Record receiver having plural interactive leaves or a colorless – Having plural interactive leaves
Patent
1988-06-17
1990-03-20
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having plural interactive leaves
8471, 428 40, 428195, 428913, 428914, B41M 5035, B41M 526
Patent
active
049101889
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to dye receiving sheets (image receiving sheets) to be used for image formation according to the heat-sensitive recording method, and more particularly to a dye receiving sheet for preparation of a transparency which can be used in a projection device such as an overhead projector (OHP) or slide projector.
BACKGROUND ART
Heretofore, heat-sensitive recording means, which combine a heat transfer sheet and a dye receiving sheet and apply a desired printing on said dye receiving sheet with a thermal head have been known. Among this kind of dye receiving sheets, there exists a dye receiving sheet to be used primarily for a projection device, etc., comprising a transparent substrate and a transparent receiving layer provided on said substrate which receives the dye which has migrated from the heat transfer sheet, during heating.
However, the above dye receiving sheet is still inadequate in running performance within the heat-sensitive recording device, and also there are involved the drawbacks of low image density at the printed recording and also poor sensitivity even when heat transfer is carried out. Further, in the dye receiving sheet of the prior art, when a detection mark for control of running in the heat-sensitive recording is provided, this mark will remain even after image formation and therefore cause inconveniences when it is used for a projection device.
DISCLOSURE OF THE INVENTION
The present invention has been achieved in view of the above points, and it is intended to provide a dye receiving sheet for preparation of a transparency, which affords improvement of running performance within the heat-sensitive recording device, image density and sensitivity during printing, and also makes possible free addition of detection marks, etc.
The dye receiving sheet for preparation of a transparency according to the present invention is a sheet to be used in combination with a heat transfer sheet having a dye layer formed thereon and comprises (a) a transparent substrate, (b) a transparent receiving layer provided on the transparent substrate for receiving the dye migrating from the heat transfer sheet corresponding to the applied energy from a thermal head and (c) an optically detectable layer provided on at least a part of the sheet .
BRIEF DESCRIPTION OF THE DRAWINGS
In the accompanying drawings:
FIG. 1 through FIG. 3, FIG. 7 and FIG. 8 are each sectional views of the dye receiving sheet for preparation of a transparency according to the present invention;
FIG. 4 is a plan view showing the pattern of the plane shape half cut;
FIG. 5 is a plan view showing the pattern when a tackifier layer is provided;
FIG. 6 is a plan view showing the embodiment when an optically detectable layer is partially provided on the sheet; and
FIG. 9 is a sectional view showing how heat-sensitive transfer, is effected by use of the dye receiving sheet of the present invention.
BEST MODES FOR CARRYING OUT THE INVENTION
FIG. 1 shows an example of the present invention, and the dye receiving sheet 1 for preparation of a transparency (e.g., a transmissive original) of the present invention is basically composed of a transparent substrate 2, a transparent receiving layer 3 provided on said substrate 2 and an optically detectable layer 5 provided freely peelably through a tackifier layer 4 on the surface of the above substrate opposite to the side where the transparent receiving layer 3 is provided.
In the case of this example, the optically detectable layer 5 is formed on the entire surface of the transparent substrate 2, and said optically detectable layer 5 also functions as a support sheet for supporting the transparent substrate 2 and the transparent receiving layer 3.
Also, in the present invention, the above optically detectable layer 5 may be provided partially within the sheet.
FIG. 2 and FIG. 3 are sectional views in the case where the optically detectable layer is partially provided within the sheet, and each of the cases in FIG. 2 and FIG. 3 shows an example when an optic
REFERENCES:
patent: 4720480 (1988-01-01), Ito et al.
Akada Masanori
Arita Hitoshi
Egashira Noritaka
Ito Yoshikazu
Iwata Tamami
Dai Nippon Insatsu Kabushiki Kaisha
Hess Bruce H.
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