Patent US3875320A successfully refreshed from Google Patents.
US3875320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for electrostatic printing, products produced by such process, and use of these products
Assignee: Zellweger Uster AG
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Filing: 1972-07-14
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Granted: 1975-04-01
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Expires: 1992-07-14
Abstract
Abstract A process for producing printed images according to electrostatic printing techniques wherein at least during a portion of the time when a latent electrostatic charge image is produced at a carrier by means of a discharge operation occurring at an electrode arrangement there is carried out between the electrode arrangement and the carrier relative movements in alternate direction with movement components substantially parallel to the plane of the carrier.
Inventors
- 👤 Gabor Forgo
- 👤 Erwin Meyer
- 👤 Karl Moser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:18
CPC Classifications
G; 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: 28
Claim 1
Independent Claim
160 words
A process for producing printed images by electrostatic printing techniques, comprising the steps of producing a latent electrostatic charge image on a carrier by means of a discharge from an electrode means composed of individual electrodes, during at least a portion of the time span during which the discharge occurs for producing the latent electrostatic charge image on the carrier carrying out between the electrode means and the carrier relative movement in alternate directions with movement components essentially parallel to the plane of the carrier, producing by means of said relative movement in alternate directions occurring between the electrode means and the carrier a latent electrostatic charge image which is larger in size than the size of the width of the individual electrodes of the electrode means participating in the formation of such electrostatic charge image, and then applying toner to the thus produced electrostatic charge image to form a developed image, and fixing said developed image to said carrier.
Claim 2
Dependent Claim
160 words
A process for producing printed images by electrostatic printing techniques, comprising the steps of producing a latent electrostatic charge image on a carrier by means of a discharge from an electrode means composed of individual electrodes, during at least a portion of the time span during which the discharge occurs for producing the latent electrostatic charge image on the carrier carrying out between the electrode means and the carrier relative movement in alternate directions with movement components essentially parallel to the plane of the carrier, producing by means of said relative movement in alternate directions occurring between the electrode means and the carrier a latent electrostatic charge image which is larger in size than the size of the width of the individual electrodes of the electrode means participating in the formation of such electrostatic charge image, and then applying toner to the thus produced electrostatic charge image to form a developed image, and fixing said developed image to said carrier.
Claim 3
Dependent Claim
29 words
The process defined in claim 1, wherein said relative movement in alternate directions is achieved by maintaining the carrier stationary and moving the electrode means relative to the carrier.
Claim 4
Dependent Claim
31 words
The process as defined in claim 1, wherein said relative movement in alternate directions is achieved by maintaining the electrode means stationary and moving the carrier relative to the electrode means.
Claim 5
Dependent Claim
25 words
The process as defined in claim 1, wherein said relative movement in alternate directions is achieved by moving both the electrode means and the carrier.
Claim 6
Dependent Claim
37 words
The process as defined in claim 1, further includiNg the steps of changing the spacing between the electrode means and the carrier at least during a portion of the time the latent electrostatic charge image is formed.
Claim 7
Dependent Claim
21 words
The process as defined in claim 5, further comprising moving the electrode means relative to the carrier to change said spacing.
Claim 8
Dependent Claim
21 words
The process as defined in claim 5, further comprising moving the carrier relative to the electrode means to change said spacing.
Claim 9
Dependent Claim
25 words
The process as defined in claim 5, further comprising moving both the electrode means and the carrier relative to one another to change said spacing.
Claim 10
Dependent Claim
37 words
The process as defined in claim 5, wherein the relative movement in alternate directions takes place essentially simultaneously with the change in spacing between the electrode means and the carrier and in a direction substantially perpendicular thereto.
Claim 11
Dependent Claim
48 words
The process as defined in claim 5, wherein the relative movement in alternate directions occurs at a different time from the time during which there occurs said change in spacing direction between the electrode means and the carrier and is carried out in a direction substantially transverse thereto.
Claim 12
Dependent Claim
52 words
The process as defined in claim 1, further including the step of delivering the voltages necessary for producing the latent electrostatic charge image to the electrode means at least during a portion of the time span when there occurs the relative movement in alternate direction between the electrode means and the carrier.
Claim 13
Dependent Claim
72 words
The process as defined in claim 5, further including the step of delivering voltages to the electrode means at least during a portion of the time span when there occurs said relative movement in alternate directions which is transverse to the direction of the change of spacing and at least during a portion of the time span when there occurs a change in the spacing between the electrode means and the carrier.
Claim 14
Dependent Claim
33 words
The process as defined in claim 1, further including the step of providing an electrostatic printer, and stepwise moving the carrier to the electrostatic printer for producing a latent electrostatic charge image thereat.
Claim 15
Dependent Claim
28 words
The process as defined in claim 1, further including providing an electrostatic printer, and continuously the carrier to the electrostatic printer for producing the latent electrostatic charge image.
Claim 16
Dependent Claim
27 words
The process as defined in claim 1, further including providing a corona discharge device, and moving the carrier into the operable region of the corona discharge device.
Claim 17
Dependent Claim
38 words
The process as defined in claim 1, further including the step of delivering the carrier containing the latent electrostatic charge image to a developer and following developing of the electrostatic charge image removing the carrier from said developer.
Claim 18
Dependent Claim
39 words
The process as defined in claim 16, further including the step of delivering the carrier with the developed electrostatic charge image to a fixer and following fixing of the developed electrostatic charge image withdrawing such carrier from the fixer.
Claim 19
Dependent Claim
47 words
The process as defined in claim 1, wherein the amplitude of said relative movement in alternate direction is at least so large that the surface elements of the charge image produced by neighboring individual electrodes of the electrode means abut one another essentially without any intermediate spaces.
Claim 20
Dependent Claim
23 words
The process as defined in claim 18, wherein said amplitude is of a magnitude such that said surface elements slightly overlap one another.
Claim 21
Dependent Claim
41 words
The process as defined in claim 1, further including the step of providing a manually operated control for the selection of given individual electrodes of the electrode means, and applying a voltage thereto for the initiation and maintenance of said discharge.
Claim 22
Dependent Claim
39 words
The process as defined in claim 1, further including the step of automatically selecting the desired individual electrodes of the electrode means to which there is to be applied a voltage for initiating and further maintaining the discharge operation.
Claim 23
Dependent Claim
50 words
The process as defined in claim 1, further including the steps of providing a balance device having an output signal, and automatically applying voltage to the individual electrodes of the electrode means for producing a latent electrostatic charge image as a function of an output signal from the balance device.
Claim 24
Dependent Claim
49 words
The process as defined in claim 1, including the steps of providing an electrostatic printer, and storing the carriers for the latent electrostatic charge image upon a carrier foil strip at a supply device and delivering such carrier foil strip with the carriers mounted thereon to the electrostatic printer.
Claim 25
Dependent Claim
45 words
The process as defined in claim 23, including the step of moving the carrier foil strip with the thereon adhering carriers for the charge image such that the next successive carrier at the carrier foil strip assumes the position previously occupied by the preceding carrier.
Claim 26
Dependent Claim
81 words
The process as defined in claim 23, further including the step of guiding the carrier foil strip about a sharp edge in such a manner that owing to the greater stiffness of the carriers in relation to the carrier foil strip a carrier is detached from the carrier foil strip at the region of said sharp edge, and thereafter delivering the carrier separated from the carrier foil strip to a developer for the development of the electrostatic charge image located thereon.
Claim 27
Dependent Claim
26 words
The process as defined in claim 25, wherein the carrier freed from the carrier foil strip is delivered to a predetermined location for purposes of re-use.
Claim 28
Dependent Claim
23 words
The process as defined in claim 1, further including the step of employing the carrier as a label for the marking of articles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |