US4320186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrographic method for preparing original for projection and transfer film for use in method
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1980-04-11
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Granted: 1982-03-16
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Expires: 2000-04-11
Abstract
Abstract Disclosed is a method for preparing an original for projection by using a transfer film comprising a transparent plastic film substrate, an undercoating layer composed of an electrically conductive resin and having a surface resistance of 1.0×10 6 to 9.0×10 9 Ω, and a toner receiving layer composed of a binder resin and having a surface resistance of 1.0×10 10 to 1.0×10 14 Ω, which is formed on at least one surface of the transparent plastic film substrate through the undercoating layer. An original for projection which is excellent in the surface smoothness and image characteristics can be obtained by electrostatically transferring an image of a one-component type magnetic developer on a photosensitive plate for the electrostatic photography, onto the toner receiving layer of the above transfer film and bringing the transferred developer image into contact with a roller under application of a pressure to fix the developer image on the toner receiving layer.
Inventors
- 👤 Mamoru Kato
- 👤 Shoji Matsumoto
- 👤 Tatsuo Aizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:51
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/22; G03G7/00; G03G7/0006; G03G7/0053; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10T; Y10T428/00; Y10T428/27; Y10T428/273; Y10T428/31; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
A method for preparing an original for projection, which comprises electrostatically transferring an image of a one-component type magnetic developer which has been formed on a photosensitive plate for electrostatic photography onto a toner receiving layer of a transparent transfer film, said transparent film comprising a transparent, heat-resistant plastic film substrate, said toner receiving layer, and an undercoating layer interposed between said substrate and said toner receiving layer, said toner receiving layer comprising a binder resin in an amount of at least 1.0 g/m 2 on a dry basis and having a surface resistance of 1.0×10 10 to 1.0×10 13 Ω, said undercoating layer comprising an electrically conductive resin in an amount of at least 1.0 g/m 2 on a dry basis and having a surface resistance of 1.0×10 6 to 9.0×10 9 Ω, and bringing the transferred developer image into contact with the surface of a roller under application of pressure, thereby fixing the transferred developer image on said toner receiving layer.
Claim 2
Independent Claim
163 words
A method for preparing an original for projection, which comprises electrostatically transferring an image of a one-component type magnetic developer which has been formed on a photosensitive plate for electrostatic photography onto a toner receiving layer of a transparent transfer film, said transparent film comprising a transparent, heat-resistant plastic film substrate, said toner receiving layer, and an undercoating layer interposed between said substrate and said toner receiving layer, said toner receiving layer comprising a binder resin in an amount of at least 1.0 g/m 2 on a dry basis and having a surface resistance of 1.0×10 10 to 1.0×10 13 Ω, said undercoating layer comprising an electrically conductive resin in an amount of at least 1.0 g/m 2 on a dry basis and having a surface resistance of 1.0×10 6 to 9.0×10 9 Ω, and bringing the transferred developer image into contact with the surface of a roller under application of pressure, thereby fixing the transferred developer image on said toner receiving layer.
Claim 3
Dependent Claim
34 words
The method of claim 1 wherein said transfer film comprises said substrate, said undercoating layer on both surfaces of said substrate and said toner receiving layer on at least one of said undercoating layers.
Claim 4
Dependent Claim
44 words
A method for preparing an original for projection according to claim 1, wherein the one-component type magnetic developer is composed of particles formed by shaping a dispersion of a finely divided magnetic material in a binder medium comprising a wax and a resin binder.
Claim 5
Dependent Claim
37 words
A method for preparing an original for projection according to claim 1, wherein fixation of the transferred developer image is performed by a roller having a linear pressure of at least 15 Kg/cm of the roller length.
Claim 6
Dependent Claim
42 words
A method as set forth in claim 1, wherein the undercoating layer is formed in an amount coated of 1.0 to 10.0 g/m 2 and the toner receiving layer is formed in an amount coated of 1.0 to 10.0 g/m 2 .
Claim 7
Dependent Claim
20 words
A method film as set forth in claim 1, wherein the film substrate is a biaxially stretched polyethylene terephthalate film.
Claim 8
Dependent Claim
25 words
A method film as set forth in claim 1, wherein said electrically conductive resin is a cationic, electrically conductive resin having a quaternary ammonium group.
Claim 9
Dependent Claim
30 words
A method film as set forth in claim 1, wherein said electrically conductive resin is an anionic, electrically conductive resin of the sulfonic acid, carboxylic acid or phosphonic acid type.
Claim 10
Dependent Claim
28 words
A method film as set forth in claim 1, wherein said binder resin is a thermoplastic resin having a glass transition temperature (Tg) of -50° to 150° C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-03-15 | 1985-09-14 | 1986-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-15 | 1989-09-14 | 1990-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-15 | 1993-09-14 | 1994-03-16 | $7700.00 | Window Closed / Lapsed |