Title:
SHEET FEEDER AND IMAGE FORMATION DEVICE
Document Type and Number:
Japanese Patent JP2023125770
Kind Code:
A
Abstract:
To provide a sheet feeder which determines a sheet setting direction by use of a detection configuration of a sheet tip.SOLUTION: A sheet feeder comprises: a sensor which projects toward a roll from a face-to-face part, is urged in a direction contacting an outer peripheral surface of the roll, and outputs a detection signal with a signal level depending on the amount of projection; and a controller which controls rotating means on the basis of a signal change ratio that is the amount of change of a signal level of the detection signal per unit time. The controller rotates a spool in a take-up direction by the rotating means, and stops the motion of the rotating means when the signal change ratio based on change in a relative positional relationship between the outer peripheral surface and the sensor when the tip of a sheet does not pass the position of the sensor does not exceed a predetermined reverse setting threshold.SELECTED DRAWING: Figure 16
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Inventors:
OKADA KATSUMI
SATO DAIKI
SATO DAIKI
Application Number:
JP2022030049A
Publication Date:
September 07, 2023
Filing Date:
February 28, 2022
Export Citation:
Assignee:
RICOH CO LTD
International Classes:
B65H26/00; B41J15/04; B65H16/06
Attorney, Agent or Firm:
Takashi Munakata