US4387384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording device
Assignee: Ricoh Co Ltd
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Filing: 1980-11-12
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Granted: 1983-06-07
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Expires: 2000-11-12
Abstract
Abstract Characters, numerals and other symbols are formed with dots placed on a recording paper by a printing stylus thrust through a thin ink film formed in front of the recording paper.
Inventors
- 👤 Takaji Sue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:27
CPC Classifications
B; B41; B41J; B41J27/00; B41J27/16; B41J27/18; B41J2/00; B41J2/22; B41J2/23
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
170 words
A recording device for utilizing liquid ink in the impact printing of characters, comprising: a reservoir adapted to receive a liquid ink; means for maintaining a desired level of ink in said reservoir; an open generally U-shaped vertically oriented ring depending from the bottom of said reservoir, with the opening of said ring being in communication with the ink within said reservoir, said ring being dimensioned to form a thin film of liquid ink therein and to retain said film by surface tension effects, in such a manner that ink constantly flows from said reservoir through said ring via said film and drips from the bottom of said ring; means for disposing a record medium adjacent said ring and in juxtaposition with said thin ink film; and a printing stylus adjacent said ring and adapted to be thrust through said thin ink film and against said record medium, to transport a part of said thin ink film to said record medium in accordance with a desired character to be printed.
Claim 2
Dependent Claim
170 words
A recording device for utilizing liquid ink in the impact printing of characters, comprising: a reservoir adapted to receive a liquid ink; means for maintaining a desired level of ink in said reservoir; an open generally U-shaped vertically oriented ring depending from the bottom of said reservoir, with the opening of said ring being in communication with the ink within said reservoir, said ring being dimensioned to form a thin film of liquid ink therein and to retain said film by surface tension effects, in such a manner that ink constantly flows from said reservoir through said ring via said film and drips from the bottom of said ring; means for disposing a record medium adjacent said ring and in juxtaposition with said thin ink film; and a printing stylus adjacent said ring and adapted to be thrust through said thin ink film and against said record medium, to transport a part of said thin ink film to said record medium in accordance with a desired character to be printed.
Claim 3
Dependent Claim
23 words
The device according to claim 1, further comprising means for returning to said reservoir ink which drips from the bottom of said ring.
Claim 4
Dependent Claim
26 words
The device according to claim 1 or 2, further comprising means for detecting whether or not ink is being supplied from said reservoir to said ring.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |