Image forming apparatus

Patent metadata

Field	Value
Publication number	US-2019129349-A1
Application number	US-201816166283-A
Country	US
Kind code	A1
Filing date	Oct 22, 2018
Priority date	Oct 27, 2017
Publication date	May 2, 2019
Grant date	—

Abstract

Disclosed is an image forming apparatus. The apparatus includes a transfer portion configured to transfer the toner image on an intermediate transfer member onto a sheet; a conveying portion configure to convey the sheet to a nip between the intermediate transfer member and the transfer portion; a fixing portion configured to fix the transferred toner image on the sheet; and a fixing motor configured to drive the fixing portion.
When a sheet jam occurs and when a sheet nipped by the conveying portion, the nip and the fixing portion is not a jam factor sheet, the intermediate transfer portion and the transfer portion are brought from a contact state into a separation state, the fixing motor is stopped after the intermediate transfer member and the transfer portion are separated, and the fixing motor is driven in order to convey the sheet after the sheet jam is recovered.

First claim

What is claimed is:

1 . An image forming apparatus, comprising:
an image forming unit configured to form a toner image on a photosensitive body; an intermediate transfer member on which the toner image on the photosensitive body is transferred; a transfer portion configured to transfer the toner image on the intermediate transfer member onto a sheet; a conveying portion configured to convey the sheet to a nip between the intermediate transfer member and the transfer portion; a fixing portion configured to fix the transferred toner image on the sheet; a fixing motor configured to drive the fixing portion; a contact and separation mechanism configured to bring the intermediate transfer member and the transfer portion into a contact state and into a separation state; and a controller configured to control the fixing motor and the contact and separation mechanism, wherein when a sheet jam occurs and when the sheet nipped by the conveying portion, the nip and the fixing portion is not a jam factor sheet, the controller controls the contact and separation mechanism so as to bring the intermediate transfer portion and the transfer portion from the contact state into the separation state, the controller stops the fixing motor after the intermediate transfer member and the transfer portion are separated, and the controller drives the fixing motor in order to convey the sheet after the sheet jam is recovered.

2 . The image forming apparatus according to claim 1 ,
wherein when a sheet jam occurs and when the sheet nipped by the conveying portion, the nip and the fixing portion is a jam factor sheet, the controller stops the fixing motor after the intermediate transfer member and the transfer portion are separated.

3 . The image forming apparatus according to claim 1 , further comprising:
a conveying motor configured to drive the conveying portion; and an intermediate transfer member motor configure to drive the intermediate transfer member, wherein the controller stops the fixing motor, the conveying motor and the intermediate transfer member motor after the intermediate transfer member and the transfer portion are separated.

4 . The image forming apparatus according to claim 3 ,
wherein a time period taken for stopping the intermediate transfer member is longer than a time period taken for stopping the fixing motor.

Assignees

• Canon Kk

Inventors

• Nakabayashi Junichiro

Classifications

• G03G15/1605

  using at least one intermediate support (G03G15/1625 takes precedence) · CPC title

• G03G15/2028

  with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means · CPC title

• G03G15/70 Primary

  Detecting malfunctions relating to paper handling, e.g. jams · CPC title