Patent US4678979A successfully refreshed from Google Patents.
US4678979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the carriage of a printer
Assignee: Brother Industries Ltd
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Filing: 1986-07-03
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Granted: 1987-07-07
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Expires: 2006-07-03
Abstract
Abstract An apparatus for controlling the carriage of a printer equipped with a stepping motor for reciprocating the carriage with a printing head comprising a power source circuit, a drive circuit for driving the stepping motor and a controller, in combination with a voltage detector for detecting voltage supplied from the power source circuit and a delay controller for delaying the driving time of the stepping motor at each end of the reciprocating motion of the carriage according to the voltage detected by the detector in order to prevent the stepping motor from excessive temperature rise.
Inventors
- 👤 Masaaki Hori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:04
CPC Classifications
H; H02; H02P; H02P8/00; H02P8/36; B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J19/202
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
An apparatus for controlling the carriage of a printer with a stepping motor, for reciprocating the carriage having a printing head mounted thereon, comprising a power source circuit, a drive circuit for driving said stepping motor with electric power supplied from said power source circuit, and a controller which controls said drive circuit; wherein said controller is provided with voltage detecting means for detecting the magnitude of the voltage supplied from said power source circuit, and delay control means for delaying the initiating of the drive of said stepping motor at each end of the reciprocating motion of said carriage according to said magnitude of detected voltage supplied from said voltage detecting means.
Claim 2
Independent Claim
113 words
An apparatus for controlling the carriage of a printer with a stepping motor, for reciprocating the carriage having a printing head mounted thereon, comprising a power source circuit, a drive circuit for driving said stepping motor with electric power supplied from said power source circuit, and a controller which controls said drive circuit; wherein said controller is provided with voltage detecting means for detecting the magnitude of the voltage supplied from said power source circuit, and delay control means for delaying the initiating of the drive of said stepping motor at each end of the reciprocating motion of said carriage according to said magnitude of detected voltage supplied from said voltage detecting means.
Claim 3
Dependent Claim
44 words
The apparatus for controlling the carriage of a printer of claim 1, wherein said controller further comprises an A/D converter for receiving and converting the driving voltage supplied to said drive circuit and for outputting the converted digital signals to said voltage detecting means.
Claim 4
Dependent Claim
43 words
The apparatus for controlling the carriage of a printer of claim 2, wherein said controller further comprises a memory for containing a memory map which defines a relation between said A/D converted voltage signals and a delay time of said delay control means.
References Cited (Backward Citations)
US3941230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-07-06 | 1991-01-05 | 1991-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-06 | 1995-01-05 | 1995-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-06 | 1999-01-05 | 1999-07-07 | $7700.00 | Window Closed / Lapsed |