Printing apparatus including a single revolution clutch
AssigneeNCR Corporation
InventorsFredrik L. N. Kallin, David G. Lant
Life of this patent
Estimating the term…
Abstract
A printing apparatus which includes a single revolution clutch. The clutch includes first and second cam sections which comprise the output member of the clutch. When the clutch is released, a spring accelerates the output member to bring a control surface on the second cam section into operative engagement with a cylindrically-shaped, rotating, input member. An abutment member on the first cam section cooperates with a follower arm to stop the rotation of the output member after a single revolution. A solenoid and linkage are used to raise the follower above the abutment stop to release the clutch for another single revolution of the output member.
Claims18
A single revolution clutch comprising:
- a frame;
- an input shaft and an output shaft rotatably mounted in said frame;
- an input member secured to said input shaft to rotate therewith;
- an output member secured to said output shaft to rotate therewith and also having first and second cam sections thereon;
- said first cam section having an abutment stop thereon;
- actuation means mounted on said frame for movement between stopping and releasing positions relative to said output member;
- said actuation means having a follower member which coacts with said abutment stop on said first cam section to stop the rotation of said output member in a stopped position when said actuation means is in said stopping position;
- said second cam section having first and second control surfaces thereon, with said first control surface of said second cam section being uncoupled from said input member when said output member is in said stopped position;
- resilient means for accelerating said output member from said stopped position to an engaging position where said second control surface of said second cam member engages said input member to thereby rotate said output member when said input shaft is rotated;
- and
- moving means for moving said actuation means between said stopping and releasing positions.
A printing apparatus comprising:
- a frame;
- an input shaft and an output shaft rotatably mounted in said frame;
- an input member secured to a first end of said input shaft to rotate therewith;
- means for rotating said input shaft at a constant velocity;
- an output member secured to a first end of said output shaft to rotate therewith and also having first and second cam sections thereon;
- said first cam section having an abutment stop thereon;
- a printing member secured to the second end of said output shaft to rotate therewith;
- a back-up member secured to the second end of said input shaft to rotate therewith;
- said printing member and said back-up member being aligned in printing relationship with each other;
- actuation means mounted on said frame for movement between stopping and releasing positions relative to said output member;
- said actuation means having a follower member which coacts with said abutment stop on said first cam section to stop the rotation of said output member in a stopped position when said actuation means is in said stopping position;
- said second cam section having first and second control surfaces thereon, with said first control surface of said second cam section being uncoupled from said input member when said actuation means is in said stopped position;
- resilient means for accelerating said output member from said stopped position to an engaging position where said second control surface of said second cam member engages said input member to thereby rotate said output member and said printing member to effect printing on a document inserted between said printing member and said back-up member;
- control means including an actuator for moving said actuation means between said stopping and releasing positions;
- and
- moving means for moving said actuation means between said stopping and releasing positions.
Dependencies are inferred from the claim text.