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US 8,833,220 B1Granted
Knife assembly for a trimming machine
OwnerWoodrow A. Powers, IIinventor
Life of this patent
Estimating the term…
Abstract
A knife assembly for attachment to an industrial paper trimming or cutting machine having a primary blade and a backbone blade where the cutting edge of the backbone blade is offset at an angle α from the cutting edge of the primary blade. The knife assembly is removably attached to a cutting machine configured to move in a reciprocating motion to trim edges from soft bound single paper products.
Claims8
A knife assembly for a trimming or cutting machine comprising:
- a. a primary blade having a primary beveled side of a length L and a height H, a primary beveled edge of a height BEH, and a primary cutting edge, where the primary blade has a non-beveled side opposite the primary beveled side and contains a slot;
- and
- b. a backbone blade positioned in the slot and connected to the primary blade, where the backbone blade is of a width W and has a backbone beveled side, a backbone beveled edge of a width BBW, and a backbone cutting edge that lies in the same plane as the primary cutting edge,
- wherein a portion of the backbone cutting edge extends below the primary cutting edge and is offset from the primary cutting edge by an obtuse angle α that is at least 135 degrees and wherein the backbone blade is positioned in the slot such that a side of the backbone blade that is opposite of the backbone beveled side is flush with the non-beveled side of the primary blade;
- and
- wherein the slot intersects the primary beveled edge such that a portion of the primary cutting edge equal to the width W of the backbone blade is missing, the widths W and BBW of the backbone blade each being measured in the knife assembly in a direction that is parallel to the primary cutting edge.
3 more elements
A knife assembly for a trimming or cutting machine comprising:
- a. a primary blade having a primary beveled side and a primary cutting edge, where the primary blade has a non-beveled side opposite the primary beveled side and contains a slot;
- and
- b. a backbone blade attached in the slot, where the backbone blade is of a width W and has a backbone beveled side and a backbone cutting edge,
- wherein the backbone cutting edge:
- i) lies in the same plane as the primary cutting edge,
- ii) extends below and is offset from the primary cutting edge, and
- iii) is positioned in the slot such that a side of the backbone blade that is opposite of the backbone beveled side is flush with the non-beveled side of the primary blade, and
- wherein the slot intersects the primary beveled edge such that a portion of the primary cutting edge equal to the width W of the backbone blade is missing, the width W of the backbone blade being measured in the knife assembly in a direction that is parallel to the primary cutting edge.
5 more elements
Dependencies are inferred from the claim text.