Patent US3990793A successfully refreshed from Google Patents.
← Back to Patent Explorer
US3990793A Expired / Lapsed US ⏱️ 0.0 years remaining

Developing station for electronic color photographing apparatus

Assignee: Hitachi Ltd
•
Filing: 1974-08-23
•
Granted: 1976-11-09
•
Expires: 1994-08-23
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract In an electronic photographing apparatus, the offset phenomenon which tends to occur due to the conveyance of a developed photosensitive paper by a guide roller and which results in the distortion in a reproduced image is prevented by electrically insulating the toner particles fixed on the photosensitive paper from the guide roller.

Inventors

  • 👤 Masayasu Anzai
  • 👤 Hiroshi Yonezawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 01:11
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/10

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 100 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising roller means including a metal roller for guiding the photosensitive paper into a developing solution, said metal roller contacting the surface of the photosensitive paper on which a color picture image is to be developed, said metal roller being supported by conductive bearings; means for maintaining said metal roller in a non-grounded state; and a resistor of high resistance provided between said metal roller and ground, said resistor including resistive rings supporting said conductive bearings.
Claim 2
Dependent Claim 100 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising roller means including a metal roller for guiding the photosensitive paper into a developing solution, said metal roller contacting the surface of the photosensitive paper on which a color picture image is to be developed, said metal roller being supported by conductive bearings; means for maintaining said metal roller in a non-grounded state; and a resistor of high resistance provided between said metal roller and ground, said resistor including resistive rings supporting said conductive bearings.
Claim 3
Dependent Claim 218 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising roller means for guiding the photosensitive paper into a developing solution, said roller means contacting the surface of the photosensitive paper on which a color picture image is to be developed, wherein said roller means include at least two guide rollers, one of said two guide rollers having a metal peripheral surface and the other of said two guide rollers having a rubber peripheral surface, and wherein said one guide roller having said metal peripheral surface contacts said surface of said photosensitive paper, means for forming a thin film of said developing solution on the surfaces of said roller means, and a reservoir of said developing solution and guide means for guiding said photosensitive paper from said two guide rollers through said reservoir, wherein said means for forming a thin film includes means for flowing said developing solution from said reservoir against said two guide rollers, wherein said means for flowing include a brim of said guide means over which brim said developing solution flows against said two guide rollers, and wherein said other guide roller having said rubber peripheral surface transports said developing solution to a recess between said two guide rollers.
Claim 4
Dependent Claim 218 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising roller means for guiding the photosensitive paper into a developing solution, said roller means contacting the surface of the photosensitive paper on which a color picture image is to be developed, wherein said roller means include at least two guide rollers, one of said two guide rollers having a metal peripheral surface and the other of said two guide rollers having a rubber peripheral surface, and wherein said one guide roller having said metal peripheral surface contacts said surface of said photosensitive paper, means for forming a thin film of said developing solution on the surfaces of said roller means, and a reservoir of said developing solution and guide means for guiding said photosensitive paper from said two guide rollers through said reservoir, wherein said means for forming a thin film includes means for flowing said developing solution from said reservoir against said two guide rollers, wherein said means for flowing include a brim of said guide means over which brim said developing solution flows against said two guide rollers, and wherein said other guide roller having said rubber peripheral surface transports said developing solution to a recess between said two guide rollers.
Claim 5
Dependent Claim 25 words
A developing station according to claim 2, wherein said thin film of developing solution provides electrical insulation between said roller means and said photosensitive paper.
Claim 6
Dependent Claim 27 words
A developing station according to claim 2, wherein means are provided for cleaning said one guide roller having said metal peripheral surface, thereby forming said thin film.
Claim 7
Dependent Claim 184 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising: roller means for guiding the photosensitive paper, said roller means including at least two guide rollers between which said photosensitive paper is sandwiched and guided, one of said two guide rollers having a metal peripheral surface contacting the surface of said photosensitive paper on which a color picture image is to be developed, the other of said two guide rollers having a rubber peripheral surface contacting the other surface of said photosensitive paper; guide means for guiding said photosensitive paper from said roller means through a developing solution, said guide means including a guide plate on which said developing solution is supplied; and thin film forming means for forming a thin film of said developing solution on the surfaces of said roller means, said thin film forming means including a brim of said guide means over which brim said developing solution on said guide plate flows against the surface of said other guide roller having said rubber peripheral surface.
Claim 8
Dependent Claim 184 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising: roller means for guiding the photosensitive paper, said roller means including at least two guide rollers between which said photosensitive paper is sandwiched and guided, one of said two guide rollers having a metal peripheral surface contacting the surface of said photosensitive paper on which a color picture image is to be developed, the other of said two guide rollers having a rubber peripheral surface contacting the other surface of said photosensitive paper; guide means for guiding said photosensitive paper from said roller means through a developing solution, said guide means including a guide plate on which said developing solution is supplied; and thin film forming means for forming a thin film of said developing solution on the surfaces of said roller means, said thin film forming means including a brim of said guide means over which brim said developing solution on said guide plate flows against the surface of said other guide roller having said rubber peripheral surface.
Claim 9
Dependent Claim 242 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising: roller means for guiding the photosensitive paper, said roller means including at least two guide rollers between which said photosensitive paper is sandwiched and guided, one of said two guide rollers having a metal peripheral surface contacting the surface of said photosensitive paper on which a color picture image is to be developed, the other of said two guide rollers having a rubber peripheral surface contacting the other surface of said photosensitive paper; guide means for guiding said photosensitive paper from said roller means through a developing solution, said guide means including a guide plate on which said developing is supplied; and thin film forming means for forming a thin film of said developing solution on the surfaces of said roller means, said thin film forming means including a tray for receiving therein the developing solution flowing over a brim of said guide plate to provide a level at which the surface of the developing solution in said tray contacts a portion of said rubber peripheral surface of said other guide roller so that with the rotation of said other guide roller a part of the developing solution in said tray is drawn up along said rubber peripheral surface and further fed to said metal peripheral surface of said one guide roller, thereby forming said thin film.
Claim 10
Dependent Claim 242 words
A developing station for electronic color photographing apparatus into which station a developing solution wetted photosensitive paper is roller-guided after charging and exposing thereof, comprising: roller means for guiding the photosensitive paper, said roller means including at least two guide rollers between which said photosensitive paper is sandwiched and guided, one of said two guide rollers having a metal peripheral surface contacting the surface of said photosensitive paper on which a color picture image is to be developed, the other of said two guide rollers having a rubber peripheral surface contacting the other surface of said photosensitive paper; guide means for guiding said photosensitive paper from said roller means through a developing solution, said guide means including a guide plate on which said developing is supplied; and thin film forming means for forming a thin film of said developing solution on the surfaces of said roller means, said thin film forming means including a tray for receiving therein the developing solution flowing over a brim of said guide plate to provide a level at which the surface of the developing solution in said tray contacts a portion of said rubber peripheral surface of said other guide roller so that with the rotation of said other guide roller a part of the developing solution in said tray is drawn up along said rubber peripheral surface and further fed to said metal peripheral surface of said one guide roller, thereby forming said thin film.

References Cited (Backward Citations)

US3155546A Cited
US3345925A Cited
US3249088A Cited
US3416860A Cited
US3601092A Cited
US3685907A Cited
US3749059A Cited
US3651782A Cited
US3820891A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-11-09 1980-05-10 1980-11-09 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-11-09 1984-05-10 1984-11-09 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-11-09 1988-05-10 1988-11-09 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag