Image forming apparatus, image forming system and detecting method of abnormal feeding

Patent metadata

Field	Value
Publication number	US-10384895-B2
Application number	US-201815991015-A
Country	US
Kind code	B2
Filing date	May 29, 2018
Priority date	May 31, 2017
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

An image forming apparatus to which a first feeding device which does not notify abnormal sheet feeding or a second feeding device which notifies the abnormal sheet feeding is connectable includes a sheet receiving portion, a sheet detector, an image forming unit, and a controller. In a case that the first feeding device is connected to the image forming apparatus, the controller discriminates that the abnormal sheet feeding occurs in the first feeding device when the detector does not detect the sheet at first timing. In a case that the second feeding device is connected to the image forming apparatus, the controller discriminates that the abnormal sheet feeding occurs at the sheet receiving portion when the detector does not detect the sheet at second timing and notification of the abnormal sheet feeding is not provided from the second feeding device.

First claim

What is claimed is:

1. An image forming apparatus to which a first feeding device which does not notify abnormal feeding of a sheet during sheet feeding therein or a second feeding device which notifies the abnormal feeding of the sheet during the sheet feeding therein is connectable, said image forming apparatus comprising:
a sheet receiving portion configured to receive the sheet from the first feeding device or the second feeding device;
a detector provided at said sheet receiving portion and configured to detect the sheet received by said sheet receiving portion;
an image forming unit configured to form an image on the sheet received by said sheet receiving portion; and
a controller configured to discriminate occurrence of the abnormal feeding of the sheet,
wherein in a case that the first feeding device is connected to said image forming apparatus, said controller discriminates that the abnormal feeding of the sheet occurs in the first feeding device when said detector does not detect the sheet at first timing of the sheet fed from the first feeding device being predicted to reach said detector, and
in a case that the second feeding device is connected to said image forming apparatus, said controller discriminates that the abnormal feeding of the sheet occurs at said sheet receiving portion when said detector does not detect the sheet at second timing of the sheet fed from the second feeding device being predicted to reach said detector and notification of the abnormal feeding of the sheet is not provided from the second feeding device.

2. An image forming apparatus according to claim 1 , further comprising a notifying unit configured to notify information,
wherein said controller controls said notifying unit so as to notify a device or a position in which the abnormal feeding of the sheet occurs.

3. An image forming apparatus according to claim 2 , wherein when said image forming apparatus is connected with said first sheet feeding device and said controller discriminates that the abnormal feeding of the sheet occurs in said first sheet feeding device, said controller controls said notifying unit so as to notify a user of a message prompting the user to check a sheet absence state of said first sheet feeding device or occurrence of the abnormal feeding of the sheet in a feeding path of said first sheet feeding device.

4. An image forming apparatus according to claim 2 , wherein when said image forming apparatus is connected with said second sheet feeding device and said controller discriminates that the abnormal feeding of the sheet occurs in said second sheet feeding device, said controller controls said notifying unit so as to display a mark indicating the position in which the abnormal feeding of the sheet occurs.

5. An image forming system comprising:
a predetermined sheet feeding device to which a first feeding device which does not notify abnormal feeding of a sheet during sheet feeding therein or a second feeding device which notifies the abnormal feeding of the sheet during the sheet feeding therein is connectable on a side upstream thereof with respect to a sheet feeding direction;
an image forming unit configured to form an image on the sheet received from said predetermined sheet feeding device; and
a controller configured to control said second sheet feeding device and said image forming apparatus,
wherein said predetermined sheet feeding device comprises,
a sheet receiving portion configured to receive the sheet from said first feeding device or said second feeding device, and
a detector configured to detect the sheet received by said sheet receiving portion,
wherein in a case that said first feeding device is connected to said predetermined sheet feeding device and the sheet is fed from said first sheet feeding device, said controller discriminates that the abnormal feeding of the sheet occurs in said first feeding device when said detector does not detect the sheet at first timing of the sheet fed from said first feeding device being predicted to reach said detector, and
in a case that the second feeding device is connected to said predetermined sheet feeding device and the sheet is fed from said second sheet feeding device, said controller discriminates that the abnormal feeding of the sheet occurs at said sheet receiving portion when said detector does not detect the sheet at second timing of the sheet fed from said second feeding device being predicted to reach said detector and notification of the abnormal feeding of the sheet is not provided from said second feeding device.

6. An image forming system according to claim 5 , further comprising a notifying unit configured to notify information,
wherein said controller controls said notifying unit so as to notify a device or a position in which the abnormal feeding of the sheet occurs.

7. An image forming system according to claim 6 , wherein when said image forming apparatus is connected with said first sheet feeding device and said controller discriminates that the abnormal feeding of the sheet occurs in said first sheet feeding device, said controller controls said notifying unit so as to notify a user of a message prompting the user to check a sheet absence state of said first sheet feeding device or occurrence of the abnormal feeding of the sheet in a feeding path of said first sheet feeding device.

8. An image forming system according to claim 6 , wherein when said image forming apparatus is connected with said second sheet feeding device and said controller discriminates that the abnormal feeding of the sheet occurs in said second sheet feeding device, said controller controls said notifying unit so as to display a mark indicating the position in which the abnormal feeding of the sheet occurs.

9. A detecting method of abnormal feeding of a sheet in an image forming apparatus, wherein the image forming apparatus to which a first feeding device which does not notify abnormal feeding of the sheet during sheet feeding therein or a second feeding device which notifies the abnormal feeding of the sheet during the sheet feeding therein is connectable, and includes a sheet receiving portion configured to receive the sheet from the first feeding device or the second feeding device, and a detector provided at the sheet receiving portion and configured to detect the sheet received by the sheet receiving portion, said detecting method comprising:
discriminating that the abnormal feeding of the sheet occurs in the first feeding device when the first feeding device is connected to the image forming apparatus and the detector does not detect the sheet at first timing of the sheet fed from the first feeding device being predicted to reach the detector; and
discriminating that the abnormal feeding of the sheet occurs at said sheet receiving portion when the second feeding device is connected to said image forming apparatus and the detector does not detect the sheet at second timing of the sheet fed from the second feeding device being predicted to reach the detector and notification of the abnormal feeding is not provided from the second feeding device.

10. A detecting method of abnormal feeding of a sheet in an image forming apparatus, wherein the image forming system includes a predetermined sheet feeding device to which a first feeding device which does not notify abnormal feeding of the sheet during sheet feeding therein or a second feeding device which notifies the abnormal feeding of the sheet during the sheet feeding therein is connectable, and an image forming unit configured to form an image on the sheet received from said predetermined sheet feeding device and wherein said predetermined sheet feeding device includes a sheet receiving portio

Assignees

• Canon Kk

Inventors

• Yokoya Takashi
• Nishikata Akinobu
• Yamamoto Satoru
• Yumoto Koji
• Kawakita Akihiro

Classifications

• B65H1/266

  Support fully or partially removable from the handling machine, e.g. cassette, drawer (B65H1/027 takes precedence) · CPC title

• B65H2405/312

  Trolley, cart, i.e. support movable on the floor · CPC title

• B41F33/06

  for starting or stopping operation of sheet or web feed · CPC title

• B65H2511/20

  Location in space · CPC title

• B65H2405/331

  Juxtaposed compartments · CPC title