US4682881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing an electrophotographic print
Assignee: Ishihara Sangyo Kaisha Ltd
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Filing: 1985-11-01
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Granted: 1987-07-28
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Expires: 2005-11-01
Abstract
Abstract An apparatus for producing an electrophotographic print on a photosensitive receptor which is movable through a plurality of predetermined stations so as to produce an electrostatic latent image on the photosensitive receptor, the apparatus including a rotary drum having a peripheral surface which defines an image forming section and a non-image forming section, the photosensitive sheet being placeable on the image forming section of the drum surface, a developing unit having at least one developing section for supplying a developer to the photosensitive sheet on the drum, thereby making the electrostatic latent image visible, and a device for collecting the used developer from the photosensitive sheet, the collecting device being provided axially of the drum in the non-image forming section of the peripheral surface.
Inventors
- 👤 Shoji Komatsubara
- 👤 Yukio Hatabe
- 👤 Tooru Horikawa
- 👤 Sadao Murasawa
- 👤 Hajime Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10; G03G15/11; G03G21/00; G03G21/0088
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
164 words
An apparatus for producing an electrophotographic print on a photosensitive receptor movable through a plurality of predetermined stations so as to produce an electrostatic latent image on the photosensitive receptor, the apparatus comprising: a rotary drum having a peripheral surface defining an image forming section and a non-image forming section, the photosensitive receptor being placeable on the image forming section of the drum surface; a developing unit having at least one developing station for supplying a developer to the photosensitive receptor on the drum so as to make the electrostatic latent image visible; means for collecting the used developer from the photosensitive receptor, the collecting means being provided axially of the drum in the non-image forming section of the peripheral surface and including a suction opening on the drum surface connected to a sucking means provided externally of the drum, the suction opening being formed as a groove extending crosswise of the drum surface; and a developer absorbent material provided in the suction opening.
Claim 2
Independent Claim
164 words
An apparatus for producing an electrophotographic print on a photosensitive receptor movable through a plurality of predetermined stations so as to produce an electrostatic latent image on the photosensitive receptor, the apparatus comprising: a rotary drum having a peripheral surface defining an image forming section and a non-image forming section, the photosensitive receptor being placeable on the image forming section of the drum surface; a developing unit having at least one developing station for supplying a developer to the photosensitive receptor on the drum so as to make the electrostatic latent image visible; means for collecting the used developer from the photosensitive receptor, the collecting means being provided axially of the drum in the non-image forming section of the peripheral surface and including a suction opening on the drum surface connected to a sucking means provided externally of the drum, the suction opening being formed as a groove extending crosswise of the drum surface; and a developer absorbent material provided in the suction opening.
Claim 3
Dependent Claim
16 words
An apparatus as defined in claim 1, wherein the absorbent material is packed in the groove.
Claim 4
Dependent Claim
14 words
An apparatus as defined in claim 1, wherein the groove diverges toward its bottom.
Claim 5
Dependent Claim
24 words
An apparatus as defined in claim 1, wherein the suction opening is formed as a plurality of pores arranged crosswise of the drum surface.
Claim 6
Dependent Claim
20 words
An apparatus as defined in claim 1, wherein the developer collecting means includes an absorbent material embedded in the drum.
Claim 7
Dependent Claim
39 words
An apparatus as defined in claim 5, wherein the absorbent material is embedded in a recess produced in the suction opening, the recess having a size sufficient to enable the absorbent material to be wholly embedded in the groove.
Claim 8
Dependent Claim
26 words
An apparatus as defined in claim 5, wherein the absorbent material covers the suction opening extending through the drum up to the outside of the drum.
Claim 9
Dependent Claim
37 words
An apparatus as defined in claim 1, wherein the drum has a section on which no sheet is placed, the developer collecting means including a groove-shaped recess produced crosswise of the drum in the sheetfree section thereof.
Claim 10
Independent Claim
180 words
An apparatus for producing an electrophotographic print on a photosensitive receptor movable through a plurality of predetermined stations so as to produce an electrostatic latent image on the photosensitive receptor, the apparatus comprising: a rotary drum having a peripheral surface defining an image forming section and a non-image forming section, the photosensitive receptor being placeable on the image forming section of the drum surface; a developing unit having at least one developing station for supplying a developer to the photosensitive receptor on the drum so as to make the electrostatic latent image visible; means for collecting the used developer from the photosensitive receptor, the collecting means being provided axially of the drum in the non-image forming section of the peripheral surface and including a suction opening on the drum surface connected to a sucking means provided externally of the drum, the suction opening being formed as a groove extending crosswise of the drum surface; and a developer absorbent material provided in the suction opening, so as to define a space between the absorbent material and the bottom of the groove.
Claim 11
Independent Claim
180 words
An apparatus for producing an electrophotographic print on a photosensitive receptor movable through a plurality of predetermined stations so as to produce an electrostatic latent image on the photosensitive receptor, the apparatus comprising: a rotary drum having a peripheral surface defining an image forming section and a non-image forming section, the photosensitive receptor being placeable on the image forming section of the drum surface; a developing unit having at least one developing station for supplying a developer to the photosensitive receptor on the drum so as to make the electrostatic latent image visible; means for collecting the used developer from the photosensitive receptor, the collecting means being provided axially of the drum in the non-image forming section of the peripheral surface and including a suction opening on the drum surface connected to a sucking means provided externally of the drum, the suction opening being formed as a groove extending crosswise of the drum surface; and a developer absorbent material provided in the suction opening, so as to define a space between the absorbent material and the bottom of the groove.
References Cited (Backward Citations)
US1928235A
Cited
US3741093A
Cited
US3618567A
Cited
US4110029A
Cited
US4208121A
Cited
US4270859A
Cited
US4358195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-27 | 1991-01-26 | 1991-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-27 | 1995-01-26 | 1995-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-27 | 1999-01-26 | 1999-07-28 | $7700.00 | Window Closed / Lapsed |