VORRICHTUNG ZUM QUERSCHNEIDEN EINER LAUFEND BEWEGTEN MATERIALBAHN, INSBESONDERE WELLPAPPE

摘要

Apparatus for driving a web crosscutting roller with knife blade. A variable speed motor drives the roller which also is of variable speed. A control device is operable on the motor to effect selective change of the rotative speed thereof. A spring is connected to the roller to alternatively impart retardation or acceleration energy to the roller during a revolution thereof by alternate tensioning and release of the spring.