EP0421806A2
Expired / Lapsed
EP
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An image forming apparatus
Assignee: Canon Inc
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Filing: 1990-10-04
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Granted: —
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Expires: 2010-10-04
Abstract
Abstract An image recording apparatus includes a recording unit integrally having an image forming recording head and a memory for storing a correction datum for correcting non-uniform image formation property; a reader for reading the correction datum from the memory; and a device for changing image forming conditions in accordance with the correction datum read by the reader.
Inventors
- 👤 Yutaka Udagawa
- 👤 Yoshiaki Takayanagi
- 👤 Katsuyoshi Maeshima
- 👤 Yasuhiro Numata
- 👤 Takayuki Matsuo
- 👤 Miyuki Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 00:39
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175; B41J2/17503; B41J2/17543; B41J2/17546; B41J25/00; B41J25/34; G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; B41J2202/00; B41J2202/01; B41J2202/17; G06K2215/00; G06K2215/0082; G06K2215/0094
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
57 words
An image recording apparatus, comprising: a recording unit integrally having an image forming recording head and memory means for storing a correction datum for correcting non-uniform image formation property; reading means for reading the correction datum from said memory; and means for changing image forming conditions in accordance with the correction datum read by said reading means.
Claim 2
Dependent Claim
57 words
An image recording apparatus, comprising: a recording unit integrally having an image forming recording head and memory means for storing a correction datum for correcting non-uniform image formation property; reading means for reading the correction datum from said memory; and means for changing image forming conditions in accordance with the correction datum read by said reading means.
Claim 3
Dependent Claim
53 words
2 . An image recording apparatus usable with a unit which is detachably mountable thereto, comprising: mounting means for mounting said unit; means for reading the correction datum from the memory of said unit mounted thereon, the memory storing a correction datum for correcting non-uniformity of an image formation property of said unit.
Claim 4
Dependent Claim
53 words
2 . An image recording apparatus usable with a unit which is detachably mountable thereto, comprising: mounting means for mounting said unit; means for reading the correction datum from the memory of said unit mounted thereon, the memory storing a correction datum for correcting non-uniformity of an image formation property of said unit.
Claim 5
Dependent Claim
27 words
A recording head unit, comprising: image forming recording head; memory means for storing a correction datum for correcting non-uniformity of image formation property of said recording head.
Claim 6
Dependent Claim
27 words
A recording head unit, comprising: image forming recording head; memory means for storing a correction datum for correcting non-uniformity of image formation property of said recording head.
Claim 7
Dependent Claim
47 words
An image recording apparatus, comprising: mounting means for mounting thereon a recording unit; means for reading a correction datum from a memory of said recording unit; means for correcting a signal for printing with coloring material contained in said recording unit in accordance with the correction datum.
Claim 8
Dependent Claim
47 words
An image recording apparatus, comprising: mounting means for mounting thereon a recording unit; means for reading a correction datum from a memory of said recording unit; means for correcting a signal for printing with coloring material contained in said recording unit in accordance with the correction datum.
Claim 9
Dependent Claim
37 words
A recording head unit, comprising: means for supporting a coloring material; a plurality of recording elements for depositing the coloring material; and memory means for storing a correction datum for correcting non-uniformity of said plural recording elements.
Claim 10
Dependent Claim
37 words
A recording head unit, comprising: means for supporting a coloring material; a plurality of recording elements for depositing the coloring material; and memory means for storing a correction datum for correcting non-uniformity of said plural recording elements.
Claim 11
Dependent Claim
45 words
An image forming apparatus, comprising: a receptor for receiving a recording head having integrally a memory means storing a number peculiar to the recording head; and a contact for reading the number from the memory means of the recording head unit mounted on said receptor.
Claim 12
Dependent Claim
45 words
An image forming apparatus, comprising: a receptor for receiving a recording head having integrally a memory means storing a number peculiar to the recording head; and a contact for reading the number from the memory means of the recording head unit mounted on said receptor.
Claim 13
Dependent Claim
35 words
A recording head detachably mountable on an image recording apparatus, comprising: memory means storing a number peculiar to said recording head; a contact for reading out a content from said memory by said recording means.
Claim 14
Dependent Claim
35 words
A recording head detachably mountable on an image recording apparatus, comprising: memory means storing a number peculiar to said recording head; a contact for reading out a content from said memory by said recording means.
Claim 15
Independent Claim
28 words
An apparatus according to claims 1 or 2 or 3 or 7, wherein said recording unit is detachably mountable on a main assembly of said image recording apparatus.
Claim 16
Independent Claim
25 words
An apparatus according to claims 1 or 2 or 3 or 4 or 6 or 7, wherein said recording head ejects ink for the recording.
Claim 17
Independent Claim
17 words
An apparatus according to any one of claims 1 to 7, wherein said memory means includes ROM.
Claim 18
Independent Claim
20 words
An apparatus according to any one of claims 1 to 7, wherein said recording unit ejects ink using thermal energy.
Claim 19
Independent Claim
20 words
An apparatus according to claims 1 or 2 or 4, further comprising means for generating image data to be recorded.
Claim 20
Independent Claim
20 words
An apparatus according to claims 1 or 2 or 4, wherein said image data generating means includes an image scanner.
Claim 21
Independent Claim
24 words
An apparatus according to claims 1 or 2 or 4, further comprising means for changing image forming condition in accordance with the correction datum.
Claim 22
Independent Claim
24 words
An apparatus according to claims 1 or 2 or 4, wherein said changing means corrects the image data in accordance with the correction datum.
Claim 23
Independent Claim
21 words
An apparatus according to claims 3 or 11, wherein said recording unit ejects ink by film boiling provided by thermal energy.
Claim 24
Dependent Claim
24 words
A recording head unit according to claims 3 or 5 or 7, further comprising a contact for supplying the correction datum to said unit.
Claim 25
Dependent Claim
26 words
A recording head unit according to claims 3 or 5 or 7, further comprising means for supplying electric power to said recording head to drive it.
Claim 26
Dependent Claim
19 words
An apparatus according to claim 4, wherein said leading means includes means for transmitting address datum to said memory.
Claim 27
Dependent Claim
17 words
A recording head unit according to claim 5, wherein said plural recording elements eject the colouring material.
Claim 28
Dependent Claim
25 words
An apparatus according to claim 6, further comprising means for discriminating change of said recording head unit by detecting the number from the memory means.
Claim 29
Dependent Claim
24 words
An apparatus according to claim 21, further comprising means for changing operation of said apparatus in accordance with an output of said detecting means.
Claim 30
Dependent Claim
39 words
An apparatus according to claim 6, wherein said memory stores a datum peculiar to said recording head, and said changing means reads out the datum stored in the memory means in accordance with an output of said discriminating means.
Claim 31
Dependent Claim
23 words
An apparatus according to claim 23, wherein the datum peculiar to the recording head unit indicates image density property of the recording unit.
Claim 32
Dependent Claim
18 words
An image recording apparatus including means for compensating printing non-uniformity of the recording head thereof following exchange thereof.
Claim 33
Dependent Claim
18 words
An image recording apparatus including means for compensating printing non-uniformity of the recording head thereof following exchange thereof.
Claim 34
Dependent Claim
16 words
A recording head for image recording apparatus including means for compensating printing non-uniformity thereof after installation.
Claim 35
Dependent Claim
16 words
A recording head for image recording apparatus including means for compensating printing non-uniformity thereof after installation.
Claim 36
Dependent Claim
29 words
An image printer including means for correcting image density non-uniformity, said means being setable in a test print operation, including means for preventing erroneous correcting by the correcting means.
Claim 37
Dependent Claim
29 words
An image printer including means for correcting image density non-uniformity, said means being setable in a test print operation, including means for preventing erroneous correcting by the correcting means.
Claim 38
Independent Claim
31 words
A method of printing including a step of correcting image density non-uniformity, using a test print, including a step of preventing erroneous correction due to erroneous placing of the test print.
Claim 39
Independent Claim
31 words
A method of printing including a step of correcting image density non-uniformity, using a test print, including a step of preventing erroneous correction due to erroneous placing of the test print.
References Cited (Backward Citations)
EP0315417A2
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EP0317268A2
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