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Patent Searching and Data


Title:
IMAGE FORMING DEVICE
Document Type and Number:
Japanese Patent JP2019159184
Kind Code:
A
Abstract:
To provide an image forming device with which it is possible to detect a shift amount from the threshold of a loop amount detectable by a loop amount detector and control the conveyance speed of a recording medium on the basis of the shift amount, there by suppress the occurrence of an image defect.SOLUTION: An image forming device comprises: an image forming unit equipped with a transfer nip part; a fixing unit equipped with a fixing nip part; a flag contactable with a recording medium in order to detect a loop amount in a conveyance path leading from the transfer nip part to the fixing nip part; a sensor for detecting a loop amount with which output turns on or off in accordance with the posture of the flag; time acquisition means for acquiring a time at which sensor output occurring before the tip of a recording medium enters the fixing nip part after having passed through the transfer nip part at a prescribed conveyance speed returns from one of on and off to the one via the other; and a control unit for controlling the conveyance speed of a recording medium on the basis of the output so that the loop amount when the side of a recording medium downstream of the tip is conveyed is brought closer to a prescribed loop amount.SELECTED DRAWING: Figure 7

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Inventors:
SAITO HIDETSUGU
Application Number:
JP2018047813A
Publication Date:
September 19, 2019
Filing Date:
March 15, 2018
Export Citation:
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Assignee:
CANON KK
International Classes:
G03G15/00; B65H5/06; B65H7/14; G03G15/20
Domestic Patent References:
JP2016071182A2016-05-09
JP2007072289A2007-03-22
JP2006337994A2006-12-14
JP2007057563A2007-03-08
JP2006033055A2006-02-02
Attorney, Agent or Firm:
Kazuo Chikajima
Takashi Daejeon



 
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