Patent US977260A successfully refreshed from Google Patents.
Patent EP0500281A2 successfully refreshed from Google Patents.
EP0500281A2
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EP
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Recording apparatus with automatic recovery function
Assignee: Canon Inc
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Filing: 1992-02-14
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Granted: —
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Expires: 2012-02-14
Abstract
Abstract There is disclosed a recording apparatus which records a calibration pattern with the recording head, at a predetermined interval on a margin of the continuous recording medium, and reads the printed pattern with a sensor. The read pattern is utilized for identifying whether unevenness in density or discharge failure is present in the recording head, and a discharge restoring operation is conducted with a capping member, based on the result of identification. Automatic correction of image defects can thus be achieved.
Inventors
- 👤 Akira c/o Canon Kabushiki Kaisha Haramatsu
- 👤 Kiyoharu C/O Canon Kabushiki Kaisha Tanaka
- 👤 Yasuyuki C/O Canon Kabushiki Kaisha Takanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:26
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2132; B41J2/2139; B41J2/135; B41J2/165; B41J2/16579; B41J2/2146; B41J29/00; B41J29/38; B41J29/393; B41J3/00; B41J3/44; B41J2/16517; B41J2/16552
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
89 words
A recording apparatus for recording an image by scanning motion of a recording head relative to a recording medium, comprising: pattern recording means for recording a predetermined pattern with said recording head at regular time intervals; reader means for reading the predetermined pattern recorded by said pattern recording means; discrimination means for discriminating the recording state of said recording head, based on the predetermined pattern read by said reader means; and control means for controlling said recording head in accordance with a result of discrimination by said discrimination means.
Claim 2
Dependent Claim
89 words
A recording apparatus for recording an image by scanning motion of a recording head relative to a recording medium, comprising: pattern recording means for recording a predetermined pattern with said recording head at regular time intervals; reader means for reading the predetermined pattern recorded by said pattern recording means; discrimination means for discriminating the recording state of said recording head, based on the predetermined pattern read by said reader means; and control means for controlling said recording head in accordance with a result of discrimination by said discrimination means.
Claim 3
Dependent Claim
27 words
A recording apparatus according to claim 1, wherein said pattern recording means is adapted to record said predetermined pattern in an end portion of said recording medium.
Claim 4
Dependent Claim
27 words
A recording apparatus according to claim 1, wherein said pattern recording means is adapted to record said predetermined pattern on a medium different from said recording medium.
Claim 5
Dependent Claim
54 words
A recording apparatus according to claim 1, wherein said reader means includes illumination means for illuminating the recorded predetermined pattern, projection means for projecting said predetermined pattern illuminated by said illumination means, and a photoelectric converting device for converting the optical image of said predetermined pattern, projected by said projection means, into electrical signals.
Claim 6
Dependent Claim
32 words
A recording apparatus according to claim 4, wherein the effective number of elements in said photoelectric converting device is equal to or larger than that of recording elements of said recording head.
Claim 7
Dependent Claim
22 words
A recording apparatus according to claim 1, wherein said recording medium is formed as a continuous web sufficiently long in one direction.
Claim 8
Dependent Claim
33 words
A recording apparatus according to claim 1, wherein said control means is adapted to correct drive signals supplied to said recording head, in accordance with the result of discrimination by said discrimination means.
Claim 9
Dependent Claim
20 words
A recording apparatus according to claim 1, wherein said recording head is adapted to discharge ink from a discharge opening.
Claim 10
Dependent Claim
36 words
A recording apparatus according to claim 8, wherein said control means is adapted to effect a process for restoring ink discharge of said recording head, in accordance with the result of discrimination by said discrimination means.
Claim 11
Dependent Claim
48 words
A recording apparatus according to claim 8, wherein said recording head includes thermal energy generating means, provided at said discharge opening, for causing a thermal state change in the ink, thereby discharging the ink from said discharge opening by said state change and forming a flying liquid droplet.
Claim 12
Dependent Claim
61 words
A recording apparatus according to claim 1, further comprising an auxiliary recording head capable of scanning motion relative to said recording medium, independently of said recording head, wherein said control means is adapted to switch the image recording onto said recording medium from said recording head to said auxiliary recording head, based on the result of discrimination by said discrimination means.
Claim 13
Dependent Claim
18 words
A recording apparatus according to claim 1, wherein said recording head is capable of recording with plural colors.
Claim 14
Dependent Claim
14 words
A recording apparatus according to claim 1, wherein said recording medium is woven cloth.
Claim 15
Dependent Claim
77 words
A recording method for recording an image by scanning motion of a recording head relative to a recording medium, comprising steps of: recording a predetermined pattern with said recording head at regular time intervals; reading thus recorded predetermined pattern; discriminating whether the recording state of said recording head is normal, based on thus read predetermined pattern; and effecting a process for restoring the ink discharge of said recording head, when said recording state is discriminated as abnormal.
Claim 16
Dependent Claim
77 words
A recording method for recording an image by scanning motion of a recording head relative to a recording medium, comprising steps of: recording a predetermined pattern with said recording head at regular time intervals; reading thus recorded predetermined pattern; discriminating whether the recording state of said recording head is normal, based on thus read predetermined pattern; and effecting a process for restoring the ink discharge of said recording head, when said recording state is discriminated as abnormal.
Claim 17
Dependent Claim
20 words
A recording method according to claim 14, further comprising: a step for repeating said steps of recording, reading and discrimination.
Claim 18
Dependent Claim
27 words
A recording method according to claim 15, further comprising, after said repeating step, a step for providing an alarm when said recording state is discriminated as abnormal.
Claim 19
Dependent Claim
60 words
A recording method according to claim 15, further comprising steps of: preparing an auxiliary recording head capable of scanning motion relative to said recording medium, independently of said recording head; and switching the image recording onto said recording medium from said recording head to said auxiliary recording head, when the recording state is discriminated as abnormal after said repeating step.
Claim 20
Dependent Claim
22 words
A recording method according to claim 14, wherein said recording medium is formed as a continuous web sufficiently long in one direction.
Claim 21
Dependent Claim
20 words
A recording method according to claim 14, wherein said recording head is adapted to discharge ink from a discharge opening.
Claim 22
Dependent Claim
35 words
A recording method according to claim 19, wherein said control means is adapted to effect a process for restoring ink discharge of said recording head, according to the result of discrimination by said discrimination means.
Claim 23
Dependent Claim
18 words
A recording method according to claim 14, wherein said recording head is capable of recording with plural colors.
Claim 24
Dependent Claim
14 words
A recording method according to claim 14, wherein said recording medium is woven cloth.
Claim 25
Dependent Claim
54 words
Ink jet printing apparatus including an ink jet head, characterised by regenerating means for regenerating the inkjet head to maintain print quality, means for printing a predetermined pattern on a medium, examination means for examining said pattern to determine print quality, and means for activating the regeneration means in response to said examination means.
Claim 26
Dependent Claim
54 words
Ink jet printing apparatus including an ink jet head, characterised by regenerating means for regenerating the inkjet head to maintain print quality, means for printing a predetermined pattern on a medium, examination means for examining said pattern to determine print quality, and means for activating the regeneration means in response to said examination means.
References Cited (Backward Citations)
No citation records indexed.
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