US3881587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling the movement of the printing head in printers
Assignee: Koparu KK
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Filing: 1973-10-29
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Granted: 1975-05-06
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Expires: 1993-10-29
Abstract
Abstract A device for controlling the movement of the printing head in printers comprising an operating lever pivotably mounted on the printing head and a cam plate arranged along the path for movement of the printing head and having cam portions engageable with said operating lever in order to move the printing head so that the printing head is pushed against the platen only in the printing stroke, and arranged to simplify the construction and to facilitate designing and machining works of component parts.
Inventors
- 👤 Katsuhiko Okabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
261 words
A device for controlling the movement of a printing head comprising: a printing head having a printing portion thereon and movable along a recording surface of a recording paper faced to said printing portion and also rotatable about an axis extending parallel to said recording surface between a first position with said printing portion contacting said recording surface and a second position with said printing portion removed from said recording surface, an operating lever pivotably mounted on and engageable with said printing head, a cam plate extending in parallel with said recording surface to engage said operating lever, a first spring connected to said printing head and urging said printing head to said second position, a second spring connected between said printing head and said operating lever and urging said operating lever to engage said printing head, said cam plate having a slope portion at one end thereof engageable with said operating lever for moving said printing head against the bias of said first spring from second position to said first position, a low portion at the other end thereof engageable with said operating lever for allowing said first spring to urge said printing head to said second position from said first position, and a high portion between said slope and low portions for maintaining said printing head in said first position when said printing head is moved along said recording surface in one direction in order to carry out printing and for maintaining said printing head in said second position when said printing head is moved in the opposition direction.
Claim 2
Independent Claim
261 words
A device for controlling the movement of a printing head comprising: a printing head having a printing portion thereon and movable along a recording surface of a recording paper faced to said printing portion and also rotatable about an axis extending parallel to said recording surface between a first position with said printing portion contacting said recording surface and a second position with said printing portion removed from said recording surface, an operating lever pivotably mounted on and engageable with said printing head, a cam plate extending in parallel with said recording surface to engage said operating lever, a first spring connected to said printing head and urging said printing head to said second position, a second spring connected between said printing head and said operating lever and urging said operating lever to engage said printing head, said cam plate having a slope portion at one end thereof engageable with said operating lever for moving said printing head against the bias of said first spring from second position to said first position, a low portion at the other end thereof engageable with said operating lever for allowing said first spring to urge said printing head to said second position from said first position, and a high portion between said slope and low portions for maintaining said printing head in said first position when said printing head is moved along said recording surface in one direction in order to carry out printing and for maintaining said printing head in said second position when said printing head is moved in the opposition direction.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |