Knife holder for a wrapper cutter with a hand guard

摘要

PCT No. PCT/EP98/03595 Sec. 371 Date Apr. 12, 1999 Sec. 102(e) Date Apr. 12, 1999 PCT Filed Jun. 15, 1998 PCT Pub. No. WO99/07529 PCT Pub. Date Feb. 18, 1999A knife holder for holding a knife head has a circular wrapper cutter with a blade rotatably mounted in the knife head for engagement with a lower cutter to cause lengthwise separation of a material web. The knife holder has a base body for positioning the knife head and is mounted to a knife holder bar. A tie bar moves the knife head between a resting position and a cutting position where an area of the blade is exposed and is operatively engaged with the cutter. A protective hood covers at least a portion of the circumference of the circular wrapper cutter and is movable relative to the circular wrapper cutter between an operating position where the blade is exposed and a protective position where the protective hood covers at least a side of the blade. A pullback spring disposed between the protective hood and the tie bar holds the protective hood in the operating position when the wrapper cutter is in the cutting position, and a limit stop disposed on the base body pushes the protective hood into the protective position when the upper cutter is in the resting position.