US 4,288,068 A · Sheet feeding device

Abstract

A sheet feeding device including a sheet separating mechanism consisting of a feeding member and a braking separating member for preventing feeding of a plurality of sheets, and a speed adjusting mechanism for varying as desired the sheet feeding speed. The spacing between the feeding member and the braking separating member is determined based on a predetermined sheet feeding speed, and the sheet conveying force exerted by the feeding member is set at a level higher than the sheet arresting force exerted by the braking separating member. A supporting member for journalling at least one of the feeding member and the braking separating member and being movable for movement of one member toward the other member, and a transmission for moving the supporting member in synchronism with the movement of an adjusting member of the speed adjusting mechanism are provided, to vary the spacing between the feeding member and the braking separating member in accordance with a change in the sheet feeding speed.

Claims7

Dependent claims

A sheet feeding device comprising:

a sheet feeding member maintained in contact with the uppermost sheet of a stack of sheets for feeding one sheet after another in a sheet feeding direction;
sheet separating means including a pair of separating members comprising a feeding member for exerting a sheet conveying force on a sheet, and a braking separating member exerting a sheet arresting force on a sheet to stop the movement thereof or forcing same to move oppositely to the sheet feeding direction, said separating members being located downstream of said sheet feeding member with respect to the sheet feeding direction;
a speed adjusting mechanism including an adjusting member for suitably adjusting the sheet feeding speed;
a supporting member for journalling at least one of said feeding member and said braking separating member for movement toward or away from the other separating member;
and
transmission means operative to move said supporting member in synchronism with the movements of said adjusting member of said speed adjusting mechanism to vary the spacing between said feeding member and said braking separating member.

3 more elements

Dependencies are inferred from the claim text.

Sheet feeding device

Life of this patent

Sheet feeding device

Life of this patent

Abstract

Claims7