US3709593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic copying apparatus for polychromatic picture
Assignee: Toshiba Corp
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Filing: 1971-07-06
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Granted: 1973-01-09
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Expires: 1991-07-06
Abstract
Abstract Apparatus wherein a polychromatic original picture to be copied, an exposure mask for holding a piece of sensitive paper, and an optical system for projecting monochromatic optical images of the polychromatic original picture over the charged sensitive paper are made integral to construct a projection system, the projection system is rotated intermittently and relatively with respect at least to a developing device for an electrostatic image and a fixing device for a developed visible picture, a plurality of sectional positions are formed around the central line of the relative rotation, and monochromatic pictures of colors different from one another are formed on the lightsensitive member at the respectively selected ones among the plurality of sectional positions, whereby a polychromatic picture is copied.
Inventors
- 👤 Y Matsumoto
- 👤 M Sakai
- 👤 T Ozawa
- 👤 T Ochiai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:35
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/01; G03G15/0142
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
230 words
A polychromatic electrostatic apparatus comprising: light sources; projection units each of which integrally holds a polychromatic original picture and an exposure mask for flatly attaching a light-sensitive member thereto and projects said original picture over said light-sensitive member; charging means for charging the light-sensitive member which is attached to said exposure mask; filter means for spectralizing said original picture so as to project over the charged light-sensitive members optical images which correspond to monochromatic pictures different in colors from one another; developing means for converting into a visible picture each electrostatic image which is formed on said light-sensitive member by the projection; and fixing means for said visible picture wherein at least said projection units and developing means as well as fixing means are relatively and intermittently rotated so as to take at least three sectional positions around the center of the relative rotation; during one complete cycle of said relative rotation through said three sectional positions, said light-sensitive members fixed to said exposure masks in said three sectional positions are charged by said charging means; monochromatic pictures bearing different colors corresponding to each sectional position are focused on the charged lightsensitive members respectively by said light sources, projection units and filter means; and the light-sensitive members on which said monochromatic pictures are focused are developed and fixed by said respective developing and fixing means, thereby obtaining a polychromatic picture.
Claim 2
Dependent Claim
230 words
A polychromatic electrostatic apparatus comprising: light sources; projection units each of which integrally holds a polychromatic original picture and an exposure mask for flatly attaching a light-sensitive member thereto and projects said original picture over said light-sensitive member; charging means for charging the light-sensitive member which is attached to said exposure mask; filter means for spectralizing said original picture so as to project over the charged light-sensitive members optical images which correspond to monochromatic pictures different in colors from one another; developing means for converting into a visible picture each electrostatic image which is formed on said light-sensitive member by the projection; and fixing means for said visible picture wherein at least said projection units and developing means as well as fixing means are relatively and intermittently rotated so as to take at least three sectional positions around the center of the relative rotation; during one complete cycle of said relative rotation through said three sectional positions, said light-sensitive members fixed to said exposure masks in said three sectional positions are charged by said charging means; monochromatic pictures bearing different colors corresponding to each sectional position are focused on the charged lightsensitive members respectively by said light sources, projection units and filter means; and the light-sensitive members on which said monochromatic pictures are focused are developed and fixed by said respective developing and fixing means, thereby obtaining a polychromatic picture.
Claim 3
Dependent Claim
71 words
The polychromatic electrostatic copying apparatus according to claim 1, wherein the number of said sectional positions formed around said relative rotation is n and wherein the monochromatic pictures of colors different from one another are formed on said light-sensitive member at the respective ones of (n-1) sectional positions, while said light-sensitive member is attached to said exposure mask and the completed picture is taken out at the remaining one sectional position.
Claim 4
Dependent Claim
86 words
The polychromatic electrostatic copying apparatus according to claim 1, wherein the monochromatic pictures of colors different from one another are formed on said light-sensitive member at the respective ones of said plurality of sectional positions formed around said center of said relative rotation, said light-sensitive member is attached to said exposure mask at one optional sectional position, and the completed polychromatic picture is taken out at the sectional position which is adjacent to said one sectional position and at which the last monochromatic picture is formed.
Claim 5
Dependent Claim
65 words
The polychromatic electrostatic copying apparatus according to claim 1, wherein said developing means and said fixing means are caused to intermittently ascend at said sectional positions at which the monochromatic pictures are formed, the development and fixation are carried out at the ascent location, and said developing means and said fixing means are returned to the original locations after completion of said development and fixation.
Claim 6
Dependent Claim
61 words
The polychromatic electrostatic copying apparatus according to claim 1, wherein said projection system is caused to intermittently descend at said sectional positions at which the monochromatic pictures are formed, the development and fixation are carried out at the descent location, and said developing means and said fixing means are returned to the original locations after completion of said development and fixation.
Claim 7
Dependent Claim
115 words
The polychromatic electrostatic copying apparatus according to claim 1, wherein said projection system is so constructed that it is caused to intermittently ascend and descend from the original location at said sectional positions at which the monochromatic pictures are formed, said light-sensitive member is charged by said charging means in the midway of the ascent, said filter means is inserted into an optical path of said projection system and the exposure is carried out at the ascent location, the development and fixation are carried out by said developing means and said fixing means at the descent location, and said projection system is returned to the original location after completion of the developing and fixing operations.
Claim 8
Dependent Claim
76 words
The polychromatic electrostatic copying apparatus according to claim 6, wherein a nozzle of the hot-air type fixing means is open to a tank opening portion of said developing means and wherein drying fixation owing to hot air is carried out by said hot-air type fixing means in the midway of the ascent of the light-sensitive member after completion of the developing operation, said light-sensitive member passing through the opening portion of the tank in said ascent.
Claim 9
Dependent Claim
108 words
ThE polychromatic electrostatic copying apparatus according to claim 3, wherein first, second, third and fourth operational stages are formed at each of said plurality of sectional positions, the light-sensitive member is attached to said exposure mask and is charged and exposed to light at said first operational stage of said one optional sectional position, said polychromatic picture is taken out at said fourth operational stage of said sectional position at which said polychromatic picture is taken out, the electrostatic images are developed at said second operational stages of the respective sectional positions, and the developed pictures are fixed at said third operational stages of the respective sectional positions.
References Cited (Backward Citations)
US3130655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |