An inkjet printer is configured to acquire gap variation information related to a variation of a gap between a specific portion of an ink discharging surface and a recording sheet as a function of an inkjet head position, the specific portion located within a usage nozzle disposed area where usage nozzle rows to be actually used are disposed, determine representative gap variation information related to a variation, as a function of the inkjet head position, of a representative gap representing actual gaps between the usage nozzle rows and the recording sheet, by multiplying the gap variation information by a correction coefficient dependent on a width of the usage nozzle disposed area in a head moving direction and a wavelength of a wave shape of the recording sheet, and determine ink discharging timing based on the representative gap variation information, assuming that the actual gaps are equal to the representative gap.

Claims

6 · 1 independent · depth 5

6 granted claims

›1.independentAn inkjet printer comprising:nan inkjet head configured to discharge ink from a plurality of nozzles formed in an ink discharging surface thereof, the…+5

›2.↳ 1The inkjet printer according to claim 1, further comprising:na gap variation acquiring device configured to acquire gap variation information related …d2+4

›3.↳ 2The inkjet printer according to claim 2,nwherein the specific portion is located in a central position of the usage nozzle disposed area in the second…d3+2

›6.↳ 2The inkjet printer according to claim 2,nwherein the plurality of nozzle rows comprise:nblack nozzle rows configured to discharge black ink; andcolor …d3

Classifications

5 codes

IPC · International Patent Classification

Section B — Performing operations; transporting

B41J25/00
B41J25/308

USPC · US Patent Classification

347/8347/101347/104

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

⤢ drag to zoom

USPTOApplicanthover for detail · click to open

Pendency

0.6 y

228 days filing → grant

Office actions

none on record

Examiner

Thinh Nguyen

art unit 2853 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 24 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20140210883 A1	31 Jul 2014

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.