Patent US4240739A successfully refreshed from Google Patents.
US4240739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic copying apparatus
Assignee: Canon Inc
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Filing: 1977-05-05
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Granted: 1980-12-23
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Expires: 1997-05-05
Abstract
Abstract An automatic printing apparatus includes an image formation member for forming a master which may be repetitively subjected to the process of reproducing an original image, a rotatable drum capable of holding the image formation member thereon, an optical device for projecting therethrough the original image upon the image formation member on the rotatable drum, a heating member for heating the image formation member on the rotatable drum so as to form a chargeable image pattern corresponding to the image formed on the image formation member by the optical device, a charging device for forming an electrostatic image corresponding to the original image on the master formed by the optical device and the heating member, a developing device for developing the electrostatic image into a visible image, and a device for transferring the visible image from the master onto a recording medium.
Inventors
- 👤 Noboru Koumura
- 👤 Toshiyuki Komatsu
- 👤 Katsumi Nakagawa
- 👤 Nobuhiro Takekawa
- 👤 Motoharu Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:39
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/28; G03G15/30; G03G15/228
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
256 words
An automatic printing apparatus comprising: an image formation member for forming a master which may be repetitively subjected to a process of reproducing an original image; means for supporting the image formation member; a rotatable body capable of holding said image formation member on a periphery thereof; means for withdrawing the image formation member from said supporting means and for winding said member around said rotatable body; optical means for projecting an original image upon said image formation member on said rotatable body; heating means for heating said image formation member on said rotatable body to form said image formation member into a master carrying a permanent developed image of the original, said heating means being movable into and out of contact with said image formation member; recording process means for repeatedly effecting a recording process including forming a latent image of the permanent image on the master, developing the latent image into a visible image and transferring the visible image onto a recording medium, said process means being located adjacent the periphery of said rotatable body; means for bringing the recording medium into contact with the master at a transfer station for direct transfer of the visible image; and means for removing the master from said rotatable body after termination of operation of said recording process means; wherein the master is formed on said rotatable body and removed therefrom after recording process operations, and wherein another image formation member is then wound around the rotatable body to form another master for repeating the recording process.
Claim 2
Dependent Claim
256 words
An automatic printing apparatus comprising: an image formation member for forming a master which may be repetitively subjected to a process of reproducing an original image; means for supporting the image formation member; a rotatable body capable of holding said image formation member on a periphery thereof; means for withdrawing the image formation member from said supporting means and for winding said member around said rotatable body; optical means for projecting an original image upon said image formation member on said rotatable body; heating means for heating said image formation member on said rotatable body to form said image formation member into a master carrying a permanent developed image of the original, said heating means being movable into and out of contact with said image formation member; recording process means for repeatedly effecting a recording process including forming a latent image of the permanent image on the master, developing the latent image into a visible image and transferring the visible image onto a recording medium, said process means being located adjacent the periphery of said rotatable body; means for bringing the recording medium into contact with the master at a transfer station for direct transfer of the visible image; and means for removing the master from said rotatable body after termination of operation of said recording process means; wherein the master is formed on said rotatable body and removed therefrom after recording process operations, and wherein another image formation member is then wound around the rotatable body to form another master for repeating the recording process.
Claim 3
Dependent Claim
47 words
An apparatus according to claim 1, wherein said recording process means includes charging means for forming an electrostatic latent image corresponding to the permanent image on the master, and wherein the operations of said charging means and said image transfer means take place at the same position.
Claim 4
Dependent Claim
53 words
An apparatus according to claim 1, wherein said recording process means includes charging means for forming an electrostatic latent image corresponding to the permanent image on the master, and wherein during operation of said charging means, said developing means and said image transfer means, said heating means is spaced apart from said master.
Claim 5
Dependent Claim
67 words
An apparatus according to claim 1, wherein said recording process means includes charging means for forming an electrostatic latent image corresponding to the permanent image on the master, and further comprising secondary charging means for detecting the charged condition of said master imparted by said charging means and for further charging said master after said first-named charging to maintain said electrostatic image in a properly charged condition.
Claim 6
Dependent Claim
34 words
An apparatus according to claim 1, wherein said image formation member is mounted on said rotatable body in such a manner that the trailing end thereof overlaps a portion of the leading end thereof.
Claim 7
Dependent Claim
36 words
An apparatus according to claim 1, wherein the leading end portion of said image formation member is secured to said rotatable body while the other end portion thereof is free with respect to said rotatable body.
Claim 8
Dependent Claim
29 words
An apparatus according to claim 1, further comprising cleaning means for cleaning the surface of the master after the image transfer by said image transfer means has been effected.
Claim 9
Dependent Claim
30 words
An apparatus according to claim 1, further comprising cleaning means for intermittently cleaning the surface of the master after the image transfers by said image transfer means have been effected.
Claim 10
Dependent Claim
55 words
An apparatus according to claim 1, wherein said image formation member comprises a source of sheet material disposed in the interior of said rotatable body, and wherein said sheet material is disposed along a path leading from said interior, across a portion of the outer surface of said rotatable body, and back to said interior.
Claim 11
Dependent Claim
23 words
An apparatus according to claim 1, wherein said master may be separated from said rotatable body by reverse rotation of said rotatable body.
Claim 12
Dependent Claim
30 words
An apparatus according to claim 1, further comprising a plurality of process status display means for successively indicating the sequence of operations from the master formation to the image transfer.
Claim 13
Dependent Claim
44 words
An apparatus according to claim 1, further comprising means for discriminating whether said recording medium has been discharged from the apparatus, wherein such discrimination is made in accordance with the feeding time of said recording medium and the rotational position of said rotatable body.
Claim 14
Dependent Claim
46 words
An apparatus according to claim 1, wherein a first start position of said rotatable body at which said image formation member starts to wind around said rotatable body, is different from a second start position thereof at which said recording process means starts its process operation.
Claim 15
Dependent Claim
37 words
An apparatus according to claim 16, wherein said rotatable body temporarily stops at said second start position after it has started rotating from said first start position with said image formation member held by said rotatable body.
Claim 16
Dependent Claim
38 words
An apparatus according to claim 13, wherein said rotatable body temporarily stops at said first start position after it has started rotating from said second start position and has been repetitively acted on by said recording process means.
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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) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |