US3920873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrosensitive recording media
Assignee: Individual
•
Filing: 1973-11-09
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Granted: 1975-11-18
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Expires: 1993-11-09
Abstract
Abstract Particular embodiments illustrate improved spark recording media, including electroresistive material, adapted to develop informational indicia and/or to record the same, upon being subjected to an electrical discharge with a ''''burn-off fragrance'''' additive therefor adapted to ameliorate ''''burning'''' and attendant image degradation and to dissipate objectionable odors associated with such recording, especially after a spark discharge thereon; this additive particularly comprising an odoraffecting agent incorporated in a subsurface layer of the medium, and/or comprising fragrance material adapted to vaporize, but preferably not burn, at the temperatures developed during such recording, as well as during associated operations and handling. More particularly, an additive of the aforegoing type comprising fragrance oils, especially the volatile, non-burning, non-tarproducing oils; and more especially ''''candle fragrances'''' or ''''flame fragrance'''' oils of the type known as adapted for candle fragrances which vaporize in the burning of a candle, yet do not wick-up or burn (combust) substantially under normal use; such additives also optionally including other non-perfume substances which are non-combustible in the discharge environment and/or additives especially adapted to promote spark recording.
Inventors
- 👤 Arthur D Diamond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:28
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/20; B41M5/24; B41M5/245; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24942; Y10T428/31
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
93 words
AN IMPROVED SPARK-DICHARGE RECORDING MEDIUM COMPRISING: A BASE SUPPORT; A DARK COLORED CONDUCTIVE LAYER ON SAID SUPPORT, AND A CONTRACTING LIGHT COLORED SURFACE LAYER COMBUSTIBLE AT THE TEMPERATURE DEVELOPED DURING PASSAGE OF MARKING CURRENT THROUGH SAID MEDIUM TO SELECTIVELY REVEAL THE UNDERLYING DARK LAYER WITH ATTENDANT GENERATION OF SMOKE, OBJECTIONABLE ODER AND COMBUSTION DEBRIS, WHEREIN SAID MEDIUM INCLUDES AND EFFECTIVE AMOUNT OF A FRAGRANCE OIL HAVING A FLASH POINT ABOVE SAID TEMPERATURE AND A VAPORIZATION POINT AT SAID TEMPERATURE SO AS TO VAPORIZE WITHOUT BURNING DURING SAID DISCHARGE TO DEVELOP A PLASANT AROMA.
Claim 2
Dependent Claim
93 words
AN IMPROVED SPARK-DICHARGE RECORDING MEDIUM COMPRISING: A BASE SUPPORT; A DARK COLORED CONDUCTIVE LAYER ON SAID SUPPORT, AND A CONTRACTING LIGHT COLORED SURFACE LAYER COMBUSTIBLE AT THE TEMPERATURE DEVELOPED DURING PASSAGE OF MARKING CURRENT THROUGH SAID MEDIUM TO SELECTIVELY REVEAL THE UNDERLYING DARK LAYER WITH ATTENDANT GENERATION OF SMOKE, OBJECTIONABLE ODER AND COMBUSTION DEBRIS, WHEREIN SAID MEDIUM INCLUDES AND EFFECTIVE AMOUNT OF A FRAGRANCE OIL HAVING A FLASH POINT ABOVE SAID TEMPERATURE AND A VAPORIZATION POINT AT SAID TEMPERATURE SO AS TO VAPORIZE WITHOUT BURNING DURING SAID DISCHARGE TO DEVELOP A PLASANT AROMA.
Claim 3
Dependent Claim
36 words
A medium according to claim 1 in which each layer comprises a pigment dispersed in a film-forming resin and said fragrance oil dissolved in a compatible solvent is compounded into at least one of said layers.
Claim 4
Dependent Claim
23 words
A media according to claim 2 in which the solvent is a volatile mineral oil having a flash point from 120*F to 400*F.
Claim 5
Dependent Claim
90 words
A media according to claim 2 further including an intermediate dark layer between said conductive layer and said surface layer comprising a conductive pigment dispersed in a film forming binder having a resistivity intermediate the conductive and surface layers and in which the surface resistivity of the conductive layer is from 100 to 1,000 ohms/cm2, the surface resistivity of the intermediate layer is from 900 to 5,000 ohms/cm2 and the surface resistivity of the surface layer is from 105 to 107 ohms/cm2 and said intermediate layer also includes fragrance oil.
Claim 6
Dependent Claim
15 words
A media according to claim 2 in which the base support has a smooth surface.
Claim 7
Dependent Claim
20 words
A media according to claim 5 in which the base support is a paper sheet having a machine-finish supercalendered surface.
Claim 8
Dependent Claim
17 words
A media according to claim 2 in which the fragrance oil is present in the conductive layer.
Claim 9
Dependent Claim
23 words
A media according to claim 7 in which the conductive layer comprises a conductive carbon black pigment dispersed in an organic resin binder.
Claim 10
Dependent Claim
23 words
A media according to claim 8 in which the surface coat comprises a white inorganic pigment dispersed in a combustible organic film-forming binder.
Claim 11
Dependent Claim
20 words
A media according to claim 7 in which the fragrance oil is a volatile, non-burning, non-tar producing candle fragrance oil.
Claim 12
Dependent Claim
20 words
A media according to claim 10 in which the fragrance oil is selected from floral, fruit and forest perfume oils.
Claim 13
Dependent Claim
17 words
A media according to claim 11 containing from 0.05 to 1.0 weight percent of the fragrance oil.
Claim 14
Dependent Claim
25 words
A media according to claim 12 in which the fragrance oil is present in said layer in a relative amount of 0.5 parts by volume.
Claim 15
Independent Claim
113 words
A METHOD OF REDUCING THE PERSISTENCE AND QUALITY OF ODOR EMANATING FROM SPARK DISCHARGE RECORDING MEDIUM COMPRISING THE STEPS OF: CLEANDERING THE TOP SURFACE OF A PAPRER SUPPORT TO A GLOSSY, MACHINE FINISH TO REDUCE PROJECTION OF COMBUSTIBLE FIBERS INTO THE SUPERIMPOSED LAYER, COATING A FIRST DARK CONDUCTIVE LAYER COMPRISING CONDUCTIVE PIGMENT DISPERSED IN A FILM-FORMING BINDER THEREON, COATING A SECOND LIGHTLY-COLORED SURFACE LAYER COMPRISING WHITE INORGANIC PIGMENT DISPERSED IN FILM-FORMING BINDER THEREO ON THE FIRST LAYER, AND INCORPORATING INTO AT LEAST ONE OF SAID LAYERS 0.01 TO ONE PERCENT BY WEIGHT OF A FRAGRANCE OIL HAVING A FLASH POINT BELOW THE TEMPERATURE DEVELOPED DURING SPARK DISCHARGE RECORDING AND VOLATILE AT SAID TEMPERATURE.
Claim 16
Independent Claim
113 words
A METHOD OF REDUCING THE PERSISTENCE AND QUALITY OF ODOR EMANATING FROM SPARK DISCHARGE RECORDING MEDIUM COMPRISING THE STEPS OF: CLEANDERING THE TOP SURFACE OF A PAPRER SUPPORT TO A GLOSSY, MACHINE FINISH TO REDUCE PROJECTION OF COMBUSTIBLE FIBERS INTO THE SUPERIMPOSED LAYER, COATING A FIRST DARK CONDUCTIVE LAYER COMPRISING CONDUCTIVE PIGMENT DISPERSED IN A FILM-FORMING BINDER THEREON, COATING A SECOND LIGHTLY-COLORED SURFACE LAYER COMPRISING WHITE INORGANIC PIGMENT DISPERSED IN FILM-FORMING BINDER THEREO ON THE FIRST LAYER, AND INCORPORATING INTO AT LEAST ONE OF SAID LAYERS 0.01 TO ONE PERCENT BY WEIGHT OF A FRAGRANCE OIL HAVING A FLASH POINT BELOW THE TEMPERATURE DEVELOPED DURING SPARK DISCHARGE RECORDING AND VOLATILE AT SAID TEMPERATURE.
Claim 17
Dependent Claim
31 words
A method according to claim 14 in which the oil is dissolved in a solvent compatible with the binder resin of the layer and having a flash point below said temperature.
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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) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |