US 2022/0197192 A1Published application

Image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorsMasato Kobayashi, Wataru Kato

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Abstract

An image forming apparatus that includes an image bearing member which can bear a toner image, a transfer member used to transfer a toner image onto a recording material from the image bearing member, and a reading device which reads density information of images on recording material disposed on the platen. The image forming apparatus forms a first chart on a first recording material and a second chart on a second recording material by sequentially transferring a plurality of test images while applying a plurality of test voltages to the transfer member. The two charts are read by the reading device and the transfer voltage is adjusted based on the reading result.

Claims17

Dependent claims

An image forming apparatus comprising:

an image bearing member configured to bear a toner image;
a transfer member configured to transfer a toner image onto a recording material from the image bearing member;
an application unit configured to apply a voltage to the transfer member;
a discharge unit configured to discharge a recording material including an image formed by fixing a toner image transferred by the transfer member;
a platen on which a recording material is disposed when an image on the recording material is to be read;
a reading device configured to read density information of an image on a recording material disposed on the platen;
and
a control unit configured to execute an adjustment mode for adjusting a transfer voltage to be applied to the transfer member by the application unit in a transfer process, by discharging, from the discharge unit, a first recording material including a first chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit, and a second recording material including a second chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit,
wherein the control unit is configured to adjust the transfer voltage based on a reading result obtained by the reading device reading the first recording material and the second recording material disposed together on the platen.

6 more elements

An image forming apparatus comprising:

an image bearing member configured to bear a toner image;
a transfer member configured to transfer a toner image onto a recording material from the image bearing member;
an application unit configured to apply a voltage to the transfer member;
a discharge unit configured to discharge a recording material including an image formed by fixing a toner image transferred by the transfer member;
a reading device configured to read density information of an image on a recording material;
and
a control unit configured to execute an adjustment mode for adjusting a transfer voltage to be applied to the transfer member by the application unit in a transfer process, by discharging, from the discharge unit, a first recording material including a first chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit, and a second recording material including a second chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit,
wherein first identification information for identifying an orientation of the first chart is formed on a surface on which the first chart is formed, and second identification information for identifying an orientation of the second chart is formed on a surface on which the second chart is formed, and
wherein the control unit is configured to adjust the transfer voltage based on a reading result of density information of the test images on the first chart and the second chart that is obtained by the reading device, and a reading result of the first identification information and the second identification information that is obtained by the reading device.

6 more elements

An image forming apparatus comprising:

an image bearing member configured to bear a toner image;
a transfer member configured to transfer a toner image onto a recording material from the image bearing member;
an application unit configured to apply a voltage to the transfer member;
a discharge unit configured to discharge a recording material including an image formed by fixing a toner image transferred by the transfer member;
a reading device configured to read density information of an image on a recording material;
and
a control unit configured to execute an adjustment mode for adjusting a transfer voltage to be applied to the transfer member by the application unit in a transfer process, by discharging, from the discharge unit, a first recording material including a first chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit, and a second recording material including a second chart formed by sequentially transferring a plurality of test images by applying a plurality of test voltages to the transfer member by the application unit,
wherein first identification information for identifying a page of the first chart is formed on a surface on which the first chart is formed, and second identification information for identifying a page of the second chart is formed on a surface on which the second chart is formed, and
wherein the control unit is configured to adjust the transfer voltage based on a reading result of density information of the test images on the first chart and the second chart that is obtained by the reading device, and a reading result of the first identification information and the second identification information that is obtained by the reading device.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/545,898Filed 8 Dec 2021
Priority: JP 2020-21084718 Dec 2020
Published: 23 Jun 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

G03G 15/1665
Of a toner pattern, e.g. a powder pattern , e.g. magnetic transfer: by introducing the second base in the nip formed by the recording member and…
G03G 15/0189
Using more than one reusable electrographic recording member, e.g. one for every monocolour image: primary transfer to an intermediate transfer belt
G03G 15/0266
For laying down a uniform charge, e.g. for sensitising; Corona discharge devices: arrangements for controlling the amount of charge
G03G 15/1605
Of a toner pattern, e.g. a powder pattern , e.g. magnetic transfer: using at least one intermediate support

Family

US 11,681,247 B2Related patent
US 2022/0197192 A1This patent

From the US filing history. Foreign family members aren’t listed.

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