Automated folder nipping roller adjustment

Details Automated folder nipping roller adjustment Automated folder nipping roller adjustment

B - Operations, Transporting

41

F

B41F 13/02 (2006.01) B41F 13/08 (2006.01) B65H 20/02 (2006.01)

Patent

CA 2215074

Web feed apparatus , for example in web printing and folding apparatus, has a pair of opposing rollers, one (28) on a fixed axis and one (22) laterally movable to define an adjustable nip gap between their peripheries. The gap is automatically set and adjusted by a setting screw (4) driven by a servo motor (60) with rotation of the screw monitors by a potentiometer sensor (64). A stop collar (52) on the screw limits axial displacement thereof to determine the set nip gap and a spring (50) urges the rollers towards each other but permits displacement under overload conditions. A rectilinear sensor (54) senses said conditions by monitoring relative displacement by of the stop collar and a programmable control system processes signals from the sensors and operates the servo motor accordingly.

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