Image forming apparatus

• US 6,721,521 B2
• Filed: 02/12/2001
• Issued: 04/13/2004
• Est. Priority Date: 03/03/2000
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Kataoka, Hiroshi, Fukunaga, Keizo, Taniguchi, Tadasu
• Primary Examiner(s): Chen, Sophia S.
• Application Number:
  US09/780,347
• Publication Number:
  US 20010019418A1
• Time in Patent Office: 1,156 Days
• Field of Search: 399/112, 399/111, 399/110, 399/223, 399/225, 399/298, 399/299, 399/302, 347/138, 347/152
• US Class Current: 399/112
• CPC Class Codes: G03G 15/0194 primary transfer to the final recording medium G03G15/0184 takes precedence
• CPC Class Codes: G03G 21/1609 for space saving, e.g. structural arrangements
• CPC Class Codes: G03G 2221/1603 for multicoloured copies
• CPC Class Codes: G03G 2221/1684 using extractable subframes, e.g. on rails or hinges

Abstract

An image forming apparatus includes the first image forming section for forming color images, and the second image forming section for forming monochrome images, wherein the first image forming section is slidable through an opening formed on the front face of the main body, while the second image forming section is slidable through an opening formed on the side face of the main body so that the first and second image forming sections slide in mutually orthogonal directions. With this arrangement, various maintenance operations of each unit can be performed while suppressing a reduction in strength of the main body, whereby degradation of image quality with life can be avoided for a long period of time.

Claims

1. An image forming apparatus, comprising:

first image forming sections for forming an image;

second image forming sections for forming an image in different color from the image formed by said first image forming sections; and

an intermediate transfer medium disposed between said first image forming sections and said second image forming sections,

wherein the image formed by said first image forming sections and the image formed by said second image forming sections are transferred onto a recording medium by said intermediate transfer medium, and

said first image forming sections and said second image forming sections are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions, wherein;

said first image forming sections and said second image forming sections include, for respective different colors, image holding members for holding electrostatic latent images according to the image data, said image holding members are rotatable about respective axes aligned in a same direction, and

one of said first image forming sections and said second image forming sections are slidable in an axial direction of the image holding members and the others of said first image forming sections and said second image forming sections are slidable in a direction orthogonal to the axial direction.

2. The image forming apparatus as set forth in claim 1, wherein:

a diameter of respective image holding members of said first image forming sections is smaller than a diameter of an image holding member of said second image forming sections.

3. An image forming apparatus, comprising:

first image forming sections for forming an image;

second image forming sections for forming an image in different color from the image formed by said first image forming sections; and

an intermediate transfer medium disposed between said first image forming sections and said second image forming sections,

wherein the image formed by said first image forming sections and the image formed by said second image forming sections are transferred onto a recording medium by said intermediate transfer medium, and

said first image forming sections and said second image forming sections are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions, wherein;

one of said first image forming sections and said second image forming sections are provided for forming black-and-white images, and the other of said first image forming sections and said second image forming sections are provided for forming color images, wherein;

said first image forming sections are slidable in an axial direction of the image holding members, and said second image forming sections are slidable in a direction orthogonal to the axial direction.

4. An image forming apparatus, comprising:

first image forming sections for forming an image;

second image forming sections for forming an image in different color from the image formed by said first image forming sections; and

an intermediate transfer medium disposed between said first image forming sections and said second image forming sections,

wherein the image formed by said first image forming sections and the image formed by said second image forming sections are transferred onto a recording medium by said intermediate transfer medium, and

said first image forming sections and said second image forming sections are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions, wherein;

one of said first image forming sections and said second image forming sections are provided for forming black-and-white images, and the other of said first image forming sections and said second image forming sections are provided for forming color images, wherein;

said first image forming sections are slidable in a direction orthogonal to an axial direction of the image holding members, and said second image forming sections are slidable in the axial direction.

5. An image forming apparatus, comprising:

a first image forming section for forming an image;

a second image forming section for forming an image in different color from the image formed by said first image forming section, and

an intermediate transfer medium disposed between said first image forming section and said second image forming section,

wherein the image formed by said first image forming section and the image formed by said second image forming section are transferred onto a recording medium by said intermediate transfer medium, and

said first image forming section and said second image forming section are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions, and;

guide means for guiding sliding movements of said first image forming section or said second image forming section in such a manner that said first image forming section or said second image forming section is separated from or is in contact with said intermediate transfer medium interlocking with the sliding movements of said first image forming section or said second image forming section, respectively.

6. The image forming apparatus as set forth in claim 5, wherein:

said guide means includes guide rails and guide pins, is a sliding mechanism of said first image forming section or said second image forming section.

7. An image forming apparatus, comprising:

a first image forming section for forming an image;

a second image forming section for forming an image in different color from the image formed by said first image forming section, and

an intermediate transfer medium disposed between said first image forming section and said second image forming section,

wherein the image formed by said first image forming section and the image formed by said second image forming section are transferred onto a recording medium by said intermediate transfer medium, and

said first image forming section and said second image forming section are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions, wherein;

said first image forming section and said second image forming section include for respective different colors pairs of image holding member units for forming electrostatic latent images according to image data and developing units for developing the electrostatic latent images.

8. The image forming apparatus as set forth in claim 7, wherein:

each of said image holding member units includes a developing section for developing an electrostatic latent image formed on an image holding member with toner in corresponding color, and a developer vessel for supplying the toner to said developing section.

9. The image forming apparatus as set forth in claim 7, wherein:

each of said image holding member units includes an image holding member for holding the electrostatic latent image, a charger for charging a surface of the image holding member, and a cleaning unit for cleaning the surface of the image holding member.

10. An image forming apparatus, comprising:

first image forming sections for forming an image;

second image forming sections for forming an image in different color from the image formed by said first image forming section;

an intermediate transfer medium disposed between said first image forming sections and said second image forming sections,

wherein the image formed by said first image forming sections and the image formed by said second image forming sections are transferred onto a recording medium by said intermediate transfer medium,

said first image forming sections and said second image forming sections are slidable in mutually different directions respectively through openings formed on an apparatus main body in respective sliding directions,

one of said first image forming sections and said second forming sections are slidable in an axial direction of the image holding members, and the other of said first image forming sections and said second image forming sections are slidable in a direction orthogonal to the axial direction.