Image forming apparatus

Patent metadata

Field	Value
Publication number	US-12338094-B2
Application number	US-202318304023-A
Country	US
Kind code	B2
Filing date	Apr 20, 2023
Priority date	Mar 5, 2014
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

An image forming apparatus includes a sheet container accommodating a recording medium therein, a sheet separating feeder including a sheet feeding body and a sheet separating body, an image forming part, and a bend applier. The sheet feeding body feeds the recording medium along with a surface movement thereof while the recording medium contacting the surface thereof. The sheet separating body forms a sheet separation nip region with the sheet feeding body and sandwiches the recording medium in the sheet separation nip region. The sheet separating feeder separates and feeds the recording medium contacting the sheet feeding body. The image forming part forms an image on the recording medium. The bend applier having a leading end of an elastic material contacts and bends the recording medium before the sheet separation nip region and generates a wrinkle extending on the recording medium in a sheet conveying direction.

First claim

What is claimed is:

1. A sheet separating feeder, comprising:
a sheet feeding body having a surface to contact a sheet and configured to feed the sheet;
a sheet separating body configured to contact the sheet feeding body from below and form a sheet separation nip region with the sheet feeding body, and to sandwich the sheet in the sheet separation nip region;
a leading end forming member having a leading end including elastic material to contact the sheet,
the leading end forming member including a leading extended portion extending from a base end portion of the leading end forming member,
the base end portion of the leading end forming member having a first face on a contact side to contact a leading end of the sheet, the first face attached to a surface of a first body forming member,
an uppermost part of the first body forming member being lower than an uppermost part of the leading end forming member,
the base end portion of the leading end forming member being located below the uppermost part of the first body forming member,
the leading extended portion of the leading end forming member not being attached to the first body forming member,
the base end portion of the leading end forming member having a second face on a side opposite the contact side, the second face attached to a surface of a second body forming member; and
a projection configured to contact the sheet,
the projection being disposed outside a side end of the sheet separating body in a direction perpendicular to a sheet conveying direction,
the entirety of the projection being disposed outside a side end of the leading end forming member in the direction perpendicular to the sheet conveying direction.

2. The sheet separating feeder according to claim 1 , wherein the leading end of the leading end forming member is projected upward.

3. The sheet separating feeder according to claim 2 ,
wherein the leading end of the leading end forming member includes multiple leading ends of the leading end forming member configured to the sheet at different positions in a direction perpendicular to the sheet conveying direction.

4. The sheet separating feeder according to claim 1 ,
wherein the leading end of the leading end forming member includes multiple leading ends of the leading end forming member configured to contact the sheet at different positions in a direction perpendicular to the sheet conveying direction.

5. The sheet separating feeder according to claim 4 ,
wherein at least one of the multiple leading ends of the leading end forming member is located at a position shifted to one side of the sheet separating body in a direction perpendicular to the sheet conveying direction and another of the multiple leading ends of the leading end forming member is located at a position shifted to the other side of sheet separating body in the direction perpendicular to the sheet conveying direction.

6. The sheet separating feeder according to claim 4 , further comprising a sheet separation nip guide disposed between two of the multiple leading ends of the leading end forming member.

7. The sheet separating feeder according to claim 6 ,
wherein the sheet separation nip guide includes a guide part, and
wherein the guide part of the sheet separation nip guide extends in a direction different from a direction in which the leading end forming member extends.

8. The sheet separating feeder according to claim 1 , further comprising a guide panel having a sheet separation nip guide configured to contact the sheet before the sheet separation nip region and to prevent the sheet from hitting against the sheet separating body before the sheet separation nip region and guide the sheet toward the sheet separation nip region.

9. An image forming apparatus, comprising:
the sheet separating feeder according to claim 1 , and
a sheet container.

10. A sheet separating feeder, comprising:
a sheet feeding body having a surface to contact a sheet and configured to feed the sheet;
a sheet separating body configured to contact the sheet feeding body from below and form a sheet separation nip region with the sheet feeding body, and to sandwich the sheet in the sheet separation nip region;
a leading end forming member having a leading end including elastic material to contact the sheet,
the leading end forming member including a leading extended portion extending from a base end portion of the leading end forming member,
the base end portion of the leading end forming member having a first face on a contact side to contact a leading end of the sheet, the first face attached to a surface of a first body forming member,
an uppermost part of the first body forming member being lower than an uppermost part of the leading end forming member,
the base end portion of the leading end forming member being located below the uppermost part of the first body forming member,
the leading extended portion of the leading end forming member not being attached to the first body forming member,
the base end portion of the leading end forming member having a second face on a side opposite the contact side, the second face attached to a surface of a second body forming member; and
a projection configured to contact the sheet from below,
the projection being disposed outside a side end of the sheet separating body in a direction perpendicular to the sheet conveying direction,
the projection being disposed outside a side end of the leading end forming member in the direction perpendicular to the sheet conveying direction,
the projection being disposed from a downstream side to an upstream side in the sheet conveying direction across the sheet separation nip region.

11. An image forming apparatus, comprising:
the sheet separating feeder according to claim 10 , and
a sheet container.

12. A sheet separating feeder, comprising:
a sheet feeding body having a surface to contact a sheet and configured to feed the sheet;
a sheet separating body configured to contact the sheet feeding body from below and form a sheet separation nip region with the sheet feeding body, and to sandwich the sheet in the sheet separation nip region;
a leading end forming member disposed upstream from the sheet separation nip region in a sheet conveying direction,
the leading end forming member having a leading end including elastic material to contact the sheet,
the leading end forming member including a leading extended portion extending from a base end portion of the leading end forming member,
the base end portion of the leading end forming member having a first face on a contact side to contact a leading end of the sheet, the first face attached to a surface of a first body forming member,
an uppermost part of the first body forming member being lower than an uppermost part of the leading end forming member,
the base end portion of the leading end forming member being located below the uppermost part of the first body forming member,
the leading extended portion of the leading end forming member not being attached to the first body forming member,
the base end portion of the leading end forming member having a second face on a side opposite the contact side, the second face attached to a surface of a second body forming member; and
a projection configured to contact the sheet,
the projection being disposed outside a side end of the sheet separating body in a direction perpendicular to a sheet conveying direction,
wherein a gap is formed between the projection and the leading end forming member in the direction perpendicular to the sheet conveying direction.

13. An image forming apparatus, comprising:
the sh

Assignees

• Aoyama Jumpei
• Nonaka Manabu
• Nishida Hajime
• Tobinaga Hideki
• Kamichi Junpei
• Kuno Satoshi
• Kobayashi Shun
• Ricoh Co Ltd

Inventors

• Aoyama Jumpei
• Nonaka Manabu
• Nishida Hajime
• Tobinaga Hideki
• Kamichi Junpei
• Kuno Satoshi
• Kobayashi Shun

Classifications

• B65H2402/54

  Springs, e.g. helical or leaf springs · CPC title

• B65H2601/324

  Removability or inter-changeability of machine parts, e.g. for maintenance · CPC title

• B65H2405/313

  with integrated handling means, e.g. separating means · CPC title

• B65H2404/1521

  rotating, pivoting or oscillating around an axis, e.g. parallel to the roller axis · CPC title

• B65H2404/117

  comprising hollow portions · CPC title