US4136611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printing directly onto paper
Assignee: Oki Electric Industry Co Ltd
•
Filing: 1977-06-22
•
Granted: 1979-01-30
•
Expires: 1997-06-22
Abstract
Abstract This invention provides for an improved high speed printer using electrostatic means. The paper used is ordinary paper that is first dried to increase its electrical resistance. The electrostatic image is produced directly on the ordinary paper and then the electrostatic image is developed and fixed thereon. The invention includes details of the heating means.
Inventors
- 👤 Akinori Watanabe
- 👤 Akio Nagano
- 👤 Katsuhide Tanoshima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:06
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G5/00; G03G5/02; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A high speed printer for obtaining visual images of figures on paper by developing and fixing electrostatic images or figures of characters, numerals, symbols, etc. after forming them, comprising in order, means for drying said paper prior to forming an image thereon, means for forming an electrostatic image on said paper, means for depositing visible grains on said electrostatic image for development thereof, and means for fixing said visible grains to said paper, said drying means comprising a heating drum formed of a semi-cylindrical heating plate including a heater for drying the paper and a semi-cylindrical non-heating part, said semi-cylindrical heating plate mating with said semi-cylindrical non-heating part to form said heating drum.
Claim 2
Dependent Claim
113 words
A high speed printer for obtaining visual images of figures on paper by developing and fixing electrostatic images or figures of characters, numerals, symbols, etc. after forming them, comprising in order, means for drying said paper prior to forming an image thereon, means for forming an electrostatic image on said paper, means for depositing visible grains on said electrostatic image for development thereof, and means for fixing said visible grains to said paper, said drying means comprising a heating drum formed of a semi-cylindrical heating plate including a heater for drying the paper and a semi-cylindrical non-heating part, said semi-cylindrical heating plate mating with said semi-cylindrical non-heating part to form said heating drum.
Claim 3
Dependent Claim
32 words
The invention as set forth in claim 1, wherein said semi-cylindrical heating plate comprises a heating coil embedded in a mica material and an external cover enclosing said coil and said mica.
Claim 4
Dependent Claim
33 words
The invention as set forth in claim 1, wherein said heating drum is formed of side circular flanges upon which said semi-cylindrical heating and non-heating parts are mounted to form a cylindrical structure.
Claim 5
Dependent Claim
33 words
The invention as set forth in claim 2, wherein said heating drum is formed of said circular flanges upon which said semi-cylindrical heating and non-heating parts are mounted to form a cylindrical structure.
References Cited (Backward Citations)
US995721A
Cited
US2691345A
Cited
US2716048A
Cited
US2726166A
Cited
US2817765A
Cited
US2832311A
Cited
US3160091A
Cited
US3752288A
Cited
US3771634A
Cited
US3806355A
Cited
GB1408505A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |