US3702001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrosensitive printing or recording and apparatus therefor
Assignee: Olivetti SpA
•
Filing: 1970-04-15
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Granted: 1972-10-31
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Expires: 1990-04-15
Abstract
Abstract A method and apparatus for electrosensitive printing or recording on a trackless, untreated paper sheet which utilizes a head consisting of a pair or series of pairs of electrodes located on the same side of the paper sheet, the electrodes of each pair being opposite in polarity and the head being coupled to a device for impregnating the paper sheet with an electrolytic solution immediately before printing or recording thereon.
Inventors
- 👤 Teresio Gassino
- 👤 Alfredo Olivei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:56
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/22; G03G15/32; G03G15/321; G03G15/325; B; B41; B41J; B41J2/00; B41J2/385; B41J2/3855; B41M; B41M5/00; B41M5/20; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
22 words
An apparatus as claimed in claim 1, including a wetting device positioned on an axis drawn through said pair of spaced electrodes.
Claim 2
Dependent Claim
61 words
An apparatus as claimed in claim 1, wherein said electrode system further comprises a head including a first row of electrodes of a given polarity and a second row of electrodes of an opposite polarity parallel and closely adjacent to said first row of electrodes, and a wetting device adjacent to said head and biased into engagement with said receiving element.
Claim 3
Dependent Claim
92 words
An apparatus as claimed in claim 3, wherein said head comprises a series of electrode pairs, the electrodes of each of said pairs being symmetrically distributed about a central axis through said head, said electrodes being encased in a support plate of insulating material such that said electrodes of each of said first and second rows are near to one another in the area adjacent said receiving element and divergent in the area remote from said receiving element to facilitate the electric connection of said head to a source of electrical impulses.
Claim 4
Dependent Claim
42 words
An apparatus as claimed in claim 3, wherein said wetting device is connected to a reservoir containing an electrolytic solution, and reservoir and said electrolytic solution being under pressure to force said solution through said slit into contact with said receiving element.
Claim 5
Dependent Claim
34 words
An apparatus as claimed in claim 3, including a platen supporting said receiving element and wherein said head is provided with a slight concavity having a radius equal to the radius of said platen.
Claim 6
Dependent Claim
56 words
An apparatus as claimed in claim 3, wherein said means for relative movement comprise a movable support for said head and a guide slidably carrying said support for movement relative to said receiving element substantially perpendicular to said main axis, and wherein said wetting device is connected to said reservoir by means of a flexible pipe.
Claim 7
Dependent Claim
40 words
An apparatus as claimed in claim 3, wherein said wetting device comprises a duct and a slit exit for said duct which is parallel to a central axis of said head established between said first and second rows of electrodes.
Claim 8
Dependent Claim
26 words
An apparatus as claimed in claim 8, wherein the wetting device is mounted on a support which is held in sliding engagement in a guide housing.
Claim 9
Dependent Claim
37 words
An apparatus as claimed in claim 9, wherein said head is mounted on said support such that when said support is biased toward said receiving element only said head and said wetting device engage said receiving element.
Claim 10
Independent Claim
110 words
A method of electrosensitive printing and recording information on a receiving element comprising the steps of: a. positioning at least one pair of electrodes on the same side of said receiving element, one electrode of said electrode pair being of a given polarity and the other electrode of said electrode pair being of an opposite polarity, said electrodes being in side-by-side linear relationship; b. moving said receiving element first past said one electrode and then past said other electrode in a direction parallel to the linear placement of said electrodes; and c. supplying to said electrodes electrical impulses to form, by means of spots, alpha-numeric signs on said receiving element.
Claim 11
Dependent Claim
37 words
The method as claimed in claim 11 further including: a. depositing an electrolytic solution on said receiving element by means of a wetting device positioned adjacent said receiving element on the same side thereof as said electrodes.
Claim 12
Dependent Claim
86 words
The method as claimed in claim 12, wherein said recording head includes a first row of electrodes of a given polarity and a second row of electrodes of an opposite polarity parallel and adjacent to said first row, and said wetting device is parallel to the main axis oF the recording head between said first and second electrode rows, said method including the step of moving said recording element past said first row of electrodes, said wetting device and said second row of electrodes in succession.
Claim 13
Dependent Claim
26 words
The method of claim 12, including the step of applying a solution comprising potassium iodide, potassium bromide and starch in the presence of polyvinylalcohol and thiourea.
Claim 14
Dependent Claim
25 words
The method of claim 12, including the step of applying said electrolytic solution to the receiving element in the immediate vicinity of said electrode head.
Claim 15
Dependent Claim
29 words
The method of claim 12 including the step of limiting said electrical impulses to voltages on the order of 5 volts and currents in the order of 1 milliampere.
Claim 16
Dependent Claim
20 words
The method of claim 12 including limiting the duration of each of said electrical impulses to less than 20 microseconds.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |