Image forming apparatus, method of controlling the same, and storage medium

Patent metadata

Field	Value
Publication number	US-2018017916-A1
Application number	US-201615540064-A
Country	US
Kind code	A1
Filing date	Jan 19, 2016
Priority date	Jan 22, 2015
Publication date	Jan 18, 2018
Grant date	—

Abstract

An image forming apparatus forms an image designated by a job on a sheet fed from one of paper feed sources. Detection unit for detecting paper types of sheets respectively fed from the paper feed sources is provided on a conveyance path used in common for the fed sheets, and the detected paper types are held in one-to-one correspondence with the paper feed sources. The apparatus also hold a job-designated paper size and a job-designated paper type or a condition related to setting of a paper type. If the job includes the condition, a paper feed source that satisfies the condition is selected with reference to the paper sizes and the paper types set by the user and/or the paper types detected by the detection unit in one-to-one correspondence with the paper feed sources.

First claim

1 . An image forming apparatus for forming an image designated by a job on a sheet fed from one of a plurality of paper feed sources, the image forming apparatus comprising:
a detection unit that detects paper types of sheets respectively fed from the plurality of paper feed sources when the sheets are conveyed, the detection unit being provided on a conveyance path used in common for the fed sheets; a memory device that stores a set of instructions; and at least one processor that executes the instructions to function as:
a first holding unit configured to hold paper sizes and paper types that are set by a user in one-to-one correspondence with the plurality of paper feed sources;
a second holding unit configured to hold the paper types detected by the detection unit in one-to-one correspondence with the plurality of paper feed sources;
a third holding unit configured to hold a paper size designated by the job and a paper type designated by the job or a condition related to setting of a paper type;
a first selection unit configured to, when the third holding unit holds the paper size and the paper type designated by the job, select, from among the plurality of paper feed sources, a paper feed source loaded with sheets having the paper size and the paper type designated by the job with reference to the first holding unit;
a second selection unit configured to, when the third holding unit holds the condition, select, from among the plurality of paper feed sources, a paper feed source that satisfies the condition with reference to at least one of the first holding unit and the second holding unit; and
a control unit configured to perform control to feed a sheet from the paper feed source selected by the first selection unit or the second selection unit, and form the image designated by the job on the fed sheet.

2 . The image forming apparatus according to claim 1 ,
wherein the paper types, set by the user and held by the first holding unit, include a free designation indicating that no paper type is specified, and when the condition includes a first condition under which the paper types held by the first holding unit are prioritized in selecting a paper feed source, the second selection unit selects a paper feed source corresponding to one of the paper types held by the second holding unit that matches the job-designated paper size and paper type held by the third holding unit.

3 . The image forming apparatus according to claim 2 ,
wherein the paper types, set by the user and held by the first holding unit, include a free designation indicating that no paper type is specified, and when the condition does not include the first condition under which the paper types held by the first holding unit are prioritized in selecting a paper feed source, the second selection unit selects a paper feed source that matches the job-designated paper size held by the third holding unit.

4 . The image forming apparatus according to claim 1 ,
wherein the paper types, set by the user and held by the first holding unit, include a free designation indicating that no paper type is specified, and when the condition includes a first condition under which the paper types held by the first holding unit are prioritized in selecting a paper feed source and the second holding unit does not hold the paper type corresponding to a target paper feed source, the second selection unit selects the target paper feed source if the paper size set for the target paper feed source matches the job-designated paper size held by the third holding unit.

5 . The image forming apparatus according to claim 1 , wherein the first selection unit and the second selection unit respectively execute processing for the selection in sequence with respect to target paper feed sources included in a list of paper feed sources to be selected from among the plurality of paper feed sources.

6 . The image forming apparatus according to claim 1 , wherein the first holding unit holds setting information related to a default paper feed source set by the user, and when the condition includes a second condition under which a paper feed source is automatically selected, the second selection unit selects the default paper feed source related to the setting information held by the first holding unit.

7 . The image forming apparatus according to claim 1 ,
wherein the second holding unit includes a counting unit configured to count, for each of the plurality of paper feed sources, the number of times the detection unit has performed the detection, when the number counted by the counting unit is smaller than a predetermined number, the second holding unit holds a detection result of the first sheet as the paper type detected by the detection unit with respect to the corresponding paper feed source, and when the number counted by the counting unit is equal to or greater than the predetermined number, the second holding unit holds a detection result that appears most frequently as the paper type detected by the detection unit with respect to the corresponding paper feed source.

8 . A method of controlling an image forming apparatus for forming an image designated by a job on a sheet fed from one of a plurality of paper feed sources, the method comprising:
holding paper sizes and paper types that are set by a user in one-to-one correspondence with the plurality of paper feed sources; detecting paper types of sheets respectively fed from the plurality of paper feed sources when the sheets are conveyed, the detecting being performed on a conveyance path used in common for the fed sheets; holding the paper types detected in the detecting in one-to-one correspondence with the plurality of paper feed sources; holding a paper size designated by the job and a paper type designated by the job or a condition related to setting of a paper type; selecting, when the paper size and the paper type designated by the job are held, from among the plurality of paper feed sources, a paper feed source loaded with sheets having the paper size and the paper type designated by the job with reference to information set by the user; selecting, when the condition is held, from among the plurality of paper feed sources, a paper feed source that satisfies the condition with reference to information set by at least one of the user and the paper types detected in the detecting; and performing control to feed a sheet from the paper feed source selected with reference to the information set by the user or the paper types detected in the detecting, and form the image designated by the job thereon.

9 . A non-transitory computer-readable storage medium having stored therein a program for causing a computer to execute a method of controlling an image forming apparatus for forming an image designated by a job on a sheet fed from one of a plurality of paper feed sources, the method comprising:
holding paper sizes and paper types that are set by the user in one-to-one correspondence with the plurality of paper feed sources; detecting paper types of sheets respectively fed from the plurality of paper feed sources when the sheets are conveyed, the detecting being performed on a conveyance path used in common for the fed sheets; holding the paper types detected in the detecting in one-to-one correspondence with the plurality of paper feed sources; holding a paper size designated by the job and a paper type designated by the job or a condition related to setting of a paper type; selecting, when the paper size and the paper type designated by the job are held, from among the plurality of paper feed sources, a paper feed source loaded with sheets having the paper size and the paper type designated by the job with reference to inf

Assignees

• Canon Kk

Inventors

• Sasaki Hidemi

Classifications

• G03G2215/0132

  vertical medium transport path at the secondary transfer · CPC title

• B65H2701/1131

  of sheets · CPC title

• B41J29/38

  Drives, motors, controls or automatic cut-off devices for the entire printing mechanism · CPC title

• G03G2215/00603

  Control of other part of the apparatus according to the state of copy medium feeding · CPC title

• B65H5/06

  by rollers {or balls, e.g. between rollers (transport by suction rollers B65H5/226)} · CPC title