Trace cutter for roll material

Apparatus for cutting sheet material from a body of such material wound about a cylindrical shell roller, such apparatus comprising:

• first and second arm means pendulously mounted for hanging from respective first and second ends of the cylindrical shell by freely bearing against an inner surface of the shell, and
• blade means affixed to said first and second arm means with a cutting edge oriented away from the roller and a aligned with respect to the arm such that the blade means hangs by the arm means parallel to the roller,
• said blade means lying generally within a tapered profile and said cutting edge being radiused such that when resting on a work table, said cutting edge and said work table form a line of contact for cutting said sheet material.

A device for cutting tracing paper from a roll of length L, such device comprising:

• a blade of length L
• a holder affixed to the blade and extending from the blade to the roll, such holder having, at an end thereof distal with respect to the blade, alignment means in rolling contact with a surface of the roll for aligning the blade parallel to the roll, said blade lying generally within a tapered profile and having a cutting edge which is radiused such that when resting on a work table, said cutting edge and said work table form a line of contact for cutting paper from the roll by tearing the tracing paper up against the blade.