Liquid discharge apparatus, liquid discharge method, and storage medium
US-2021122155-A1 · Apr 29, 2021 · US
Image forming apparatus
US11794494B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11794494-B2 |
| Application number | US-202117513545-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 28, 2021 |
| Priority date | Nov 27, 2020 |
| Publication date | Oct 24, 2023 |
| Grant date | Oct 24, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An image forming apparatus includes a conveyor configured to convey a recording medium based on a prescribed amount of conveyance, an image forming device configured to form an image on the recording medium conveyed by the conveyor, a marker configured to add a plurality of orderly-arrayed marks on the recording medium when the recording medium is conveyed by the conveyor, a detector configured to detect the plurality of orderly-arrayed marks on the recording medium, and circuitry. The circuitry of the image forming apparatus is configured to calculate an amount of movement of the plurality of orderly-arrayed marks detected by the detector, and correct the prescribed amount of conveyance of the recording medium based on the amount of movement.
First claim
Opening claim text (preview).
What is claimed is: 1. An image forming apparatus comprising: a conveyor configured to convey a recording medium based on a prescribed amount of conveyance; an image forming device configured to form an image on the recording medium conveyed by the conveyor; a marker configured to add a plurality of orderly-arrayed marks on the recording medium when the recording medium is conveyed by the conveyor; a detector configured to detect the plurality of orderly-arrayed marks on the recording medium; and circuitry configured to: calculate an amount of movement of the plurality of orderly-arrayed marks detected by the detector, and correct the prescribed amount of conveyance of the recording medium based on the amount of movement; and a roller configured to contact the recording medium and rotate as the recording medium is conveyed by the conveyor, wherein the marker is disposed on the roller. 2. The image forming apparatus according to claim 1 , wherein the marker includes a plurality of protrusions disposed on a curved surface of the roller at equal distances, and is configured to contact the recording medium, and wherein the detector is configured to detect, on the recording medium, the plurality of orderly-arrayed marks formed by the plurality of protrusions. 3. The image forming apparatus according to claim 1 , wherein the marker includes a plurality of protrusions and is configured to contact the recording medium, and wherein the detector is configured to detect, on the recording medium, the plurality of orderly-arrayed marks formed by the plurality of protrusions. 4. The image forming apparatus according to claim 1 , wherein the circuitry is configured to calculate, as the amount of movement of the plurality of orderly-arrayed marks, an amount of movement of the plurality of orderly-arrayed marks in a vertical direction with reference to a pitch of the plurality of orderly-arrayed marks in a lateral direction detected on the recording medium. 5. The image forming apparatus according to claim 1 , wherein the circuitry is configured to calculate an amount of movement of the plurality of orderly-arrayed marks detected on the recording medium in a lateral direction to detect a skew on the recording medium.
Assignees
Inventors
Classifications
- B41J11/007Primary
Conveyor belts or like feeding devices · CPC title
Detecting means for copy material, e.g. for detecting or sensing presence of copy material or its leading or trailing end · CPC title
by marks or formations on the paper being fed · CPC title
Devices for controlling or analysing the entire machine {; Controlling or analysing mechanical parameters involving printing of test patterns} · CPC title
- G03G15/5062Primary
by measuring the characteristics of an image on the copy material · CPC title
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Frequently asked questions
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- What does patent US11794494B2 cover?
- An image forming apparatus includes a conveyor configured to convey a recording medium based on a prescribed amount of conveyance, an image forming device configured to form an image on the recording medium conveyed by the conveyor, a marker configured to add a plurality of orderly-arrayed marks on the recording medium when the recording medium is conveyed by the conveyor, a detector configured…
- Who is the assignee on this patent?
- Takahashi Hiroki, Ricoh Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B41J11/007. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Oct 24 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).