Apparatus for dry lubrication of a thin slitting blade
AssigneeMarquip, Inc.
InventorsRichard F. Paulson, James A. Cummings
Life of this patent
Estimating the term…
Abstract
A block of a solid lubricant material, such as PTFE, is biased continuously or intermittently against the cutting edge of a rotary slitting blade for corrugated paperboard. The solid lubricant block prevents the build up of starch adhesive and biasing movement compensates for wear of the block and wear of the cutting blade edge.
Claims20
A dry lubrication system for a web slitting machine including an annular rotary slitting blade for slitting into a running corrugated paperboard web, the dry lubrication system comprising:
- a first puck and a second puck of plastic lubricant held proximate a cutting edge of the slitting blade, the first puck contacting a first blade face of the slitting blade at a first blade face location and the second puck contacting a second, opposite blade face of the slitting blade at a second blade face location that is not immediately opposite the first blade face location, such that the first and second pucks are situated diagonally across the slitting blade from each other;
- and
- a first biasing mechanism that applies an external load to the first puck and thereby biases the first puck into continuous, generally uniform contact with the first blade face;
- wherein biasing of the first puck compensates for wear of the first puck due to contact with the first blade face and for wear of the blade cutting edge due to sharpening and continually advances the first puck in a lateral direction, perpendicular to the first blade face, to maintain the continuous, generally uniform contact as the first puck is worn away by the slitting blade.
A dry lubrication system for a web slitting machine including an annular rotary slitting blade for slitting into a running corrugated paperboard web, the dry lubrication system comprising:
- a lubricant holder box supported by the web slitting machine and having first and second opposing side faces connected by first and second opposing end walls, and an open operating face for insertion of a cutting edge of the slitting blade therein;
- first and second lubricant pucks held within the holder box, the first puck positioned proximate the first end wall of the holder box and contacting a first blade face of the slitting blade at a first blade face location and the second puck positioned proximate the second end wall of the holder box and contacting a second, opposite blade face of the slitting blade at a second blade face location that is not immediately opposite the first blade face location, such that the first and second pucks are situated diagonally across the slitting blade from each other;
- and
- first and second biasing mechanisms that apply external loads to the first and second pucks, respectively, so as to continuously advance the first and second pucks in a lateral direction, perpendicular to the first and second blade faces, against and into continuous contact with the first and second blade faces, respectively, as the first and second pucks are worn away by the slitting blade.
Dependencies are inferred from the claim text.