EP0026550A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A case with an information carrier consisting of a tape one side of which has a structure carrying optically readable information, as well as an apparatus for writing, reading or erasing such information
Assignee: BOGEY BV
•
Filing: 1980-09-30
•
Granted: —
•
Expires: 2000-09-30
Abstract
Abstract A dustproof case (20) containing a tape (23) with on one side a structure carrying optically readable information. The tape (23) is accomodated on two reels (21,22). The case (20) is provided with one window (25) through which a part of the tape (23) between the reels (21,22) is visible and with pressing means (24) for urging that part of the tape against the window (25). This pressing means (24) may be a wheel and the window (25) may have the shape of a cylindrical lens.
Inventors
- 👤 Joseph Marie Elise Beaujean
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 07:17
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B7/00; G11B7/002; G11B7/003; G11B7/08; G11B7/085; G11B7/24
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
146 words
A case provided with an information carrier consisting of a tape the one side of which has a structure carrying optically readable information, which case is in the shape of a dust proof housing encasing two reels accommodating said tape, said housing being provided with windows one of which is provided such that a part of the tape present between said two reels is visible through this window, and which case is furthermore provided with means for guiding the tape in such a manner that the part of said tape visible through the said window is kept in an accurately fixed position with respect to this window characterized in that said housing is provided with one window only and that said case is furthermore provided with pressing means positioned opposite to the window urging the part of said tape visible through this window against said window.
Claim 2
Dependent Claim
146 words
A case provided with an information carrier consisting of a tape the one side of which has a structure carrying optically readable information, which case is in the shape of a dust proof housing encasing two reels accommodating said tape, said housing being provided with windows one of which is provided such that a part of the tape present between said two reels is visible through this window, and which case is furthermore provided with means for guiding the tape in such a manner that the part of said tape visible through the said window is kept in an accurately fixed position with respect to this window characterized in that said housing is provided with one window only and that said case is furthermore provided with pressing means positioned opposite to the window urging the part of said tape visible through this window against said window.
Claim 3
Dependent Claim
59 words
The case provided with an information carrier for optically readable information according to claim 1, characterized in that the window is a cylindrical lens the axis of which runs in the direction of the width of the tape and that the length of said lens in the direction of the axis at least equals the width of said tape.
Claim 4
Dependent Claim
45 words
The case provided with an information carrier for optically readable information according to anyone of the preceding claims characterized in that the surface of said pressing means abutting against said tape is of a concave shape in the direction of the width of the tape.
Claim 5
Dependent Claim
42 words
The case provided with an information carrier for optically readable information according to anyone of the preceding claims characterized in that said pressing means is a disc rotatably supported within said case, said disc having an at least mainly cylindrical side wall.
Claim 6
Dependent Claim
45 words
The case provided with an information carrier for optically readable information according to anyone of the preceding claims characterized in that the tape is transparent and that the information carrying structure is present on that side of said tape abutting against said pressing means. for
Claim 7
Dependent Claim
53 words
The case provided with an information carrier optically readable information according to anyone of the preceding claims characterized in that the surface of said pressing means abutting against said tape is reflective and that the information carrying structure is comprised of fields of transparant material having an optical density of more than 1.2.
Claim 8
Dependent Claim
45 words
The case provided with an information carrier for optically readable information according to anyone of the claims 1-5 characterized in that the surface of said pressing means abutting against said tape is reflective and that the information carrying structure comprises fields of a reflective material.
Claim 9
Dependent Claim
42 words
The case provided with an information carrier for optically readable information according to claim 7 characterized in that the thickness of the layer of reflective material on said tape in selected areas is less than that on the remainder of said tape.
Claim 10
Dependent Claim
52 words
The case provided with an information carrier for optically readable information according to anyone of the preceding claims characterized in that the information carrying structure consists entirely or mainly of a material the physical and/or chemical condition of wich may be changed in an optically detectable manner by means of concentrated light.
Claim 11
Dependent Claim
42 words
The case provided with an information carrier for optically readable information.according to claim 9 characterized in that the information carrying structure consists entirely or mainly of a material capable of existing in a crystalline condition as well as in an amorphous condition.
Claim 12
Dependent Claim
51 words
The case provided with an information carrier for optically readable information according to claim 9 characterized in that the information carrying structure consists entirely or mainly of a material capable of existing in a permanently magnetized condition as well as in a non-magnetized condition the reflectivities in these conditions being different.
Claim 13
Dependent Claim
42 words
The case provided with an information carrier for optically readable information according to claim 7 or 8 characterized in that the information carrying structure consists entirely or mainly of a material capable of being evaporated or atomized by means of concentrated light.
Claim 14
Dependent Claim
35 words
The case provided with an information carrier for optically readable information according to claim 12, characterized in that said material is indium, tin or rhodium or an alloy of two or three of these metals.
Claim 15
Dependent Claim
50 words
The case provided with an information carrier for optically readable information according to claim 12 or 13 characterized in that the reflective surface of said pressing means is coated with a layer consisting entirely or mainly of a material capable of being evaporated or atomized by means of concentrated light.
Claim 16
Dependent Claim
36 words
The case provided with an information carrier for optically readable information according to claim 14 characterized in that said material consists of indium, tin or rhodium or an alloy of two or three of these metals.
Claim 17
Dependent Claim
38 words
A case provided with an information carrier for optically readable information according to one or more of the preceding claims characterized in that the exterior dimensions of said case correspond to those of a commercially available tape cassette.
Claim 18
Independent Claim
121 words
An apparatus for writing, reading or erasing information information on a carrier for optically readable present in a case from which the information may be read optically in accordance with anyone of the preceding claims, said apparatus being provided with a cavity for accomodating such a case and with means for fixedly inserting such a case in a predetermined position as well as with at least one light source and with focusing means for focusing the light from said light source characterized in that said focusing means are such that upon the presence of a case provided with a tape-like information carrier these means will focus the light from said light source through the window in said case on said tape.
Claim 19
Dependent Claim
18 words
The apparatus according to claim 17 characterized in that said focusing means include at least cne cylindrical lens.
Claim 20
Dependent Claim
113 words
The apparatus according to claim 17 or 18 for use in combination with a case provided with an information carrier for optically readable according to anyone of claims 12-15 characterized in that in the presence of a case provided with a tape- like information carrier the apparatus is operable at wish to focus light on said tape at an energy density so low that neither the material of said tape nor the material of the reflective layer on said tape is effected thereby or at an energy density that high that the material of the light reflecting layer is evaporated or atomized thereby while not modifying the remaining material of said tape, respectively.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.