Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1993-06-16
1995-05-23
Jones, Eugenia
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
83345, 83674, B23D 2512, B26D 162
Patent
active
054171326
ABSTRACT:
A pair of rotary die cylinders with lands having coacting cutting edges which cut blanks from a web of material passing through the nip of the rotating dies. In cross section each land has an outer face and a pair of spaced apart side faces which are parallel to each other and perpendicular to the chord of the outer face to provide a clean cut and facilitate release of the cut blank from the cutting blades as it emerges from the nip of the dies. The die cylinders are journalled for rotation by recesses with frusto conical locating surfaces in their opposed ends. Each die cylinder is made by machining the recesses in the opposed ends of a generally cylindrical workpiece of tool steel and then utilizing the recesses to locate and orient the workpiece relative to a cutting tool to produce a cylindrical surface on the workpiece concentric with the axis of the recesses and then to machine away portions of the periphery of the cylindrical surface to form the cutting blade lands thereon. After machining is completed the cutting blade lands may be hardened by heat treating utilizing a laser beam directed onto the lands to heat them at an elevated temperature so that upon quenching they are hardened without any substantial hardening and resulting distortion of the core or body of the workpiece.
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Cox William A.
Pfaff Alan R.
Jones Eugenia
Pfaff Alan R.
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