US 2016/0097994 A1Published application

Image forming apparatus

AssigneeCanon Kabushiki Kaisha

InventorsYoshikuni Ito, Yasuhiro Horiguchi, Takayuki Tanaka, Kenji Karashima, Satoshi Tsuruya, Shinichi Nishida, Takeshi Fujino

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Abstract

An image forming apparatus sequentially transfers toner images formed on a plurality of photosensitive drums onto an intermediate transfer member or a transfer material to form an image. The image forming apparatus includes an intermediate transfer belt provided with electrical conductivity, and a power supply for applying a voltage to a secondary transfer roller to pass a current from the secondary transfer roller to the plurality of photosensitive drums via the intermediate transfer belt, thus primarily transferring the toner images from the plurality of photosensitive drums onto the intermediate transfer belt.

Claims22

Dependent claims

An image forming apparatus comprising:

a plurality of image bearing members configured to bear a toner image;
a rotatable endless intermediate transfer member provided with electrical conductivity;
a current supply member in contact with an outer circumferential surface of the intermediate transfer member;
a supporting member configured to support the intermediate transfer member by contacting with an inner periphery of the intermediate transfer member;
a constant voltage element connected to the supporting member;
and
a power supply configured to apply a voltage to the current supply member,
wherein, by applying a voltage from the power supply to the current supply member, a toner image is primary transferred from the plurality of image bearing members to the intermediate transfer member and the toner image is secondary transferred to a recording material from the intermediate transfer member.

5 more elements

An image forming apparatus comprising:

a plurality of image bearing members configured to bear a toner image;
a rotatable endless intermediate transfer member provided with electrical conductivity;
a current supply member in contact with an outer circumferential surface of the intermediate transfer member;
a supporting member configured to support the intermediate transfer member by contacting with an inner periphery of the intermediate transfer member;
a resistive element connected to the supporting member;
and
a power supply configured to apply a voltage to the current supply member,
wherein, by applying a voltage from the power supply to the current supply member, a toner image is primary transferred from the plurality of image bearing members to the intermediate transfer member and the toner image is secondary transferred to a recording material from the intermediate transfer member.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/970,399Filed 15 Dec 2015
Priority: JP 2010-2252184 Oct 2010
Published: 7 Apr 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G03G 15/80
Apparatus for electrographic processes using a charge pattern: details relating to power supplies, circuits boards, electrical connections
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 15/1605
Of a toner pattern, e.g. a powder pattern , e.g. magnetic transfer: using at least one intermediate support
G03G 15/1615
Using at least one intermediate support: relating to the driving mechanism for the intermediate support, e.g. gears, couplings, belt tensioning

Family

Application13/877,440Continuation · filed 2 Apr 2013
Application14/970,399Continuation
US 2013/0195519 A1Published application
US 9,229,400 B2Related patent
US 9,588,465 B2Related patent
US 2016/0097994 A1This patent

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