Image forming apparatus

• US 6,523,929 B2
• Filed: 02/22/2001
• Issued: 02/25/2003
• Est. Priority Date: 02/24/2000
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nishiberi, Nozomu, Yoshida, Masahito, Saijo, Yasutsugu, Kan, Shoichi, Shinmachi, Masaya
• Primary Examiner(s): Hsieh, Shih-wen
• Application Number:
  US09/789,613
• Publication Number:
  US 20010017635A1
• Time in Patent Office: 733 Days
• Field of Search: 347/22, 347/23, 347/29, 347/30, 347/32, 347/33, 347/37, 347/101, 347/104
• US Class Current: 347/22
• CPC Class Codes: B41J 2/1652 by driving a fluid through the nozzles to the outside thereof, e.g. by applying pressure to the inside or vacuum at the outside of the print head
• CPC Class Codes: B41J 23/025 using a single or common power source for two or more functions

Abstract

According to an image forming apparatus, a simple arrangement is used to switch the transmission of drive forces, produced by drive sources that are used in common by multiple drive mechanisms, without depending on the movement of a carriage, for example. The drive force produced by a line feed (LF) motor to drive feed rollers is transmitted to a pump cam in a recovery system via a pendulum drive force transmission mechanism, which is provided at one end close to the feed rollers. And the drive force produced by another motor to drive paper supply rollers is transmitted via the same pendulum drive force transmission mechanism to the paper supply rollers, or to a blade holder and a cap holder in the recovery system. Therefore, the transmission of the drive forces can be switched by controlling the rotational directions of the motors.

Claims

1. An image forming apparatus, which employs a recording head to record data on a recording medium, comprising:

recovery means for maintaining recording performance of said recording head;

a first drive source for driving feeding means for the recording medium; and

a second drive source for driving supply means for supplying the recording medium to said feeding means,

wherein said first drive source also serves as a drive source for a first drive mechanism in said recovery means by using a switching mechanism for changing a transmission of a drive force in accordance with a change in an operating direction of said first drive source, and

wherein said second drive source also serves as a drive source for a second drive mechanism in said recovery means by using a switching mechanism for changing a transmission of a drive force in accordance with a change in an operating direction of said second drive source.

2. An image forming apparatus according to claim 1, further comprising:

a third drive source for scanning said recording head,

wherein the switching mechanisms for said first and said second drive sources are operated independently of the scanning of said recording head by said third drive source.

3. An image forming apparatus according to claim 1,

wherein said first and said second drive sources have at least two driving modes that can be arbitrarily switched by said switching mechanisms, respectively, and

wherein said feeding means is driven in a first driving mode of said first drive source, said first drive mechanism of said recovery means is driven in a second driving mode of said first drive source, said supply means is driven in a first driving mode of said second drive source, and said second drive mechanism of said recovery means is driven in a second driving mode of said second drive source.

4. An image forming apparatus according to claim 3, wherein said first and said second drive sources are motors, and wherein the first and said second driving modes of said first and said second drive sources are operations using forward rotation and reverse rotation of said motors.

5. An image forming apparatus according to one of claims 1 to 4, wherein said recording head is an ink-jet recording head for ejecting ink, and wherein said first drive mechanism of said recovery means is a pump for suctioning ink out of discharging orifices of said recording head, and said second drive mechanism of said recovery means is a capping mechanism for covering said discharging orifices of said recording head or a wiping mechanism for wiping said discharging orifices of said recording head.

6. An image forming apparatus according to claim 5, wherein said pump is driven at an arbitrary timing during operation of said capping mechanism.

7. An image forming apparatus according to claim 5, wherein said recording head is an ink-jet recording head that uses thermal energy to eject ink.