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US5021272A
Expired / Lapsed
US
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Overhead projector sheet for printing by thermal transfer printing and method of printing the same
Assignee: Taiho Kogyo Co Ltd
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Filing: 1988-08-25
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Granted: 1991-06-04
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Expires: 2008-08-25
Abstract
Abstract A method for thermal transfer printing on an OHP sheet, comprising the steps of laying a backing sheet on a surface of said OHP sheet opposite a printing surface thereof, and conducting printing the printing surface of said OHP sheet by the use of a thermal transfer printer.
Inventors
- 👤 Hidemasa Mohri
- 👤 Michiaki Tobita
- 👤 Masahiko Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:55
CPC Classifications
B; B41; B41M; B41M5/00; B41M5/26; B41M5/382; B41M5/38207; B41J; B41J2/00; B41J2/315; B41J2/32; B41J2/325; Y; Y10; Y10T; Y10T428/00; Y10T428/14; Y10T428/1419; Y10T428/24; Y10T428/24777
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
58 words
An overhead projection sheet for printing by thermal transfer printing comprising an overhead projection sheet of a transparent film, a backing sheet overlaid on a surface of said overhead projection sheet opposite a printing surface thereof and bonding means for detachably attaching a respective one end of said overlaid sheet to one end of said overhead projection sheet.
Claim 2
Dependent Claim
58 words
An overhead projection sheet for printing by thermal transfer printing comprising an overhead projection sheet of a transparent film, a backing sheet overlaid on a surface of said overhead projection sheet opposite a printing surface thereof and bonding means for detachably attaching a respective one end of said overlaid sheet to one end of said overhead projection sheet.
Claim 3
Dependent Claim
16 words
An overhead projection sheet according to claim 1, wherein said bonding means is a bonding agent.
Claim 4
Dependent Claim
16 words
An overhead projection sheet according to claim 1, wherein said bonding means is a double-faced tape.
Claim 5
Dependent Claim
25 words
An overhead projection sheet according to claim 1, wherein said overhead projection sheet is a polyethylene terephthalate film, a polycarbonate film or a polyacetate film.
Claim 6
Dependent Claim
17 words
An overhead projection sheet according to claim 1, wherein said backing sheet is a sheet of paper.
Claim 7
Dependent Claim
16 words
An overhead projection sheet according to claim 1, wherein said backing sheet is a synthetic sheet.
Claim 8
Dependent Claim
16 words
An overhead projection sheet according to claim 1, wherein said backing sheet is a plastic sheet.
Claim 9
Dependent Claim
34 words
An overhead projection sheet according to claim 4, wherein said polyethylene terephthalate film, said polycarbonate film or said polyacetate film is provided with a coating layer for improving the printability of its printing surface.
Claim 10
Dependent Claim
44 words
An overhead projection sheet according to claim 8, wherein said coating layer includes a rubber based adhesive layer, an acryl based adhesive layer, a polyester based adhesive layer or a layer including a solid wax having a good compatibility with a thermal fusible ink.
Claim 11
Dependent Claim
45 words
An overhead projection sheet according to claim 5, wherein said sheet of paper is coat paper, semi-pure paper, pure paper, laminated paper, glassine paper, oil proof paper, napkin paper, machine glazed paper, clay art paper, casein art paper, kraft paper, simili paper, or Indian paper.
Claim 12
Dependent Claim
18 words
An overhead projection sheet according to claim 6, wherein said synthetic sheet is made by a film process.
Claim 13
Dependent Claim
40 words
An overhead projection sheet according to claim 7, wherein said plastic sheet is constituted of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, fluororesin, polycarbonate, cellulose acetate, polyester, polyamide, polyimide, polyphenyleneoxide, polysulfone, poly-4-methylpentane-1, polyparaxylene, rubber hydrochloride, polyurethane or ionomer.
Claim 14
Dependent Claim
46 words
An overhead projection sheet according to claim 3, wherein said double-faced tape has a strongly adhesive side and a weakly adhesive side, the strongly adhesive side being in contact with the backing sheet and the weakly adhesive side being in contact with the overhead projection sheet.
References Cited (Backward Citations)
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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) | 1994-06-03 | 1994-12-03 | 1995-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-03 | 1998-12-03 | 1999-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-03 | 2002-12-03 | 2003-06-04 | $7700.00 | Window Closed / Lapsed |