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US 4,061,330 AGranted
Sheet separator for use in electrophotographic copying machines
AssigneeRicoh Company, Ltd.
InventorNobuyuki Yanagawa
Life of this patent
Estimating the term…
Abstract
A sheet separator separates a copy sheet held attracted to the surface of a rotating photosensitive member by the use of a suction member pivotably disposed at a sheet separating position. The suction member includes an air suction port in its surface which is located opposite the photosensitive member. During a movement of the suction port from a first position in which it is located rearwardly, as viewed in the direction of movement of the photosensitive member, of a line joining the axis of rotation of the photosensitive member and the pivotal axis of the suction member to a second position forwardly of the line, the suction member holds the leading edge of the copy sheet attracted thereto, thereby separating it from the photosensitive member.
Claims6
A sheet separator for use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed in an end face which is located opposite the rotating member;
- support shaft means for mounting said separating means for rotation between a first position in which the air suction inlet is located rearwardly, as viewed in the direction of rotation of the rotating member, of a line joining the axes of rotation of the rotating member, and the support shaft means, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- air suction means communicating with the suction inlet for drawing air therethrough at least during a movement thereof from the position aligned with said line to the second position;
- drive means for moving the separating means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line;
- and
- means for causing the velocity of movement of the end face of the separating means to exceed the peripheral speed of the rotating member.
3 more elements
A sheet separator for use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed in an end face which is located opposite the rotating member;
- support shaft means for mounting said separating means for rotation between a first position in which the air suction inlet is located rearwardly, as viewed in the direction of rotation of the rotating member, of a line joining the axes of rotation of the rotating member, and the support shaft means, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- air suction means comprising a piston and cylinder unit communicating with the suction inlet for drawing air therethrough at least during a movement thereof from the position aligned with said line to the second position;
- and
- drive means for moving the separating means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line.
2 more elements
A sheet separator for use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed in an end face which is located opposite the rotating member;
- support shaft means for mounting said separating means for rotation between a first position in which the air suction inlet is located rearwardly, as viewed in the direction of rotation of the rotating member, of a line joining the axes of rotation of the rotating member, and the support shaft means, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- air suction means communicating with the suction inlet for drawing air therethrough at least during a movement thereof from the position aligned with said line to the second position;
- and
- drive means including a cam which also drives said air suction means for moving the separating means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line.
2 more elements
A sheet separator or use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- a suction means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed on an end face which is located opposite the rotating member;
- support shaft means for mounting said suction means for rotation between a first position in which the air suction inlet is located rearwardly as viewed in the direction of rotation of the rotating member, of a line joining the axes of the rotating member and the support shaft, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- means communicating with the suction means for drawing air from the interior thereof at least during its movement from the position aligned with the line to the second position;
- drive means for moving the suction means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line;
- a nozzle means for injecting a quantity of air into the clearance between the end face of the suction means and the surface of the rotating member at least during the movement of the suction means from the position aligned with the line to the second position;
- and
- means with which both the suction means and the nozzle means communicate for producing a suction/discharge action, and comprising a piston and cylinder unit, whereby the suction through the suction means and the discharge through the nozzle means takes place alternately by a reciprocatory motion of the piston.
4 more elements
A sheet separator for use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- a suction means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed on an end face which is located opposite the rotating member;
- support shaft means for mounting said suction means for rotation between a first position in which the air suction inlet is located rearwardly as viewed in the direction of rotation of the rotating member, of a line joining the axes of the rotating member and the support shaft, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- means communicating with the suction means for drawing air from the interior thereof at least during its movement from the position aligned with the line to the second position;
- drive means for moving the suction means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line;
- a nozzle means for injecting a quantity of air into the clearance between the end face of the suction means and the surface of the rotating member at least during the movement of the suction means from the position aligned with the line to the second position;
- and
- means for causing the velocity of movement of the end face of the suction means to exceed the peripheral speed of the rotating member.
4 more elements
A sheet separator for use in electrophotographic copying machines of the type comprising a rotating member for carrying copy sheets on the surface thereof, said separator comprising:
- a suction means disposed at a position adjacent the peripheral surface of said rotating member for separating a copy sheet from the surface when it is held attracted thereto, and having an air suction inlet formed on an end face which is located opposite the rotating member;
- support shaft means for mounting said suction means for rotation between a first position in which the air suction inlet is located rearwardly as viewed in the direction of rotation of the rotating member, of a line joining the axes of the rotating member and the support shaft, and a second position in which it is located forwardly of the line, said end face being located closest to the surface of the rotating member when aligned with the line;
- means communicating with the suction means for drawing air from the interior thereof at least during its movement from the position aligned with the line to the second position;
- drive means for moving the suction means from the first to the second position as the leading end of the copy sheet which is held attracted to the surface of the rotating member approaches said line and comprising cam means for operating said air drawing means;
- and
- a nozzle means for injecting a quantity of air into the clearance between the end face of the suction means and the surface of the rotating member at least during the movement of the suction means from the position aligned with the line to the second position.
3 more elements
Dependencies are inferred from the claim text.