| CPC B65H 19/105 (2013.01) [B65H 2553/80 (2013.01); B65H 2701/1311 (2013.01)] | 12 Claims |
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12. A sheet feeding device configured to feed a sheet from a sheet roll, the sheet feeding device comprising:
a sensor configured to detect a step at a leading end of the sheet roll;
a roller disposed at a position different from a position of the sensor in a circumferential direction of the sheet roll;
a support supporting the sensor and the roller to bring the sensor and the roller into contact with a surface of the sheet roll;
circuitry configured to acquire a sensor signal from the sensor; and
a spool insertable through a sheet tube of the sheet roll to rotate the sheet roll in conjunction with rotation of the spool, wherein
the support being pivotable within a range in which the sensor does not contact the spool, and
the circuitry is further configured to:
detect an inclination of the sensor signal when the leading end of the sheet roll passes by the sensor;
determine, when detecting the inclination at an nth rotation of the sheet roll or the spool, whether the inclination is detected again at an (n+1)th rotation of the sheet roll or the spool, where n is an integer of one or more; and
determine that the leading end of the sheet roll is present when continuously detecting the inclination for a number of rotations of the sheet roll or the spool.
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