Dual sharpener apparatus for maintaining the sharpness of the cutting edge on blades used to cut sheet-type work materials
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United States of America Patent
Stats
-
Jun 15, 2004
Grant Date -
Dec 13, 2001
app pub date -
Jan 8, 1999
filing date -
Jan 15, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sheet material cutting apparatus includes a cutting head and a knife frame rotatably coupled to the cutting head. A blade defining a cutting edge is coupled for reciprocation to the knife frame, as is a primary sharpener for sharpening substantially the entire cutting edge of the blade after it becomes dull from operation. A presser foot having a secondary sharpener mounted thereon, is also coupled to the knife frame for movement between a raised non-working and a lowered working position. The secondary sharpener includes a sharpening member engageable with the cutting edge of the blade via the action of an actuator, for sharpening a portion of the blade's cutting edge between primary sharpening operations.
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