Patent US3886563A successfully refreshed from Google Patents.
US3886563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic printer with movable style
Assignee: Zellweger Uster AG
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Filing: 1973-08-31
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Granted: 1975-05-27
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Expires: 1993-08-31
Abstract
Abstract An apparatus for the production of printed images according to electrostatic printing techniques comprising guide means for the electrode arrangement and/or the aforesaid carrier or the counter electrode serving as its support, and means cooperating with the guide means for carrying out a change in the spacing between the electrode arrangement serving to produce the latent charge image and the carrier for the reception of the latent charge image or its counterelectrode.
Inventors
- 👤 Gabor Forgo
- 👤 Erwin Meyer
- 👤 Karl Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; G06K1/128; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; Y; Y10; Y10S; Y10S101/00; Y10S101/37; Y10S430/00; Y10S430/001; Y10S430/102; Y10S430/138
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
147 words
An apparatus for producing printed images by electrostatic printing techniques, comprising an electrode arrangement and a countErelectrode serving as a support for a carrier for the reception of a latent electrostatic charge image, and means for carrying out a change in spacing between the electrode arrangement and the carrier during the application of an electrostatic charge image to said carrier in order to cause partial discharges for the formation of the electrostatic charge image to travel through different paths across the space between the electrode arrangement and the carrier to provide a substantially uniform deposit of charges at the carrier and therefore a substantially uniform potential distribution within the confines of the electrostatic charge image to be produced, so as to induce a substantially uniform covering of toner particles over the surface of the electrostatic charge image to thereby improve the quality of the electrostatically printed image.
Claim 2
Independent Claim
147 words
An apparatus for producing printed images by electrostatic printing techniques, comprising an electrode arrangement and a countErelectrode serving as a support for a carrier for the reception of a latent electrostatic charge image, and means for carrying out a change in spacing between the electrode arrangement and the carrier during the application of an electrostatic charge image to said carrier in order to cause partial discharges for the formation of the electrostatic charge image to travel through different paths across the space between the electrode arrangement and the carrier to provide a substantially uniform deposit of charges at the carrier and therefore a substantially uniform potential distribution within the confines of the electrostatic charge image to be produced, so as to induce a substantially uniform covering of toner particles over the surface of the electrostatic charge image to thereby improve the quality of the electrostatically printed image.
Claim 3
Dependent Claim
28 words
The apparatus as defined in claim 1, wherein said means for carrying out said change in spacing includes an axially displaceably mounted holder mechanism for the electrode arrangement.
Claim 4
Dependent Claim
44 words
The apparatus as defined in claim 1, including means for moving said carrier and said electrode arrangement during the application of an electrostatic charge inmage to said carrier and relatively of each other in a plane substantially parallel to the plane of the carrier.
Claim 5
Dependent Claim
101 words
The apparatus as defined in claim 1, wherein said means for carrying out a change in spacing comprises a holder mechanism for said electrode arrangement including an axially displaceable shaft, a support member, a pivotal frame having a pivot arm pivotally mounted to said support member, a flange secured to said axially displaceable shaft, one end of said pivot arm bearing in movable relation on said flange, and an electromagnetic system connected to the other end of said pivot arm and which when energized axially displaces said shaft together with said holder mechanism for the electrode arrangement relative to the carrier.
Claim 6
Dependent Claim
34 words
The apparatus as defined in claim 4, further including spring means, the spring force of which serves to approach said shaft and said electrode arrangement towards the carrier for the latent electrostatic charge image.
Claim 7
Dependent Claim
29 words
The apparatus as defined in claim 1, wherein said counterelectrode is provided with bore means, a vacuum device, and a conduit communicating said bore means with said vacuum device.
Claim 8
Dependent Claim
23 words
The apparatus as defined in claim 1, further including an electromagnetically actuated clamping mechanism for the carrier for the latent electrostatic charge image.
Claim 9
Dependent Claim
43 words
The apparatus as defined in claim 1, wherein said electrode arrangement comprises individual electrodes, and means for furnishing voltage to predetermined individual electrodes of said electrode arrangement associated with charged surface elements of the latent electrostatic charge image which is to be produced.
Claim 10
Dependent Claim
30 words
The apparatus as defined in claim 1, further including feed means for the predetermined feed of a carrier foil strip with carriers adhering thereto along a predetermined path of travel.
Claim 11
Dependent Claim
27 words
The apparatus as defined in claim 9, further including a corona discharge device effective at a given location of the predetermined path of travel of the carriers.
Claim 12
Dependent Claim
21 words
The apparatus as defined in claim 10, wherein the latent electrostatic charge image and the corona discharge device possess different polarity.
Claim 13
Dependent Claim
35 words
The apparatus as defined in claim 1, further including a movable element by means of which a carrier provided with a latent electrostatic charge image can be selectively advanced towards and away from a developer.
Claim 14
Dependent Claim
29 words
The apparatus as defined in claim 1, further including a movable element by means of which a carrier can be advanced towards and removed from a corona discharge device.
Claim 15
Dependent Claim
29 words
The apparatus as defined in claim 12, wherein said movable element serves to move a carrier with a developed electrostatic charge image thereat towards and away from a fixer.
Claim 16
Dependent Claim
35 words
The apparatus as defined in claim 1, further including a movable element by means of which the carrier can be delivered with its charge image thereat to an opening of the apparatus for removal therefrom.
Claim 17
Dependent Claim
24 words
The apparatus as defined in claim 15, further including mechanism for removing a carrier provided with the electrostatically produced image from the movable element.
Claim 18
Dependent Claim
22 words
The apparatus as defined in claim 1, further including means for receiving a carrier foil strip freed of carriers originally adhering thereto.
Claim 19
Dependent Claim
55 words
The apparatus as defined in claim 1, further including a movable carrier foil strip for the carriers, means defining a sharp edge at the path of movement of the carrier foil strip and at which sharp edge there occurs detachment of a carrier equipped with a latent electrostatic charge image from such carrier foil strip.
Claim 20
Dependent Claim
20 words
The apparatus as defined in claim 1, further including a developer having magnetic brush means for the electrostatic charge image.
Claim 21
Independent Claim
166 words
An apparatus for producing printed images by electrostatic printing at a carrier for receiving a latent electrostatic charge image, comprising a pair of confronting electrodes arranged in spaced relationship for receiving therebetween a carrier for the latent electrostatic charge image, the confronting surfaces of said electrodes being substantially parallel to each other, and means for altering the spacing between such pair of electrodes while maintaining the substantially parallel relation therebetween during the application of an electrostatic charge image to said carrier in order to cause partial discharges for the formation of the electrostatic charge image to travel through different paths across the space between the pair of electrodes to provide a substantially uniform deposit of charges at the carrier and therefore a substantially uniform potential distribution within the confines of the electrostatic charge image to be produced, so as to induce a substantially uniform covering of toner particles over the surface of the electrostatic charge image to thereby improve the quality of the electrostatically printed image.
Claim 22
Independent Claim
166 words
An apparatus for producing printed images by electrostatic printing at a carrier for receiving a latent electrostatic charge image, comprising a pair of confronting electrodes arranged in spaced relationship for receiving therebetween a carrier for the latent electrostatic charge image, the confronting surfaces of said electrodes being substantially parallel to each other, and means for altering the spacing between such pair of electrodes while maintaining the substantially parallel relation therebetween during the application of an electrostatic charge image to said carrier in order to cause partial discharges for the formation of the electrostatic charge image to travel through different paths across the space between the pair of electrodes to provide a substantially uniform deposit of charges at the carrier and therefore a substantially uniform potential distribution within the confines of the electrostatic charge image to be produced, so as to induce a substantially uniform covering of toner particles over the surface of the electrostatic charge image to thereby improve the quality of the electrostatically printed image.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |