US4545483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing for a magnetic tape cassette
Assignee: TDK Corp
•
Filing: 1983-04-06
•
Granted: 1985-10-08
•
Expires: 2003-04-06
Abstract
Abstract The disclosure described a casing for a magnetic tape cassette having a transparent window which is formed by laminating a bonding layer of a plastic sheet of the same material as a casing body and a reinforcing layer of a plastic sheet of the different material from the bonding layer.
Inventors
- 👤 Haruo Shiba
- 👤 Shigetomo Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:32
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/023; G11B23/0233; B; B29; B29C; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/50; B29C66/51; B29C66/53; B29C66/532; B29C66/61; B29C66/70; B29C66/72; B29C66/723; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C65/00; B29C65/02; B29C65/08; B29C66/71; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2025/00; B29K2995/00; B29K2995/0018; B29K2995/0026; B29L; B29L2009/00; B29L2031/00; B29L2031/712; B29L2031/7162; Y; Y10; Y10S; Y10S220/00; Y10S220/31
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
75 words
A casing for a magnetic tape cassette made of a plastic material having a transparent window on at least one surface of the casing body characterized in that said transparent window is formed by laminating a bonding layer, to be bonded to said casing body, of a plastic sheet made of the same material as said casing body and a reinforcing layer of a plastic sheet made of the different material from said bonding layer.
Claim 2
Dependent Claim
75 words
A casing for a magnetic tape cassette made of a plastic material having a transparent window on at least one surface of the casing body characterized in that said transparent window is formed by laminating a bonding layer, to be bonded to said casing body, of a plastic sheet made of the same material as said casing body and a reinforcing layer of a plastic sheet made of the different material from said bonding layer.
Claim 3
Dependent Claim
51 words
A casing for a magnetic tape cassette according to claim 1 wherein said transparent window has a three layer structure formed by laminating a plastic sheet of the same material as said bonding layer on the surface opposite the surface of the reinforcing layer to which said bonding layer is bonded.
Claim 4
Dependent Claim
30 words
A casing for a magnetic tape cassette according to claim 1 wherein said transparent window is bonded to said casing body by an ultrasonic bonding or a heat bonding method.
Claim 5
Dependent Claim
32 words
A casing for a magnetic tape cassette according to claim 1 wherein said casing body and said bonding layer are respectively made of polypropylene and said reinforcing layer is made of polystyrene.
Claim 6
Dependent Claim
29 words
A casing for a magnetic tape cassette according to claim 1 wherein the outer surface of said transparent window is lower than the outer surface of said casing body.
Claim 7
Dependent Claim
41 words
A casing for a magnetic tape cassette according to claim 1 wherein the inner surface constituting a window part of said transparent window is recessed to be lower than the inner surface of the peripheral part of said reinforcing plastic sheet.
Claim 8
Dependent Claim
30 words
A casing for a magnetic tape cassette according to claim 2 wherein said transparent window is bonded to said casing body by an ultrasonic bonding or a heat bonding method.
Claim 9
Dependent Claim
32 words
A casing for a magnetic tape cassette according to claim 2 wherein said casing body and said bonding layer are respectively made of polypropylene and said reinforcing layer is made of polystyrene.
Claim 10
Dependent Claim
29 words
A casing for a magnetic tape cassette according to claim 2 wherein the outer surface of said transparent window is lower than the outer surface of said casing body.
Claim 11
Dependent Claim
41 words
A casing for a magnetic tape cassette according to claim 2 wherein the inner surface constituting a window part of said transparent window is recessed to be lower than the inner surface of the peripheral part of said reinforcing plastic sheet.
References Cited (Backward Citations)
US2457998A
Cited
US2597227A
Cited
US3297398A
Cited
US3432380A
Cited
US3459625A
Cited
US3532412A
Cited
US3591069A
Cited
US3587837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |