US3792964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic imaging system and apparatus therefor
Assignee: Individual
•
Filing: 1972-06-05
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Granted: 1974-02-19
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Expires: 1992-06-05
Abstract
Abstract A copying machine having means for producing a fusible toner image on a copy substrate, includes a radiant energy light source (e.g., iodine quartz lamp) mounted to direct part of its rays onto the object that is to be copied to illuminate the latter, and part onto the surface of a rotating receiver roll to heat the surface thereof approximately to the fusing temperature of the toner. The copy substrate is passed beneath the receiver roll tangentially thereof by a transport which causes the toner image to engage the heated receiver surface with a minimal amount of pressure so that the toner is fused and fixed to the substrate. Various release agents may be applied to the roll surface to enhance fixing of the image.
Inventors
- 👤 A Chatterji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:05
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/04036; G03G15/20; G03G15/2003; G03G15/2014; G03G15/2064
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
Copying apparatus of the type in which a heat fusible toner image is produced on the surface of a copy substrate, including a rotatable receiver, means for transporting a substrate with a toner image thereon tangentially past a curved surface on said receiver to cause substantially pressureless contact between said toner image and said curved surface, and a radiant energy emitter mounted adjacent said receiver to direct radiant energy onto said curved surface to heat the latter sufficiently to effect fusion of said toner upon contact thereof with said curved surface.
Claim 2
Dependent Claim
91 words
Copying apparatus of the type in which a heat fusible toner image is produced on the surface of a copy substrate, including a rotatable receiver, means for transporting a substrate with a toner image thereon tangentially past a curved surface on said receiver to cause substantially pressureless contact between said toner image and said curved surface, and a radiant energy emitter mounted adjacent said receiver to direct radiant energy onto said curved surface to heat the latter sufficiently to effect fusion of said toner upon contact thereof with said curved surface.
Claim 3
Dependent Claim
41 words
Copying apparatus as defined in claim 1, wherein said emitter produces light having wave lengths of from about 0.3 microns to about 10 microns, and said curved surface has a reflectivity of at least approximately 0.2 and preferably 0.6 or higher.
Claim 4
Dependent Claim
18 words
Copying apparatus as defined in claim 2, wherein said curved surface has a transmissivity of less than 0.5.
Claim 5
Dependent Claim
58 words
Copying apparatus as defined in claim 1, wherein said receiver is a cylinder, means is provided for rotating said cylinder about its axis, and said transporting means comprises resilient means having rolling engagement with said cylinder substantially tangentially thereof, and with just enough pressure to cause the rotation of said cylinder to be transmitted to said resilient means.
Claim 6
Dependent Claim
48 words
Copying apparatus as defined in claim 4, wherein said resilient means comprises a plurality of resilient rings mounted to rotate about a common axis adjacent said cylinder, and having the peripheral surfaces thereof disposed in rolling engagement with the periphery of said cylinder at axially spaced points therealong.
Claim 7
Dependent Claim
48 words
Copying apparatus as defined in claim 4, wherein said rotating means comprises a reversible electric motor drivingly connected to said cylinder, and switch means is positioned adjacent said nip to be responsive to a substrate jam at said nip to reverse the direction of rotation of said motor.
Claim 8
Dependent Claim
59 words
Copying apparatus as defined in claim 1, including a support, means for projecting an image of an object on said support onto an adjacent, light-sensitive surface to form thereon a latent image of the object, when said object is illuminated, and means for transmitting part of the energy from said emitter onto said support to illuminate the object thereon.
Claim 9
Dependent Claim
34 words
Copying apparatus as defined in claim 7, said light transmitting means comprises a bundle of fiber optics having one end facing said emitter, and its opposite end facing said support and the object thereon.
Claim 10
Dependent Claim
29 words
Copying apparatus as defined in claim 2, wherein said emitter comprises at least one iodine quartz lamp mounted in spaced confronting relation with said curved surface on said receiver.
References Cited (Backward Citations)
US876007A
Cited
US3716221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |