover for sliding adjustment in opposite directions radially of said drum.
Claim 13
Dependent Claim
119 words
The improvement claimed in claim 8, further comprising means for mounting said groove cover for relative movement in directions toward and away from said paper-stripping groove, said mounting means comprising a member extending laterally of said groove cover, said member having a first end integral with said groove cover and a second end having extending therefrom a first pin having an axis parallel to said axis of said drum, a fixed side plate having therein an elongated hole, said first pin fitting into said hole for selective movement along the length thereof, and means for fixing said member to said fixed side plate with said first pin positioned at a selected position along the length of said elongated hole.
Claim 14
Dependent Claim
84 words
The improvement claimed in claim 11, wherein said fixing means comprises a plate fixed adjustably to said fixed side plate and having therethrough a pivot hole, said second end of said member having extending therefrom a second pin opposite to said first pin and coaxial therewith, said second pin fitting into said pivot hole, said second end of said member being positioned between said plate and said fixed side plate and pivotable with respect thereto about colinear axes of said first and second pins.
Claim 15
Dependent Claim
34 words
The improvement claimed in claim 13, further comprising a stopper extending from said plate for abutment with said second end of said member to limit pivoting movement of said member relative to said plate.
Claim 16
Dependent Claim
44 words
The improvement claimed in claim 13, wherein said fixed side plate has therethrough a T-shaped opening, said plate includes a portion extending through said opening, and further comprising a bolt extending through said opening and adjustably fixing said plate to said fixed side plate.
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) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |