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US4079499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for manufacturing tape recorder cassettes and cassette obtained thereby
Assignee: Individual
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Filing: 1975-06-13
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Granted: 1978-03-21
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Expires: 1995-06-13
Abstract
Abstract The invention relates to a method for manufacturing tape cassettes and to the cassettes obtained thereby. The cassettes are made of metallic material which undergoes a series of blanking and drawing operations to obtain two mutually connectable shells, with engagement means for their assembly and an insert element for guiding the tape to be arranged in the front portion of the cassette between the two shells to be connected.
Inventors
- 👤 Ottaviano Clerici Bagozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:47
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08757; G11B23/08785; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/49876; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A method for manufacturing a tape recorder cassette comprising two shells facing each other for guiding the tape, the method including the steps of cold forming said shells by cutting out from a sheet metal a first and a second piece each having dimensions slightly larger than those of a corresponding one of said cassette shells, drawing said pieces to form side walls of said shells and to shape the major surfaces of said shells extending orthogonally to said side walls, blanking openings in said major surfaces and said side walls, at positions adapted to receive respectively a tape winding and unwinding hub, drive spindle, pressure roller and a magnetic head of a tape machine having a recording and/or playback head, shaping mutual conjugate engagement means for said shells in said side walls, and cold forming an insert element of sheet metal providing thereon guide surfaces for the tape, arranging said insert element between said shells near the front portions thereof and assembling said shells facing each other.
Claim 2
Independent Claim
168 words
A method for manufacturing a tape recorder cassette comprising two shells facing each other for guiding the tape, the method including the steps of cold forming said shells by cutting out from a sheet metal a first and a second piece each having dimensions slightly larger than those of a corresponding one of said cassette shells, drawing said pieces to form side walls of said shells and to shape the major surfaces of said shells extending orthogonally to said side walls, blanking openings in said major surfaces and said side walls, at positions adapted to receive respectively a tape winding and unwinding hub, drive spindle, pressure roller and a magnetic head of a tape machine having a recording and/or playback head, shaping mutual conjugate engagement means for said shells in said side walls, and cold forming an insert element of sheet metal providing thereon guide surfaces for the tape, arranging said insert element between said shells near the front portions thereof and assembling said shells facing each other.
Claim 3
Dependent Claim
77 words
A method as claimed in claim 1, wherein the sheet metal piece corresponding to one of said shells is blanked to obtain a rectangular piece having portions at the four sides projecting beyond the height of said side walls, said portions being recessed by an extent substantially equivalent to the thickness of said side walls, said portions being drawn to provide seats for removably receiving corresponding projections in the side walls of the other of said shells.
Claim 4
Dependent Claim
38 words
A method as claimed in claim 1, further including the step of machining end portions in said insert element having cross dimensions and thickness allowing resilient displacement of said end portions under the action of a tensioned tape.
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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |