# US 9,430,176 B2 · Printing apparatus, control method of the printing apparatus, and storage medium

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- Number: US 9,430,176 B2
- Document ID: US9430176B2
- Status: Granted
- Kind: B2
- Application number: 14/099,847
- Filed: 2013-12-06
- Published: 2014-06-12
- Granted: 2016-08-30
- Earliest claimed: 2012-12-10
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kazutaka Shinagawa
- Web page: https://patentgrep.com/patent/US9430176B2

## CPC

- G06F 3/1296: {Printer job scheduling or printer resource handling}
- G03G 15/2046: {specially for the influence of heat loss, e.g. due to the contact with the copy material or other roller}
- G03G 15/5025: {by measuring the original characteristics, e.g. contrast, density}
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

A printing apparatus sets, as time for performing pre-processing before performing print processing, first time if the printing rate calculated by the calculation unit is smaller than a predetermined value, and second time that is longer than the first time if the printing rate calculated by the calculation unit is larger than the predetermined value.

## Claims

### Claim 1

A printing apparatus that performs, before forming an image on a sheet, pre-rotation processing including at least heating of a fixing unit, the printing apparatus comprising:
a controller; and
a printer engine, wherein the printer engine comprises:
a receiving unit configured to receive a print instruction from the controller;
a determining unit configured to determine whether or not it is necessary to reduce a performing time of the pre-rotation processing such that the performing time becomes shorter than a default time, based on information included in the received print instruction; and
a processing unit configured to perform the pre-rotation processing for the default time in a case where the determining unit determines that it is unnecessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time, and perform the pre-rotation processing for a time shorter than the default time in a case where the determining unit determines that it is necessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time.

### Claim 2 (depends on 1)

The printing apparatus according to claim 1,
wherein, in a case where the information included in the received print instruction satisfies a first condition, the determining unit determines that it is necessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter by a first time than the default time;
wherein, in a case where the information included in the received print instruction satisfies a second condition, the determining unit determines that it is necessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter by a second time than the default time; and
wherein, in a case where the information included in the received print instruction satisfies a third condition, the determining unit determines that it is unnecessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time.

### Claim 3 (depends on 1)

The printing apparatus according to claim 1, wherein the pre-rotation processing further includes a rotation control of a polygonal mirror.

### Claim 4

A method for controlling a printing apparatus that performs, before forming an image on a sheet, pre-rotation processing including at least heating of a fixing unit, the method comprising:
receiving a print instruction;
determining whether or not it is necessary to reduce a performing time of the pre-rotation processing such that the performing time becomes shorter than a default time, based on information included in the received print instruction; and
performing the pre-rotation processing for the default time in a case where the determining unit determines that it is unnecessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time, and perform the pre-rotation processing for a time shorter than the default time in a case where the determining unit determines that it is necessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time.

### Claim 5

A non-transitory storage medium for storing a program for causing a computer to execute a method of controlling a printing apparatus that performs, before forming an image on a sheet, pre-rotation processing including at least heating of a fixing unit, the method comprising:
receiving a print instruction;
determining whether or not it is necessary to reduce a performing time of the pre-rotation processing such that the performing time becomes shorter than a default time, based on information included in the received print instruction; and
performing the pre-rotation processing for the default time in a case where the determining unit determines that it is unnecessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time, and perform the pre-rotation processing for a time shorter than the default time in a case where the determining unit determines that it is necessary to reduce the performing time of the pre-rotation processing such that the performing time becomes shorter than the default time.