Patent US4415911A successfully refreshed from Google Patents.
US4415911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording apparatus
Assignee: Canon Inc
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Filing: 1982-07-29
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Granted: 1983-11-15
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Expires: 2002-07-29
Abstract
Abstract When reversing the advancing direction of a carriage having a printing head, speed control for the carriage is forbidden to enable high-speed recording and smooth movement of the carriage.
Inventors
- 👤 Shigemitsu Tazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:46
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/18; B41J19/20; B41J19/30; B41J19/305; H; H02; H02P; H02P7/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
146 words
A high speed recording apparatus comprising: linear motor means; a carriage driven reciprocally by said linear motor means and having a printing head thereon; a graduation plate connected to said linear motor means and positioned along the reciprocal movement path of said carriage; a graduation detecting means provided on said carriage for generating signals indicative of the position and advancing speed of said carriage along said graduation plate; and control means for controlling the movement of said carriage, which control means includes means for sensing the position and the advancing speed of said carriage from the signals generated by said graduation detecting means, means for regulating the advancing speed in accordance with the sensing means when said carriage is advanced in a predetermined direction, and means for disabling the regulating means when the advancement of said carriage is in a direction other than the predetermined direction.
Claim 2
Dependent Claim
146 words
A high speed recording apparatus comprising: linear motor means; a carriage driven reciprocally by said linear motor means and having a printing head thereon; a graduation plate connected to said linear motor means and positioned along the reciprocal movement path of said carriage; a graduation detecting means provided on said carriage for generating signals indicative of the position and advancing speed of said carriage along said graduation plate; and control means for controlling the movement of said carriage, which control means includes means for sensing the position and the advancing speed of said carriage from the signals generated by said graduation detecting means, means for regulating the advancing speed in accordance with the sensing means when said carriage is advanced in a predetermined direction, and means for disabling the regulating means when the advancement of said carriage is in a direction other than the predetermined direction.
Claim 3
Dependent Claim
14 words
Recording apparatus according to claim 1, wherein said printing head comprises ink jet nozzles.
Claim 4
Dependent Claim
15 words
Recording apparatus according to claim 1, wherein said linear motor means comprises a permanent magnet.
Claim 5
Dependent Claim
65 words
A linear motor control system for a high speed recording apparatus comprising: linear motor means; a carriage moved by said linear motor means; control means for controlling the linear motor means, thereby regulating the advancing speed of said carriage in a predetermined direction; and means for disabling said control means when the movement of said carriage is in a direction other than the predetermined direction.
Claim 6
Dependent Claim
65 words
A linear motor control system for a high speed recording apparatus comprising: linear motor means; a carriage moved by said linear motor means; control means for controlling the linear motor means, thereby regulating the advancing speed of said carriage in a predetermined direction; and means for disabling said control means when the movement of said carriage is in a direction other than the predetermined direction.
Claim 7
Dependent Claim
28 words
A linear motor control system according to claim 4, wherein said linear motor means comprises a permanent magnet and a moving coil which is mounted on said carriage.
Claim 8
Dependent Claim
34 words
A linear motor control system according to claim 4, wherein said carriage is provided with a printing head and is switched in an advancing direction according to the length of data to be printed.
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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |