Sheet supplying apparatus and recording or reading apparatus

An apparatus for effecting recording or reading of information on a sheet, comprising:

• a sheet supplying means for supplying a sheet, said sheet supplying means including
• (A) a sheet holding member adapted to hold a plurality of sheets and having a regulating wall for regulating movement of the sheets in a sheet supplying direction,
• (B) a sucker member having a sucker for absorbing an uppermost sheet among the sheets held by said sheet holding member,
• (C) pressure reduction means for reducing pressure in said sucker,
• (D) drive means for driving said sucker member to convey the sheet absorbed by said sucker,
• (E) height detecting means for detecting a height position of the uppermost sheet, and
• (F) a sheet urging means for urging the sheets in a sheet stacking direction and for moving the sheet toward said regulating wall, said sheet urging means urging the uppermost sheet with predetermined pressure on the basis of a detected result from said height detecting means;
• and
• a recording or reading means for effecting recording or reading of information on the sheet supplied by said sheet supplying means.

A sheet supplying apparatus comprising:

• a sheet containing portion having a regulating wall for regulating movement of sheets;
• a sucker member for absorbing an uppermost sheet among the sheets in said sheet containing portion;
• a shifting mechanism for shifting said sucker member to convey the sheet absorbed by said sucker member;
• and
• a sheet urging mechanism operated for urging the sheets in a sheet stacking direction and for moving the sheet toward said regulating wall, said sheet urging mechanism being constructed to urge the uppermost sheet with predetermined pressure, wherein
• said sheet urging mechanism is only operated before the uppermost sheet is absorbed by said sucker member.

An apparatus for effecting recording or reading of information on a sheet, comprising:

• a sheet supplying unit adapted to supply a sheet, said sheet supplying unit including
• (A) a sheet containing portion having a regulating wall for regulating movement of sheets,
• (B) a sucker member for absorbing an uppermost sheet among the sheets in said sheet containing portion,
• (C) a shifting mechanism for shifting said sucker member to convey the sheet absorbed by said sucker member, and
• (D) a sheet urging mechanism for urging the sheets in the sheet stacking direction and for moving the sheet toward said regulating wall, said sheet urging mechanism being constructed to urge the uppermost sheet with predetermined pressure, wherein said sheet urging mechanism is only operated before the uppermost sheet is absorbed by said sucker member;
• and
• a recording or reading unit for effecting recording or reading of information on the sheet supplied by said sheet supplying unit.