Patent ID: 9359156
Filing Date: 2016-06-07
CPC Classification: B65H

Claim Text:
1. A paper feeding apparatus, including an attachable and detachable cassette having a lift plate, a paper being placed thereon, and a raising part to raise the lift plate, comprising: a contact piece, being inclined by said lift plate; a light shielding member, being turned in accordance with the inclination of the contact piece; and an optical sensor part, detecting a position of the light shielding member; wherein: an opening is formed in said lift plate; said optical sensor part includes: a first sensor and a second sensor that are switched ON or OFF by said light shielding member; said light shielding member reaches a first position, upon said cassette having been removed, thereby said contact piece having a first inclination; when said light shielding member is positioned in the first position, said first sensor and said second sensor are turned OFF; said light shielding member reaches a second position, upon said contact piece having been contacted with an opening edge part formed in said lift plate, thereby having a second inclination; when said light shielding member is positioned in the second position, said first sensor is turned OFF and said second sensor is turned ON; said light shielding member reaches a third position, upon said contact piece having been contacted with the uppermost layer of the paper placed on said lift plate positioned in the lowest position, thereby having a third inclination; when said light shielding member is positioned in the third position, said first sensor and said second sensor are turned ON; said light shielding member reaches a fourth position, upon said raising part having been driven to raise said lift plate to a rising stop position to feed said paper, thereby said contact piece having a fourth inclination; and when said light shielding member is positioned in the fourth position, said first sensor is turned ON, and said second sensor is turned OFF.