EP1002651A2
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EP
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Serial printer and method of adjusting the recording sheet displacement
Assignee: Sharp Corp
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Filing: 1999-11-16
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Granted: —
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Expires: 2019-11-16
Abstract
Abstract In a method of adjusting record displacement of a serial printer including a recording head (8) which records a plurality of lines at a time in the main scanning direction, a first test pattern which is formed of a plurality of line patterns spaced apart by a prescribed distance is recorded in the main scanning direction, the record sheet (S) is fed by a prescribed amount, and a second test pattern which is formed of prescribed recording patterns is recorded. Based on the positional relations between the first and second test patterns, the feeding amount of the record sheet (S) is adjusted. Since the feeding amount of the record sheet (S) is adjusted based on the positional relations between the first and second test patterns, record displacement in the feeding direction of the record sheet (S) can be adjusted easily, and the cost increase of the serial printer can be suppressed.
Inventors
- 👤 Hisashi Yoshimura
- 👤 Hajime Horinaka
- 👤 Yuhi Akagawa
- 👤 Kazuya Koyama
- 👤 Yoshinobu Umetani
- 👤 Norihiro Ochi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 18:04
CPC Classifications
B; B41; B41J; B41J11/00; B41J11/36; B41J11/42; B41J19/00; B41J19/14; B41J19/142
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
98 words
A method of adjusting record displacement of a serial printer
including a recording head (8) recording a plurality of lines at a time in a
main scanning direction, comprising the steps of: recording, in the main scanning direction, a first test pattern formed
of a plurality of line patterns spaced apart by a prescribed distance; feeding a record sheet (S) by a prescribed amount; recording a second test pattern formed of prescribed recording
patterns; and adjusting a feeding amount of said record sheet (S) based on
positional relations between said first test pattern and said second test
pattern.
Claim 2
Dependent Claim
60 words
The method of adjusting record displacement of a serial printer
according to claim 1, wherein said step of recording said second test pattern
includes the step of recording a plurality of line patterns which are
recorded between a plurality of line patterns in said first test pattern and of
which positions in a feeding direction are different from one another.
Claim 3
Dependent Claim
33 words
The method of adjusting record displacement of a serial printer
according to claim 2, wherein said line patterns included in said second test
pattern include at least two line patterns of different shapes.
Claim 4
Dependent Claim
37 words
The method of adjusting record displacement of a serial printer
according to claim 2, wherein said line patterns included in said second test
pattern are each recorded to be offset by one dot in the feeding direction.
Claim 5
Dependent Claim
51 words
The method of adjusting record displacement of a serial printer
according to claim 1, wherein said step of feeding said record sheet (S) by a
prescribed amount includes the step of feeding said record sheet (S) by
changing the feeding amount according to a feeding state of said record
sheet (S).
Claim 6
Dependent Claim
69 words
The method of adjusting record displacement of a serial printer
according to claim 1, wherein said step of recording said second test pattern
includes the step of recording a plurality of line patterns which are
recorded at the same positions in the main scanning direction as the
plurality of line patterns in said first test pattern and of which positions in
the feeding direction are different from one another.
Claim 7
Dependent Claim
33 words
The method of adjusting record displacement of a serial printer
according to claim 6, wherein said line patterns included in said second test
pattern include at least two line patterns of different shapes.
Claim 8
Dependent Claim
37 words
The method of adjusting record displacement of a serial printer
according to claim 6, wherein said line patterns included in said second test
pattern are each recorded to be offset by one dot in the feeding direction.
Claim 9
Independent Claim
92 words
A method of adjusting record displacement of a serial printer
including a recording head (8) recording a plurality of lines at a time in a
main scanning direction, comprising the steps of: recording, in a feeding direction, a first test pattern formed of a
plurality of line patterns spaced apart by a prescribed distance; recording, in the feeding direction, a second test pattern formed of
prescribed recording patterns; and adjusting ink emission timing of said recording head (8) based on
positional relations between said first test pattern and said second test
pattern.
Claim 10
Dependent Claim
57 words
The method of adjusting record displacement of a serial printer
according to claim 9, wherein said step of recording said second test pattern
in the feeding direction includes the step of recording a plurality of line
patterns which are offset by a prescribed amount with respect to the
plurality of line patterns in said fist test pattern.
Claim 11
Dependent Claim
58 words
The method of adjusting record displacement of a serial printer
according to claim 9, wherein said step of adjusting the ink emission timing
of said recording head (8) includes the step of carrying out adjustment by
changing the ink emission timing between cases when the recording head
(8) moves forth and when the recording head (8) moves back.
Claim 12
Dependent Claim
163 words
A serial printer, comprising: a recording head (8) recording a plurality of lines at a time in a main
scanning direction; a first drive unit (15, 17) driving said recording head (8); a second drive unit (16) transporting a record sheet (S); a first control unit (11) controlling said first drive unit (15, 17) to
cause said recording head (8) to record, in the main scanning direction, a
first test pattern formed of a plurality of line patterns spaced apart by a
prescribed distance, controlling said second drive unit (16) to feed said
record sheet (S) by a prescribed amount, and controlling said first drive
unit (15, 17) to cause said recording head (8) to record a second test pattern
formed of prescribed recording patterns; and a second control unit (11) controlling said second drive unit (16) to
transport said record sheet (S) according to a feeding amount determined
based on positional relations between said first test pattern and said second
test pattern.
Claim 13
Dependent Claim
45 words
The serial printer according to claim 12, wherein said second
test pattern includes a plurality of line patterns which are recorded
between the plurality of line patterns in said first test pattern and of which
positions in the feeding direction are different from one another.
Claim 14
Dependent Claim
54 words
The serial printer according to claim 12, wherein said second
test pattern includes a plurality of line patterns which are recorded at the
same positions in the main scanning direction as the plurality of line
patterns in said first test pattern and of which positions in the feeding
direction are different from one another.
Claim 15
Dependent Claim
152 words
A serial printer, comprising: a recording head (8) recording a plurality of lines at a time in a main
scanning direction; a first drive unit (15, 17) driving said recording head (8); a second drive unit (16) transporting a record sheet (S); a first control unit (11) controlling said first drive unit (15, 17) and
said second drive unit (16) to cause said recording head (8) to record, in a
feeding direction, a first test pattern formed of a plurality of line patterns
spaced apart by a prescribed distance and to cause said recording head (8)
to record, in the feeding direction, a second test pattern formed of
prescribed recording patterns; and a second control unit (11) controlling said first drive unit (15, 17) to
carry out recording on said record sheet (S) at ink emission timing
determined based on positional relations between said first test pattern and
said second test pattern.
Claim 16
Dependent Claim
38 words
The serial printer according to claim 15, wherein said second
test pattern includes a plurality of line patterns which are offset by a
prescribed amount with respect to the plurality of line patterns in said first
test pattern.
Claim 17
Independent Claim
123 words
A method of adjusting the operation of a serial printer having a
recording head for recording a plurality of lines at a time on a print surface in each
scan in a main scanning direction, the method comprising the steps: recording a first test pattern on said surface in a first scan of the recording
head in said main scanning direction; effecting relative displacement of said recording head and surface in a sub-scanning
direction transverse to said main scanning direction; recording a second test pattern on said surface in a second scan of the
recording head in said main scanning direction; and adjusting an operating parameter of the printer in accordance with the
relative print positions of the first and second test patterns.
Claim 18
Dependent Claim
150 words
A method according to claim 17 wherein the first test pattern
comprises a first set of marks extending and aligned in the main scanning
direction, and the second test pattern comprises a second set of marks
extending in the main scanning direction and incrementally spaced in the sub-scanning
direction, the operation being such that the position in said sub-scanning
direction of the first set of aligned marks lies within the region,
extending in said sub-scanning direction, over which the second set of marks
extends, said operating parameter being the amount of the relative
displacement between the recording head and the print surface in the sub-scanning
direction occurring between successive scans of the recording head,
and the adjustment of said operating parameter being effected in accordance
with the positional relationship between said position of the first set of aligned
marks and said region over which the second set of marks extends.
Claim 19
Dependent Claim
167 words
A method according to claim 17 wherein the first test pattern
comprises a first set of regularly spaced marks formed by a first part of the
recording head, the first set extending in the main scanning direction, and the
second test pattern comprises a second set of regularly spaced marks formed
by a second part of the recording head which in a normal image-recording
mode forms a different image component, such as a different colour
component, from a component formed by the first part of the recording head,
the spacing of said second set of marks being different from the spacing of the
first set of marks, the second set also extending in the main scanning
direction, said operating parameter being the relative timing of image
component recording by said first and second parts of the recording head, and
the adjustment of said operating parameter being effected in accordance with
the different positional relationships between marks of the first set and
associated marks of the second set.
References Cited (Backward Citations)
JPH0885242A
Cited
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