Stack height sensor and elevator control for a continuous forms refolder
AssigneeGeneral Electric Company
InventorsCharles W. Spangler, Eugene S. Haymes
Life of this patent
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Abstract
Apparatus for sensing the height of a stack of fan-folded web being refolded, and controlling its elevation with respect to the arriving web to minimize misfolding.
Claims7
A stack height sensor and elevator control for a continuous fan-fold paper refolder wherein an elevator receives the unfolded paper coming from a source and drives it longitudinally toward a platform on which the paper is to be stacked, a motor for driving the elevator to maintain a range of desired spacing between the height of the stack of paper refolded on the platform and the elevator, a first timer responsive to the buildup of the stack height to a predetermined minimum distance with respect to the elevator for starting the motor after a first predetermined first time interval to start raising the elevator toward a predetermined maximum distance with respect to said stack height, a second timer responsive to said stacked height attaining a predetermined intermediate distance with respect to said elevator which is a function of said first time interval to stop the motor after a predetermined second time interval, a third timer responsive to said stacked height not attaining said intermediate level after a predetermined third time interval for stopping said motor.
A stack height sensor and elevator control for a continuous fan-fold paper refolder wherein an elevator receives the unfolded paper coming from a source and drives it longitudinally toward a platform on which the paper is restacked, a motor for driving the elevator to maintain a range of desired spacing between the height of the stack and the elevator, a radiant energy emitter and detector mounted on said platform for sensing the stack height to produce a first signal indicating radiant energy interruption by said stacked height, a first timer responsive to said first signal for starting the motor after a first predetermined time interval to start raising the elevator, a second timer responsive to re-establishment of radiant energy to stop the motor after a predetermined second time interval, and a third timer responsive to non-re-establishment of radiant energy after a predetermined third time interval to stop the motor.
A stack height sensor and elevator control for a continuous fan-fold paper refolder wherein an elevator receives the unfolded paper coming from a source and drives it longitudinally toward a platform on which the paper is to be stacked, a motor for driving the elevator to maintain a range of desired spacing between the height of the stack of paper refolded on the platform and the elevator, a sensor mounted on the elevator for sensing the buildup of the stack height to a predetermined minimum distance with respect to the elevator to produce a first signal, a first timer responsive to said first signal for starting the motor after a first predetermined first time interval to start raising the elevator toward a predetermined maximum distance with respect to said stack height, a second timer responsive to said stacked height attaining a predetermined intermediate distance with respect to said elevator which is a function of said first time interval to stop the motor after a predetermined second time interval, a third timer responsive to the sensed height of the stack not attaining said intermediate level after a predetermined third time interval for stopping said motor.
Dependencies are inferred from the claim text.