Patent US4318937A successfully refreshed from Google Patents.
US4318937A
Expired / Lapsed
US
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Heat and solvent sensitive recording material and process to use it
Assignee: Rhone Poulenc Systemes SA
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Filing: 1980-10-10
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Granted: 1982-03-09
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Expires: 2000-10-10
Abstract
Abstract An opaque recording material has an opaque sensitive layer which can be transparentized by application of heat or a suitable solvent for the opacifying styrene resin pigment which is dispersed in a polyvinylidene chloride film-forming resin binder. In a particular application, useful for overhead transparencies or for making photographic negatives for reproduction, heat and solvent are both applied to the opaque layer in selected different areas to transparentize the opaque layer. The opaque layer may be deposited on a transparent clear or colored support such as transparent polyester.
Inventors
- 👤 Claude Ceintrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:09
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/36; B41M5/366; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/162; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
48 words
An opaque recording material for making transparencies for projection of information or for making photographic negatives for reproduction, said recording material comprising a transparent support coated with an opaque layer obtained from a mixture of an organic styrene resin pigment emulsion and a polyvinylidene chloride film-forming resin binder.
Claim 2
Dependent Claim
48 words
An opaque recording material for making transparencies for projection of information or for making photographic negatives for reproduction, said recording material comprising a transparent support coated with an opaque layer obtained from a mixture of an organic styrene resin pigment emulsion and a polyvinylidene chloride film-forming resin binder.
Claim 3
Dependent Claim
28 words
The opaque recording material according to claim 1 wherein the weight ratio of styrene resin pigment to film-forming resin binder is in the range of 1:1 to 9:1.
Claim 4
Dependent Claim
31 words
The opaque recording material according to claim 1 or 2 wherein the styrene resin pigment has an average particle diameter size range of from about 0.2 micron to about 1.0 micron.
Claim 5
Dependent Claim
50 words
The opaque recording material according to claim 1 or 2 in which the styrene resin pigment is selected from the group consisting of polystyrene homopolymers and styrene copolymers containing at least 70% by weight of styrene units and up to 30% by weight of another vinyl monomer copolymerizable with styrene.
Claim 6
Dependent Claim
48 words
The opaque recording material according to claim 3 in which the styrene resin pigment is selected from the group consisting of polystyrene homopolymers and styrene copolymers containing at least 70% by weight of styrene units and up to 30% by weight of another vinyl monomer copolymerizable with styrene.
Claim 7
Dependent Claim
31 words
The opaque recording material according to claim 1 or 2 which further comprises from 5% to 15% by weight of a plasticizer, based on the weight of the styrene resin pigment.
Claim 8
Dependent Claim
29 words
The opaque recording material according to claim 4 which further comprises from 5% to 15% by weight of a plasticizer, based on the weight of the styrene resin pigment.
Claim 9
Dependent Claim
31 words
The opaque recording material according to claim 6 wherein said plasticizer is at least one member selected from the group consisting of esters of phthalic acid and esters of adipic acid.
Claim 10
Dependent Claim
31 words
The opaque recording material according to claim 7 wherein said plasticizer is at least one member selected from the group consisting of esters of phthalic acid and esters of adipic acid.
Claim 11
Dependent Claim
22 words
The opaque recording material according to claim 8 wherein said plasticizer is selected from the group consisting of dibutylphthalate, diethylhexylphthalate and diethylhexyladipate.
Claim 12
Dependent Claim
22 words
The opaque recording material according to claim 9 wherein said plasticizer is selected from the group consisting of dibutylphthalate, diethylhexylphthalate and diethylhexyladipate.
Claim 13
Dependent Claim
16 words
The opaque recording material according to claim 1 in which the support is a polyester film.
Claim 14
Dependent Claim
46 words
A process for making transparencies for projection of information or for making photographic negatives for reproductions which comprises applying heat to the opaque recording material of claim 1, the amount of heat being sufficient to raise the temperature of the opaque layer above its transparentizing temperature.
Claim 15
Dependent Claim
30 words
The process according to claim 13 wherein the opaque layer further comprises from 5% to 15% by weight of a plasticizer, based on the weight of the styrene resin pigment.
Claim 16
Dependent Claim
101 words
A process for making transparencies for recording of information which can be used for projection or reproduction by transparentizing portions of an opaque recording medium by application of heat and transparentizing other portions of the opaque recording medium by application of writing liquid, said process comprising applying heat and writing liquid in selectively different areas to the surface of the opaque layer of the opaque recording material of claim 1, said writing liquid comprising a solvent for the styrene resin pigment and the amount of heat being sufficient to raise the temperature of the opaque layer to above its transparentizing temperature.
Claim 17
Dependent Claim
115 words
The process of claim 15 wherein the step of applying heat is carried out prior to the step of applying writing liquid, which comprises placing an original having infrared absorbing zones thereon in contact with the opaque recording material, exposing the original to irradiation with infrared rays to heat the infrared absorbing zones of the original allowing the temperature of the portions of the opaque layer of the opaque recording material, which are in contact with the infrared absorbing zones of the original to increase to at least its transparentizing temperature, separating the original and opaque recording material, and applying said writing liquid to selected areas of the remaining opaque zones of the opaque layer.
Claim 18
Dependent Claim
65 words
The opaque recording material according to claims 1 or 2 wherein the opaque layer has a degree of opacity of at least 60% and said transparencies which are formed by applying a solvent for the styrene resin pigment to the opaque layer or by raising the temperature of the opaque layer to above its transparentizing temperature have a degree of transparency of at least 90%.
Claim 19
Dependent Claim
63 words
The opaque recording material according to claim 3 wherein the opaque layer has a degree of opacity of at least 60% and said transparencies which are formed by applying a solvent for the styrene resin pigment to the opaque layer or by raising the temperature of the opaque layer to above its transparentizing temperature have a degree of transparency of at least 90%.
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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |