US3975563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image transfer sheet material
Assignee: 3M Co
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Filing: 1974-05-08
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Granted: 1976-08-17
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Expires: 1994-05-08
Abstract
Abstract Sheet materials are provided which are useful in preparing negative transparencies for use with overhead projectors. Methods for obtaining image transfer and preparation of transparencies are also provided.
Inventors
- 👤 Victor R. Franer
- 👤 Darrell C. Burman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:54
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/40; B41M5/48; Y; Y10; Y10S; Y10S428/00; Y10S428/914; Y10S428/918; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31801; Y10T428/31855
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
144 words
Sheet material useful in image transfer techniques comprising: a. a thin, flexible backing which is transparent to infrared radiation; b. a continuous, heat-fusible, visually opaque first layer coated over one major surface of said backing, said first layer having a softening point in the range of about 60°C. to 310°C., said first layer having an optical density between 0.2 and 0.7 in the infrared wavelength range, and said first layer being at a coating weight in the range of about 0.4 to 1.3 grams per square foot; and c. a continuous, non-tacky, heat-fusible, infrared-transparent second layer coated over said first layer, said second layer having a softening point at least as high as said first layer, said second layer being at a coating weight in the range of about 0.1 to 0.7 grams per square foot, and said second layer having a matte surface.
Claim 2
Dependent Claim
144 words
Sheet material useful in image transfer techniques comprising: a. a thin, flexible backing which is transparent to infrared radiation; b. a continuous, heat-fusible, visually opaque first layer coated over one major surface of said backing, said first layer having a softening point in the range of about 60°C. to 310°C., said first layer having an optical density between 0.2 and 0.7 in the infrared wavelength range, and said first layer being at a coating weight in the range of about 0.4 to 1.3 grams per square foot; and c. a continuous, non-tacky, heat-fusible, infrared-transparent second layer coated over said first layer, said second layer having a softening point at least as high as said first layer, said second layer being at a coating weight in the range of about 0.1 to 0.7 grams per square foot, and said second layer having a matte surface.
Claim 3
Dependent Claim
20 words
Sheet material in accordance with claim 1, wherein said first layer comprises polyamide resin, wax, and an admixture of pigments.
Claim 4
Dependent Claim
17 words
Sheet material in accordance with claim 2, wherein said second layer comprises vinyl resins and a wax.
Claim 5
Dependent Claim
16 words
Sheet material in accordance with claim 1, wherein said flexible backing comprises a transparent plastic film.
Claim 6
Dependent Claim
35 words
Sheet material in accordance with claim 1, wherein said second layer comprises particles of wax dispersed throughout a continuous phase of resin, said particles being in the size range of about 2.0 to 10 microns.
Claim 7
Dependent Claim
35 words
Sheet material in accordance with claim 5, wherein said first layer comprises particles of wax dispersed throughout a continuous phase of resin, said particles being in the size range of about 0.5 to 2.5 microns.
Claim 8
Dependent Claim
128 words
Sheet material useful in image transfer techniques comprising: a. a thin, flexible backing which is transparent to infrared radiation; b. a continuous, heat-fusible, infrared-transparent, visually-transparent first layer coated over one major surface of said backing, said first layer having a softening point in the range of about 60°C. to 310°C., and said first layer being at a coating weight in the range of about 0.4 to 1.3 grams per square foot; and c. a continuous, non-tacky, heat-fusible, infrared-transparent second layer coated over said first layer, said second layer having a softening point at least as high as said first layer, said second layer being at a coating weight in the range of about 0.1 to 0.9 grams per square foot, and said second layer having a matte surface.
Claim 9
Dependent Claim
128 words
Sheet material useful in image transfer techniques comprising: a. a thin, flexible backing which is transparent to infrared radiation; b. a continuous, heat-fusible, infrared-transparent, visually-transparent first layer coated over one major surface of said backing, said first layer having a softening point in the range of about 60°C. to 310°C., and said first layer being at a coating weight in the range of about 0.4 to 1.3 grams per square foot; and c. a continuous, non-tacky, heat-fusible, infrared-transparent second layer coated over said first layer, said second layer having a softening point at least as high as said first layer, said second layer being at a coating weight in the range of about 0.1 to 0.9 grams per square foot, and said second layer having a matte surface.
Claim 10
Dependent Claim
15 words
Sheet material in accordance with claim 7, wherein said backing comprises a transparent plastic film.
Claim 11
Dependent Claim
17 words
Sheet material in accordance with claim 7, wherein said first layer comprises polyamide resin and a wax.
Claim 12
Dependent Claim
34 words
Sheet material in accordance with claim 7, wherein said second layer comprises particles of wax dispersed throughout a continuous phase of resin, said particles being in the range of about 2.0 to 10 microns.
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) | 1979-08-17 | 1980-02-16 | 1980-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-17 | 1984-02-16 | 1984-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-17 | 1988-02-16 | 1988-08-17 | $7700.00 | Window Closed / Lapsed |