US 2026/0064046 A1Published application

Image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorsMASAKI SHIMOMURA, HIROYUKI SEKI, NOBUTOSHI SUGAI

Life of this patent

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Abstract

An image forming apparatus includes a moving portion to perform a moving operation in which a transfer member is moved between a contact position where the transfer member contacts an image bearing member and a separated position where the transfer member is separated from the image bearing member. A detector detects a voltage applied to the transfer member and/or a current flowing through the transfer member when the voltage is applied to the transfer member. A discriminator discriminates whether a position of the transfer member is in the contact position or the separated position based on a result of comparison between a detecting result of the detecting portion and a reference value. The discriminator resets the reference value in a case in which the detecting result is not below the reference value while the moving operation of the moving portion is performed.

Claims11

Dependent claims

An image forming apparatus comprising:

an image bearing member configured to bear a toner image;
a transfer member configured to form a transfer portion which transfers the toner image from the image bearing member to a transfer material in contact with the image bearing member;
a moving portion configured to perform a moving operation in which the transfer member is moved between a contact position where the transfer member contacts the image bearing member and a separated position where the transfer member is separated from the image bearing member;
a driving portion configured to drive the moving portion;
an applying portion configured to apply a voltage to the transfer member;
a detecting portion configured to detect at least one of a voltage applied to the transfer member by the applying portion and a current flowing through the transfer member when the voltage is applied to the transfer member by the applying portion;
and
a discriminating means configured to reset the reference value in a case in which the detecting result of the detecting portion is not below the reference value while the moving operation of the moving portion is performed.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/310,487Filed 26 Aug 2025
Priority: JP 2024-14651928 Aug 2024
Published: 5 Mar 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G03G 15/1615
Using at least one intermediate support: relating to the driving mechanism for the intermediate support, e.g. gears, couplings, belt tensioning
G01R 19/1659
Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups…:…
G03G 15/0131
Details of unit: for transferring a pattern to a second base
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

Family

No related US applications are recorded in the indexed filing history.

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