US4830525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Typewriter with pivoting keyboard
Assignee: Silver Seiko Ltd
•
Filing: 1988-02-18
•
Granted: 1989-05-16
•
Expires: 2008-02-18
Abstract
Abstract A typewriter which has a minimized dimension in the direction of the depth and requires a minimized overall installation area. The typewriter includes a keyboard mounted at a portion near a top, front side of the typewriter housing and is pivotable from and to a horizontal position. When pivoted in a normally closed position, it lies substantially in a plane of a top opening formed in the typewriter housing. The keyboard is located such that its rear end is positioned very close to a platen mounted at a rear portion of the typewriter housing and covers the area of movement of a ribbon cassette carried on a carrier that is mounted to the typewriter housing and moves parallel to the platen.
Inventors
- 👤 Yoshimitsu Nagashima
- 👤 Yojiro Fukui
- 👤 Yoshimi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:07
CPC Classifications
B; B41; B41J; B41J3/00; B41J3/36; B41J3/37; B41J29/00; B41J29/02; B41J5/00; B41J5/08; B41J5/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
237 words
A typewriter having minimal depth dimensions for printing characters on paper comprising: a substantially rectangular housing having a substantially rectangular opening located on a top side of said housing and extending from a rear side toward a front side of said housing and from a left side to a right side of said housing; a platen mounted at a rear part of said rectangular opening that is parallel to and in close proximity to said rear side of said housing for carrying and feeding said paper; a carrier mounted in said rectangular housing capable of moving parallel to said platen and adapted to carry a removable ribbon cassette; means attached to said carrier and disposed between said carrier and said platen for printing characters on paper disposed in said platen; a substantially rectangular keyboard disposed in a front part of said rectangular opening, said keyboard pivotable around an axis extending near and substantially in parallel to one of said sides of said rectangular opening from a normally closed positions to an open position so that when in said normally closed position said keyboard is located substantially in a plane containing said top side of said housing and an area of movement of said removable ribbon cassette is disposed below said keyboard; and means for supporting a lower face of said keyboard when said keyboard is located substantially in said plane containing said top side of said housing.
Claim 2
Dependent Claim
237 words
A typewriter having minimal depth dimensions for printing characters on paper comprising: a substantially rectangular housing having a substantially rectangular opening located on a top side of said housing and extending from a rear side toward a front side of said housing and from a left side to a right side of said housing; a platen mounted at a rear part of said rectangular opening that is parallel to and in close proximity to said rear side of said housing for carrying and feeding said paper; a carrier mounted in said rectangular housing capable of moving parallel to said platen and adapted to carry a removable ribbon cassette; means attached to said carrier and disposed between said carrier and said platen for printing characters on paper disposed in said platen; a substantially rectangular keyboard disposed in a front part of said rectangular opening, said keyboard pivotable around an axis extending near and substantially in parallel to one of said sides of said rectangular opening from a normally closed positions to an open position so that when in said normally closed position said keyboard is located substantially in a plane containing said top side of said housing and an area of movement of said removable ribbon cassette is disposed below said keyboard; and means for supporting a lower face of said keyboard when said keyboard is located substantially in said plane containing said top side of said housing.
Claim 3
Dependent Claim
33 words
A typewriter as claimed in claim 1, wherein said axis of pivotal motion of said keyboard extends near and substantially in parallel to a front side of said rectangular opening of said housing.
Claim 4
Dependent Claim
36 words
A typewriter as claimed in claim 1, wherein said axis of pivotal motion of said keyboard extends near and substantially in parallel to a left side or right side of said rectangular opening of said housing.
Claim 5
Dependent Claim
27 words
A typewriter as claimed in claim 1, wherein a rear end of said keyboard has a scale plate that covers a rear portion of said ribbon cassette.
Claim 6
Dependent Claim
42 words
A typewriter as claimed in claim 1, wherein a rear side of said keyboard, when in said normally closed position, is spaced from said platen to define therebetween a gap through which paper fed by said platen is discharged from said typewriter.
References Cited (Backward Citations)
US3990565A
Cited
JPS5766988A
Cited
JPS58166088A
Cited
US4509873A
Cited
JPS6094377A
Cited
GB2177246A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |