Patent EP0440438A2 successfully refreshed from Google Patents.
EP0440438A2
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Serial recording apparatus for bidirectional recording
Assignee: Canon Inc
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Filing: 1991-01-30
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Granted: —
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Expires: 2011-01-30
Abstract
Abstract A serial recording apparatus for reciprocating a recording head (H) with respect to a recording medium (18) to perform bidirectional recording includes a position detector (HP) for detecting a reference position of the recording head (H), a driving unit for reciprocating the recording head within a predetermined area including the reference position, a calculating unit for calculating a difference between reference positions detected by the position detector by reciprocal movement when the recording head is reciprocated by the driving unit within the predetermined area, and a correcting unit for correcting a positional error in bidirectional recording on the basis of the difference calculated by the calculating unit.
Inventors
- 👤 Junichi C/O Canon Kabushiki Kaisha Arakawa
- 👤 Kazuyuki C/O Canon Kabushiki Kaisha Masumoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 20:44
CPC Classifications
B; B41; B41J; B41J19/00; B41J19/14; B41J19/142; B41J19/145
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
99 words
A serial recording apparatus for reciprocating a recording head with respect to a recording medium to perform bidirectional recording, comprising: position detecting means for detecting a reference position of said recording head; driving means for reciprocating said recording head within a predetermined area including the reference position; means for calculating a difference between reference positions detected by said position detecting means by reciprocal movement when said recording head is reciprocated by said driving means within the predetermined area; and means for correcting a positional error in bidirectional recording on the basis of the difference calculated by said calculating means.
Claim 2
Dependent Claim
33 words
An apparatus according to claim 1, wherein said correcting means corrects a positional error on the basis of a difference calculated by said calculating means and a characteristic value of said driving means.
Claim 3
Dependent Claim
29 words
An apparatus according to claim 1, wherein said correcting means corrects a positional error while said recording head is moved for recording in one direction or the other direction.
Claim 4
Dependent Claim
25 words
An apparatus according to claim 1, wherein said correcting means corrects the positional error during movement of said recording head for recording in both directions.
Claim 5
Dependent Claim
36 words
An apparatus according to claim 1, wherein said driving means includes a pulse motor, and said calculating means calculates the difference between the detected reference positions by the number of pulses for driving said pulse motor.
Claim 6
Dependent Claim
43 words
An apparatus according to claim 1, wherein said driving means includes a pulse motor, and said calculating means calculates the difference between the detected reference positions in accordance with a plurality of phases obtained by dividing the pulse for driving said pulse motor.
Claim 7
Dependent Claim
34 words
An apparatus according to claim 1, wherein said driving means drives to reciprocate said recording head to cause said calculating means to calculate the difference between the detected reference positions upon a power-on operation.
Claim 8
Dependent Claim
34 words
An apparatus according to claim 1, wherein said driving means drives to reciprocate said recording head to cause said calculating means to calculate the difference between the detected reference positions in an on-line mode.
Claim 9
Dependent Claim
23 words
An apparatus according to claim 1, wherein said calculating means calculates the differences between the detected reference positions at a plurality of speeds.
Claim 10
Dependent Claim
16 words
An apparatus according to claim 1, wherein the predetermined area is about 1/3 the recording area.
Claim 11
Dependent Claim
23 words
An apparatus according to claim 1, wherein said recording head is an ink-jet recording head for ejecting an ink droplet to perform recording.
Claim 12
Dependent Claim
30 words
An apparatus according to claim 1, wherein said recording head is a bubble-jet recording head for ejecting an ink droplet to perform recording upon growth and shrinkage of a bubble.
Claim 13
Dependent Claim
67 words
An apparatus according to claim 1, wherein said recording head comprises a plurality of ejection ports for ejecting an ink, and heat energy generating means, respectively arranged in correspondence with said plurality of ejection ports, for causing a change in state in the ink by heat and ejecting the ink from said ejection ports to form flying liquid droplets on the basis of the change in state.
Claim 14
Dependent Claim
19 words
An apparatus according to claim 1, wherein said recording head is interchangeable with respect to said serial recording apparatus.
Claim 15
Dependent Claim
23 words
An apparatus according to claim 14, wherein said recording head is an ink-jet recording head for ejecting an ink droplet to perform recording.
Claim 16
Dependent Claim
17 words
An apparatus according to claim 15, wherein said recording head comprises a tank for storing an ink.
Claim 17
Dependent Claim
74 words
A serial recording method of reciprocating a recording head with respect to a recording medium to perform bidirectional recording, comprising the steps of: reciprocating said recording head within a predetermined area including a reference position prior to recording; detecting the reference positions in both movement directions during reciprocal movement and calculating a difference between the detected reference positions; and correcting a positional error to perform bidirectional recording on the basis of the calculated difference.
Claim 18
Dependent Claim
34 words
A method according to claim 17, wherein the step of performing bidirectional recording comprises the step of correcting the positional error while said recording head performs recording in one direction or the other direction.
Claim 19
Dependent Claim
30 words
A method according to claim 17, wherein the step of performing bidirectional recording comprises the step of correcting the positional error during recording of said recording head in both directions.
Claim 20
Dependent Claim
16 words
An apparatus according to claim 17, wherein the predetermined area is about 1/3 the recording area.
Claim 21
Dependent Claim
23 words
An apparatus according to claim 17, wherein said recording head is an ink-jet recording head for ejecting an ink droplet to perform recording.
Claim 22
Dependent Claim
30 words
An apparatus according to claim 17, wherein said recording head is a bubble-jet recording head for ejecting an ink droplet to perform recording upon growth and shrinkage of a bubble.
Claim 23
Dependent Claim
67 words
An apparatus according to claim 17, wherein said recording head comprises a plurality of ejection ports for ejecting an ink, and heat energy generating means, respectively arranged in correspondence with said plurality of ejection ports, for causing a change in state in the ink by heat and ejecting the ink from said ejection ports to form flying liquid droplets on the basis of the change in state.
Claim 24
Dependent Claim
19 words
An apparatus according to claim 17, wherein said recording head is interchangeable with respect to said serial recording apparatus.
Claim 25
Dependent Claim
23 words
An apparatus according to claim 24, wherein said recording head is an ink-jet recording head for ejecting an ink droplet to perform recording.
Claim 26
Dependent Claim
17 words
An apparatus according to claim 25, wherein said recording head comprises a tank for storing an ink.
Claim 27
Dependent Claim
65 words
A serial recording apparatus for reciprocating a recording head with respect to a recording medium to perform by directional recording characterised in that there are means for calibrating the recording head in response to variations in load on the recording head and means responsive to the calibration in order to correct any positional errors of the bidirectional recording head caused by variations in the load.
References Cited (Backward Citations)
No citation records indexed.
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