Patent US3571678A successfully refreshed from Google Patents.
US3571678A
Expired / Lapsed
US
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Electrostatic recording paper holding device
Assignee: WATANABE INSTRUMENTS CORP
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Filing: 1968-09-03
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Granted: 1971-03-23
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Expires: 1988-09-03
Abstract
Abstract An electrostatic recording paper holding device adapted to be employed in connection with a recording instrument and comprising as its base a flexible insulating resin sheet or film having on one side a metallic layer vapor-deposited or in adhesion which forms one electrode and on the other side a semiconductor layer coated thereon which supports a conductive pattern provided with a plurality of openings therein which in turn supports a metallic frame at portion thereof, and an electric circuit connected to said metallic layer and conductive pattern and including a switch and DC power source.
Inventors
- 👤 Muneyoshi Sezako
- 👤 Isao Nagayasu
- 👤 Haruo Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:42
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/28; G01D11/00; G01D11/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
226 words
An electrostatic recording paper holding device adapted to be mounted on the support structure of a recording instrument, said holding device comprising: a means to support fixedly an insulating sheet; a flexible insulating sheet having on one side adjacent said means to support an anode means; on the opposite side of said anode means a cathode means comprising: a semiconductor layer having a specific resistance sufficient to discharge an electric charge in a brief period of times, means to interpose a recording paper upon and in frictional contact with said semiconductive layer as the said paper is moved on said holding device over the said semiconductor layer, said semiconductor layer supporting thereon a conductive pattern with a plurality of openings therein so as to expose portions of the semiconductive layer to said recording paper, and and a DC power supply circuit including a DC power source and a switch for energizing said circuit, said several means being so arranged relative to each other that when said circuit is energized a DC voltage is applied across the said anode and the said cathode and the said cathode to form parallel lines of electric forces across them, the said conductive pattern functioning as an electrical terminal, and the said recording paper, having a high electric resistance value, itself functioning as the negative electrode attracted to the said anode.
Claim 2
Dependent Claim
226 words
An electrostatic recording paper holding device adapted to be mounted on the support structure of a recording instrument, said holding device comprising: a means to support fixedly an insulating sheet; a flexible insulating sheet having on one side adjacent said means to support an anode means; on the opposite side of said anode means a cathode means comprising: a semiconductor layer having a specific resistance sufficient to discharge an electric charge in a brief period of times, means to interpose a recording paper upon and in frictional contact with said semiconductive layer as the said paper is moved on said holding device over the said semiconductor layer, said semiconductor layer supporting thereon a conductive pattern with a plurality of openings therein so as to expose portions of the semiconductive layer to said recording paper, and and a DC power supply circuit including a DC power source and a switch for energizing said circuit, said several means being so arranged relative to each other that when said circuit is energized a DC voltage is applied across the said anode and the said cathode and the said cathode to form parallel lines of electric forces across them, the said conductive pattern functioning as an electrical terminal, and the said recording paper, having a high electric resistance value, itself functioning as the negative electrode attracted to the said anode.
Claim 3
Dependent Claim
93 words
An electrostatic recording paper holding device as set forth in claim 1, said anode means being a metallic layer on the said insulating sheet in adhesion with the surface of said means to support; said semiconductor layer and said conductive pattern cooperating with said means to support to keep said recording paper thereon whereby when a DC voltage is applied across the metallic layer and the conductive pattern a potential is applied to said semiconductive layer having the same polarity as that of the pattern, but opposite to that of the metallic layer.
Claim 4
Dependent Claim
22 words
An electrostatic recording paper holding device as set forth in claim 1, in which said insulating shEet is formed of synthetic resins.
Claim 5
Dependent Claim
24 words
An electrostatic recording paper holding device as set forth in claim 1, in which said metallic layer is vapor-deposited of on said insulating sheet.
Claim 6
Dependent Claim
81 words
An electrostatic recording paper holding device as set forth in claim 1, in which said semiconductive layer is coated on the side of said insulating sheet opposite to said means to support and has the specific resistance of 1010-1013 and said conductive pattern is formed by coated stripes intersecting at right angles and peripheral edge stripe interconnecting said intersecting stripes at their opposite ends in a netlike formation so as to form spaces each having an area of 1-2 cm2 therebetween.
Claim 7
Dependent Claim
33 words
An electrostatic recording paper holding device as set forth in claim 1, in which said conductive pattern is formed by printing stripes of conductive paint on the free surface of said semiconductive layer.
Claim 8
Dependent Claim
32 words
An electrostatic recording paper holding device as set forth in claim 1, in which said conductive pattern is formed by strips of metallic adhering to the free surface of said semiconductive layer.
Claim 9
Dependent Claim
42 words
An electrostatic recording paper holding device as set forth in claim 1, in which a conductive frame is superimposed on said peripheral edge stripe of the conductive pattern and a DC voltage is applied on the conductive pattern through said conductive frame.
Claim 10
Dependent Claim
38 words
An electrostatic recording paper holding device as claimed in claim 1, said plurality of openings in said conductive pattern being formed with coated stripes equidistantly spaced from each other a distance of between about 1 to 2 cm.
Claim 11
Dependent Claim
23 words
An electrostatic recording paper holding device as claimed in claim 1, said anode comprising a metallic layer in adhesion with said insulating sheet.
Claim 12
Dependent Claim
29 words
An electrostatic recording paper holding device as claimed in claim 1, said semiconductive layer being coated on said sheet to exhibit a specific resistance of 1010 to 1013 ohm.
References Cited (Backward Citations)
US3359469A
Cited
US3448356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |