US 8,783,683 B2Granted

Image forming apparatus and image forming system

AssigneeKonica Minolta Business Technologies, Inc.

InventorsKenji Izumiya, Hiroshi Oyama, Yumiko Izumiya

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Abstract

An image forming apparatus acquires sheet information indicating paper weight or the like of a transported sheet of paper. The apparatus also has a control portion and shifts a reference position which has been previously set to a direction orthogonal to a transporting direction of the sheet of paper based on the paper weight or the like of the transported sheet of paper. A deviation sensor detects a deviation of the sheet of paper with regard to the shifted reference position along the direction orthogonal to the transporting direction of the sheet of paper. A sheet shift portion shifts the sheet of paper to the shifted reference position based on the deviation detected by the deviation sensor.

Claims14

Dependent claims

An image forming apparatus that forms an image on a sheet of paper, the apparatus comprising:

an information acquiring portion which acquires sheet information indicating quality or transporting condition of the transported sheet of paper;
a control portion that is configured to shift a reference position which has been previously set to a direction orthogonal to a transporting direction of the sheet of paper based on the sheet information acquired by the information acquiring portion;
a detection portion which detects a deviation of the sheet of paper with regard to the reference position shifted by the control portion along the direction that is orthogonal to the transporting direction of the sheet of paper;
and
a sheet shift portion which shifts the sheet of paper to the reference position shifted by the control portion based on the deviation detected by the detection portion, the sheet shift portion being positioned at an upstream side of an image forming position on which the image is formed on the sheet of paper;
wherein the information acquiring portion includes a paper-weight-acquiring part which acquires paper weight as the quality of the transported sheet of paper;
wherein the control portion is configured to shift the reference position to the direction orthogonal to the transporting direction of the sheet of paper based on the paper weight of the sheet of paper acquired by the paper-weight-acquiring part;
wherein the control portion is configured to stop a shift operation of the reference position when the paper weight of the sheet of paper acquired by the paper-weight-acquiring part is smaller than a previously set weight reference value;
and
wherein the control portion is configured to perform the shift operation of the reference position when the paper weight of the sheet of paper acquired by the paper-weight-acquiring part is not smaller than the previously set weight reference value.

7 more elements

An image forming system comprising:

(i) an image forming apparatus that forms an image on a sheet of paper, the apparatus including:
an information acquiring portion which acquires sheet information indicating quality or transporting condition of the transported sheet of paper;
a control portion that is configured to shift a reference position which has been previously set to a direction that is orthogonal to a transporting direction of the sheet of paper based on the sheet information acquired by the information acquiring portion;
a detection portion which detects a deviation of the sheet of paper in relation to the reference position shifted by the control portion along the direction that is orthogonal to the transporting direction of the sheet of paper;
and
a sheet shift portion which shifts the sheet of paper to the reference position shifted by the control portion based on the deviation detected by the detection portion, the sheet shift portion being positioned at an upstream side of an image forming position on which the image is formed on the sheet of paper;
wherein the information acquiring portion includes a paper-weight-acquiring part which acquires paper weight as the quality of the transported sheet of paper;
wherein the control portion is configured to shift the reference position to the direction orthogonal to the transporting direction of the sheet of paper based on the paper weight of the sheet of paper acquired by the paper-weight-acquiring part;
wherein the control portion is configured to stop a shift operation of the reference position when the paper weight of the sheet of paper acquired by the paper-weight-acquiring part is smaller than a previously set weight reference value;
and
wherein the control portion is configured to perform the shift operation of the reference position when the paper weight of the sheet of paper acquired by the paper-weight-acquiring part is not smaller than the previously set weight reference value;
and
(ii) a post-processing device including a paper alignment portion which aligns the sheet of paper ejected from the image forming apparatus.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/562,644Filed 31 Jul 2012
Priority: JP 2011-1694132 Aug 2011
Published: US 2013/0032993 A17 Feb 2013
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B65H 7/10
Responsive to presence of faulty articles or incorrect separation or feed: responsive to incorrect side register
B65H 9/006
Deskewing sheet by abutting against a stop, i.e. producing a buckling of the sheet: the stop being formed by forwarding means in stand-by
B65H 2301/331
Modifying, selecting, changing orientation: skewing, correcting skew, i.e. changing slightly orientation of material
B65H 2301/3613
During displacement: lateral positioning

Family

US 2013/0032993 A1Pre-grant publication · published 7 Feb 2013
US 8,783,683 B2This patent

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

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